Article
Chemistry, Physical
Yifan Wang, Xiangyu Meng, Qiyu Hu, Meiyu Zhang, Xiaohu Cao, Chunjiang Xu, Yong Ding
Summary: The combination of Ti3+ doped TiO2-x with ZnIn2S4 resulted in a novel photocatalyst with improved hydrogen evolution reaction (HER) performance compared to TiO2-x alone. The formation of a Type II heterojunction enhanced the separation of photogenerated carriers and electron transfer rate, leading to higher hydrogen evolution rate.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Jiawei Zhao, Bin Wang, Yaru Zhao, Mingming Hou, Changhui Xin, Qian Li, Xin Yu
Summary: This study aims to fabricate self-doped Ti3+-TiO2 microspheres and dye sensitized self-doped Ti3+-TiO2 composites with high surface areas and visible-light absorption for highly enhanced photocatalytic tetracycline degradation under visible-light irradiation. The experimental results showed that the obtained Ti3+-TiO2 microspheres showed enhanced visible-light capture capacity and a larger surface area. Besides, the obtained Eosin Y/Ti3+-TiO2 composites showed efficient visible-light absorption and highly boosted photocatalytic performance towards tetracycline degradation. The highest rate constant for Eosin Y/Ti3+-TiO2-9% composite reached as high as 0.06657 min-1, approximately 8.09 times that of commercial TiO2, strongly demonstrating the significant roles of dye sensitization. Finally, a reasonable dye sensitization visible-light photocatalytic mechanism was suggested.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Nanoscience & Nanotechnology
Mariam Barawi, Miguel Garcia-Tecedor, Miguel Gomez-Mendoza, Giulio Gorni, Marta Liras, Victor A. de la Pena O'shea, Laura Collado
Summary: Photocatalytic nitrogen fixation to ammonia and nitrates is a promising sustainable route. This study modified the TiO2 framework via aliovalent molybdenum doping to enhance the photocatalytic performance. Aqueous-dispersed colloidal semiconductor nanocrystals (NCs) with precise morphological control and better carrier mobility were used. The Mo-TiO2 NCs functionalized with charged hydroxyl groups showed simultaneous production of ammonia, nitrites, and nitrates in water. Mo-doping and nanostructuration significantly improved the overall N-2 fixation performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Mengnan Nie, Chao Zhou, Weiwei Feng, Changhui Xin, Xin Yu, Qian Li
Summary: Self-doped Ti3+-TiO2 and amorphous ZnS layers-coated Ti3+-TiO2 nanostructures were successfully synthesized for organic pollutant degradation under visible-light illumination. The Ti3+-TiO2 clusters exhibited efficient visible-light absorption and photocatalytic performance, while the amorphous ZnS layers greatly enhanced the charge separation between ZnS layers and self-doped Ti3+-TiO2 clusters. The Ti3+-TiO2@ZnS-15% heterojunction showed the highest photocatalytic activity, approximately 9.87 times that of commercial TiO2, and also exhibited enhanced performance in degrading ciprofloxacin and tetracycline under visible-light illumination.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Engineering, Environmental
Alejandro Bembibre, Majdi Benamara, Mokhtar Hjiri, Elvira Gomez, Hatem R. Alamri, Ramzi Dhahri, Albert Serra
Summary: The study explores the efficient mineralization of tetracycline antibiotics using Ca-doped ZnO nanopowders under LED visible light and ultrasound irradiation. The catalyst exhibited high efficiency, reusability, and minimal sonophotocorrosion, especially in natural waters' pH range.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Xin Yu, Jielin Huang, Jingjing Zhao, Shuaifei Liu, Dandan Xiang, Yanting Tang, Juan Li, Quanhui Guo, Xinqi Ma, Junwei Zhao
Summary: Efficient visible light photocatalytic elimination of pharmaceutical factory wastewater was achieved by introducing hybrid Ag/AgCl nanoparticles into Ti3+ self-doped TiO2 mesocrystals. The Ag/AgCl@Ti3+-TiO2 mesocrystals showed superior performance in degrading tetracycline under visible light, mainly attributed to the continuous attacks of photo-generated holes and radicals on tetracycline molecules.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Lu Xu, Xiaojia Wei, Yabo Shang, Yuetong Qi, Juan Shi, Keqian Li, Xin Jin, Xue Bai, Xuan Shi, Pengkang Jin
Summary: A facile impregnation-calcination route was proposed for the synthesis of Fe3+-doped TiO2 anchored with FeQDs, with enhanced catalytic performance for the degradation of phenolic pollutants under visible light. The obtained FeQDs/TiO2-x exhibited quasi-full visible light absorption and improved charge separation and interfacial transport capacity. The mechanism of the enhanced photocatalytic activity was elucidated based on material characterization and degradation experiments. The results demonstrated the high potential of FeQDs/TiO2-x for wastewater treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Agata Kowalczyk, Bozena Zgardzinska, Karol Osipiuk, Katarzyna Jedruchniewicz, Katarzyna Tyszczuk-Rotko, Magdalena Gozdziuk, Haitao Wang, Bozena Czech
Summary: Water is essential for life on Earth, but the increasing global population has led to higher water consumption and increased production of wastewater. Current wastewater treatment techniques are not efficient enough to remove pharmaceuticals, highlighting the need for innovative approaches. This study investigates the photocatalytic oxidation of beta-blockers using modified TiO2 photocatalysts. The results show that solely relying on pollutant concentration reduction is insufficient for determining treatment method safety and additional ecotoxicity testing is necessary.
