摘要
通过原位热聚合策略,在石墨化氮化碳(g-C_(3)N_(4))表面负载上TiO_(2)纳米颗粒,制备了g-C_(3)N_(4)-TiO_(2)纳米复合材料。研究加入不同量尿素前驱体对纳米复合材料形貌、晶型结构、化学组成、光吸收能力、电荷转移能力以及光催化能力的影响。结果表明:TiO_(2)纳米颗粒均匀负载在g-C_(3)N_(4)表面,且界面间结合紧密。g-C_(3)N_(4)的负载能显著地提高纳米复合材料的电荷转移和吸收可见光的能力。在最优合成条件下制备的g-C_(3)N_(4)-TiO_(2)纳米复合材料TCN-3(TiO_(2)∶尿素=1∶3)作为光催化剂,紫外光照射120min、可见光照射150min对甲基蓝的降解率分别达到98%和99%,连续使用15h未出现明显的性能衰退现象,这也说明g-C_(3)N_(4)-TiO_(2)具有良好的结构、稳定的光催化性能和很好的实际应用价值。
The g-C_(3)N_(4)-TiO_(2) nanocomposites were prepared by TiO_(2) nanoparticles on the surface of graphitization of carbon nitride(g-C_(3)N_(4)) via in-situ thermal polymerization.The effects of different dosage of urea precursors on the morphology,crystal structure,chemical composition,light absorption capacity,charge transfer capacity and photocatalytic capacity of the nanocomposites were studied.The characterization of its morphology and structure showed that TiO_(2) nanoparticles was closely bonded on the surface of g-C_(3)N_(4).Moreover,the loading of g-C_(3)N_(4) also significantly improved the visible light absorption and charge transfer ability of the nanocomposites.Under the optimal conditions,the degradation rate of methyl blue(MB)with TCN-3 reached 98%under ultraviolet irradiation for 120 min,and 99%under visible irradiation for 150 min.The properties of the nanocomposite did not deteriorate significantly after continuous use for 15 h,which proved that the nanocomposite had good structure and stable catalytic performance,thus possessing strong application value.
作者
仓金顺
薛文
张煜珩
朱霞石
Cang Jinshun;Xue Wen;Zhang Yuheng;Zhu Xiashi(Jiangsu R&D Center of the Ecological Dyes and Chemicals,Yancheng Polytechnic College,Yancheng 224005;College of Chemistry&Chemical Engineering,Yangzhou University,Yangzhou 225002)
出处
《化工新型材料》
CAS
CSCD
北大核心
2022年第5期212-217,共6页
New Chemical Materials
基金
盐城工业职业技术学院省级科研平台开放项目(YGKF202006)
国家自然科学基金(21375117)。
关键词
光催化
甲基蓝
异质结
二氧化钛
氮化碳
photocatalysis
methyl blue
heterojunction
titanium dioxide
carbon nitride
