Article
Chemistry, Physical
Rui-Ping Li, Shui-Miao Yu, Zong-Yan Zhao
Summary: This study aims to enhance the photoelectrochemical (PEC) properties of CuFeO2 nanosheets by constructing closely bonded CuFeO2/ CuO heterostructures. Through an optimized fabrication process, the CuFeO2@VO-CuO core-shell architecture showed significantly improved PEC performance, with higher photocurrent density and overall efficiency. The solid atomic-level contact bonding at the CuFeO2@VO-CuO junction and the presence of oxygen vacancies play important roles in achieving efficient separation and transfer of photogenerated electron-hole pairs.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Jianyang Li, Jingqi Tian, Mengting Lu, Chenyu Yang, Huaiguo Xue, Tengfei Jiang
Summary: In this study, a 2D on 2D CuFeO2/Co-LDH heterojunction was prepared, which exhibited enhanced charge separation efficiency due to the interfacial built-in electric field. The optimized CuFeO2/Co-LDH-3 heterojunction showed the highest photocurrent and achieved optimal performance in the photocatalytic selective oxidation of benzyl alcohol.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Rui-Ping Li, Bao-Feng Shan, Zong-Yan Zhao
Summary: A series of CuFeO2 hexagonal nanosheets with different grain size were prepared by adjusting the synthesis conditions. The samples all showed a pure 3R-Delafossite phase, the same composition, the same optical absorption features, and the same hexagonal sheet morphology. However, the width and thickness of these nanosheets varied.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Mi Jung, Chang Woo Kim, So Yeon Kim, Amol U. Pawar, Don Keun Lee, Young Soo Kang
Summary: In this study, a functionalized photocathode using reduced graphene oxide (rGO) was investigated for the selective production of solar liquid fuels. The functionalization of rGO layers on the photocathode improved the charge transfer efficiency and enabled the production of liquid fuels selectively.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Qing Zhang, Bowen Zhai, Zheng Lin, Xinqing Zhao, Peng Diao
Summary: The construction of a novel CuO/CuBi2O4 bilayered structure and decoration with NiOx electrocatalysts effectively improved the photoactivity and photostability for PEC HER, setting a new efficiency benchmark and providing principles for designing layered heterojunctions for PEC water splitting.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Fatemah H. Alkallas, Amira Ben Gouider Trabelsi, Tahani A. Alrebdi, Ashour M. Ahmed, Mohamed Rabia
Summary: An optoelectronic device synthesized from a CuFeO2/CuO/Cu nanocomposite obtained through direct combustion of Cu foil coated with Fe2O3 nanomaterials was examined for its chemical, morphological, and optical properties. The nanocomposite showed enhanced optical properties compared to CuO nanomaterials, as evidenced by smaller bandgap values. The device exhibited high light sensitivity and efficiency in a broad optical region, covering UV, Vis, and near IR.
Article
Chemistry, Physical
Seung Yo Choi, Tae Woo Kim, Hye Won Jeong, Hyunwoong Park
Summary: This study synthesized heterojunction CuO and CuFeO2 (CFO) films via electrodeposition on Ti and Ni-deposited transparent conducting substrates and examined their photoelectrochemical behavior and unassisted photo-catalytic activities for CO2 conversion in aqueous bicarbonate solutions at circumneutral pH. The deposition of metal layers increased the electrical conductivity of the substrate, improving the deposition kinetics and establishing firm contact between CFO and the substrate. CFO films with Ti and Ni underlayers exhibited higher photocurrent generation and produced mixed C1-C4 chemicals, while bare CFO film only produced the C1 chemical.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Engineering, Electrical & Electronic
S. Preethi, S. Vivek, R. Priya, S. Balakumar, K. Suresh Babu
Summary: CuFeO2-ZnO heterostructures were successfully fabricated using a two-step precipitation-hydrothermal process, exhibiting enhanced photocatalytic performance compared to pure ZnO and CuFeO2. The 5% CuFeO2-ZnO heterostructure showed the best photocatalytic efficiency, with a faster degradation rate and higher charge carrier lifespan than CuFeO2 and ZnO. The presence of Type I heterostructures and outstanding recyclability further highlight the significance of forming p-type CuFeO2 and n-type ZnO heterostructures for improved photocatalysis.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Xu-Dong Dong, Zong-Yan Zhao
