Article
Chemistry, Physical
Aseom Son, Jiho Lee, Mingizem Gashaw Seid, Evandi Rahman, Jaewan Choe, Kangwoo Cho, Jaesang Lee, Seok Won Hong
Summary: This study investigates the dual role of Ti3+ self-doped TiO2 nanotubes (bl-TNA) as both an anode and a cathode in the photoelectrochemical (PEC) oxidative treatment of organic contaminants. The symmetric PEC system with bl-TNA photoelectrodes demonstrates higher interfacial charge transfer, photoresponsive activity, and kinetic constant for organic degradation compared to the asymmetric system with Ti cathodes. The addition of cathodic peroxydisulfate (PDS) enhances the photoactivity of the electrodes, particularly at the cathode.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Zheng Ma, Xiumin Ma, Lihui Yang, Xuehui Liu, Zhenyu Zhong, Baorong Hou
Summary: K-doped TiO2 nanotube arrays with superhydrophilicity and high photoelectrochemical cathodic protection performance were prepared via simple methods. The high photoelectroactivity and cathodic protection performance have been proven through various experiments and the mechanism has been verified through spectral and contact angle analysis.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Analytical
Wei Zhang, Yingying Lin, Rong Chen, Xun Zhu, Dingding Ye, Yang Yang, Jinwang Li, Youxu Yu, Qiang Liao
Summary: A self-doped TiO2 nanotube array photoanode was developed for a microfluidic all-vanadium photoelectrochemical flow battery to enhance solar energy storage performance. The self-doping extended the light absorption range and the one-dimensional nanotube structure promoted electron transport and separation efficiency, while miniaturization reduced mass transfer resistance. Upgrading light intensity and vanadium ion concentration could further improve photocurrent density and vanadium ion conversion rate.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Engineering, Environmental
Aseom Son, Jiho Lee, Changha Lee, Kangwoo Cho, Jaesang Lee, Seok Won Hong
Summary: The study investigated the impact of adding peroxydisulfate (PDS) to a photoelectrocatalysis (PEC) system using self-doped TiO2 nanotube arrays (bl-TNAs) for organic pollutant degradation. The addition of PDS significantly increased the removal efficiency of bisphenol-A (BPA) and other pollutants, with higher pseudo first-order reaction rate constants. The PEC/PDS system showed enhanced degradation performance and stability across a wide range of operating parameters and water matrices.
Article
Chemistry, Physical
Honghui Pan, Minghui Sun, Xiaoguang Wang, Ming Zhang, Muthu Murugananthan, Yanrong Zhang
Summary: This study developed an electric-assisted photocatalytic technique to reduce carrier recombination induced by doping, resulting in a remarkable improvement in charge carrier dynamics.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Nanoscience & Nanotechnology
Mingfei Chen, Shuxian Zhuang, Jinlu Cheng, Jinyuan Miao, Xuefeng Tai, Yinghua Gu, Zhiwei Qin, Jinpeng Zhang, Yang Tang, Yanzhi Sun, Pingyu Wan
Summary: The integration of copper oxides-derived nano-polycrystalline Cu (NPC Cu) with Ti3+-self-doped TiO2 nanotube arrays (NTA) was used to fabricate NPC Cu/H-TiO2 NTA, which showed potential in degrading nitrate-containing wastewater and synthesizing recyclable ammonia at atmospheric pressure and room temperature. The unique nanostructure of interlaced Cu nano-polycrystals and TiO2 nanotubes accelerated electron transfer and improved adsorption characteristics. Under specific reaction conditions, the NPC Cu/H-TiO2 NTA achieved high NO3- conversion, Faradic efficiency, and ammonia production yield. This well-designed electrocatalyst possesses promising potential in ammonia production.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Spectroscopy
Junwei Hou, Tengze Xu, Yanbin Ning, Bingxuan Huang, Ye Yang, Qingyao Wang
Summary: Ti3+ self-doped TiO2-x nanotube arrays were prepared and characterized, showing high visible light response, photocurrent, and photoelectrocatalytic activities. The improved performance was attributed to the synergistic effect of narrowed energy gap and enhanced electron transportation, providing new opportunities for high-performance solar cells and photocatalysts.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Physical
Ling Ouyang, Xun He, Shengjun Sun, Yongsong Luo, Dongdong Zheng, Jie Chen, Yinwei Li, Yuxiao Lin, Qian Liu, Abdullah M. Asiri, Xuping Sun
Summary: Electrochemical nitrite reduction provides an environmentally friendly method for removing hazardous NO2- and synthesizing sustainable NH3. A P-doped TiO2 nanobelt array supported on titanium plate (P-TiO2/TP) acts as a highly efficient electrocatalyst for the reduction of NO2-, achieving a satisfactory faradaic efficiency of 90.6% and a large NH3 yield of 560.8 mu mol h(-1) cm(-2), surpassing pristine TiO2/TP. In addition, the catalytic mechanism is also revealed through theoretical calculations.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Wencheng Wang, Zhengxian Yang, Guyuan Li, Yong Zhang, Wangcheng Cao, Jiankun Xu, Rongtian Zheng
