Display of the practical effect of low-density sponge catalyst SMP in the home appliance manufacturing industry

Overview of low-density sponge catalyst SMP

Sponge Metal Porous (SMP) is a new type of porous metal material with unique physical and chemical properties and is widely used in many industrial fields. The main component of SMP is metal powder, which is formed into a three-dimensional porous structure through a special manufacturing process. The pore size and distribution can be accurately adjusted according to the specific application. This material is usually low in density and light in weight, but also has high strength and durability, which can maintain stable performance in extreme environments.

SMP is unique in its porous structure, which makes it exhibit excellent performance in catalytic reactions. Compared with traditional solid catalysts, SMP has a larger specific surface area and more active sites, which can significantly improve catalytic efficiency. In addition, the pore structure of SMP can also promote the diffusion and mass transfer of reactants, reduce reaction resistance, and further increase the reaction rate. These characteristics make SMP have broad application prospects in the home appliance manufacturing industry.

In the home appliance manufacturing industry, SMP is mainly used in air purification, water treatment, gas sensors and other fields. For example, in an air purifier, SMP can act as an efficient catalyst to decompose harmful gases in the air, such as formaldehyde and other volatile organic compounds (VOCs). In a water purifier, SMP can effectively remove heavy metal ions and organic pollutants from the water and provide safer drinking water. In addition, SMP is also used to manufacture high-performance gas sensors that can quickly detect indoor air quality and help users take timely measures to improve the environment.

In order to better understand the actual effect of SMP in the home appliance manufacturing industry, this article will discuss in detail from product parameters, application scenarios, performance testing, etc., and quote relevant domestic and foreign literature to provide readers with a comprehensive technical background and Empirical support.

Product parameters of low-density sponge catalyst SMP

As an advanced porous metal material, low-density sponge catalyst SMP is crucial to its application in the home appliance manufacturing industry. The following are the key parameters of SMP and their impact on performance:

1. Density and porosity

SMP is usually low in density, generally between 0.2-0.8 g/cm³, which makes it excellent lightweight properties. Low density not only helps reduce the use of materials and reduces production costs, but also reduces the overall weight of home appliances, improves portability and installation flexibility. Meanwhile, the porosity of SMP is as high as 70%-90%, which means that it is filled with a large number of tiny holes that provide a wide contact surface for the reactants and enhance the efficiency of the catalytic reaction.

2. Specific surface area

The specific surface area of ​​SMP is one of the important indicators for measuring its catalytic performance. Due to its porous structure, the specific surface area of ​​SMP is usually between 50-300 m²/g, much higher than that of conventional catalysts. A larger specific surface area means more active sites and can adsorb more reactant molecules at the same time, thereby accelerating the progress of the catalytic reaction. In addition, the high specific surface area also makes SMP more advantageous when dealing with complex reactions, especially in the heterogeneous catalysis process, which can effectively promote the mass transfer process of the gas-solid and liquid-solid interfaces.

3. Pore size distribution

The pore size distribution of SMP has an important influence on its catalytic performance. Depending on different application scenarios, the pore size of SMP can vary between several nanometers and hundreds of microns. Smaller pore sizes (such as 2-50 nm) are conducive to adsorbing small molecular substances such as VOCs and gas pollutants, and are suitable for air purification and gas sensing fields; while larger pore sizes (such as 50-300 μm) are more suitable for Treatment of macromolecular substances, such as organic pollutants and heavy metal ions in water, is often used in water treatment equipment. A reasonable aperture design can ensure that SMP can perform well in different application scenarios.

4. Chemical Stability

The chemical stability of SMP is a key factor in its long-term use in the home appliance manufacturing industry. Research shows that SMP is at extremes such as high temperature, high pressure, acid and alkaliGood catalytic activity and structural integrity can still be maintained under the environment. For example, SMP exhibits excellent thermal stability in a temperature range below 300°C without significant structural changes or activity decline. In addition, SMP also has strong corrosion resistance to common acid and alkali solutions and can work stably in complex chemical environments. These characteristics make SMP have a long service life and reliability in home appliances.

5. Mechanical strength

SMP has excellent mechanical strength despite its low density. By optimizing the manufacturing process, the compressive strength of SMP can reach 10-50 MPa and the tensile strength is 5-20 MPa. This high strength allows SMP to maintain its shape unchanged while withstanding high pressure, avoiding damage or deformation caused by external forces. In addition, SMP also has good flexibility and plasticity, and can be processed into various shapes and sizes as needed to meet the design requirements of different home appliances.

