CAJ | 학술논문

采用溶胶凝胶法制备了稀土铈掺杂的纳米氧化锌.通过X射线衍射（XRD）、紫外-可见光谱（UV-Vis）和红外光谱（FTIR）分析等对样品的微观结构和性能进行了表征.结果表明：Ce4+成功掺入ZnO中，结晶质量良好，粒径约为10.7 nm；UV-Vis曲线有红移现象.产品的光催化活性以亚甲基蓝（MB）为评价模型，对掺杂比例、表面活性剂种类、煅烧温度、煅烧时间等条件进行了实验研究，得出了制备纳米氧化锌的最优条件.即最佳的掺杂比例为n（Ce）：n（Zn）=0.05、表面活性剂为十二烷基磺酸钠、煅烧温度为550℃、煅烧时间为3.0 h.同时考察了染料溶液起始pH值以及催化剂的用量，光照时间等对催化效率的影响.结果表明：当MB溶液浓度为10 mg/L，溶液pH值为7~8、催化剂的用量为5 g/L、光照时间2 h后降解率可达85%以上.在上述条件下，催化剂对实际染料脱色率达87.67%，CODCr去除率为63.5%.
채용용효응효법제비료희토시참잡적납미양화자.통과X사선연사（XRD）、자외-가견광보（UV-Vis）화홍외광보（FTIR）분석등대양품적미관결구화성능진행료표정.결과표명：Ce4+성공참입ZnO중，결정질량량호，립경약위10.7 nm；UV-Vis곡선유홍이현상.산품적광최화활성이아갑기람（MB）위평개모형，대참잡비례、표면활성제충류、단소온도、단소시간등조건진행료실험연구，득출료제비납미양화자적최우조건.즉최가적참잡비례위n（Ce）：n（Zn）=0.05、표면활성제위십이완기광산납、단소온도위550℃、단소시간위3.0 h.동시고찰료염료용액기시pH치이급최화제적용량，광조시간등대최화효솔적영향.결과표명：당MB용액농도위10 mg/L，용액pH치위7~8、최화제적용량위5 g/L、광조시간2 h후강해솔가체85%이상.재상술조건하，최화제대실제염료탈색솔체87.67%，CODCr거제솔위63.5%.
Ce4+-doped nanometer ZnO powder was synthesized by so-l gel method. The microstructures and prop-erties of the samples were characterized by means of XRD, UV-Vis and FTIR. The results indicated that the Ce 4+was successfully incorporated into ZnO, and that the diameter of nanometer was about 10.7 nm, and induced the red shifting in the UV-Vis spectra. The photocatalytic activity of the samples was investigated using methylene blue (MB) as the model reaction under the irradiation with ultraviolet light. The results showed that the doping of Ce4+ could increase the photocatalytic activities of ZnO nanopowders and that the best molar ratio of Ce4+ was n(Ce)/n(Zn)=0.05, that the surfactant was sodium dodecyl sulfate, and that the nanometer ZnO was calcinated at 550 ℃ for 3 hours. At the same time, the effect of photocatalytic efficiency through the pH of MB, the amount of catalyst, and effect of illumination time were also inspected. The experimental results revealed that the initial mass concentration of MB was 10 mg /L, that the pH value was 7-8, that the dosage of Ce4+/ZnO photo-catalyst was 5 g/L, that the UV-irradiation time was 2 h, and that the removal rate of MB reached above 85%. Under the optimized conditions, the degradation rate of real dye wastewater was up to 87.67% and removal efficiency of COD was 63.5%.