CAJ | 학술논문

将珍珠贝壳废弃物活化并作为载体,应用原位水解法制备出Cu2O/珍珠贝壳复合材料.运用X射线衍射、X射线光电子能谱、扫描电镜、紫外-可见漫反射吸收光谱对复合材料进行表征.用活性大红染料B-3G水溶液作为模拟废水评价复合材料在可见光下的催化性能.结果表明,负载的Cu2O呈椭球形,理论平均粒径为16.8nm.复合材料对紫外和u见光谱均有吸收.相对纯Cu2O而言,纳米Cu2O/珍珠贝壳复合材料在催化有机染料降解脱色实验中具有更高的活性,在适宜的环境条件下(pH为6.0～12.0,反应时间为90min,B-3G初始浓度≤220mg/L),催化B-3G降解脱色率达98%,催化反应过程符合伪一级反应动力学模型.此外,傅里叶变换红外光谱研究表明,纳米Cu2O/珍珠贝壳复合材料的形成源于Cu2O和CaO间的结合并发生相互作用.
장진주패각폐기물활화병작위재체,응용원위수해법제비출Cu2O/진주패각복합재료.운용X사선연사、X사선광전자능보、소묘전경、자외-가견만반사흡수광보대복합재료진행표정.용활성대홍염료B-3G수용액작위모의폐수평개복합재료재가견광하적최화성능.결과표명,부재적Cu2O정타구형,이론평균립경위16.8nm.복합재료대자외화u견광보균유흡수.상대순Cu2O이언,납미Cu2O/진주패각복합재료재최화유궤염료강해탈색실험중구유경고적활성,재괄의적배경조건하(pH위6.0～12.0,반응시간위90min,B-3G초시농도≤220mg/L),최화B-3G강해탈색솔체98%,최화반응과정부합위일급반응동역학모형.차외,부리협변환홍외광보연구표명,납미Cu2O/진주패각복합재료적형성원우Cu2O화CaO간적결합병발생상호작용.
Waste pearl shells were activated and used as carriers to prepare a nano-Cu2O/pearl shell composite photocatalyst by in situ hydrolysis. The composites were characterized by X-ray diffraction, X-ray photoelectron spectrometer, scanning electron microscopy, and UV-Vis diffuse reflectance spectrometer. Reactive red dye B-3G solutions were used as simulate wastewater to investigate the photocatalytic performance under visible light irradiation. The loaded Cu2O particles had an average diameter of 16.8 nm, were oval in shape and have absorption bands in the UV and visible region similar to those of pure Cu2O particles. The nano-Cu2O/pearl shell composites had much higher photocatalytic activities than pure Cu2O. Over 98% of the B-3G solutes were decolorized by these composites under the conditions of pH = 6.0-12.0, reaction time = 90 min, and B-3G concentration ≤ 220 mg/L. The photocatalytic decolorization of B-3G followed pseudo-first order kinetics. The formation mechanism of the nano-Cu2O/pearl shell composites was studied by Fourier transform infrared spectroscopy. It involved the interaction and combination of Cu2O and CaO.