Au nanoparticles dispersed chitosan/ZnO ternary nanocomposite as a highly efficient and reusable visible light photocatalyst

被引:11
|
作者
Faisal, M. [1 ,2 ]
Ahmed, Jahir [1 ,2 ]
Algethami, Jari S. [1 ,2 ]
El-Toni, Ahmed Mohamed [3 ]
Labis, Joselito P. [3 ]
Khan, Aslam [3 ]
Harraz, Farid A. [1 ,4 ]
机构
[1] Najran Univ, Promising Ctr Sensors & Elect Devices PCSED, Adv Mat & Nanores Ctr, Najran 11001, Saudi Arabia
[2] Najran Univ, Fac Sci & Arts, Dept Chem, Najran 11001, Saudi Arabia
[3] King Saud Univ, King Abdullah Inst Nanotechnol, Riyadh 11451, Saudi Arabia
[4] Najran Univ, Fac Sci & Arts Sharurah, Dept Chem, Sharurah 68342, Saudi Arabia
关键词
ZnO; Chitosan; AuNPs; Sol-gel; Photoreduction; Photocatalyst; FACILE SYNTHESIS; HYDROTHERMAL SYNTHESIS; AQUEOUS SUSPENSIONS; AZO-DYE; ZNO; DEGRADATION; NANORODS; REMOVAL; SENSOR; TIO2;
D O I
10.1016/j.mssp.2023.107798
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The environmental pollution in particular contamination of surrounding and ground water are major concerns for regulation authorities and scientific community. In the current work, a novel visible light ternary photocatalytic structure based on mesoporous ZnO in combination with chitosan (CSN) and gold nanoparticles (AuNPs) was synthesized for serious water pollution issue. The Au@CSN/ZnO nanocomposite photocatalyst was developed through the sol-gel methodology followed by ultrasonication and photoreduction techniques. XRD investigation revealed the hexagonal wurtzite structure of ZnO, while XPS and FTIR measurements confirmed the formation of ternary nanocomposite among Au, CSN and ZnO. TEM analysis revealed the presence of AuNPs (5-15 nm), CSN sheets (micron size) and ZnO nanoparticles (20-120 nm) in designed ternary photocatalyst. Diffuse reflectance spectroscopy showed lowering in band gap energy from 3.1 to 2.87 eV as bare ZnO modified to Au@CSN/ZnO. The as-fabricated Au@CSN/ZnO nanocomposite was proven as a decidedly efficient photo-catalyst when employed on colorless insecticide imidacloprid (IMD) and on colored methylene blue (MB) dye under visible-light illumination. Efficient photocatalytic performance with 93.21% removal of insecticide only in 20 min was achieved, representing 211% more efficient than bare mesoporous ZnO. In addition, Au@CSN/ZnO nanostructure showed rapid removal of MB with almost complete destruction of complicated structure just in 12 min under visible light. Furthermore, the current-developed photocatalyst exhibited adequate stability and recyclability, which is beneficial for the practical application in environmental remediation.
引用
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页数:12
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