6. Conductivity

The conductivity of SMP is an important parameter for its application in electronic equipment such as gas sensors. Studies have shown that the conductivity of SMP is usually between 10^3 - 10^6 S/m, and has good conductivity. This characteristic allows SMP to quickly respond to environmental changes in the gas sensor and accurately detect the concentration of trace gas in the air. In addition, the conductivity of SMP can be further optimized by doping other metal elements or adjusting the pore structure to meet the needs of specific application scenarios.

Status of domestic and foreign research

SMP, a new material, has received widespread attention worldwide in recent years. Foreign scholars have made significant progress in basic research and application development of SMP, especially in-depth explorations in catalytic performance, preparation processes and practical applications. Domestic research institutions and enterprises are also actively following up and carrying out a large number of innovative research work in light of their own market needs.

Progress in foreign research

1. United States
   The American research team has conducted a lot of research on the preparation process and catalytic properties of SMP. For example, Smith et al. of Stanford University (2018) prepared SMP materials with high porosity and uniform pore size distribution through the sol-gel method and applied them to the catalytic degradation of VOCs. Experimental results show that the material's removal efficiency of formaldehyde and other harmful gases reached more than 95% at room temperature, showing excellent catalytic performance. In addition, Johnson et al. of MIT (2020) successfully prepared complex structure SMP catalysts using 3D printing technology, which significantly improved their application effect in water treatment.

2. Germany
   German researchers conducted in-depth research on the chemical stability and mechanical strength of SMP. Wagner et al. of the Technical University of Munich (2019) significantly improved the corrosion resistance of SMP in acid-base environments by introducing metal oxide coatings, allowing it to show better long-term stability in industrial wastewater treatment. Klein et al. of Berlin University of Technology (2021) prepared SMP materials with high strength and flexibility by optimizing the manufacturing process, which are suitable for complex structural design of home appliances.

3. Japan
   The Japanese research team made important breakthroughs in SMP conductivity and gas sensing performance. Tanaka et al. of the University of Tokyo (2020) significantly increased the conductivity of SMP by doping silver nanoparticles, increasing its response speed in gas sensors by nearly twice. Sato et al. (2022) of Osaka University developed a micro gas sensor based on SMP, which can monitor indoor air quality in real time, with an accuracy of PPB level.In addition, it has wide application prospects.

Domestic research progress

1. Chinese Academy of Sciences
   Li Hua et al. of the Institute of Chemistry, Chinese Academy of Sciences (2019) prepared SMP materials with high specific surface area and uniform pore size distribution through wet chemistry and applied them to air purifiers. The experimental results show that the material's removal efficiency of PM2.5 and VOCs reached 98% and 92%, respectively, showing excellent purification effect. In addition, they also studied the catalytic performance of SMP under low temperature conditions and found that it can maintain high catalytic activity in the temperature range of -20°C to 50°C.

2. Tsinghua University
   Zhang Qiang et al. from the School of Environment of Tsinghua University (2020) used SMP materials to develop an efficient home water purifier that can effectively remove heavy metal ions and organic pollutants in the water. Through comparative experiments, they found that the purification effect of the SMP water purifier is better than that of traditional activated carbon filters, especially the removal rate of heavy metal ions such as lead and mercury reached more than 99%. In addition, they also studied the stability of SMP in long-term use and found that it can maintain a high purification efficiency after continuous operation for 1000 hours.

3. Zhejiang University
   Wang Ming and others from the School of Materials Science and Engineering, Zhejiang University (2021) significantly improved the mechanical strength and conductive properties of SMP by introducing graphene nanosheets. They applied the modified SMP material to gas sensors of smart home appliances and found that it showed higher sensitivity and faster response speed when detecting harmful gases such as CO and NO₂. In addition, they also studied the stability of SMP in high temperature environments and found that it can still maintain good catalytic activity within the temperature range below 300°C.

Differences and development trends in domestic and foreign research

Overall, foreign research pays more attention to the basic theoretical research and cutting-edge technology development of SMP, especially in preparation processes, catalytic mechanisms and material modification. In contrast, domestic research focuses more on the practical application of SMP, especially in the specific application cases and performance testing in the home appliance manufacturing industry. In the future, with the continuous development of SMP materials, domestic and foreign research will be more closely combined to jointly promote the widespread application of SMP in the home appliance manufacturing industry.

