可见光下氮化碳活化过硫酸钠降解罗丹明-B |
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引用本文: | 廖高祖,张静雯,邓达义,彭立斌,马传军.可见光下氮化碳活化过硫酸钠降解罗丹明-B[J].华南师范大学学报(自然科学版),2017,49(3):44-48. |
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作者姓名: | 廖高祖 张静雯 邓达义 彭立斌 马传军 |
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作者单位: | 1.1.华南师范大学化学与环境学院 |
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基金项目: | 石墨烯异质结增强光催化/臭氧耦合水处理技术的性能及机制研究 |
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摘 要: | 本文以尿素为原材料,高温聚合法制备了石墨相氮化碳(g-C3N4)纳米片催化剂,采用X射线衍射(XRD)、紫外可见漫发射(DRS)等对g-C3N4进行表征,研究了可见光下g-C3N4活化过硫酸钠对罗丹明-B的效果,并对降解过程中的影响因素如g-C3N4的投入量、过硫酸钠的投入量进行了考察. 结果表明:g-C3N4在可见光下协同过硫酸钠降解罗丹明-B的效果最佳,反应30分钟后,降解率达到91.67%. 罗丹明-B的降解效率随着g-C3N4和过硫酸钠投加量的增加而提高. 对反应过程中过硫酸钠浓度的滴定结果表明:g-C3N4在可见光下对过硫酸钠有一定的活化效果. 经过四次循环降解实验,g-C3N4催化剂仍然具有较好的活性.
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关 键 词: | 可见光 |
收稿时间: | 2015-10-12 |
Degradation of Rhodamine B by Carbon Nitride Activated Sodium Persulfate under Visible Light Irradiation |
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Abstract: | In this study, g-C3N4 is synthesized by direct calcination of urea. XRD, DRS was used to characterize its property. Degradation of Rhodamine B by g-C3N4 activated sodium persulfate under visible light is investigated. The dosage of g-C3N4, sodium persulfate in the degradation process was also studied. Results showed that 91.67% of RhB was degraded in 30 min by g-C3N4 activated sodium persulfate under visible light. A positive correlation existed between degradation ratio of RhB and amount of g-C3N4 or sodium persulfate. The results of titration experiment indicate that g-C3N4 is effective for activation of sodium persulfate under visible light. Moreover, g-C3N4 shows good stability after four cycle experiments. |
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