Summary: Spin polarization plays a crucial role in solar energy conversion materials and devices, and can be enhanced and regulated by crystal phase and external magnetic field, thereby improving solar energy conversion efficiency.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Energy & Fuels
Aya Ahmed, Ashour M. Ahmed, Ahmed A. Abdel-Khaliek, Mohamed Shaban, Ahmed Adel A. Abdelazeez, Mohamed Rabia
Summary: We prepared copper-doped strontium titanate (Cu-SrTiO3) perovskite material using a simple mass production method, and applied it as a coating on a CuFeO2/Cu photoelectrode for hydrogen generation from wastewater. The prepared perovskite materials had a compact nano-/microstructure and showed excellent optical properties. By analyzing the current-voltage relationship under different conditions, such as light intensity, wavelength, and temperature, we found that this approach has potential for both hydrogen generation and wastewater treatment without the need for additional electrolytes. The prepared photoelectrode exhibited high stability and low cost, making it a promising candidate for industrial applications.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Mahmoud A. Khalifa, Luying Shen, Jianming Zheng, Chunye Xu
Summary: The study introduces a novel photoanode with a tandem structure of ITO/WO3/Cu2O/CuO, which shows significant enhancement in solar energy conversion efficiency. The improvements are attributed to factors such as diverse light harvesting, accelerated charge separation, enhanced electrocatalytic activity, and the formation of a protective layer.
Article
Chemistry, Physical
Mengting Lu, Dailing Jia, Huaiguo Xue, Jingqi Tian, Tengfei Jiang
Summary: CuO material with suitable energy level and a bandgap of 1.2-1.9 eV shows promise for photo-electrocatalytic reduction of CO2. Photocorrosion, however, affects its performance. This study presents a method for synthesizing 0D/1D CuFeO2/CuO nanowire heterojunction arrays with large specific surface using in-situ synthesis. These arrays exhibit excellent activity for photoelectrochemical reduction of CO2 to ethanol, achieving an optimal faradaic efficiency of 66.73% at -0.6 V (vs. Ag/AgCl). The enhanced charge transfer mechanism is proposed based on the measurement of energy band structures, which involves the transfer of photogenerated holes and electrons between CuFeO2 and CuO under the influence of the interfacial built-in electric field of the heterojunction, leading to the selective reduction of CO2 to ethanol.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Yibo Niu, Yu Wang, Linli He, Yujie Wang, Huizhen Ma, Nan Li, Danli Xie, Jianshan Ye, Ying Ma
Summary: In this study, a simple in-situ growth strategy was developed to synthesize a CuI/Porphyrin-based graphdiyne (PDY) p-n heterojunction photocathode, which exhibited excellent photoelectrochemical performance and was capable of detecting L-Cys with a wide linear range and low detection limit.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Physical
Ning An, Lei Zhou, Wenli Li, Xiaoli Yuan, Li Zhao, Jingwei Huang, Yang Zhang, Houde She, Lei Wang, Qizhao Wang
Summary: Modifying semiconductor photoanode with efficient and cheap iron-based oxygen evolution cocatalyst along with functional interlayer is an efficient method to enhance the water splitting efficiency of photo-electrochemical (PEC). The poly-aminoanthraquinone (PDAAQ) plays a significant role as a proton receptor and can inhibit carrier recombination. The modified photoanode showed improved photocurrent and enhanced water oxidation kinetics.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Zikun Yang, Xiangfeng Peng, Jingxuan Zheng, Zhao Wang
Summary: Defect regulation and construction of heterojunction structures are effective strategies to improve the catalytic activity of catalysts. In this study, CuO/Cu-2(OH)(3)NO3 nanosheet heterostructure was successfully synthesized by rapidly converting CuO to CuO/Cu-2(OH)(3)NO3 using dielectric barrier discharge plasma. The samples prepared using plasma exhibited thinner thickness and larger specific surface area, and introduced oxygen vacancies and heterojunction interfaces. CuO/Cu-2(OH)(3)NO3 using plasma showed significantly higher catalytic activity compared to CuO and CuO/Cu-2(OH)(3)NO3 prepared using hydrothermal methods.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
