摘要
Natural minerals,abundant and easily obtained through simple physical processing,offer a cost-effective and environmentally friendly solution for dyeing wastewater disposal and air pollution treatment.This study investigates the photocatalytic removal of NO using natural different types of dyes,loaded on natural sand,under visible light illumination.By examining various coating concentrations of dyes and sand weights,we discovered that sand loaded with Rhodamine B(RhB)exhibits high activity for the photo-oxidation of NO.A combination results of X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),Fourier transform infrared spectroscopy(FTIR)and thermogravimetric(TG)analyses confirm the presence of SiO_(2),CaCO_(3),Al_(2)O_(3)and iron oxides as the main components of the sand.Furthermore,studying RhB-loaded individual components reveals that CaCO_(3)plays a crucial role in enhancing the NO removal rate.Experimental results and theoretical calculations demonstrate the establishment of a directional charge transfer channel from CaCO_(3)to RhB,facilitating the adsorption and activation of molecular NO and O_(2).This work not only promotes the utilization of natural mineral resources but also enriches the fields of environmental photochemistry and semiconductor photocatalysis.
基金
financially supported by the National Natural Science Foundation of China(Nos.52370109,51808080 and 21707036)
China Postdoctoral Science Foundation(No.2022M710830)
the Venture and Innovation Support Program for Chongqing Overseas Returnees(No.cx2022005)
the Natural Scienceof CQ CSTC(No.CSTB2022NSCQMSX1267)
Chongqing Natural Science Postdoctoral Fund(No.cstc2019jcyj-bsh0107)
the Research Project of Chongqing Education Commission Foundation(Nos.KJQN201800826,KJQN202000818 and KJQN202200830&KJQN201800840)
the Science and Technology Research Program of Chongqing Municipal Education Commission of China(No.KJZD-K202100801)
the Post-doctoral Program Funded by Chongqing,Chongqing University Innovation Research Group project(No.CXQT21023)
the High Level Talent Scientific Research Startup Project of Chongqing Technology and Business University(No.1956044)
support from FCT/MCTES(Fundacao para a Ciência e Tecnologia and Ministério da Ciência,Tecnologia e Ensino Superior)(Nos.UIDB/50006/2020 and UIDP/50006/2020)
for the Scientific Employment Stimulus-Institutional Call(No.CEECINST/00102/2018)。
