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Optimization of TiO2 immobilized – Reduce graphene oxide photocatalyst toward organic compounds in aqueous medium
Synthetic Metals ( IF 4.4 ) Pub Date : 2021-08-05 , DOI: 10.1016/j.synthmet.2021.116867
Thieu Quang Quoc Viet 1, 2, 3, 4 , Tran Huynh Nhu 2, 3 , Doan Ba Thinh 1, 2, 3 , Dinh Ngoc Trinh 1, 2, 3 , Nguyen Thi Huong Giang 1, 2, 3 , Nguyen Minh Dat 1, 3 , Nguyen Duy Hai 2, 3 , Hoang Minh Nam 2, 3 , Mai Thanh Phong 2, 3 , Nguyen Huu Hieu 1, 2, 3
Affiliation  

In this work, a one-pot hydrothermal route was synergistically applied for TiO2 immobilized reduced graphene oxide (TiO2/rGO) facilitation. The material was characterized by modern analysis methods and studied the photocatalytic performance with methylene blue (MB) in the water. The characteristic results expressed that TiO2 in truncated octahedral bipyramidal structure with 4–25 nm was disseminated onto the rGO base. Simultaneous effects of the reaction temperature, pH, adsorption time, photocatalytic time, MB concentration, and catalyst dosage on the MB photodegradation of TiO2/rGO were also conducted by full factorial experimental design according to Placket–Burman and Box–Behnken designs. At room temperature, after 2h–adsorption and photodegradation with MB concentration of 23 mg/L in pH of 10 solution and 20 mg catalyst, nearly 100% of MB was productively decomposed out of the medium with a relatively high reaction rate constant. The photocatalytic performance showed an excellent impact toward other types of organic contaminants with the above condition, indeed affirming an extensive use in wastewater treatment with organic pollutants.



中文翻译:

TiO2 固定化的优化——将氧化石墨烯光催化剂还原为水性介质中的有机化合物

在这项工作中,一锅水热路线协同应用于TiO 2固定的还原氧化石墨烯(TiO 2 /rGO)促进。该材料通过现代分析方法进行表征,并研究了水中亚甲蓝 (MB) 的光催化性能。特征结果表明,具有 4-25 nm 截断八面体双锥结构的TiO 2散布到 rGO 基底上。反应温度、pH、吸附时间、光催化时间、MB浓度和催化剂用量对TiO 2 MB光降解的同时影响/rGO 也根据 Plaket-Burman 和 Box-Behnken 设计通过全因子实验设计进行。在室温下,在 10 溶液和 20 mg 催化剂的 pH 值下,MB 浓度为 23 mg/L 吸附和光降解 2 小时后,几乎 100% 的 MB 以相对较高的反应速率常数从介质中有效分解。光催化性能对具有上述条件的其他类型的有机污染物表现出优异的影响,确实证实了在有机污染物废水处理中的广泛应用。

更新日期:2021-08-07
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