Nitrogen defects/boron dopants engineered tubular carbon nitride for efficient tetracycline hydrochloride photodegradation and hydrogen evolution

Zhang, Jinqiang ¹Ao, Zhimin ²Zhao, Chaocheng ³Li, Bin ⁴Wang, Shuaijun ⁴Wang, Shaobin ⁵Sun, Hongqi ¹Chen, Lin ³Wang, Yixuan ³Cheng, Shuai ³Zhao, Xiaoli¹

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作者信息

1. Edith Cowan Univ
2. Guangdong Univ Technol
3. China Univ Petr East China
4. Jiangsu Univ
5. Univ Adelaide
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Abstract

Polymeric carbon nitride (g-C3N4) exhibits only mediocre catalytic activity in photocatalytic environmental remediation and energy conversion because of its limited light absorption and sluggish charge transfer. Herein, we assembled novel, tubular carbon nitride (D-TCN450) with nitrogen defects/boron dopants via a self-supramolecular reaction and NaBH4 thermal reduction approach. Advanced characterization results suggested that introducing the nitrogen defects/boron dopants can effectively promote light trapping, charge separation, and valance-band downshift. Density functional theory and electron spin resonance results further proved that the fusion of cyano groups (nitrogen defects) into the framework of D-TCN450 can facilitate oxygen adsorption to form superoxide radicals. As a result, D-TCN450 exhibited dramatically improved photocatalytic hydrogen evolution and photodegradation of tetracycline hydrochloride at a 4- and 9-fold enhancement compared to pristine g-C3N4, respectively. This integrated engineering strategy might provide a unique paradigm for the rational design of novel photocatalysts for sustainable remediation and energy innovation.

Key words

Tubular carbon nitride/Defects/dopants engineering/Photocatalysis/Tetracycline hydrochloride/Hydrogen evolution/POROUS G-C3N4/H-2 EVOLUTION/WATER/PHOTOCATALYSTS/DEGRADATION/PHOTOOXIDATION/NANOSTRUCTURE/CONSTRUCTION/NANOSHEETS/TUBES

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量101

参考文献量67

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