Revealing the synergistic effect of bulk and surface co-doped boron on TiO2 for enhanced photocatalytic H2 evolution

被引：0

作者：

Li, Bo ^{[1
]}

Zheng, Hongshun ^{[1
,2
]}

Zhou, Tong ^{[1
]}

Zi, Baoye ^{[1
]}

Lu, Qingjie ^{[1
]}

Li, Dequan ^{[1
,2
]}

Zhang, Mao ^{[1
]}

Qiu, Zhishi ^{[1
]}

Luo, Zhongge ^{[1
]}

Zhang, Yumin ^{[1
]}

Xiao, Bin ^{[1
]}

Chen, Mingpeng ^{[1
]}

Zhang, Jin ^{[1
]}

Sun, Huachuan ^{[1
]}

Zhao, Jianhong ^{[1
]}

He, Tianwei ^{[1
]}

Zhu, Zhongqi ^{[1
]}

Zhang, Genlin ^{[1
]}

Zhang, Yuxiao ^{[1
]}

Liu, Qingju ^{[1
,2
]}

机构：

[1] Yunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Institute of International Rivers and Eco-security, Yunnan University, Kunming,65

[2] Southwest United Graduate School, Kunming,650091, China

来源：

Chemical Engineering Journal | 1600年 / 497卷

关键词：

Boron(B) doping is considered as a promising modification method for TiO2 photocatalyst due to the facilitation of separation and migration of photogenerated carriers. However; the modification mechanisms of bulk or surface doping modes on photocatalyst are controversial; and the catalytic activity still needs to be improved. Here; a bulk and surface B co-doped TiO2 (B(B&S)-TiO2) derived from B-containing Ti-MOF (MIL-125(B)) precursor was demonstrated; which achieved a H2 evolution rate of 9.56 mmol∙g−1∙h−1 under 365 nm light without co-catalyst. Detailed investigations reveal the synergistic effect between bulk and surface co-doped B; which optimizes the microstructure; activates the 3-coordinated O (O3C) atoms of B-Ti-O structural units as active sites; enhances the transfer of photoelectrons and inhibits the recombination; balances H* adsorption–desorption during the photocatalytic reactions. This work exhibits a novel strategy of bulk and surface B co-doped photocatalysts and highlights the potential for achieving high photocatalytic H2 evolution rate without co-catalyst. © 2024;

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摘要：

Journal article (JA)

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