Article
Chemistry, Physical
Longxiao Yang, Ningdong Feng, Feng Deng
Summary: In this study, Al-doped TiO2 photocatalysts with optimized {001} facet structure were prepared, showing significantly enhanced photocatalytic performance. The formation of F-Ti2Al structure was confirmed by NMR and ESR experiments, and it was identified as the active site responsible for the improved photocatalytic performance.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Yiqing Wu, Feng Gao, Huamin Wang, Libor Kovarik, Berlin Sudduth, Yong Wang
Summary: This study investigates the surface acid-base properties of anatase TiO2 nanomaterials with {101} and {001} facets via methanol titrations. It was found that adsorption and desorption of methanol differ significantly between TiO2(101) and TiO2(001), with surface defects playing an important role in the reaction process.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Saif M. H. Qaid, Hamid M. Ghaithan, Huda S. Bawazir, Abrar F. Bin Ajaj, Khulod K. AlHarbi, Abdullah S. Aldwayyan
Summary: This study aims to synthesize various TiO2 nanocrystals, including nanosheets, nanorods, and nanoparticles, using a rapid hydrothermal method. The synthesized TiO2 nanocrystals exhibit high purity and exposed high-energy facets, resulting in high reactivity and large surface area. The {001} facets dominate in the nanosheets and nanorods, accounting for approximately 80% and 85% of the outer surface area, respectively.
Article
Chemistry, Inorganic & Nuclear
Jinyu Bao, Wei Quan, Yunqi Ning, Hanbing Wang, Qun Wei, Lingzhi Huang, Weijin Zhang, Yongxiang Ma, Xiaoying Hu, Hongwei Tian
Summary: A series of LaNi1-xFexO3/g-C3N4 heterojunction photocatalysts were prepared by a simple wet chemical method and their structural, morphological, optical, electrochemical properties, as well as their photocatalytic degradation performance for tetracycline and Cr(VI), were investigated. The LaNi0.8Fe0.2O3/g-C3N4 composite photocatalysts exhibited excellent photocatalytic performance due to the synergy of doping and constructing heterojunctions. Doping of Fe ions increased the concentration of oxygen vacancies, favoring the formation of electron traps, while the type-II heterojunction formed between LaNi0.8Fe0.2O3 and g-C3N4 effectively enhanced the separation and transfer of photoinduced carriers, thereby promoting photocatalytic activity. The LaNi0.8Fe0.2O3/g-C3N4 photocatalyst showed long-term stability after three cycles of use, and a photocatalytic mechanism was proposed.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Qiao Tang, Jiang Wu, Donghoon Kim, Carlos Franco, Anastasia Terzopoulou, Andrea Veciana, Josep Puigmarti-Luis, Xiang-Zhong Chen, Bradley J. Nelson, Salvador Pane
Summary: Piezocatalysis has gained attention for its potential in addressing energy shortages and environmental pollution. However, its efficiency is limited. Researchers successfully synthesized BaTiO3 nanosheets with exposed polar facets to enhance piezocatalytic activity. The nanosheets exhibited superior degradation rate of organic pollutants and hydrogen production capability, providing a new strategy for designing high-performance piezocatalysts.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Deshou Zhang, Hang Yao, Ziliang Zheng, Feng Hu, Min Wu, Zhongfu Li, Shumin Zhang, Kaiqiang Xu, Shiying Zhang, Zhaohui Wu
Summary: Bismuth-rich Bi4O5I2 nanosheets were successfully prepared through progressive hydrolysis of urea in ethylene glycol solvent, and the urea concentration played a key role in promoting the formation of nanosheets. The resulting Bi4O5I2 nanosheets exhibited a more negative conductive band level, showing superior visible-light photocatalytic activity.
