文献类型：期刊文献

英文题名：One-pot hydrothermal preparation of Ni and I co-doped brookite-anatase TiO2 nanoparticles with remarkably enhanced photoreduction activity of CO2 to CH4

作者：Shi, Weina[1];Zhang, Ran[1];Wang, Ji-Chao[2];Li, Wei[2];Guo, Xiaowei[1];Guo, Jiao[1];Li, Renlong[2];Hou, Yuxia[2];Zhang, Wanqing[2];Gao, Hui -Ling[2]

第一作者：史维娜

通讯作者：Wang, JC[1];Li, RL[1];Gao, HL[1]

机构：[1]Xinxiang Univ, Coll Chem & Chem Engn, Jinsui Rd 191, Xinxiang 453003, Peoples R China;[2]Henan Inst Sci & Technol, Coll Chem & Chem Engn, Xinxiang 453000, Peoples R China

第一机构：新乡学院化学化工学院

通讯机构：[1]corresponding author), Henan Inst Sci & Technol, Coll Chem & Chem Engn, Xinxiang 453000, Peoples R China.

年份：2024

卷号：429

外文期刊名：JOURNAL OF CATALYSIS

收录：;EI(收录号：20234915185726);Scopus(收录号：2-s2.0-85179101438);WOS:【SCI-EXPANDED(收录号:WOS:001134328600001)】；

基金：This work was supported by National Natural Science Foundation of China (No. 51802082), Program for Science & Technology Innovation Talents in Universities of Henan Province (No. 21HATIT016), Key Scientific Research Project of Henan Provincial Education Department (No. 24B430016), Key Scientific and Technological Project of Henan Province (No. 232102321028, 232102230117 and 232102230028), the Key Project of Science and Technology Program of Xinxiang City (No. GG2021005), College Students' Innovation and Entrepreneurship Training Program of Henan Institute of Science and Technology (No. 2023CX020) and Open Fund of the State Key Laboratory of Luminescent Materials and Devices (South China University of Technology) (No. 2022-skllmd-25).

语种：英文

外文关键词：CO 2 reduction; Selectivity; Photocatalyst; Co -doping; Phase -junction

摘要：Ni and I co-doped TiO2 nanoparticles with mixed anatase-brookite phase (Ni/I-TiO2) were synthesized by the hydrothermal-calcination method for photocatalytic CO2 reduction with H2O vapor. The I and Ni co-doping, anatase-brookite phase junction, as well as the presence of Ti(III) and Ni(III) endowed the catalyst with promoted visible light absorption, increased reduction ability of photogenerated electrons, facilitated charge separation and migration along with modulated CO2 adsorption mode and capacity, ultimately resulting in boosted photocatalytic activity and product selectivity as compared with those of pure TiO2. The CO, CH4 and O2 yields of the optimized Ni/I-TiO2 reached 3.49, 158.25 and 246.30 mu mol/gcat after 15 h of light illumination, which decreased slightly after 9 cycles, and the product selectivity was above 98 % for photocatalytic reduction of CO2 to CH4 with Ni and I co-doping. The in-situ FTIR results with the observation of center dot CH3O and center dot CH3 intermediates confirmed CH4 formation, and the possible mechanism of photocatalytic CO2 reduction over Ni/I-TiO2 was elucidated. This work provides new insights to pursue efficient catalysts for the selective photocatalytic CO2 reduction to CH4.