Summary: N-type CuInS2 nanoparticles were successfully deposited on n-type TiO2 nanotubes using the SILAR technique, forming CuInS2/TiO2 films. The favorable n-n heterojunction structure of CuInS2/TiO2 showed excellent photoelectric conversion efficiency and photo response under visible light irradiation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Haipeng Wang, Fei Zhang, Mengmeng Jin, Donglin Zhao, Xiaoya Fan, Zerong Li, Yongsong Luo, Dongdong Zheng, Tingshuai Li, Yan Wang, Binwu Ying, Shengjun Sun, Qian Liu, Xijun Liu, Xuping Sun
Summary: A highly efficient electrocatalyst for NO2 reduction to NH3 was reported in this study, which consisted of V-doped TiO2 nanobelt array on a titanium plate. Both experimental results and theoretical calculations revealed that V doping enhanced the electrical conductivity of the nanobelt and optimized the free energy of the TiO2 specialIntscript crystal plane in the potential determining step, resulting in a positive effect on the electrochemical NO2 reduction to NH3. The designed V-TiO2/TP exhibited outstanding electrochemical NO2 reduction performance with a high NH3 yield of 540.8 μmol h-1 cm-2 at -0.7 V and an excellent Faradaic efficiency of 93.2% at -0.6 V versus reversible hydrogen electrode, surpassing TiO2/TP.
MATERIALS TODAY PHYSICS
(2023)
Article
Materials Science, Composites
Wenfa Du, Fengyan Han, Mingwan Zhang, Cheng Qian, Xiaofei Yang
Summary: Designing advanced catalysts with atomic level control over the heterointerfaces and active sites is crucial for catalytic reduction reactions. Co nanoparticles wrapped by N-doped carbon nanotube heterostructures synthesized at specific temperature showed enhanced catalytic activity, attributed to synergistic interactions between Co nanoparticles and N-doped carbon nanotubes. The catalyst exhibited high stability and small losses in catalytic activity during recycling experiments, showing potential for cost-effective non-precious metal-based catalysts in scalable and high-performance catalytic reduction reactions.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Teayoung Lee, Seongsoo Kim, Joon Young Choi, Changha Lee, Choonsoo Kim, Jeyong Yoon
Summary: Electrochemically reduced TiO2 nanotube arrays have shown promising performance in chlorine evolution reaction, particularly at low chloride concentrations, with minimal impact from other anions.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Shiqi Wang, Zeling Zhang, Wenyi Huo, Xuhai Zhang, Feng Fang, Zonghan Xie, Jianqing Jiang
Summary: The simultaneous enhancement of bulk and surface separation of photoinduced charges by combining crystallographic preferred orientation and surface oxygen vacancies in single crystal-like black Zr doped TiO2 nanotube arrays film presented an effective photocatalytic reduction of heavy metal ions. The introduction of crystallographic preferred orientation suppressed recombination centers in bulk and facilitated rapid separation/migration of photo-generated carriers, while the surface oxygen vacancies acted as electron trapping sites to inhibit charges recombination and widen the light-absorption range up to 1200 nm. The resulting BLK-Zr-NTAs exhibited outstanding photocatalytic performance towards Cr(VI) reduction without the need for sacrificial agents or co-catalysts, making it one of the best photocatalysts reported for this purpose.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Chong Wang, Tianai Zhang, Lifeng Yin, Chengsheng Ni, JiuPai Ni, Li-An Hou
Summary: This study demonstrated the electrochemical degradation of PFOA using Ti3+ self-doping TiO2 nanotube arrays (Ti3+/TiO2-NTA) anode, showing high efficiency and low energy consumption compared to traditional methods. The possible degradation mechanism of PFOA involved enhanced oxidation through direct electron transfer on the anode, leading to rapid mineralization into CO2 and F-.
Article
Chemistry, Physical
Min Cheng, Shuxia Bai, Yanze Xia, Xun Zhu, Rong Chen, Qiang Liao
Summary: The composite photocatalyst of CdS/ZnS quantum dots sensitized TiO2 nanotube array exhibited high performance for photocatalytic conversion of CO2 to methanol under visible light, with the product yield varying with different CO2 flow rates and light intensities.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Hui-xian Wei, Yan-wei Jiang, Qiang Zhang, Cheng-hao Mo, Dong-yin Liu
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2018)
Article
Chemistry, Multidisciplinary
Huixian Wei, Tongjun Wang, Qiang Zhang, Yanwei Jiang, Chenghao Mo
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2020)