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Dopant on Mixed Oxide

Amorphous solid

Chemical vapor deposition

Toluene oxidation

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Dopants play a crucial role in modifying the properties of mixed metal oxides. They can influence defect chemistry, surface morphology, and catalytic activity. For instance, dopants like ZrO2 and CeO2 in MgO films enhance secondary electron emission properties by facilitating oxygen vacancy formation and influencing the formation of mixed phases. In another study, dopants in mesoporous alumina supported Pd catalysts showed that basic elements improved Pd dispersion and catalytic activity, while acidic elements had the opposite effect. Doping also alters electronic and optical properties, creating new energy levels and optical modes in the host oxide. Overall, dopants in mixed metal oxides offer a versatile approach to tailor material properties for various applications.

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Journal Article•DOI Exploring routes to tailor the physical and chemical properties of oxides via doping: an STM study Niklas Nilius 07 Jul 2015-Journal of Physics: Condensed Matter 14 Citations	Dopants in oxides alter properties by creating charge centers, inducing energy levels, and affecting surface morphology, impacting electronic, optical, and chemical characteristics.
Journal Article•DOI The effects of dopant on catalytic activity of Pd/mesoporous alumina for toluene oxidation Chengyan Ge, Lixia Xu, Jingfang Sun, Hongxia Liu, Qing Tong, Weixin Zou, Changjin Tang, Haiqin Wan, Lin Dong, Yu Wen Chen - Show less +9 more 01 Mar 2021-Research on Chemical Intermediates 1 Citations	Dopants like Ba and Mg in Pd/mesoporous alumina catalysts enhance Pd dispersion, electronic state, and reducibility, leading to increased catalytic activity for toluene oxidation.
Open access•Journal Article•DOI Mixed Films Based on MgO for Secondary Electron Emission Application: General Trends and MOCVD Prospects I. G. Vasilyeva, E. S. Vikulova, Alena A. Pochtar, Natalya B. Morozova - Show less +3 more 02 Feb 2021-THE Coatings 4 Citations	Dopants like ZrO2 and CeO2 enhance oxygen vacancies in MgO films, influencing mixed phase formation and secondary electron emission properties, as studied in the paper.
Book Chapter•DOI The role of dopant on the defect chemistry of metal oxides 01 Jan 2023	Dopants play a crucial role in altering the defect chemistry of metal oxides, influencing their properties and enabling the tuning of mixed oxide compositions for specific applications.
Journal Article•DOI Divergent influence of {1 1 1} vs. {1 0 0} crystal planes and Yb3+ dopant on CO oxidation paths in mixed nano-sized oxide Au/Ce1−xYbxO2−x/2 (x = 0 or 0.1) systems Piotr Woźniak, Piotr Kraszkiewicz, Małgorzata A. Małecka - Show less +2 more 14 Sep 2020-CrystEngComm 4 Citations	Yb3+ dopant in Au/Ce1−xYbxO2−x/2 systems influences CO oxidation differently based on crystal planes, enhancing reactivity in both octahedron-like and cube-like morphologies.

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What are the potential benefits of using doping/substitution techniques to enhance the photocatalytic activity of metal oxide-based photocatalysts?4 answersDoping or substitution techniques offer significant benefits in enhancing the photocatalytic activity of metal oxide-based photocatalysts. By introducing metal additives like Pd, Cu, Na, or utilizing charge transfer-induced doping strategies, the efficiency of charge separation and interfacial charge transfer can be improved. Co-doping with different metals and nonmetals, such as Ce/N or Cr/Fe, modifies the band gap of TiO2 nanoparticles, enabling visible light absorption and enhancing photocatalytic activity. Additionally, doping transition and rare-earth metals like Sm in SnO2 nanoparticles can tune the optical bandgap, increase conductivity, and improve dielectric parameters, crucial for applications like optoelectronic devices and photocatalysis. Atom doping, as seen in g-C12N14 photocatalysts, can enhance catalytic performance by changing the electronic state of the surface and improving optical absorption range.

What are the group of mixed metal oxides?4 answersMixed metal oxides are a class of materials that consist of a combination of different metal elements and oxygen. These oxides have a wide range of applications in catalysis, energy conversion, and storage systems. They exhibit multifunctional behavior and can be used in various reactions, including acido-base and selective oxidation reactions. Mixed metal oxides can be produced in the form of particles containing lithium cations and cations of transition metals such as nickel, cobalt, manganese, titanium, vanadium, chromium, and iron. They can also be obtained from the reaction of titanium alkoxides with metal acetates and methacrylic acid, resulting in mixed-metal oxo clusters with different compositions. Additionally, nonstoichiometric, mixed-metal oxides with fast oxygen conducting properties have shown promise as electrocatalysts for oxygen electrocatalysis in energy conversion and storage systems.

How does the oxidation of metal dopant affect the reduction of spillover effect in gas sensor?4 answersThe oxidation of metal dopant in gas sensors can affect the reduction of the spillover effect. Metal oxide gas sensors, such as tin dioxide (SnO2) sensors, have been developed to increase gas sensing characteristics. Doping with various metal oxides, including metal dopants, can influence the gas-sensing properties of the sensor, such as sensitivity and selectivity. Metal oxide doped SnO2 sensors have shown a strong response to gases like SO2 and NO2. Additionally, the operating temperature of the sensor can also impact its response. SnO2 sensors have been found to have high sensitivity over a wide temperature range, from 100-350 °C. Therefore, the oxidation of metal dopant in gas sensors can play a crucial role in enhancing the sensor's sensitivity and response to specific gases, depending on the operating temperature and the type of metal oxide dopant used.

How does the oxidation of metal dopant in gas sensor affect the gas response?3 answersThe oxidation of metal dopants in gas sensors can affect the gas response by creating defects and oxygen vacancies, which can enhance the gas sensing capabilities of the sensor. Oxygen vacancies, created by the oxidation of metal dopants, can generate free electrons, increasing the sensor response. These defects and oxygen vacancies can also lead to changes in the microstructure and morphology of the metal oxide semiconductor (MOS), as well as alter its activation energy, optical absorption, and band gap, thereby enhancing the characteristics of the MOS for gas detection. Dopants in MOS materials can cause defects and improve gas sensing capabilities by creating oxygen vacancies. Overall, the oxidation of metal dopants in gas sensors can play a crucial role in enhancing the gas response by creating defects and oxygen vacancies, which improve the sensitivity and selectivity of the sensor towards specific gases.

What is the present work on dopant for zno varistor?5 answersThe present work on dopants for ZnO varistors includes the use of boron and yttrium ions. Another composition excludes the content of Bi_2O_3, V_2O_5, Pr_6O_11, and Pr_2O_3, and instead includes ZnO, Bi_2Mo_3O_12, and Mn oxide. Additionally, a ZnO varistor powder has been developed with zinc oxide as the major component and minor components such as bismuth, cobalt, manganese, antimony, nickel, and aluminum. The effect of Ga doping on the grain boundary properties of ZnO varistors has also been studied. Overall, the research on dopants for ZnO varistors focuses on improving their nonlinear coefficient, reducing leakage current, and enhancing their operating voltage and current-voltage nonlinear resistance characteristics.

How is dopant concentration calculated?10 answers

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