Significantly enhanced photothermal catalytic CO2 reduction over TiO2/g-C3N4 composite with full spectrum solar light

被引:41
作者
Bao, Xiaoyan [1 ]
Lu, Dawei [1 ]
Wang, Zining [2 ]
Yin, Hao [1 ]
Zhu, Biao [1 ]
Chen, Bin [1 ]
Shi, Meixiang [1 ]
Zhang, Yang [1 ]
Xu, Qianxin [1 ]
Qin, Yumei [1 ]
Shen, Xing -Can [1 ]
Wu, Kai [2 ]
机构
[1] Guangxi Normal Univ, Sch Chem & Pharmaceut Sci, State Key Lab Chem & Mol Engn Med Resources, Guilin 541004, Peoples R China
[2] Peking Univ, Coll Chem & Mol Engn, BNLMS, Beijing 100871, Peoples R China
基金
中国国家自然科学基金;
关键词
CO2; reduction; Photothermal catalysis; Heterojunction; Full solar spectrum; GRAPHITIC CARBON NITRIDE; CONVERSION; G-C3N4; TIO2; MODULATION; DEFECTS;
D O I
10.1016/j.jcis.2023.01.096
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Using solar energy to drive catalytic conversion of CO2 into value-added chemicals has great potential to alleviate the global energy shortage and anthropogenic climate change. Herein, a "hitting three birds with one stone" strategy was reported to prepared boron-doped g-C3N4/TiO2-x composite (BCT) by a one-step thermal reduction process. A series of characterizations showed that the composite catalyst has extended full-spectrum absorption, rapid photogenerated charge separation, and outstanding CO2 photoreduction performance (265.2 lmol g-1h-1), which is 7.5 and 9.2 times higher than that of pure TiO2 and g-C3N4, respectively. In addition, the CO2 conversion rate can be further increased to 345.1 lmol g-1h-1 at 70 degrees C due to its excellent photothermal conversion. Mechanistic studies reveal that synergistic effects alter the charge density distribution, thereby lowering the energy barrier for CO2 conversion by adsorbing and activating CO2 molecules. This work provides a novel three-in-one integrated strategy for fabricating high-efficiency catalysts. (c) 2023 Elsevier Inc. All rights reserved.
引用
收藏
页码:63 / 75
页数:13
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