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首页> 外文期刊>RSC Advances >Highly improved visible-light-induced photocatalytic performance over BiOI/Ag2CO3 heterojunctions
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Highly improved visible-light-induced photocatalytic performance over BiOI/Ag2CO3 heterojunctions

机译：大大改善了BiOI / Ag 2 CO 3 异质结上可见光诱导的光催化性能

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摘要

A novel BiOI/Ag2CO3 composite was synthesized through the co-precipitation method and well characterized by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, UV-vis diffuse reflectance spectroscopy and photoluminescence spectroscopy. Its photocatalytic activity was evaluated for degrading various pollutants (rhodamine B, methylene blue, methyl orange) and phenol aqueous solution. Experimental results indicated that Ag2CO3 nanoparticles anchored on the BiOI sheet surface promoted the enhanced photocatalytic activity. Moreover, when the mass ratio of BiOI in BiOI/Ag2CO3 composites was 20%, the as-prepared BiOI/Ag2CO3 (20 wt%) composite exhibited the optimal photocatalytic activity for degrading rhodamine B; its rate constant was approximately 6.75 and 4.3 times higher than the separate BiOI and Ag2CO3. The enhanced photocatalytic performance could be attributed to the heterojunctions between BiOI and Ag2CO3. Furthermore, the possible mechanism for photodegradation over the BiOI/Ag2CO3 composite is proposed.
机译：通过共沉淀法合成了新型的BiOI / Ag 2 CO 3 复合材料，并通过X进行了表征射线衍射，傅里叶变换红外光谱，X射线光电子光谱，扫描电子显微镜，透射电子显微镜，能量色散X射线光谱，UV可见漫反射光谱和光致发光光谱。评价其光催化活性以降解各种污染物（若丹明B，亚甲基蓝，甲基橙）和苯酚水溶液。实验结果表明，锚固在BiOI片材表面的Ag 2 CO 3 纳米颗粒具有增强的光催化活性。另外，BiOI / Ag 2 CO 3 复合材料中BiOI的质量比为20％时，制备的BiOI / Ag 2 CO 3 （20 wt％）复合材料表现出最佳的光催化降解罗丹明的活性B;其速率常数分别约为BiOI和Ag 2 CO 3 的6.75和4.3倍。 BiOI与Ag 2 CO 3 之间的异质结是光催化性能增强的原因。并提出了BiOI / Ag 2 CO 3 复合材料光降解的可能机理。

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