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Degradation of Orange G and Trypan blue using Ag2C2O4/Ag/g-C3N4 composites as efficient photocatalyst under solar irradiation
Journal of Photochemistry and Photobiology A: Chemistry ( IF 4.3 ) Pub Date : 2020-07-11 , DOI: 10.1016/j.jphotochem.2020.112755
Hamid Abbasi_Asl , Zohreh Moradi , Mehrorang Ghaedi , Mohammad Mehdi Sabzehmeidani

A novel direct Z-scheme Ag2C2O4/Ag/g-C3N4 photocatalytic system with different weight of Ag was synthesized based on precipitation method and subsequently demonstrate exceptional application for degradation of Orange G (OG) and Trypan blue (TB). The as-prepared Ag2C2O4/Ag/g-C3N4 composites were characterized by various techniques including XRD, FE-SEM, FTIR, BET, UV–vis, EDS and mapping elements. The Ag2C2O4/Ag/g-C3N4 nanocomposite illustrates higher photocatalytic activities for OG and TB degradation with respect to single Ag2C2O4 or g-C3N4. The optimal photocatalyst Ag2C2O4/Ag/g-C3N4 (ACN6) could dramatically decompose of OG and TB under solar irradiation, which showed a degradation rate of 0.0339 min−1 and 0.031 min−1 (for OG and TB) and higher than that of pure g-C3N4 and Ag/Ag2C2O4, respectively. The radical quenching experiments were used to investigate mechanism for dye degradation processes. Furthermore, the enhanced photocatalytic performance of Ag2C2O4/Ag/g-C3N4 could be explained by a Z-scheme photocatalytic system. The present mechanism was attributed to the efficient space separation of photo-generated carriers and the high oxidation and reduction of the Ag2C2O4/Ag/g-C3N4 system.



中文翻译:

Ag 2 C 2 O 4 / Ag / gC 3 N 4复合材料作为太阳光下有效的光催化剂降解橙G和锥虫蓝

以沉淀法为基础,合成了不同重量的Ag直接Z-方案Ag 2 C 2 O 4 / Ag / gC 3 N 4光催化体系,并证明了其在降解橙G(OG)和台盼蓝(TB)方面的特殊应用。 )。所制备的Ag 2 C 2 O 4 / Ag / gC 3 N 4复合材料通过多种技术进行了表征,包括XRD,FE-SEM,FTIR,BET,UV-vis,EDS和作图元素。Ag 2 C 2 O 4 / Ag / gC 3 N 4纳米复合材料表明,相对于单个Ag 2 C 2 O 4或gC 3 N 4,OG和TB降解具有更高的光催化活性。最佳的光催化剂Ag 2 C 2 O 4 / Ag / gC 3 N 4(ACN6)在太阳辐射下能显着分解OG和TB,其降解速率分别为0.0339 min -1和0.031 min -1(对于OG和TB) )并高于纯gC 3 N 4和Ag / Ag 2 C 2 O 4, 分别。自由基猝灭实验用于研究染料降解过程的机理。此外,可以通过Z-方案光催化系统解释Ag 2 C 2 O 4 / Ag / gC 3 N 4的增强的光催化性能。该机理归因于光生载流子的有效空间分离以及Ag 2 C 2 O 4 / Ag / gC 3 N 4体系的高度氧化和还原。

更新日期:2020-07-11
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