光催化
X射线光电子能谱
可见光谱
光降解
材料科学
扫描电子显微镜
光化学
光致发光
催化作用
化学工程
化学
光电子学
有机化学
复合材料
工程类
作者
Ali Reza Amani‐Ghadim,Shakiba Dadkhah,Majid Abdouss,Alireza Khataee,Shabnam Sattari,Mehdi Fattahi
标识
DOI:10.1016/j.jcis.2024.03.005
摘要
Herein, for the first time, we reported the synthesis of a novel Z-scheme CoxNi1−xTiO3/CdS (x = 0.5) heterojunction photocatalyst and the investigation of its visible-light-driven photocatalytic performance toward degradation of methylene blue (MB). The developed photocatalyst was structurally characterized by applying X-Ray diffraction analysis (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET), differential reflectance spectroscopy (DRS), and photoluminescence (PL) techniques. The results indicated the formation of a highly porous structure with improved visible light adsorption capacity, favorable for the catalytic activity. At an optimum condition of 10 mg/L of MB and 300 mg/L of catalyst, the ternary photocatalyst demonstrated a MB removal efficiency of 99 % after 75 min of the treatment process. The radical trapping experiments unveiled that hydroxyl and superoxide radicals were two main reactive species formed under visible light, while the valance holes possessed an insignificant role. The synergetic impact of the CoxNi1−xTiO3 (x = 0.5) and CdS on the photodegradation of MB over the as-prepared CoxNi1−xTiO3/CdS (x = 0.5) photocatalyst through Z-scheme photocatalysis was indicated by the results of the mechanism studies. The percentage impact of the treatment time, MB concentration, the ratio of CoxNi1−xTiO3/CdS (x = 0.5), and the dosage of catalyst using analysis of the CCD modeling was obtained as 47.04, 16.67, 7.22 and 0.87 %, respectively. Furthermore, the as-synthesized photocatalyst possessed high recyclability and photostability with only a 3 % decline in activity after four repetitive cycles.
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