Combining rhombohedral dodecahedral ZnO with g-C3N4 nanosheets for enhanced photocatalytic activity

被引:1
作者
Tao, Feifei [1 ,2 ]
He, Yuting [1 ]
Wang, Linxia [1 ]
Liang, Pengfei [1 ]
Zhang, Pingan [1 ]
机构
[1] Shaoxing Univ, Dept Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China
[2] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China
基金
中国国家自然科学基金;
关键词
Photocatalysis; Degradation; Wastewater remediation; CHARGE SEPARATION; DYE; DEGRADATION; PERFORMANCE; MECHANISM; REMOVAL; NANOCOMPOSITE; NANOPARTICLES; TEMPERATURE; REDUCTION;
D O I
10.1016/j.jpcs.2024.112293
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Photocatalysis technology is an effective method to remove pollutants in aquatic environment assisted by solar energy. Herein, the rhombohedral dodecahedral ZnO was dispersed on the g-C3N4 nanosheets for the construction of ZnO/g-C3N4 heterojunction via the combination of solvothermal method and calcination. The obtained ZnO/g-C3N4 heterojunction manifests excellent photocatalytic ability for methyl orange (MO). Especially, the optimal ZnO/g-C3N4 composite with the ZnO content of 10 wt% (ZC-3) exhibits the degradation efficiency of MO as high as 98.0 % under visible-light of 60 min. A series of factors were all-around investigated, such as initial pH, photocatalyst dosage, initial MO concentration, organic anions, humic acid and other dyes. The photocatalytic degradation behavior of MO complies with the first-order reaction kinetics, and the apparent rate constant (kapp) of ZC-3 is 2.3 and 13.4 times than that of pure g-C3N4 and pure ZnO. Meanwhile, the ZnO/g-C3N4 heterojunction exhibits satisfactory cyclic stability and its photocatalytic mechanism is postulated. Therefore, the ZnO/g-C3N4 heterojunction possesses great economic utilization value and is expected to be widely used for wastewater remediation.
引用
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页数:10
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