Article
Chemistry, Physical
Alexander B. Tesler, Takumi Sannomiya, Seyedsina Hejazi, Reza Mohammadi, Nicolas Vogel, Marco Altomare, Patrik Schmuki
Summary: A photoanode concept based on metal nanoparticles for PEC water splitting is introduced, with a Ti mirror significantly enhancing the PEC activity in the visible spectral range. The enhancement is affected by both intraband and interband excitations within the TiO2 layer. Copper and silver nanoparticles show higher enhancement factors compared to gold nanoparticles.
Article
Green & Sustainable Science & Technology
Sangmo Kang, Jungho Hwang
Summary: This study presents a strategy for fabricating reduced graphene oxide-wrapped Ag/TiO2 nanofibers and demonstrates their efficient CO2 photoreduction performance under visible light.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Yahui Zhou, Xiaohua Cheng, Zijian Duan, Xin Liu, Huiyu Yang, Bo Deng
Summary: In this study, black TiO2 microspheres photocatalysts with high light absorption intensity and photosensitive activity were prepared using a simple two-step method. The reduced TiO2 exhibited a unique core-shell composite structure, which effectively reduced the band gap of the photocatalyst. The photocatalytic activity of the prepared catalyst was higher than that of the commercial catalyst.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Seyed Masoud Parsa, Alireza Yazdani, Hayder Dhahad, Wissam H. Alawee, Sadra Hesabi, Fatemeh Norozpour, Y. Davoud Javadi, Hafiz Muhammad Ali, Masoud Afrand
Summary: The study explores the use of silver, gold, and titanium dioxide nanoparticles in solar stills and finds that silver nanoparticles significantly improve performance, making them the most effective choice. Gold nanoparticles, on the other hand, are not suitable due to their high cost.
JOURNAL OF CLEANER PRODUCTION
(2021)
Review
Chemistry, Multidisciplinary
Peng-Peng Yang, Min-Rui Gao
Summary: This article discusses strategies to improve CO2RR performance by enriching reactants and intermediates through catalyst design, local microenvironment modulation, electrolyte regulation, and electrolyzer optimization. The structure and properties of CO2 are presented to demonstrate the necessity and feasibility of reactant and intermediate enrichment. Catalyst design at various scales and the impact of catalyst restructuring on enrichment effects are highlighted. The modulation of local microenvironment and electrolyte to enrich reactants and intermediates is discussed. The importance of electrolyzer optimization in promoting enrichment effects is also considered. The review concludes with an outline of remaining technological challenges and suggestions for the future implementation of enrichment strategies in CO2 electrolysis technology.
CHEMICAL SOCIETY REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Lijun Wang, Zhengxu Li, Yinan Jiang, Takaomi Itoi, Hiroyuki Yoshida, Yun Lu
Summary: Nonstoichiometric TiO2-x compacts were obtained via spark plasma sintering and their thermoelectric properties were investigated. The introduction of oxygen deficiencies positively affected the electrical resistivity and thermal conductivity, but decreased the Seebeck coefficient.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Engineering, Multidisciplinary
Wahyudiono, Hiroki Kondo, Siti Machmudah, Hideki Kanda, Yaping Zhao, Motonobu Goto
Summary: The study demonstrated the utilization of an electric field generated by high voltage discharge plasma over a liquid water surface containing glycine compound to synthesize TiO2 nanoparticles. The applied voltages, pulse numbers, and repetition rates significantly influenced the decomposition reaction of glycine compounds and electrode erosion. The UV-vis spectra and HRTEM images confirmed the formation of TiO2 nanoparticles and TiC as nanoparticle products, suggesting that this process has potential for advanced nanoparticle synthesis technology.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Yan Sun, Lu Xu, Pengkang Jin, Xue Bai, Xin Jin, Xuan Shi
Summary: The research discovered that when organic compounds were mixed with hexavalent chromium, titanium dioxide could simultaneously degrade organic compounds and reduce hexavalent chromium under visible light irradiation. The findings provide valuable insights for sewage treatment, especially for composite wastewater containing organic pollutants and hexavalent chromium.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Kallyni Irikura, Joao Angelo Lima Perini, Jader Barbosa Silva Flor, Regina Celia Galvao Frem, Maria Valnice Boldrin Zanoni
Summary: The study utilized Ru-3(BTC)(2) MOF thin film as a photocathode to successfully reduce CO2 into methanol, increasing the product yield. By depositing the MOF onto Ti/TiO2 electrodes, a new generation of multifunctional materials was formed, promising the development of novel photoelectrocatalysts.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Metallurgy & Metallurgical Engineering
Hai-yan Zheng, Yong-chun Guo, Feng-man Shen
Summary: To produce low-cost titanium efficiently, studies on reducing metallic Ti from titanium dioxide using metallothermic reduction in cold pressed pellets were conducted. The research focused on the reduction mechanism and the influence of reduction temperature, time, and mole ratio of TiO2 to CaCl2 on the process. Results showed that optimal conditions led to high reduction efficiency and strength in the pellets.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2021)
Article
Chemistry, Physical
Alejandra Romero-Moran, Jose L. Sanchez-Salas, Joel Molina-Reyes
Summary: The study established the influence of the crystalline phase and agglomeration degree of TiO2 nanoparticles on photocatalytic hydroxyl radical formation and bacterial inactivation in TiO2/SiO2 composite coatings. A relationship between hydroxyl radicals' formation and charge carrier transfer mechanism between defect levels in SiO2 and TiO2 embedded nanoparticles was established through a simple spectroscopic method. This correlation complements the lack of mechanisms behind the photocatalytic activity in TiO2/SiO2 composites.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Physics, Applied
Hiroshi Kakiuchida, Masahisa Okada, Yasusei Yamada, Masato Tazawa
Summary: Titanium-vanadium dioxide films with different compositions were analyzed using ellipsometry at various temperatures to study their optical properties. The results showed changes in energy gaps and electron quantities during electronic band transitions near the semiconductor-to-metal transition temperature.
APPLIED PHYSICS LETTERS
(2021)
Article
Thermodynamics
Fei Jin, Chao Xu, Jiaxin Xing, Xin Li, Xin Xia, Zhirong Liao
Summary: This study proposes titanium dioxide-based isothermal methanothermal and carbothermal redox cycles as efficient methods for solar fuel production and evaluates them thermodynamically. The results suggest that these cycles have the potential to become competitive routes for solar fuel production.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Multidisciplinary
Cheng Chang, Jiguo Tu, Yunfei Chen, Mingyong Wang, Shuqiang Jiao
Summary: A low-temperature electro-deoxidation strategy for solid SeO2 was proposed for the first time, and the process and products were analyzed in detail. This has significant implications for short-process and green metallurgy of other characteristic scattered metals.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Kirill M. M. Bulanin, Alexei V. V. Emeline, Ruslan V. V. Mikhaylov, Alena Y. Y. Mikheleva, Aida V. V. Rudakova, Vladimir K. K. Ryabchuk
Summary: In this research, the UV-stimulated processes in the TiO2-COg system were studied using in situ FTIR spectroscopy and photoelectron spectroscopy. The kinetic dependences of the adsorbed CO intensity and background absorption, as well as the positions of the Fermi level in TiO2, were analyzed and compared before, during, and after UV irradiation. The reversible shift in the adsorption-desorption equilibrium was explained by changes in the electronic state of the photocatalyst under UV irradiation. The proposed mechanism of photostimulated CO adsorption and re-adsorption in the TiO2-COg system is described in detail, including the formation of strongly bound surface carbonates caused by the side reaction of CO photooxidation.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
