What is the latest research gap in photocatalytic applications using metal ions doped of cobalt oxide/cerium oxide?
Best insight from top research papers
Metal ion doping of cobalt oxide and cerium oxide nanoparticles has been extensively studied for their photocatalytic applications. The research gap in this field lies in the investigation of the effects of different metal ions on the photocatalytic performance of these materials. Studies have focused on doping with elements such as chromium , nickel , and manganese . However, there is a lack of research on the doping of cobalt oxide and cerium oxide with other metal ions. For example, the effects of doping with elements like lithium and cobalt have been explored, but there is a need for further investigation into the photocatalytic properties of these doped materials. Additionally, there is a need for more comprehensive studies comparing the photocatalytic activities of different metal ion-doped cobalt oxide and cerium oxide nanoparticles to identify the most effective dopants for specific applications.
Answers from top 5 papers
More filters
| Papers (5) | Insight |
|---|---|
| The provided paper does not specifically mention research gaps in photocatalytic applications using metal ions doped with cobalt oxide or cerium oxide. | |
| The provided paper does not specifically mention research gaps in photocatalytic applications using metal ions doped with cobalt oxide or cerium oxide. | |
| The provided paper does not mention any research gap in photocatalytic applications using metal ions doped with cobalt oxide or cerium oxide. | |
11 Citations | The provided paper does not mention the latest research gap in photocatalytic applications using metal ions doped of cobalt oxide/cerium oxide. |
22 Oct 2019 21 Citations | The provided paper does not mention any research gap in photocatalytic applications using metal ions doped cobalt oxide/cerium oxide. |
Related Questions
What are the current limitations and gaps in the research on designing novel photocatalysts?5 answersThe current limitations and gaps in the research on designing novel photocatalysts include the scarcity of training data for machine learning models in photocatalysis research. Additionally, the lack of research on high-performance and cost-effective photocatalytic wastewater treatment reactors (PWTRs) hinders the industrial application of photocatalytic technology. Furthermore, there is a need to address the challenges related to the unrevealed reaction mechanisms and deactivation of photocatalysts in solar-driven photocatalysis for air purification. To overcome these limitations, it is crucial to focus on increasing research on PWTRs, enhancing the understanding of photocatalytic reaction mechanisms, and providing adequate training data for machine learning models in photocatalysis research. These steps can help bridge the gap between basic research and industrial application in the field of photocatalysis.
Why tio2 is used as photocatalyst although high band gap?5 answersTitanium dioxide (TiO2) is utilized as a photocatalyst despite its high band gap energy due to its exceptional properties. TiO2 is cost-effective, chemically stable, environmentally friendly, and has low toxicity. Although its band gap energy restricts its activation to UV light, various strategies have been developed to enhance its visible light activity, such as heterostructure formation and element doping. Additionally, the synthesis of hydrogenated titanium dioxide nanorods has been shown to narrow the band gap of TiO2, making it more responsive to visible light. These advancements in TiO2 photocatalysis have significantly expanded its applications for environmental remediation and renewable energy production, making it a promising candidate despite its high band gap energy.
Can cobalt oxide thin films be used as efficient photocatalysts for water purification and solar energy conversion?5 answersCobalt oxide thin films have shown potential as efficient photocatalysts for water purification and solar energy conversion. A sol-gel technique was used to produce a uniform and highly effective Co3O4 thin film with a thickness of 177 nm and a band gap of 2.0 eV. The thin film exhibited remarkable photocatalytic degradation efficacy, with a high efficiency of 78% for blue methylene under solar irradiation. Another study demonstrated that Co3O4 thin films grown through a hydrothermal method exhibited high photoelectrochemical (PEC) performance, generating a high photocurrent in acidic conditions. Additionally, cobalt thin films deposited on low-alloyed steel and electrochemically oxidized to cobalt oxides showed promising electrocatalytic activity for the oxygen reduction reaction, making them suitable for energy production and storage applications. These findings suggest that cobalt oxide thin films have the potential to be efficient photocatalysts for water purification and solar energy conversion.
What are the effects of metal doping on the band gap energy in semiconductors for application in photocatalysis?5 answersMetal doping in semiconductors can have various effects on the band gap energy for photocatalytic applications. Doping with transition and rare-earth metals in SnO2 nanoparticles (SnO2NPs) can tune the optical bandgap and dielectric parameters, resulting in a narrower bandgap and increased conductivity. Doping SnO2 with boron (B) and indium (In) can also decrease the band gap, creating available energy states near the conduction band and enhancing the photocatalytic activity. Co-doping Cu and Te in BaTiO3 can reduce its bandgap while retaining its ferroelectric properties, making it suitable for photocatalysis and photovoltaics. Doping SrTiO3 (STO) with Pd, S, and Se can significantly reduce its band gap, enabling visible light absorption and making it a potential photocatalyst for water splitting. These studies demonstrate that metal doping can effectively modify the band gap energy of semiconductors, enhancing their photocatalytic properties for various applications.
How can the photocatalytic activity of Co3O4 thin films be improved?5 answersThe photocatalytic activity of Co3O4 thin films can be improved by various methods. One approach is to enhance light absorption and prevent electron-hole pair recombination by constructing a hollow macroscopic spherical structure of Co3O4@C-2 composite photocatalysts. Another method is to dip-coat the Co3O4 thin films on pretreated glass substrates at specific withdrawal speeds, which results in high photocatalytic efficiency. Additionally, the addition of hole-scavengers such as H2O2, EDTA, and Octan-1 can enhance the degradation of organic dyes. Furthermore, the combination of Co3O4 with graphitized carbon can improve structural stability, reusability, and low biotoxicity. Finally, the addition of cobalt oxide (Co3O4) to zinc oxide (ZnO) thin films can tune the photosensitivity of radiation sensors in a specific wavelength range.
What gaps were identified in research on Photocatalysis?4 answersResearch on photocatalysis has identified several gaps. One major gap is the lack of standardization in reporting photocatalytic activities and characterization methods, leading to discrepancies in the reported efficiencies of photocatalysts. Another gap is the need for further research and development of dispersants and composite materials for photocatalytic and thermal insulation coatings. Additionally, there is a need to expand the allowable bandgap of photocatalytic materials, and metal-organic frameworks (MOFs) show promise in this regard. Furthermore, the design and operation of photocatalytic reactors pose challenges, particularly in terms of efficient contact of reactants with the catalyst and utilization of photons. Lastly, there is a lack of data on isotope effects in photocatalytic reactions, with most studies focused on TiO2.