Effective removal of high-chroma rhodamine B over Sn 0.215 In 0.38 S/reduced graphene oxide composite: Synergistic factors and mechanism of adsorption enrichment and visible photocatalytic degradation
Effective removal of high-chroma rhodamine B over Sn 0.215 In 0.38 S/reduced graphene oxide composite: Synergistic factors and mechanism of adsorption enrichment and visible photocatalytic degradation
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Sn 0.215 In 0.38 S/还原氧化石墨烯复合材料有效去除高色度罗丹明 B：吸附富集和可见光催化降解的协同因素和机制
DOI：
10.1016/j.powtec.2018.01.046
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发表时间：
2018
影响因子：
5.2
通讯作者：
Zhifeng Liu
中科院分区：
文献类型：
--
作者：
Zhibin Wu;Xingzhong Yuan;Hua Zhong;Hou Wang;Longbo Jiang;Lijian Leng;Hui Wang;Guangming Zeng;Zhifeng Liu
The highly visible light active Sn0.215In0.38S/reduced graphene oxide (SIS/RGO) composites with hierarchical porous were prepared by a facil solvothermal in-situ growth method for rhodamine B (RhB) removal coupling adsorption with photocatalysis. The morphology, composition and photocurrent response of the adsorptive photocatalysts were systematically characterized. The investigation results showed that both adsorption and photocatalytic processes were affected by pH, ionic strength and so on. The RhB adsorption process complied with pseudo-second order kinetics equation and Langmuir isotherm model, and the SIS/RGO-2.5% showed the optimum adsorption-photocatalytic performance. The maximum adsorption capacity of SIS/RGO-2.5% was 173.97 mg·g−1mainly attributing to the electrostatic attraction, π − π interaction and surface complexation. Due to efficient mass transfer efficiency, dye self-sensitization and effective transfer of photogenerated carriers, the photodegradation efficiency of RhB over SIS/RGO-2.5% was as high as 96.25% under visible light irradiation for 25 min and the corresponding reaction rate constant is 3.98 times of Sn0.215In0.38S. The results of free radical capture and electron spin resonance experiments indicated that the radical dotO2−and h+were the main active species attacking RhB. Furthermore, cyclic experiments showed the considerable reusability and stability of photocatalysts for the RhB degradation.
