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A new catalyst with the superior performance for treatment of water polluted by anthraquinone compounds
Bulletin of Materials Science ( IF 1.8 ) Pub Date : 2021-07-27 , DOI: 10.1007/s12034-021-02504-4
Miloš Kostić 1 , Slobodan Najdanović 1 , Miljana Radović Vučić 1 , Nena Velinov 1 , Danijela Bojić 1 , Aleksandar Bojić 1 , Goran Nikolić 2
Affiliation  

Bismuth tartrate (BiT) is successfully synthesized by the sol–gel method. The photocatalytic performance was evaluated by decolourization of anthraquinone-based Reactive Blue 19 (RB19) dye that represents a model of organic pollutant. The X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and energy-dispersive X-ray spectroscopy were used to determine the properties and structures of the BiT. The BiT has a smooth surface without pores, which is confirmed by BET analysis. The specific surface area is not large for BiT, with value of 23.7 m2 g−1. BiT shows very high decolourization efficiency at optimal conditions: the photocatalyst dose of 0.50 g dm−3 at pH 2.0 and the stirring rate of 250 rpm. Increasing of UV light intensity leads to increase of decolourization rate. The decolourization of RB19 follows the Langmuir-Hinshelwood and pseudo-first-order kinetics. The chemical oxygen demand analysis shows the ability of catalyst to completely mineralize RB19. Also, BiT photocatalyst exhibits remarkable stability and recyclability under applied conditions in five consecutive catalytic cycles. The decolourization efficiency remains around 93%, which means that BiT has good potential to be applied as a very efficient catalyst.



中文翻译:

一种性能优越的新型蒽醌类化合物污染水处理催化剂

通过溶胶-凝胶法成功合成了酒石酸铋(BiT)。通过代表有机污染物模型的蒽醌基活性蓝 19 (RB19) 染料的脱色来评估光催化性能。X射线衍射、傅里叶变换红外光谱、扫描电子显微镜和能量色散X射线光谱被用来确定BiT的性质和结构。BET 分析证实了 BiT 表面光滑无孔。BiT的比表面积不大,值为23.7 m 2  g -1。BiT 在最佳条件下显示出非常高的脱色效率:光催化剂剂量为 0.50 g dm -3在 pH 2.0 和 250 rpm 的搅拌速度下。增加紫外光强度导致脱色率增加。RB19 的脱色遵循 Langmuir-Hinshelwood 和伪一级动力学。化学需氧量分析显示了催化剂完全矿化 RB19 的能力。此外,BiT 光催化剂在连续五个催化循环的应用条件下表现出显着的稳定性和可回收性。脱色效率保持在 93% 左右,这意味着 BiT 具有作为非常有效的催化剂应用的良好潜力。

更新日期:2021-07-27
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