采用两步沉淀法将 CdS 沉积在磁性 MCM-41上,制备新型磁性 MCM-41/CdS 复合材料。通过X射线衍射光谱(XRD)、高分辨透射电镜(HRTEM)、紫外-可见吸收光谱(UV-Vis )、振动样品磁强计(VSM)等对其进行表征。以亚甲基蓝(methylene blue,简称MB)为模拟污染物,考察了磁性MCM-41/CdS复合材料的可见光催化性能。结果表明,CdS 能有效地沉积在磁性 MCM-41上,与 CdS 相比,该复合材料对 MB 的光催化降解效率明显提高,且可通过外加磁场进行分离。
Magnetic MCM-41/CdS composite was prepared via a two-step precipitation method through deposi-ting CdS on the magnetic MCM-41.XRD,HRTEM,UV-Vis absorption spectra and VSM were used to charac-terize the magnetic MCM-41/CdS composite.Methylene blue(MB)aqueous solution was used as a probe to evaluate the visible-light photocatalytic activity of magnetic MCM-41/CdS composite.The results showed that CdS was successfully deposited on the magnetic MCM-41,and magnetic MCM-41/CdS composite had higher visible-light photocatalytic activity than pure CdS.In addition,MCM-41/CdS composite could be easily separa-ted in an external magnetic field.
参考文献
| [1] | Meissner D;Benndorf C;Memming R .Photocorrosion of cadmium sulfide:analysis by photoelectron spectroscopy[J].Applied Surface Science,1987,27:423-436. |
| [2] | Dimitrijevi N M;Li S;Gr?tzel M .Visible light induced oxygen evolution in aqueous CdS suspensions[J].Journal of the American Chemical Society,1984,106:6565-6569. |
| [3] | K?nig H P;Heinrich U;Kock H et al.Effect of photo-corrosion on cadmium sulfide suspensions applied in ani-mal inhalation studies with CdS particles[J].Archives Environmental Contamimation and Toxicology,1992,22:30-35. |
| [4] | 杜娟,李越湘,彭绍琴,吕功煊,李树本.用水热、溶剂热方法制备纳米CdS粒子及其光催化性能[J].功能材料,2005(10):1603-1606. |
| [5] | Xu Wei;Liao Yanting;Daniel L A .Formation of CdS nanoparticles within modified MCM-41 and SBA-15[J].Journal of Physical Chemistry B,2002,106:11127-11131. |
| [6] | Zhang Zongtao;Dai Sheng;Fan Xudong et al.Con-trolled synthesis of CdS nanoparticles inside ordered me-soporous silica using ion-exchange reaction[J].Journal of Physical Chemistry B,2001,105(29):6755-6758. |
| [7] | 杨佑浩,任楠,杨志剑,张亚红,唐颐.介孔氧化硅负载纳米硫化镉光催化剂制备及其可见光氧化性能[J].复旦学报（自然科学版）,2008(04):524-528,534. |
| [8] | Shen Shaohua;Guo Liejin .Growth of quantum-confined CdS nanoparticles inside Ti-MCM-41 as a visible lighttphotocatalyst[J].Materials Research Bulletin,2008,43:437-446. |
| [9] | V. Belessi;D. Lambropoulou;I. Konstantinou .Structure and photocatalytic performance of magnetically separable titania photocatalysts for the degradation of propachlor[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2009(3/4):181-189. |
| [10] | Liu Xiaowang;Feng Zhen;Zhang Xiaojun et al.Prepa-ration and characterization of Fe3 O4/CdS nanocompos-ites and their use as recyclable photocatalysts[J].Crys-tal Growth & design,2008,9(01):197-202. |
| [11] | Ningzhong Bao;Liming Shen;Tsuyoshi Takata .Self-Templated Synthesis of Nanoporous CdS Nanostructures for Highly Efficient Photocatalytic Hydrogen Production under Visible Light[J].Chemistry of Materials: A Publication of the American Chemistry Society,2008(1):110-117. |
| [12] | Xinqing Chen;Koon Fung Lam;Qingjian Zhang .Synthesis of Highly Selective Magnetic Mesoporous Adsorbent[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2009(22):9804-9813. |
| [13] | Thiam Peng Ang;Choon Sian Ton;Yi-Fan Han .Synthesis, Characterization, and Activity of Visible-Light-Driven Nitrogen-Doped TiO2-SiO2 Mixed Oxide Photocatalysts[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2009(24):10560-10567. |
| [14] | M.Cozzolino;M.Di Serio;R.Tesser .Grafting of titanium alkoxides on high-surface SiO2 support: An advanced technique for the preparation of nanostructured TiO2/SiO2 catalysts[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2007(2):256-262. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%