Molten-salt-chemistry-assisted synthesis of heterostructured g-C3N4/BiOI nanocomposites with enhanced sunlight absorption properties for efficient solar-to-chemical energy conversion

被引：5

作者：

Deng, Xinyue ^{[1
]}

Luo, Rui ^{[1
]}

Zhu, Gang ^{[1
]}

Shi, Xiangyang ^{[1
]}

Hao, Weiju ^{[1
]}

Fan, Jinchen ^{[1
]}

Bi, Qingyuan ^{[1
]}

Li, Guisheng ^{[1
]}

机构：

[1] Univ Shanghai Sci & Technol, Sch Mat & Chem, Shanghai 200093, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2024年 / 1009卷

基金：

中国国家自然科学基金;

关键词：

G-C3N4; nanosheets; BiOI; Heterojunction structure; Photocatalytic dye degradation; Solar-to-chemical energy conversion; REDUCTION; PHOTOCATALYSIS;

D O I：

10.1016/j.jallcom.2024.176910

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：

The g-C3N4 nanosheets coupled BiOI (g-C3N4/BiOI) nanocomposites with unique heterojunction structure and excellent wide-spectrum sunlight absorption properties have been developed via molten-salt-chemistry-assisted strategy. The heterostructured g-C3N4/BiOI shows enhanced solar to the thermal effect, improved electron mobility and carrier lifetime for efficient photocatalytic dye degradation. The engineered g-C3N4/BiOI catalyst exhibits outstanding photocatalytic activity for methyl orange (MO) removal with 100 % degradation conversion and excellent stability under solar light irradiation, which is respectively 2.69 and 1.27 times higher than those of g-C3N4 and BiOI counterparts. The broad scope toward other dyes degraded by g-C3N4/BiOI and the generality of the molten-salt-chemistry-assisted strategy for synthesizing g-C3N4/BiOCl and g-C3N4/BiOBr with considerable photodegradation efficiency are proved. The analysis of kinetic behaviors, electron spin resonance, and nanosecond transient absorption spectra for structure-activity relationship, key intermediate of center dot O-2(-) species, and excited state lifetime of g-C3N4/BiOI heterojunction material in the photocatalytic MO degradation processes are also demonstrated.

引用

页数：12

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