Article
Chemistry, Physical
Shuai Dong, Suhang Chen, Fangyuan He, Jiachen Li, Hui Li, Kangzhen Xu
Summary: A new N-TiO2-X/g-C3N4 (NTCN) composite with improved photocatalytic activity was successfully designed and constructed by co-doping N and Ti3+/Ov to reduce the band gap of TiO2. The composite showed significantly higher photocatalytic degradation rate of 2,4-dinitrophenylhydrazine (2,4-DNPH) under visible light irradiation compared to monomers and other composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Chemical
Ruiheng Liang, Zhongzheng Hu, Huizhong Wu, Shuaishuai Li, Xuyang Zhang, Omotayo A. Arotiba, Minghua Zhou
Summary: A novel Ti3+ self-doped and nitrogen-annealed TiO2 nanocone arrays (Ti3+-TiO2NCs(N2)) photoanode was prepared for efficient photoelectrocatalytic degradation of sulfamethazine (SMT) under visible light. The visible light harvesting and charge transfer of TiO2 nanocones were significantly improved after nitrogen annealing treatment. The introduction of Ti3+ sites lowered charge transport resistance and introduced a new impurity energy level, resulting in accelerated transmission of photogenerated carriers and enhanced degradation of pollutants.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Cheng Liu, Yao Qin, Wei Guo, Yingzhang Shi, Zhiwen Wang, Yan Yu, Ling Wu
Summary: This study investigated the performance of different morphologies of nano-TiO2 in visible-light-driven photocatalytic selective oxidation of benzylamine. The porous structure of TiO2 demonstrated superior photocatalytic performance due to possessing more active sites. Coordinatively unsaturated Ti atoms can chemisorb and activate benzylamine molecules, while oxygen vacancies can activate oxygen molecules to form reactive oxygen species.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Xinghui Liu, Ruinian Hua, Jinhai Niu, Zhenyi Zhang, Jialiang Zhang
Summary: The photocatalytic activity of Titanium dioxide nanosheets (TiO2 NFs) can be enhanced by N-2 plasma treatment, leading to more oxygen vacancy and Ti3+ ions in the N-TiO2 NFs. The Ti3+ self-doped system formed by Ti3+ ions increases the light absorption range, resulting in a 14.85 times higher catalytic H-2 evolution rate in N-TiO2 NFs compared to pristine TiO2 NFs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Yuwei Wang, Kelin Xu, Liquan Fan, Yongwang Jiang, Ying Yue, Hongge Jia
Summary: Black TiO2 with abundant oxygen vacancies (OVs)/B-doped graphitic carbon nitride (g-C3N4) Z-scheme heterojunction nanocomposites were prepared by a one-pot strategy. The OVs enhance photogenerated carrier separation and the sorption and activation of antibiotic compounds (tetracycline hydrochloride, TC). The prepared heterojunction photocatalysts with a narrow bandgap of similar to 2.13 eV exhibit excellent photocatalytic activity for the degradation of tetracycline hydrochloride (65%) under visible light irradiation within 30 min, which is several times higher than that of the pristine one. The outstanding photocatalytic property can be attributed to abundant OVs and B element-doping reducing the bandgap and extending the photo-response to the visible light region, the Z-scheme formation of heterojunctions preventing the recombination of photogenerated electrons and holes, and promoting their effective separation.
Article
Chemistry, Physical
Yan Chen, Ao Li, Xiuli Fu, Zhijian Peng
Summary: This study proposes a simple and feasible method for preparing titanium oxide photocatalysts with reduced band gap, high electrical conductivity, and good chemical and structural stability. By co-doping N and F and oxygen deficiency, the visible light absorption and photocatalytic activity can be significantly enhanced. This work provides an important method for designing and fabricating high-performance titanium oxide photocatalysts.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Lantian Chang, Noman Ahmad, Ganning Zeng, Ajay Ray, Yan Zhang
Summary: The novel carbon quantum dots (CQDs) sensitized TiO2 composite, N, S-CQDs/TiO2, showed efficient reduction of Cr (VI) under visible light irradiation. Lower pH and initial concentration of Cr (VI) led to higher reduction efficiency, with the composite achieving a four-fold increase in reduction efficiency compared to pure TiO2. Additionally, the composite demonstrated good reusability and stable photocatalytic performance in real water samples. This study confirms that sensitization of TiO2 with CQDs broadens its light absorption range, expanding its application in visible-light-driven photocatalysis.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
