CAJ | 학술논문

利用单晶Si辅助水热法低温合成了ZnO/CdS复合光催化剂，采用XRD、SEM、Dr-UV-vis等技术对材料结构和形貌进行表征，并对四环素类抗生素进行光催化降解研究。结果表明，当锌源与镉源的物料摩尔比为25∶1、反应时间10h条件下，可获得形貌最佳的ZnO/CdS复合物，即尺寸为1μm的具有孔结构的棒状ZnO骨架表面黏附了尺寸在几十纳米的 CdS 粒子。CdS 的复合明显降低 ZnO/CdS 的带隙能至2.87eV，在日光照射下反应120min，对盐酸四环素（TC）、土霉素（OTC）和强力霉素（DC）3种四环素类抗生素的光催化降解率分别达到81.65%、70.68%和54.61%，降解反应速率很快，符合一级反应动力学方程；在紫外光照射下几乎可以完全降解这3种抗生素，证明了该复合材料的高催化效率。
이용단정Si보조수열법저온합성료ZnO/CdS복합광최화제，채용XRD、SEM、Dr-UV-vis등기술대재료결구화형모진행표정，병대사배소류항생소진행광최화강해연구。결과표명，당자원여력원적물료마이비위25∶1、반응시간10h조건하，가획득형모최가적ZnO/CdS복합물，즉척촌위1μm적구유공결구적봉상ZnO골가표면점부료척촌재궤십납미적 CdS 입자。CdS 적복합명현강저 ZnO/CdS 적대극능지2.87eV，재일광조사하반응120min，대염산사배소（TC）、토매소（OTC）화강력매소（DC）3충사배소류항생소적광최화강해솔분별체도81.65%、70.68%화54.61%，강해반응속솔흔쾌，부합일급반응동역학방정；재자외광조사하궤호가이완전강해저3충항생소，증명료해복합재료적고최화효솔。
ZnO/CdS nanocomposites were synthesized at low temperature by single crystal Si assisted hydrothermal method. The structure and morphology of the products were examined by X-ray diffraction(XRD),scanning electronic microscopy(SEM),ultraviolet visible diffuse reflectance (Dr-UV-vis),and carried on the research of photocatalytic degradation of tetracycline antibiotics. The result shows that the ZnO/CdS of optimal morphology was obtained at zinc and cadmium molar ration of 25∶1 reacted for 10 hour,there are several CdS nanoparticles adhere to the surface of porous ZnO rod skeleton. CdS component makes band gap of ZnO reduced to 2.87eV,leading to the degradation of tetracycline(TC),oxytetracycline(OTC) and doxycycline(DC) under xenon light reached 81.65%, 70.68% and 54.61% respectively. Moreover,ZnO/CdS composites can almost complete the degradation of three kinds of antibiotics under UV irradiation,proving high catalytic efficiency of the composite catalyst.