Biosynthesis of gold nanoparticles using fungus Trichoderma sp. WL‐Go and their catalysis in degradation of aromatic pollutants. Issue 1 (25th September 2018)

• Record Type: Journal Article
• Authors: Qu, Yuanyuan; Li, Xuanying; Lian, Shengyang; Dai, Chunxiao; Jv, Ziyi; Zhao, Bo; Zhou, Hao
• Is Part Of: IET nanobiotechnology. Volume 13:Issue 1(2019)
• Page Start: 12
• Page End: 17
• Publication Date: 2018-09-25
• Subjects: catalysts -- dyes -- particle size -- reduction (chemical) -- nanobiotechnology -- nanofabrication -- ultraviolet spectra -- gold -- transmission electron microscopy -- nanoparticles -- proteins -- catalysis -- visible spectra -- pollution control -- microorganisms; nitro‐aromatics -- catalytic rate constants -- decolourisation efficiency -- green gentle method -- efficient green method -- gold nanoparticles biosynthesis -- cell‐free extracts -- UV–Vis spectra -- characteristic absorption band -- transmission electron microscopy images -- as‐synthesised AuNPs -- catalytic performance -- protein -- catalytic activities -- efficient catalytic capability -- fungus Trichoderma sp. WL‐Go -- aromatic pollutants degradation -- 2‐nitrophenol -- 3‐nitrophenol -- 4‐nitrophenol -- 2‐nitroaniline -- 3‐nitroaniline -- azo dye decolourisation -- Au; Biotechnology -- Periodicals; Nanotechnology -- Periodicals; 660.6
• DOI: 10.1049/iet-nbt.2018.5177
• Languages: English
• ISSNs: 1751-8741

Abstract

Abstract : An efficient green method of gold nanoparticles (AuNPs) biosynthesis was achieved by cell‐free extracts of fungus Trichoderma sp. WL‐Go. Based on UV–Vis spectra, AuNPs biosynthesised by cell‐free extracts with 90 mg/l protein exhibited a characteristic absorption band at 556 nm and was stable for 7 days. Transmission electron microscopy images revealed that the as‐synthesised AuNPs were spherical and pseudo‐spherical, and the average size was calculated to be 9.8 nm with a size range of 1–24 nm. The AuNPs illustrated their good catalytic activities for reduction of nitro‐aromatics (2‐nitrophenol, 3‐nitrophenol, 4‐nitrophenol, 2‐nitroaniline, 3‐nitroaniline) with catalytic rate constants of 7.4 × 10 −3 s −1, 10.3 × 10 −3 s −1, 4.9 × 10 −3 s −1, 5.8 × 10 −3 s −1, 15.0 × 10 −3 s −1, respectively. Meanwhile, the AuNPs also showed excellent catalytic performance in decolourisation of azo dyes with decolourisation efficiency from 82.2 to 97.5%. This study provided a green gentle method for AuNPs synthesis as well as exhibiting efficient catalytic capability for degradation of aromatic pollutants.