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首页> 外文期刊>RSC Advances >Hydrothermal synthesis of bismuth oxybromide-bismuth oxyiodide composites with high visible light photocatalytic performance for the degradation of CV and phenol
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Hydrothermal synthesis of bismuth oxybromide-bismuth oxyiodide composites with high visible light photocatalytic performance for the degradation of CV and phenol

机译：水热合成高可见光光催化性能的溴化铋-碘化铋铋复合材料降解CV和苯酚

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摘要

This is the first report on a series of BiOpBrq/BiOmIn heterojunctions that were prepared using controlled hydrothermal methods. The compositions and morphologies of the BiOpBrq/BiOmIn could be controlled by adjusting some growth parameters, including reaction pH value, temperature, time, and KBr/KI molar ratio. The photocatalytic efficiency of the powder suspensions was evaluated by measuring crystal violet (CV) and phenol concentrations. Both the photocatalytic process and the photosensitized process were found to work concurrently. The quenching effects of various scavengers and EPR indicated that the reactive O-2(center dot-) played a major role and (OH)-O-center dot and h(+) played minor roles. The photocatalytic activity of the BiOpBrq/BiOmIn heterojunctons reached the maximum rate constant of 0.5285 (or 0.4713) h(-1), 10 times higher than that of P25-TiO2, 14 times higher than that of BiOBr, and 6 times higher than that of BiOI.
机译：这是有关使用可控水热法制备的一系列BiOpBrq / BiOmIn异质结的首次报道。可以通过调节一些生长参数来控制BiOpBrq / BiOmIn的组成和形态，包括反应pH值，温度，时间和KBr / KI摩尔比。通过测量结晶紫（CV）和苯酚浓度评估了粉末悬浮液的光催化效率。发现光催化过程和光敏过程都同时起作用。各种清除剂和EPR的猝灭作用表明，反应性O-2（中心点-）起主要作用，（OH）-O-中心点和h（+）起次要作用。 BiOpBrq / BiOmIn异质结的光催化活性达到最大速率常数0.5285（或0.4713）h（-1），比P25-TiO2高10倍，比BiOBr高14倍，比BiOb高6倍。 BiOI。

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