High concentration of Ti^(3+)in C-TiO_(x)nanosheets boosting efficient photodegradation  

作　　者：Chongbei WU Xuan LI Haibin WANG Jiaxin TANG Shuai WEI Yuanyuan WU Aobing WANG Jizhou JIANG 

机构地区：[1]Hebei Key Laboratory of Man-machine Environmental Thermal Control Technology and Equipment,Hebei Vocational University of Technology and Engineering,Xingtai,054000,China [2]School of Materials Science and Engineering,Key Laboratory of Green Chemical Engineering Process of Ministry of Education,Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education,Wuhan Institute of Technology,Wuhan,430205,China

出　　处：《Science China(Technological Sciences)》2025年第3期156-166,共11页中国科学(技术科学英文版)

基　　金：supported by the Hebei Province Natural Science Foundation(Grant No.B2023108012);the Science Research Project of Hebei Education Department(Grant No.BJK2024137);the National Natural Science Foundation of China(Grant No.62004143);the Key R&D Program of Hubei Province(Grant No.2022BAA084);the S&T Program of Xingtai(Grant No.2023ZZ096)。

摘　　要：Semiconductor photocatalysis holds significant promise for addressing dye-pollution in water.However,the efficiency of photocatalytic water purification is constrained by the weak light absorption capacity and low active site distribution of photocatalysts.Utilizing a bottom-up approach,carbon-doped TiO_(x)(C-TiO_(x))nanosheets with high concentrations of Ti^(3+)active sites were fabricated by etching the Al element in Ti_(3)Ai C_(2)with H_(2)O_(2).Experimental evidence demonstrates that the optimal C-TiO_(x)nanosheets exhibit high activity for the photocatalytic degradation of methylene blue,achieving a degradation rate of 100%within 50 min.The introduction of carbon into the C-TiO_(x)nanosheets induces a red shift in the absorption edge,boosting the migration of photo-generated charge carriers.Moreover,there is a significant correlation between the concentration of Ti^(3+)active sites and the density of oxygen vacancies in the C-TiO_(x)nanosheets,which synergistically influence the photocatalytic degradation performance of MB dye wastewater.

关 键 词：bottom-up strategies C-TiO_(x)nanosheets high-concentrations Ti^(3+) photocatalytic degradation 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学] O644.1[理学—化学]