高师理科学刊2024，Vol.44Issue(5)：66-71,6.DOI:10.3969/j.issn.1007-9831.2024.05.013
管状g-C3N4/CQDs复合物制备及其光催化降解亚甲基蓝
Research on the preparation of tubular g-C3N4/CQDs composites and its photocatalytic degradation towards methylene blue
摘要
Abstract
Carbon quantum dots(CQDs)was synthesized using hemp leaves and ammonium fluoride as feedstocks through microwave alcohol solvothermal method.Then,the above CQDs was loaded onto the complex precursor of melamine and cyanic acid by consecutively stirring and spinning evaporation.After drying,g-C3N4/CQDs composite photocatalyst was prepared by one-step calcination methodology.After analyses on its structure,composition and morphology,the photocatalytic property was assessed by degrading the methylene blue(MB).The results show that g-C3N4/CQDs presents a tubular morphology and has a higher visible light response ability.Compared with the blank g-C3N4,the g-C3N4/CQDs complex showed a higher photocatalytic degradation ability with a degradation efficiency toward MB up to 80.8%under UV-vis light irradiation with xenon lamp for 120 min,while the blank g-C3N4 was only 31.9%,confirming an increase of 1.53 times.The mechanism analysis elucidates that the improvement of photocatalytic performance is mainly attributed to the improved morphology and structure of the catalyst,the improved visible light response together with the accelerated photo-generated charges migration rate of CQDs.关键词
碳量子点/g-C3N4/光催化/亚甲基蓝Key words
carbon dots/g-C3N4/photocatalysis/methylene blue分类
化学化工引用本文复制引用
韩鹏达,吴寒,侯旭,董国华..管状g-C3N4/CQDs复合物制备及其光催化降解亚甲基蓝[J].高师理科学刊,2024,44(5):66-71,6.基金项目
国家自然科学基金项目(32272823) （32272823）
齐齐哈尔大学大学生创新创业训练计划项目(S202310232027) （S202310232027）
