Ag/质子化g-C_(3)N_(4)纳米棒材料的制备及其光催化降解性能  

Preparation and photocatalytic degradation performance of Ag/protonated g‑C_(3)N_(4) nanorod materials

作　　者：殷广明[1,2] 王怀尧 郑建华 董鑫月 李健 孙轶男 高一铭 王兵兵 YIN Guangming;WANG Huaiyao;ZHENG Jianhua;DONG Xinyue;LI Jian;SUN Yi’nan;GAO Yiming;WANG Bingbing(College of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar,Heilongjiang 161006,China;Analysis and Test Center,Qiqihar University,Qiqihar,Heilongjiang 161006,China)

机构地区：[1]齐齐哈尔大学化学与化学工程学院,齐齐哈尔161006 [2]齐齐哈尔大学分析测试中心,齐齐哈尔161006

出　　处：《无机化学学报》2024年第8期1491-1500,共10页Chinese Journal of Inorganic Chemistry

基　　金：黑龙江省高校教师基本科研业务费(No.135509106)资助。

摘　　要：制备了Ag负载于质子化g-C_(3)N_(4)(pCN)的纳米棒材料(Ag/pCN),对比了g-C_(3)N_(4)(CN)、表面负载Ag的CN(Ag/CN)、pCN和Ag/pCN在可见光条件下光催化降解亚甲蓝(MB)溶液的效果。结果表明,Ag/pCN光催化效率最高(92.63%),并且具有良好的稳定性;通过光电流-时间(I-t)曲线、Nyquist曲线、Mott-Schokkty曲线和捕获实验探究了Ag/pCN光催化降解MB的机理:虽然pCN的π共轭体系较CN发生变化,但由于形成了纳米棒,其比表面积的增加以及Ag负载的协同效应致使Ag/pCN具有优异的光催化性能。光催化过程中羟基自由基(·OH)是起主要作用的活性物质,其由光生电子(e^(-))与表面吸附的O_(2)反应产生以及光生空穴(h^(+))与H_(2)O或OH^(-)反应产生。Protonated g⁃C_(3)N_(4) nanorod loaded with Ag(Ag/pCN)materials were prepared.The photocatalytic degra⁃dation of methylene blue(MB)solution was compared between g⁃C_(3)N_(4)(CN),CN loaded with Ag(Ag/CN),pCN,and Ag/pCN under visible light.Ag/pCN had the highest photocatalytic efficiency of 92.63%and exhibited good stability.The mechanism of photocatalytic degradation of MB by Ag/pCN was investigated through the photocurrent⁃time(I⁃t)curve,Nyquist curve,Mott⁃Schokkty curve,and capture experiment.Although theπconjugated system of pCN was disrupted,the synergistic effect of forming nanorods,increasing specific surface area,and loading Ag resulted in the excellent photocatalytic performance of Ag/pCN.Hydroxyl radicals(·OH)are the main active substances in the pho⁃tocatalytic process.The active substance·OH is produced by the reaction of photo⁃generated electrons(e^(-))with O_(2),as well as photo⁃generated holes(h^(+))with H_(2)O or OH^(-).

关 键 词：AG 质子化 g-C_(3)N_(4) 光催化降解 

分 类 号：O614.411[理学—无机化学]