An experimental and theoretical study on photoluminescence of Ce^(3+)-doped ZnS quantum dots and their application in Aspergillus oryzae  

作　　者：Yan Lei Guangzhi Zhang Yitong Yao Gaiqin Zhu Zhong Chen Jiangrong Dan Hua Liu Shuwang Duo 

机构地区：[1]School of Materials and Mechanical and Electrical EngineeringJiangxi Science and Technology Normal University,Nanchang,330013,China

出　　处：《Journal of Rare Earths》2024年第6期1020-1028,I0001,共10页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(61964008);the Natural ScienceFoundation of Jiangxi Province,China(20212BAB204017)。

摘　　要：ZnS and ZnS:3.125%Ce^(3+)(ZSC)quantum dots(QDs)were synthesized by a low-temperature solid-phase method.The crystal structure,photoluminescence(PL)properties of ZSC QDs,and their effects on the growth and kojic acid production of Aspergillus oryzae(A.oryzae)were investigated.It is found that both QDs have a cubic blend structure with the average particle size ranging of 2.75-6.14 nm.Ce^(3+)doping not only increases the band gap of ZnS QDs from 3.43 to 3.48 eV,but also increases the PL intensity by about 2.23 times,which is due to the fact that the electron carrier concentration is improved,and then the rate of radiative recombination is increased.The integral emission intensity,biomass,extracellular proteins yield,and kojic acid production of A.oryzae cultured with ZSC(ZnS)QDs are about 4.31(3.23),1.61(1.20),1.12(1.09),and 2.99(1.68)times higher than that of medium without QDs,respectively.

关 键 词：ZNS Quantum dots DOPING First-principles calculations Aspergllus oryzae Rare earths 

分 类 号：O657.3[理学—分析化学]