Article
Chemistry, Multidisciplinary
Xiaofan Xiang, Laiyan Wu, Junjiang Zhu, Jiazhou Li, Xi Liao, Hongcheng Huang, Jiajie Fan, Kangle Lv
Summary: The study successfully degraded sulfadiazine (SDZ), a typical sulfonamides antibiotic, using photocatalytic oxidation technology. It was found that TiO2 nanosheets exhibited better photoreactivity towards SDZ degradation. The research also revealed the possible degradation pathways of SDZ and the promising application prospects of TiO2-NSs in removing SDZ.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Physical
Jun Wang, Bingqi Wang, Wenli Zhang, Yan Xiao, Haiqing Xu, Yan Liu, Zhanchao Liu, Jianming Zhang, Yinhua Jiang
Summary: A novel visible-light-driven SnIn4S8 nanosheet/TiO2 hollow sphere heterojunction with intimate contact structure was successfully constructed by hydrothermal process. The SISTOHS heterostructures exhibited outstanding photocatalytic performance and the optimized sample SISTOHS2 showed the highest photodegradation and photoreduction efficiencies. The rate constants of photodegradation and photoreduction over SISTOHS2 were significantly higher than those of the control samples. The systemic characterizations revealed that the improvement of photocatalytic performance was attributed to the double-shell interface, which enhanced the interaction between SnIn4S8 and TiO2, as well as the increased visible light harvesting ability and abundant reactive sites.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Zhuhuan Jiang, Haitao Zhu, Wanmi Guo, Qifang Ren, Yi Ding, Shaohua Chen, Jing Chen, Xinyu Jia
Summary: A new ternary composite material, Ag3VO4/g-C3N4/diatomite, was synthesized and studied for its performance in photocatalytic reduction of Cr(vi). The results showed a significant enhancement in degradation efficiency under visible light irradiation. Furthermore, cyclic degradation testing revealed the composite material's stable performance.
Article
Environmental Sciences
Jin-Chung Sin, Sze-Mun Lam, Honghu Zeng, Hua Lin, Haixiang Li, Liangliang Huang, Kai-Onn Tham, Abdul Rahman Mohamed, Jun-Wei Lim
Summary: In this study, a new type of nanocomposite with a heterojunction interface was successfully developed for the synchronous photocatalytic decomposition of organic contaminants and heavy metals. The nanocomposites exhibited improved performance due to the facilitated charge migration and accelerated charge carrier separation. The harmful substances were photodegraded and photoreduced, and the nanocomposites showed promising potential for practical applications in environmental remediation.
ENVIRONMENTAL RESEARCH
(2022)
Article
Nanoscience & Nanotechnology
Yin Peng, Nannan Zhao, Jinyun Liu
Summary: A BiOCl nanoring with co-exposed (110)/(001) facets was prepared using a selective etching mechanism. It demonstrated high photocatalytic performance towards organic dyes, degrading substances like butyl rhodamine B and methyl orange. The enhanced performance was attributed to the formation of type-II junctions between different crystal facets, leading to a sevenfold increase in reaction rate constant compared to BiOCl nanosheets.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Lan Jiang, Gongbing Zhou
Summary: The study revealed that the interaction between Ru nanoparticles and TiO2 crystal surfaces in Ru/ATCs catalysts contributes to enhancing activity and selectivity in benzene semi-hydrogenation reactions. Among different support facets, Ru/ATCs-101 showed the lowest density of coordinatively unsaturated atoms and exhibited the best catalytic performance.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Zhaohui Wu, Jie Shen, Nan Ma, Zhongfu Li, Min Wu, Difa Xu, Shiying Zhang, Wenhui Feng, Yongfa Zhu
Summary: Enhancing spatial charge separation efficiency through directional charge transfer in Bi4O5Br2 nanosheets with vertically aligned facets significantly improves the visible-light photodegradation efficiency of BPA. This study provides new insights for the rational design of photocatalyst facets to effectively separate charge carriers and enhance photocatalytic performances.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Jingjing Xu, Yang Liu, Mindong Chen
Summary: SnNb2O6/MgIn2S4(SNO/MIS) heterojunction photocatalytic materials were fabricated using a handy in situ growth method, and their photocatalytic performance under visible light was investigated. The results showed that the SNO/MIS composites exhibited better photocatalytic activity and stability compared to the pure samples. The improved performance was attributed to the heterojunction structure formed by the close contact between SNO and MIS, which promoted carrier separation and inhibited the photocorrosion of MIS.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Cheng Yu, Lu Yu, Abdelkader Mohamed, Jun Fang, Yichao Wu, Ke Dai, Peng Cai, Qiaoyun Huang
Summary: Light irradiation affects the electron transfer between dissimilatory metal-reducing bacteria (DMRB) and semiconducting minerals, which has implications for the biogeochemical cycle of heavy metals. The reduction of Cr(VI) by Shewanella oneidensis MR1 (MR-1) was investigated in the presence of hematite nanoparticles, and it was found that the nanoparticles enhanced the reduction rate under visible light irradiation. Mutant strains experiments demonstrated the vital role of c-cytochrome for the conducting network established by MR-1 with hematite nanoparticles.
