具有特殊晶面立方体Cu_(2)O/C_(3)N_(4)中空管的制备及其光催化性能研究  

Preparation of hollow tube with special crystal plane Cu_(2)O/C_(3)N_(4) and study on its photocatalytic performance

作　　者：郑芒 付芸绮 蒋保江[1] ZHENG Mang;FU Yunqi;JIANG Baojiang(School of Chemistry and Materials Science,Heilongjiang University,Harbin 150080,China)

机构地区：[1]黑龙江大学化学化工与材料学院,哈尔滨150080

出　　处：《黑龙江大学自然科学学报》2021年第6期672-678,共7页Journal of Natural Science of Heilongjiang University

基　　金：国家自然科学基金资助项目(21771061)。

摘　　要：通过湿化学法将具有特殊晶面的立方体Cu_(2)O原位生长在C_(3)N_(4)管上,得到了Cu_(2)O/C_(3)N_(4)异质结。利用立方体Cu_(2)O的高稳定面(100)晶面改善Cu_(2)O的稳定性,再利用C_(3)N_(4)的光催化作用共同促进光催化活性。具有特殊晶面的Cu_(2)O纳米颗粒尺寸较小(约300 nm),并且具有较大的比表面积,同时也增大了Cu_(2)O/C_(3)N_(4)复合材料的比表面积(275 m^(2)·g^(-1)),提供更多的反应活性位点。Cu_(2)O与C_(3)N_(4)相比带隙较小,有助于调整Cu_(2)O/C_(3)N_(4)复合结构的吸光范围以及价带位置。因此,具有特殊晶面的Cu_(2)O和C_(3)N_(4)构建的异质结能有效地促进光生载流子的分离与迁移,从而提高光催化活性,Cu_(2)O/C_(3)N_(4)复合材料在光催化降解四环素反应中降解率高达98%。Cu_(2)O with special crystal planes was grown in situ on the C_(3)N_(4)tube by wet chemical method,and Cu_(2)O/C_(3)N_(4)heterojunction was obtained.The highly stable surface(100)of cubic Cu_(2)O was used to improve the stability of Cu_(2)O,and the photocatalytic effect of C_(3)N_(4)was used to jointly promote the photocatalytic activity.Cu_(2)O nanoparticles with special crystal planes were smaller in size(about 300 nm)and had a larger specific surface area.At the same time,it also increased the specific surface area(275 m^(2)·g^(-1))of Cu_(2)O/C_(3)N_(4)composite material,providing more reactivity site.The band gap of Cu_(2)O was smaller than that of C_(3)N_(4),which was helpful to adjust the light absorption range and valence band position of Cu_(2)O/C_(3)N_(4)composite structure.Therefore,the heterojunction constructed by Cu_(2)O and C_(3)N_(4)with special crystal planes could effectively promote the separation and migration of photogenerated carriers,thus improving the photocatalytic activity.The degradation rate of Cu_(2)O/C_(3)N_(4)composite material in the photocatalytic degradation reaction of tetracycline was as high as 98%.

关 键 词：Cu_(2)O C_(3)N_(4) 湿化学法 降解四环素 

分 类 号：O614.8[理学—无机化学]