Article
Materials Science, Ceramics
Junwei Hou, Lingcong Kong, Yu Xie, Jingui Ma, Yansheng Liu, Mengmeng Chen, Qingyao Wang
Summary: The study focused on the construction of ternary metal oxide to enhance the photoelectrochemical performance of TiO2 photocatalysts, with Bi2Sn2O7 nanoparticles sensitizing the TiO2 nanotube arrays. This sensitization extended the solar absorption range into visible light, leading to improved photoelectric performance and enhanced photocatalytic activities for various pollutants under solar irradiation. The formation of a Bi2Sn2O7/TiO2 NTAs heterojunction was beneficial for photoelectron transfer and active radical formation, with .OH and .O2- identified as decisive species for dye degradation. Additionally, the photocatalytic water splitting for H2 evolution showed high efficiency and stability.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Environmental
Haitham M. El-Bery, Hani Nasser Abdelhamid
Summary: Water splitting via photocatalysis using titanium dioxide holds great potential for hydrogen gas generation. In this study, cobalt oxide embedded nitrogen-doped carbon (Co3O4@C) was synthesized using zeolitic imidazolate framework (ZIF-67) as a sacrificial precursor, which showed significant enhancement in photocatalytic performance and hydrogen generation rates when used as a co-catalyst with TiO2. The Co3O4@C/TiO2 system exhibited recyclability for more than four cycles without significant loss of performance, indicating its potential for further exploration in effective photocatalysis.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Review
Chemistry, Physical
Khuzaimah Arifin, Rozan Mohamad Yunus, Lorna Jeffery Minggu, Mohammad B. Kassim
Summary: Photoelectrochemical water splitting is an ideal method for clean hydrogen production, but developing photoelectrodes that meet the criteria remains a challenge for commercialization. Titanium dioxide nanotubes, with their one-dimensional structure, have a relatively wide bandgap, limiting light utilization. Various approaches, such as surface modification and band structure modification, have been developed to improve TiO2 nanotubes, achieving high photocurrent density and stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Applied
Zhiying Xu, Chunyu Guo, Xin Liu, Ling Li, Liang Wang, Haolan Xu, Dongke Zhang, Chunhu Li, Qin Li, Wentai Wang
Summary: In this study, a promising organic/inorganic composite catalyst Ag/PANI/3DOMM-TiO2 was designed and prepared, which showed enhanced hydrogen production activity and current density in both photocatalytic and photoelectrochemical water splitting.
CHINESE JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Physical
Yahia H. Ahmad, Fadi Z. Kamand, Atef Zekri, Kyu-Jung Chae, Brahim Aissa, Siham Y. Al-Qaradawi
Summary: In this study, a MoSe2/1 D TiO2 nanorods heterojunction assembly was fabricated and its photo-electrocatalytic properties were investigated. The assembly exhibited enhanced spectral and photoelectrochemical properties compared to pure TiO2 nanorods due to the tailored loading of MoSe2 nanosheets and the 1D structure of TiO2 nanorods.
APPLIED SURFACE SCIENCE
(2023)
Article
Electrochemistry
Tengfei Nie, Zhiqing Li, Xinyi Luo, Yonglu She, Liang Liang, Qiang Xu, Liejin Guo
Summary: This paper investigates the evolution of bubbles on the photoelectrode surface and their impact on mass transfer and resistance in photoelectrochemical water splitting. It is found that the resistance decreases significantly at the beginning of bubble growth, but remains almost constant in the later stages. Bubble diameter and contact angle are influenced by light intensity, while bubble nucleation frequency is affected by reaction rates. A force balance model predicts that surface tension and Marangoni force are the main forces preventing bubble departure from the electrode surface.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
Yanfei Li, Ruikang Zhang, Jianming Li, Jingchao Liu, Yucong Miao, Jian Guo, Mingfei Shao
Summary: A ternary photoanode TiO2/CuPc/NiFe-LDH is reported in this study, which shows enhanced light absorption and water oxidation efficiency. The synergistic effect of CuPc and NiFe-LDH significantly improves the photocurrent density and stability of the photoanode.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Physical
Samar M. Fawzy, Ghada E. Khedr, Nageh K. Allam
Summary: Density functional theory was used to investigate the effect of Te-Ti doping on TiO2. Te doping resulted in band gap narrowing and the formation of mid-gap states, reducing the birefringence of TiO2 in the UV region. Te-Ti combined with native oxygen vacancies and hydrogen interstitials showed potential as catalysts for photo-electrochemical water-splitting. The catalytic activity for oxygen evolution reaction was highest in Te-Ti + O-v material, while for hydrogen evolution reaction, Te-Ti + H-i material performed the best.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Ming Meng, Yamin Feng, Chunyang Li, Zhixing Gan, Honglei Yuan, Honghui Zhang
Summary: Black 3D-TiO2 nanotube arrays were successfully fabricated on titanium meshes using an electrochemical reduction method. The optimized arrays showed a maximal photocurrent density of 1.6 mA/cm(2) and a Faradic efficiency of 100%, four times higher than that of pristine 3D-TiO2 NTAs. The improved water splitting activity is attributed to the introduction of oxygen vacancies, which shrink the bandgap and enhance visible light utilization.