Article
Engineering, Environmental
Tao Zeng, Sijia Jin, Shuqi Li, Jiawen Bao, Zhiquan Jin, Da Wang, Feilong Dong, Haiyan Zhang, Shuang Song
Summary: This study demonstrates the precise tailoring of the electronic structure and surface chemistry of metal-free covalent triazine frameworks (CTFs) for efficient photoactivation of oxyanions. The incorporation of cyano (-CN) groups and boron (B) dopants in CTF-SD leads to enhanced optical absorption and oxidation capacity. The localized charge accumulation regions and electron-deficient areas in CTF-SD facilitate exciton dissociation and improve the affinity toward peroxymonosulfate (PMS) molecules, resulting in a 15-fold enhancement of bisphenol-A (BPA) removal compared to pristine CTF system.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Da Wang, Shiwen Dong, Hangkai Hu, Zhiqiao He, Feilong Dong, Juntao Tang, Xiaohui Lu, Lizhang Wang, Shuang Song, Jun Ma
Summary: Graphene nanoparticles (GNPs) were prepared through in situ pyrolysis method, and boron-doped GNPs (B-GNPs) exhibited more efficient catalytic ozonation for atrazine degradation. The study provides insights into the mechanism and application of heteroatom-doped carbonaceous catalysts for environmental remediation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Junjie Xu, Lun Lu, Chao Zhu, Qile Fang, Renlan Liu, Da Wang, Zhiqiao He, Shuang Song, Yi Shen
Summary: Solar energy is the most promising option for mitigating the energy crisis in the future, and can be used in renewable and economical technologies such as water splitting and pollutants degradation. This study investigates the enhancement of photocatalytic performance through defect engineering and the regulation of the conduction band position. The experimental results demonstrate that the material with 5% defects exhibits superior photocatalytic activity.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Environmental Sciences
Shuqi Li, Weishun Lai, Xinming Jiang, Yashuang Wang, Xinyi Cai, Da Wang, Shuang Song, Min Liu, Tao Zeng
Summary: A novel direct Z-scheme photocatalyst was prepared by hybridizing 0D MoS2 quantum dots and 3D honeycomb-like conjugated triazine polymers. The 0D/3D hierarchical structure and p-n junction significantly improved the photocatalytic activity and durability.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Environmental Sciences
Da Wang, Shiwen Dong, Siqi Fu, Yi Shen, Tao Zeng, Weiti Yu, Xiaohui Lu, Lizhang Wang, Shuang Song, Jun Ma
Summary: It is feasible to prepare reliable biochar catalysts for heterogeneous catalytic ozonation processes using inexpensive, high-quality, and easily available raw materials. A biochar catalyst rich in nitrogen and sulfur was prepared by pyrolyzing kelp. Acid-activated and base-activated kelp biochars had higher surface areas and more extensive porous structures, with base-activated biochar displaying effective ozone activation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Da Wang, Yinning He, Yi Chen, Fan Yang, Zhiqiao He, Tao Zeng, Xiaohui Lu, Lizhang Wang, Shuang Song, Jun Ma
Summary: In this study, a new type of hybrid material Mn-nCN, composed of manganese oxide (MnO) dispersed on carbon-nitrogen (CN) material, was fabricated as a catalyst for heterogeneous catalytic ozonation (HCO) and showed excellent catalytic performance in degrading refractory organic pollutants. The synergistic effects between MnO and CN, facilitated by the C-N-Mn and C-O-Mn bonds in the catalyst, overcome typical issues such as metal leaching, and promote redox reactions of Mn by promoting electron transfer from cation-pi reactions. The study also demonstrated the involvement of surface hydroxyl groups in ozone decomposition and reactive oxygen species (ROS) production.
