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第 36 卷第 7 期                             精   细   化   工                                  Vol.36, No.7
             201 9 年 7 月                             FINE CHEMICALS                                 July    2019


              水处理技术与环境保护
                             CDs/ZnO/g-C N 三元组分协同作用
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                                          促进光催化降解染料



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                       张   洁 ,田景芝 ,郝   欣 ,荆   涛 ,郑永杰 ,曹向宇
                 (1.  齐齐哈尔大学  化学与化学工程学院,黑龙江  齐齐哈尔    161006;2.  齐齐哈尔大学  轻工纺织学院,
                 黑龙江  齐齐哈尔    161006)
                 摘要:以尿素、醋酸锌、柠檬酸为主要原料,采用浸渍-热聚合法分别制备了 ZnO/g-C 3 N 4 和 CDs/ZnO/g-C 3 N 4 复
                 合材料,考察了 2 种催化剂在可见光下对罗丹明 B 的光降解效率。利用 XRD、TEM、XPS、UV-Vis DRS、FTIR
                 对催化剂进行了表征和评价。结果表明:石墨相氮化碳(g-C 3 N 4 )呈片状,ZnO 呈棒状,碳点(CDs)平均直
                 径约为 10 nm,呈单分散排布,分散性较好;且 CDs/ZnO/g-C 3 N 4 仍保持石墨相 g-C 3 N 4 的晶型结构,三元组分相
                 互协同作用使 CDs/ZnO/g-C 3 N 4 在可见光下,光照时间为 210 min,对质量浓度为 8 mg/L 的 Rh B 溶液表现出优
                 异的光催化性能,其降解罗丹明 B 的效果优于单体 g-C 3 N 4 、ZnO 及 ZnO/g-C 3 N 4 ,降解率可达到 70%左右。
                 关键词:浸渍-热聚合法;CDs/ZnO/g-C 3 N 4 ;降解率;催化;石墨相;水处理技术
                 中图分类号:O643.36      文献标识码:A     文章编号:1003-5214 (2019) 07-1439-07



                       Synergistic Effect of CDs/ZnO/g-C 3N 4 Ternary Component for
                                       Photocatalytic Degradation of Dyes


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                    ZHANG Jie , TIAN Jing-zhi , HAO Xin , JING Tao , ZHENG Yong-jie , CAO Xiang-yu
                 (1.  College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar  161006, Heilongjiang, China;
                 2. Light Industry Textile Institute, Qiqihar University, Qiqihar 161006, Heilongjiang, China)
                 Abstract: ZnO/g-C 3N 4  and  CDs/ZnO/g-C 3N 4  composites  were  prepared  by  impregnation-thermal
                 polymerization with urea, zinc acetate and citric acid as main raw materials. The photocatalytic degradation
                 of Rhodamine B under visible light was investigated using the composites as photocatalysts. The catalysts
                 were  characterized  and  evaluated by  means  of XRD,  TEM,  XPS,  UV-Vis  DRS  and  FTIR.  The  results
                 showed that graphite phase carbon nitride (g-C 3N 4) was flaky, ZnO was rod-shaped, and carbon dots (CDs)
                 had  an  average  diameter  of  about  10  nm,  which  was  monodisperse  and  exhibited  good  dispersibility.
                 Furthermore,  CDs/ZnO/g-C 3N 4  still  maintained  the  crystal  structure  of  g-C 3N 4  in  the  graphite  phase.
                 CDs/ZnO/g-C 3N 4  displayed  excellent  photocatalytic  performance  for  Rh  B  solution with a  mass
                 concentration of 8 mg/L under visible light illumination for 210 min due to the synergistic effect of ternary
                 components.  Moreover,  CDs/ZnO/g-C 3N 4  could  degrade  Rh  B  better  than  monomer  g-C 3N 4,  ZnO  and
                 ZnO/g-C 3N 4, with a degradation rate of about 70%.
                 Key words: impregnation-thermal polymerization; CDs/ZnO/g-C 3N 4; degradation rate; catalytic technique;
                 graphite phase; water treatment


                 石墨相氮化碳(g-C 3 N 4 )作为具有良好可见光                   仍然存在比表面积小和光生电子-空穴对复合率高
            响应的非金属有机半导体,因其独特的半导体能带                             的不足,在一定程度上限制了其光催化活性                    [2-3] 。通
            结构和化学稳定性及可调控的化学组成,在光催化                             过调变材料空间结构与组成,制备多元半导体氧化
                                            [1]
            净化有机污染物领域引起广泛关注 。然而,g-C 3 N 4                      物复合材料,实现室温条件直接利用太阳光净化水

                 收稿日期:2018-12-19;  定用日期:2019-03-15; DOI: 10.13550/j.jxhg.20180925
                 基金项目:黑龙江省教育厅(135309212);2018 年黑龙江省优势特色学科项目(YSTSXK201858)
                 作者简介: 张   洁(1993—),女,硕士生,E-mail:1140389093@qq.com。联系人:田景芝(1964—),女,硕士生导师,教授, E-mail:
                 tjz6666@163.com。
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