Article
Materials Science, Multidisciplinary
Ngo Ngoc Uyen, Le Thi Cam Tuyen, Le Trung Hieu, Thi Thu Tram Nguyen, Huynh Phuong Thao, Tho Chau Minh Vinh Do, Kien Trung Nguyen, Nguyen Thi Nhat Hang, Sheng-Rui Jian, Ly Anh Tu, Phuoc Huu Le, Chih-Wei Luo
Summary: In this study, TiO2 nanowires on TiO2 nanotubes arrays and Au-decorated nanostructures were designed for photoelectrochemical water splitting. Among them, Au NPs-NRs-TNWs/TNAs exhibited the highest photocurrent density and photocatalytic activity in the degradation of methylene blue.
Article
Chemistry, Physical
Lihao Yu, Weiqiang Fan, Ning He, Youchao Liu, Xiao Han, Feiyang Qin, Jinrui Ding, Guoxing Zhu, Hongye Bai, Weidong Shi
Summary: Hydrogen energy has attracted significant attention recently due to its potential to replace fossil fuels. A new secondary coordination strategy involving guest small ligands selectively quenching unsaturated metal sites of MOF has been proposed to establish a contrast system based on MOF with unsaturated metal sites. This strategy aims to provide insights for the rational fabrication of efficient photoelectrodes in photoelectrochemical systems.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Xiaoqian Huang, Ruikang Zhang, Xiaoru Gao, Borong Yu, Yuanzhe Gao, Zhan-gang Han
Summary: TiO2-R/A homojunction photoanode, fabricated by in situ growth of anatase TiO2 on TiO2-R surface, displays higher photocurrent density compared to TiO2-R/R photoanode. The intense band bending and enhanced surface area of TiO2-R/A homojunction facilitate charge separation and transmission, providing novel insights for designing and fabricating semiconductor photoanodes for highly efficient photocatalytic reactions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Abrar Ahmad, Fatih Tezcan, Gurbet Yerlikaya, Zia-ur-Rehman, Halime Paksoy, Gulfeza Kardas
Summary: In this study, a three-dimensional double layered rosette-rod TiO2/Bi2S3 heterojunction was successfully fabricated using a two-step hydrothermal method and solvothermal route. The seed layer approach was utilized to achieve uniform distribution of Bi2S3 and form a perfect heterojunction between TiO2 and Bi2S3. The photoelectrochemical performance testing showed that the synthesized RT_Bi2S3 photoanode demonstrated superior photocurrent density compared to other TiO2 and Bi2S3 based photoanodes reported in the literature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Chemistry, Multidisciplinary
Xiaoyan Zhang, Shengqi Zhang, Xiaoli Cui, Wei Zhou, Weimin Cao, Danhong Cheng, Yi Sun
Summary: This review focuses on the application of TiO2-based photoanodes in PEC water splitting. TiO2 exhibits high PEC water splitting performance, but its performance is hindered by certain disadvantages. The review highlights the mechanisms and key factors for achieving high solar-to-hydrogen conversion efficiency, as well as controllable synthesis and modification strategies. The future trends for TiO2-based photoanodes in PEC water splitting are also discussed.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Environmental Sciences
Hyekyung Cho, Hyunku Joo, Hansung Kim, Ji-Eun Kim, Kyoung-Soo Kang, Jaekyung Yoon
Summary: Erbium-doped TiO2 nanotubes exhibit enhanced photo-conversion efficiency and catalytic activity, showing great potential in hydrogen generation and organic wastewater degradation. The study highlights the significant impact of doping conditions on the material's optical and electrical properties, demonstrating the effectiveness of the current electrochemical approach for PEC water splitting.