Article
Engineering, Chemical
Da Wang, Zhe Yang, Yinning He, Shiwen Dong, Feilong Dong, Zhiqiao He, Xiaohui Lu, Lizhang Wang, Shuang Song, Jun Ma
Summary: This study investigated the reaction kinetics and degradation mechanisms of herbicides metribuzin (MTZ) and metamitron (MTT) during conventional and tourmaline-catalyzed ozonation processes. The tourmaline catalyst was characterized and its potential as a heterogeneous and green catalyst was evaluated. The results showed that catalytic ozonation was an effective way to degrade the refractory herbicides. The degradation products exhibited different toxicities, emphasizing the importance of examining the potential toxicities of derivatives formed during catalytic ozonation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Weiting Yu, Dezheng Yang, Rendan Zhu, Luzhen Liu, Yan Yu, Juntao Tang, Zhiqiao He, Jiexu Ye, Shuang Song
Summary: In this study, 2,6-diaminopyridine (2,6-DAP) was used for the first time to functionalize the electrode surface, resulting in a p-Si/Ag/2,6-DAP electrode with high activity and CO selectivity. The optimized potential for CO production was found to be -0.9 V vs RHE, with a Faradaic efficiency of 84.56%. A synergistic mechanism involving the reduction of CO2 by Ag and the adsorption of CO2 by 2,6-DAP was proposed to explain the enhanced catalytic performance of p-Si/Ag/2,6-DAP.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Environmental
Yinning He, Jiayi Li, Jingyu Tang, Haijun Cheng, Tao Zeng, Zhiqiao He, Da Wang, Lizhang Wang, Shuang Song, Jun Ma
Summary: In this study, N-doped Mn3O4 catalysts were synthesized and applied in heterogeneous catalytic ozonation. The Mn-N structures in the catalysts played a crucial role in facilitating the formation of electron-dense Mn sites, which served as the primary active sites for ozone activation. The catalysts demonstrated excellent performance in pyrazines degradation and odor elimination.
Review
Environmental Sciences
Da Wang, Ying Xing, Juan Li, Feilong Dong, Haijun Cheng, Zhiqiao He, Lizhang Wang, Stefanos Giannakis, Shuang Song, Jun Ma
Summary: This comprehensive study evaluates the effectiveness, mechanisms, and potential risks of direct ozonation processes and ozone-based AOPs in removing various odor compounds from drinking water sources. It also analyzes the impact of operational parameters on odor compound removal and introduces practical combined drinking water treatment methods incorporating ozone and other processes.
Article
Engineering, Environmental
Da Wang, Stefanos Giannakis, Jingyu Tang, Kai Luo, Juntao Tang, Zhiqiao He, Shuang Song, Lizhang Wang
Summary: In this study, magnetic reduced graphene oxide (rGO) encapsulated hexagonal FeTiO3 (FTO@rGO) nanosheets were synthesized for efficient degradation of venlafaxine (VLF) through photo-Fenton processes. The addition of rGO accelerated the migration of photo-generated electrons and improved the Fe2+/Fe3+ cycle, resulting in higher VLF degradation rate. The encapsulation of rGO also reduced Fe leaching and directed H2O2 activation at the FTO@rGO interface. By comprehensively analyzing intermediate products, the degradation pathway of VLF was determined.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Lei Lai, Juntao Tang, Jiaxin Zhu, Da Wang, Zhiqiao He, Shuang Song
Summary: A moisture-resistant TiO2-based catalyst has been successfully synthesized in this study, which shows higher activity and stability compared to commercial catalysts in the photocatalytic degradation of toluene. The modification of a hydrophobic F-doped carbon layer, incorporation of F into TiO2 crystals, and increased Ti3+ content contribute to the improved utilization of photoexcited charge carriers, enhanced toluene adsorption, and resistance towards water vapor.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Shiwen Dong, Xuan Liu, Xianxian Kong, Feilong Dong, Yan Yu, Lizhang Wang, Da Wang, Zhiqiao He, Shuang Song
Summary: Metal-organic frameworks (MOFs) and covalent organic frameworks (COFs) have been proven to be efficient catalysts for photocatalytic hydrogen evolution due to their tunable functionalities, permanent porosity, excellent visible light response, and physicochemical stability. In this study, a series of photocatalysts (NUBC) were prepared by loading different amounts of Zr-UiO-66-NH2 onto a benzoic acid-modified covalent triazine-based framework (BC). The resulting NUBC catalysts exhibited a type-II Z-scheme heterojunction structure formed via amide covalent bonds between NU and BC. The optimal loading of NU on BC was 30 wt.% (30NUBC), which showed a significantly higher photocatalytic H-2 evolution rate compared to NU and BC alone. The synergistic effect between the type-II Z-scheme heterojunctions and amide bonds contributed to enhanced visible light harvesting and improved charge transportation and separation. Furthermore, the NUBC catalysts showed excellent reusability and stability. Overall, this work provides insights into the design of novel MOF/COF hybrid materials and offers a systematic exploration of their photocatalytic H2 evolution properties.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
