Fe_(3)O_(4)/g-C_(3)N_(4)复合异质结的构建及紫外光降解罗丹明B  

Preparation of Fe_(3)O_(4)/g-C_(3)N_(4)Composite Heterojunction and Its Photodegradation of Rhodamine B

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作  者:朱艳 刘海龙 贾仕奎 李云峰 首浩 ZHU Yan;LIU Hailong;JIA Shikui;LI Yunfeng;SHOU Hao(National&Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology,School of Materials Science and Enginee-ring,Shaanxi University of Technology,Hanzhong 723000,Shaanxi,China;Hanzhong First Adhesive Co.,Ltd.,Hanzhong 723000,Shaanxi,China)

机构地区:[1]陕西理工大学材料科学与工程学院,矿渣综合利用环保技术国家地方联合工程实验室,陕西汉中723000 [2]汉中第一粘合剂有限公司,陕西汉中723000

出  处:《材料导报》2024年第23期35-41,共7页Materials Reports

基  金:国家自然科学基金(52263004);陕西省自然科学基础研究项目(2021JM-486)。

摘  要:本工作通过热聚合法生成了g-C_(3)N_(4),溶剂热法合成了Fe_(3)O_(4),并用高温煅烧法制备一系列不同质量比的g-C_(3)N_(4)/Fe_(3)O_(4)复合光催化剂。利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、红外光谱仪(FTIR)、X射线光电子能谱仪(XPS)、荧光分光光度计对g-C_(3)N_(4)/Fe_(3)O_(4)复合材料的形貌、晶体结构、化学键结构以及荧光强度进行了表征;利用紫外-可见-近红外光谱仪对不同质量比g-C_(3)N_(4)/Fe_(3)O_(4)复合材料在250 W紫外灯照射下对罗丹明B降解情况进行测试,研究了不同质量比下复合材料的光催化活性,并对g-C_(3)N_(4)/Fe_(3)O_(4)最佳质量比(20/80)复合材料进行回收实验,测试其对罗丹明B的降解情况。结果表明:g-C_(3)N_(4)/Fe_(3)O_(4)最佳质量比(20/80)复合材料在2 h内对5 mg/L的罗丹明B的降解率可达到95.8%,回收五次后对罗丹明B的降解率依然能达到82.4%,表现出良好的光催化活性与催化稳定性。In this work,firstly,g-C_(3)N_(4)was obtained by thermal polymerization,and Fe_(3)O_(4)was synthesized by solvothermal method.Subsequently,a series of g-C_(3)N_(4)/Fe_(3)O_(4)composite photocatalysts were prepared by high-temperature calcination via changing the mass ratio.The morpho-logy,crystal structure,chemical bond structure and fluorescence intensity of g-C_(3)N_(4)/Fe_(3)O_(4)composites were characterized by scanning electron microscopy(SEM),X-ray diffractometer(XRD),infrared spectroscopy(FTIR),X-ray photoelectron spectroscopy(XPS),and fluorescence spectrophotometer.The degradation of rhodamine B via different mass ratios of g-C_(3)N_(4)/Fe_(3)O_(4)composites was tested by UV-Vis-IR spectrometer under the irradiation of 250 W ultraviolet lamp,and the photocatalytic activity of the composites photocatalysts was studied.Moreover,the recycling experiment of the optimal mass ratio(20/80)g-C_(3)N_(4)/Fe_(3)O_(4)composites was carried out to test the degradation of rhodamine B solution.The results show that the degradation rate of 5 mg/L rhodamine B reaches 95.8%by the mass ratio(20/80)g-C_(3)N_(4)/Fe_(3)O_(4)composite within 2 hours,and it’s degradation rate to rhodamine B still reaches 82.4%after five recycle times.It shows good photocatalytic activity and catalytic stability for the(20/80)g-C_(3)N_(4)/Fe_(3)O_(4)composite.

关 键 词:光催化 g-C_(3)N_(4) Fe_(3)O_(4) 高温煅烧法 可回收 

分 类 号:TQ323.4[化学工程—合成树脂塑料工业]

 

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