Graphene oxide was prepared by an improved Hummers method. The graphite oxide was removed by ultrasonic stripping and the composite was prepared. The composites were characterized by SEM, EDX, XRD, TEM, XPS, FT-IR and UV–Vis. Using Rhodamine B as degradation material, the precursor body fluid was synthesized by hydrothermal method at pH = 7, hydrothermal reaction temperature 180 °C and reaction time 8 h. The prepared Bismuth vanadate sample showed the best degradation effect, the highest photocatalytic activity, and the best performance of Bismuth vanadate doped with different amounts of graphene. The degradation rate of RhB dye by 3%GO/BiVO reached the maximum 94.25%. The photocatalytic reaction kinetics analysis showed that the degradation of RhB dye in all samples was consistent with the first order reaction kinetics equation, and the degradation degree of 3%GO/BiVO was about 5.3 times that of pure BiVO. The stability and reusability of the catalyst were evaluated through the photocycle stability experiment. With the gradual increase of The Times of catalyst use, the catalytic degradation effect of the catalyst on the simulated dye wastewater gradually weakened.

中文翻译：

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钒酸铋/石墨烯纳米复合材料的光催化降解

采用改进的Hummers法制备氧化石墨烯。通过超声波剥离去除氧化石墨，制备复合材料。通过 SEM、EDX、XRD、TEM、XPS、FT-IR 和 UV-Vis 对复合材料进行了表征。以罗丹明B为降解材料，在pH=7、水热反应温度180℃、反应时间8h的条件下，采用水热法合成前体体液。制备的钒酸铋样品显示出降解效果最好、光催化活性最高、掺杂不同量石墨烯的钒酸铋性能最好。3%GO/BiVO对RhB染料的降解率达到最大94.25%。光催化反应动力学分析表明，所有样品中RhB染料的降解均符合一级反应动力学方程，3%GO/BiVO的降解程度约为纯BiVO的5.3倍。通过光循环稳定性实验评价了催化剂的稳定性和重复使用性。随着催化剂使用次数的逐渐增加，催化剂对模拟染料废水的催化降解效果逐渐减弱。