带隙
材料科学
无定形固体
光催化
辐照
光电子学
半导体
降级(电信)
高分辨率透射电子显微镜
密度泛函理论
可见光谱
紫外线
航程(航空)
光化学
化学工程
纳米技术
化学
计算化学
催化作用
结晶学
复合材料
物理
透射电子显微镜
核物理学
工程类
电信
生物化学
计算机科学
作者
Huan‐Chün Wang,Zheng Xie,Xuanjun Wang,Ying Jia
出处
期刊:Catalysts
[MDPI AG]
日期:2020-04-09
卷期号:10 (4): 413-413
被引量:14
标识
DOI:10.3390/catal10040413
摘要
Photocatalysts with a superior activity range, from ultraviolet (UV) to near-infrared (NIR) light, are attractive for solar utilization. From this perspective, sulfides are promising due to their narrower bandgap than oxides. In this report, NaBiS2 was synthesized hydrothermally under mild conditions by adjusting the alkaline amount. The rough NaBiS2 nanosheets possessed various surface atomic configurations on their surfaces, including amorphous clusters and amorphous nano-domains, revealed by HRTEM. A theoretical investigation of the band structure employing the density functional theory (DFT) method for the first time indicated that NaBiS2 is an indirect bandgap semiconductor with a narrow bandgap of 1.02 eV. Experimentally, it showed excellent photocatalytic activity for the degradation of methyl blue under UV, visible light and NIR light due to its experimental bandgap width of 1.32 eV. A degradation rate of 99.6% was reached after 80 min under full spectrum irradiation.
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