液晶聚合物的合成与性能研究具有低熔融和广阔的液晶象温度课件.ppt

1、NiO/AgNbO3結構和光催化活性探討教授:陳建宏學生:郭韋聖 出處Journal of Alloys and Compounds 496(2010)633637 作者:Huoming Shua,b,Jimin Xieb,Hui Xua,Huaming Li b,Zheng Gua,Guangsong Suna,Yuanguo Xub摘要 1.NiO/AgNbO3複合材料製備濕含浸法 2.觸媒分析為物理和化學兩種，利用 XRD，SEM，XPS和DRS物理性質分析。化學性質分析，利用氧化亞甲基藍染料在紫外光下照射進行光降解分析。實驗2.1製備NiO/AgNbO3光觸媒1.製備 AgNbO3粉末

2、利用固態混合為反應。用AgNbO3 和Nb2O5混合，複合材煅燒880 C/5h2.加入適量的NiNO3 溶液到AgNbO3合成，攪拌後再去烘乾。乾燥後的粉末在煅燒300 C的4小時然後 NiO/AgNbO3光觸媒獲得。結果與討論Fig.1.X-ray diffraction pattern of NiO/AgNbO3:(A)with different contents of Ni loading and(B)with different calcination temperatures3.1 X-Ray分析Fig.2.XPS spectra of NiO/AgNbO3.3.2 XPS分析F

3、ig.3.XPS spectra of NiO/AgNbO3:(A)Ag 3d,(B)Nb 3d,(C)O 1s,and(D)Ni 2p.3.3 SEM分析Fig.4.SEM image of NiO/AgNbO3(A)and AgNbO3(B)samplesFig.5.EDS image of NiO/AgNbO3 catalyst.3.4 DRS分析Fig.6.UVvis diffuse reflectance spectra of NiO/AgNbO3:(A)different contents of Ni loading,(B)different calcination tempera

4、ture and(C)estimated band gap of NiO/AgNbO3 catalysts by KubelkaMunk function.Fig.7.Effects of the different Ni content on MB degradation efficiency.3.4 光催化降解分析Fig.9.Absorption spectral changes of MB under UV light irradiation:(A)AgNbO3 as photocatalyst and(B)NiO/AgNbO3 as photocatalyst.結論1.3 wt的NiO/AgNbO3焙燒在300 C紫外線照射活性最高2.氧化鎳可以提升AgNbO3光催化活性