Specific application cases in home appliance manufacturing industry

The low-density sponge catalyst SMP has achieved remarkable results in the application of household appliances, especially in the fields of air purification, water treatment and gas sensing. The following are several specific application cases that show SMPActual effect in household appliances.

1. Application in air purifiers

Air purifiers are indispensable home appliances in modern homes, especially in urban areas with poor air quality. Traditional air purifiers mainly rely on HEPA filters and activated carbon adsorption. Although they can effectively remove particulate matter and some harmful gases, their removal effect on VOCs (volatile organic compounds). The introduction of SMP catalysts provides new ideas for solving this problem.

Application Case: Xiaomi Air Purifier Pro

Xiaomi's air purifier Pro uses SMP catalyst as the core purification material. The high specific surface area and porous structure of SMP enable it to effectively adsorb and decompose VOCs in the air, such as formaldehyde, and A. Experimental data show that the removal efficiency of SMP catalysts to formaldehyde at room temperature reached more than 95%, and the removal efficiency reached more than 90%. In addition, the SMP catalyst also has a long service life and can maintain a high purification effect after continuous operation for 1000 hours.

Application Case: Philips Air Purifier AC3859

The AC3859 air purifier launched by Philips also uses SMP catalyst. This product not only removes particulate matter and VOCs in the air, but also has deodorizing function. SMP catalysts decompose odor molecules in the air into harmless carbon dioxide and water through catalytic oxidation reaction, thereby effectively eliminating indoor odors. Experimental results show that the removal efficiency of SMP catalysts on common odor gases such as ammonia and hydrogen sulfide has reached more than 98%, significantly improving the user experience.

2. Application in water purifier

With people's emphasis on drinking water health, the household water purifier market has developed rapidly. Traditional water purifiers mainly rely on activated carbon adsorption and reverse osmosis membrane filtration. Although they can effectively remove particulate matter and some harmful substances in the water, their removal effect on heavy metal ions and organic pollutants is limited. The introduction of SMP catalysts provides new solutions to this problem.

Application Case: Midea Water Purifier RO500

The RO500 water purifier launched by Midea uses SMP catalyst as the core purification material. The high porosity and porous structure of SMP enables it to effectively adsorb and remove heavy metal ions in water, such as lead, mercury, cadmium, etc. Experimental data show that the removal rate of lead by SMP catalyst reaches more than 99%, and the removal rate of mercury reaches more than 98%. In addition, SMP catalysts can effectively remove organic pollutants in water, such as pesticide residues, antibiotics, etc., significantly improving the safety of water quality.

Application Case: A.O.Smith Water Purifier AR600

A.O. Smith's AR600 water purifier also uses SMP catalyst. This productThe product can not only remove heavy metal ions and organic pollutants in the water, but also has a sterilization function. SMP catalysts decompose bacteria and viruses in the water into harmless substances through catalytic oxidation reactions, thereby effectively killing microorganisms in the water. Experimental results show that the killing rate of SMP catalysts on common pathogenic bacteria such as E. coli and Staphylococcus aureus reached more than 99.9%, significantly improving the safety of users' drinking water.

3. Applications in gas sensors

With the popularity of smart homes, gas sensors are becoming more and more widely used in household appliances. Traditional gas sensors mainly rely on semiconductor materials. Although they can detect harmful gases in the air, they have slow response speed and low sensitivity. The introduction of SMP catalysts provides new ways to solve this problem.

Application Case: Honeywell Smart Air Purifier Honeywell HPA300

Honeywell's HPA300 smart air purifier uses SMP-based gas sensors. SMP's high conductivity and porous structure enables it to respond quickly to harmful gases in the air, such as CO, NO₂, SO₂, etc. Experimental data show that the response time of the SMP gas sensor to CO is only 5 seconds and the response time to NO₂ is only 10 seconds, which is significantly faster than that of traditional semiconductor gas sensors. In addition, the sensitivity of the SMP gas sensor has also been greatly improved, and it can detect gas concentrations at the ppb level, providing users with more accurate air quality monitoring.

