Open AccessBiosynthesis of gold nanoparticles using fungus Trichoderma sp. WL‐Go and their catalysis in degradation of aromatic pollutants
Author(s) -
Qu Yuanyuan,
Li Xuanying,
Lian Shengyang,
Dai Chunxiao,
Jv Ziyi,
Zhao Bo,
Zhou Hao
Publication year - 2019
Publication title -
iet nanobiotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.366
H-Index - 38
eISSN - 1751-875X
pISSN - 1751-8741
DOI - 10.1049/iet-nbt.2018.5177
Subject(s) - colloidal gold , catalysis , 4 nitrophenol , nuclear chemistry , nitrophenol , chemistry , nanoparticle , transmission electron microscopy , degradation (telecommunications) , photochemistry , materials science , nanotechnology , organic chemistry , telecommunications , computer science
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.