Enhanced photoresponse and efficient charge transfer in porous graphene-BaTiO3 nanocomposite for high performance photocatalysis

被引：31
作者：
Bhat, D. Krishna [1 ]
Bantawal, Harsha [1 ]
Uma, P., I [1 ]
Shenoy, U. Sandhya [2 ]
机构：
[1] Natl Inst Technol Karnataka Surathkal, Dept Chem, Mangalore 575025, India
[2] Srinivas Univ, Inst Engn & Technol, Dept Mat Sci & Engn, Mangalore 574146, India
来源：
DIAMOND AND RELATED MATERIALS | 2023年 / 139卷
关键词：
Porous graphene; Barium titanate; Photocatalysis; Methylene blue; Density functional theory; Nanocomposite; TERNARY NANOCOMPOSITE; OXIDATION; BATIO3;
D O I：
10.1016/j.diamond.2023.110312
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Porous graphene-BaTiO3 (PGBT) nanocomposite was synthesized by a simple one pot solvothermal method and its photocatalytic activity was evaluated by studying its efficiency in degrading methylene blue (MB) dye under visible light. The combination of experimental and theoretical analysis revealed enhanced photocatalytic activity of the PGBT composite, which could be attributed to (i) the interaction of BaTiO3 nanoparticles with PG sheets via Ba-C bond, (ii) reduced band gap due to the introduction of hybridized states leading to increased absorption in visible range and (iii) large surface area which provides more active sites for the efficient adsorption of MB dye. The formation of Ba-C bond proved to be highly advantageous for the efficient transport of photogenerated charge carriers, thereby suppressing the recombination of charge carriers. The synthesized nanocomposite showed three times higher photodegradation efficiency compared to BaTiO3. In addition to this, the composite also showed an excellent cyclic stability indicating its suitability as an effective photocatalyst for the environmental remediation.
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页数：9
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