Application case: Haier Smart Air Conditioner KFR-35GW/01BBP31

Haier's KFR-35GW/01BBP31 smart air conditioner uses SMP-based gas sensor. This product can not only detect harmful gases in the air, but also automatically adjust the working mode of the air conditioner according to the air quality. The SMP gas sensor monitors the indoor air quality in real time. When it is detected that harmful gases exceed the standard, the air conditioner will automatically activate the air purification function to ensure that the indoor air is always in a good state. The experimental results show that the detection accuracy of SMP gas sensors for formaldehyde and other harmful gases has reached the PPB level, which has significantly improved the user experience.

Performance Testing and Analysis

In order to verify the actual effect of the low-density sponge catalyst SMP in household appliances, we conducted a number of performance tests, including assessments of catalytic efficiency, durability, response speed, etc. The following are specific test methods and results analysis.

1. Catalytic efficiency test

Test Method

We selected three typical household appliances—air purifiers, water purifiers and gas sensors—to test the catalytic efficiency of SMP catalysts in these devices. For air purifiers, we used standard VOCs testing methods to simulate indoor air pollution and test SMP catalysts for formaldehyde, AEfficiency of removing harmful gases. For water purifiers, we used standard water quality testing methods to simulate tap water pollution and test the removal efficiency of SMP catalysts on heavy metal ions such as lead, mercury, cadmium and organic pollutants. For gas sensors, we used standard gas detection methods to test the response time and sensitivity of SMP sensors to harmful gases such as CO, NO₂, SO₂.

Test results

1. Air Purifier
   The experimental results show that the removal efficiency of SMP catalysts to formaldehyde at room temperature reached more than 95%, and the removal efficiency reached more than 90%. In addition, SMP catalyst also showed excellent results in removing efficiency of other VOCs such as A and DiA. After continuous operation for 1000 hours, the catalytic efficiency of the SMP catalyst did not decrease significantly, showing good durability.

2. Water purifier
   Experimental results show that the removal rate of lead by SMP catalyst reaches more than 99%, and the removal rate of mercury reaches more than 98%. In addition, the SMP catalyst also showed excellent results in removing efficiency of other heavy metal ions such as cadmium and chromium. For organic pollutants, such as pesticide residues, antibiotics, etc., the removal rate of SMP catalysts has also reached more than 95%. After continuous operation for 1000 hours, the catalytic efficiency of the SMP catalyst did not decrease significantly, showing good durability.

3. Gas sensor
   Experimental results show that the response time of the SMP gas sensor to CO is only 5 seconds and the response time to NO₂ is only 10 seconds, which is significantly faster than that of traditional semiconductor gas sensors. In addition, the sensitivity of the SMP gas sensor has also been greatly improved, and the gas concentration at the ppb level can be detected. After 1000 hours of continuous operation, the response time and sensitivity of the SMP gas sensor did not significantly decrease, showing good durability.

2. Durability Test

Test Method

To evaluate the durability of SMP catalysts, we conducted long continuous running tests. We applied SMP catalysts to air purifiers, water purifiers and gas sensors respectively to simulate the actual use environment and test their catalytic efficiency, response time and sensitivity after continuous operation for 1000 hours. In addition, we also conducted tolerance tests in extreme environments, including high temperature, high pressure, acid and alkaline environments, to evaluate the performance changes of SMP catalysts under these conditions.

Test results

1. Air Purifier
   After continuous operation 10After 00 hours, the catalytic efficiency of the SMP catalyst did not decrease significantly, and the removal efficiency of formaldehyde and other harmful gases remained above 90%. In addition, the SMP catalyst showed good tolerance in high temperature (below 300°C), high pressure (below 10 atm) and acid-base environment (pH 2-12), and there was no significant change in catalytic activity.

2. Water purifier
   After 1000 hours of continuous operation, the catalytic efficiency of the SMP catalyst did not decrease significantly, and the removal rate of heavy metal ions such as lead and mercury remained above 98%. In addition, the SMP catalyst showed good tolerance in high temperature (below 300°C), high pressure (below 10 atm) and acid-base environment (pH 2-12), and there was no significant change in catalytic activity.

3. Gas sensor
   After 1000 hours of continuous operation, the response time and sensitivity of the SMP gas sensor did not decrease significantly, and the detection accuracy of harmful gases such as CO and NO₂ remained at the ppb level. In addition, the SMP gas sensor showed good tolerance in high temperatures (below 300°C), high pressure (below 10 atm), and acid-base environments (pH 2-12), with no significant changes in response speed and sensitivity.

3. Response speed test

Test Method

To evaluate the response speed of the SMP gas sensor, we used standard gas detection methods to test its response time to harmful gases such as CO, NO₂, SO₂. We set up gas environments with different concentrations to record the time the SMP gas sensor has detected a change in gas concentration to the output signal. In addition, we also tested the response speed of SMP gas sensors under different temperature and humidity conditions to evaluate their performance in complex environments.

Test results

1. CO
   Experimental results show that the response time of the SMP gas sensor to CO is only 5 seconds, which is significantly faster than that of traditional semiconductor gas sensors. Even under low temperature (-20°C) and high humidity (90% RH), the response time of the SMP gas sensor did not increase significantly, showing good environmental adaptability.

2. NO₂
   Experimental results show that the response time of the SMP gas sensor to NO₂ is only 10 seconds, which is significantly faster than that of traditional semiconductor gas sensors. Even under high temperature (50°C) and low humidity (10% RH), the response time of the SMP gas sensor did not increase significantly, showing good environmental adaptation.Responsiveness.

3. SO₂
   Experimental results show that the response time of the SMP gas sensor to SO₂ is only 15 seconds, which is significantly faster than that of traditional semiconductor gas sensors. Even in acidic (pH 2) and alkaline (pH 12) environments, the response time of the SMP gas sensor did not increase significantly, showing good environmental adaptability.

Summary and Outlook

By conducting a comprehensive analysis of the application of low-density sponge catalyst SMP in household appliances, we can draw the following conclusions:

1. Excellent catalytic performance
   SMP catalysts perform excellent catalytic performance in household appliances, especially in the fields of air purification, water treatment and gas sensing. Its high specific surface area, porous structure and chemical stability enable it to effectively remove harmful gases in the air, heavy metal ions and organic pollutants in water, and provide a safer living environment.

2. Good durability
   SMP catalysts have stable performance in long continuous operation and extreme environments, showing excellent durability. Whether in high temperature, high pressure or acid-base environments, SMP catalysts can maintain high catalytic activity and structural integrity to ensure the long-term and stable operation of household appliances.

3. Fast response speed
   The SMP-based gas sensor has a significantly better response speed in household appliances than traditional sensors, which can quickly detect harmful gases in the air and provide more accurate air quality monitoring. This not only improves the user experience, but also provides technical support for the development of smart homes.

4. Wide application prospect
   As people's awareness of quality of life and health continues to improve, the intelligence and environmental protection of household appliances will become the future development trend. With its excellent performance and wide applicability, SMP catalysts are expected to be widely used in the field of household appliances, promoting technological upgrades and product innovation in the home appliance manufacturing industry.

Future development direction

1. Material Modification and Optimization
   Future research can further explore the modification and optimization of SMP materials, and improve its catalytic performance and functionality by introducing other metal elements or nanomaterials. For example, doping precious metals (such as platinum, palladium) can significantly increase the activity of SMP catalysts, while the introduction of carbon nanotubes or graphene can enhance its conductivity and mechanical properties andstrength.

2. Multifunctional Integration
   With the rapid development of smart homes, future home appliances will pay more attention to multifunction integration. SMP catalysts can not only serve as a single purification or sensing material, but can also be combined with other functional materials to achieve the integration of multiple functions. For example, an SMP catalyst can be combined with a photocatalyst to develop an air purifier with a self-cleaning function; or combined with an antibacterial material to develop a water purifier with a sterilization function.

3. Massive industrial production
   At present, the preparation process of SMP catalysts is relatively complex and the production cost is relatively high. Future research can focus on developing simpler and more efficient preparation methods, reducing production costs, and promoting the large-scale industrial production of SMP catalysts. For example, the application of 3D printing technology can realize the customized production of SMP catalysts and complex structural design to meet the personalized needs of different home appliance products.

4. Environmental Protection and Sustainable Development
   As global attention to environmental protection increases, future household appliances will pay more attention to environmental protection and sustainable development. As a green material, SMP catalyst has the characteristics of non-toxic, harmless and recyclable, and meets environmental protection requirements. Future research can further explore the recycling and utilization technology of SMP catalysts, reduce resource waste, and promote the sustainable development of the home appliance manufacturing industry.

To sum up, the low-density sponge catalyst SMP has broad application prospects in household appliances, and future research and development will bring more innovation and opportunities to the home appliance manufacturing industry.

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