采用沉淀法制备了一系列不同 PbS 担载量的PbS/K2 La2 Ti3 O10复合光催化剂。利用 X 射线衍射(XRD)、场发射扫描电镜(SEM)、透射电镜(TEM)、X射线荧光光谱仪(XRF)、紫外-可见漫反射(UV-Vis)、X射线光电子能谱(XPS)和分子荧光光谱(PL)等技术对催化剂进行表征。以可见光下降解罗丹明B为研究对象,考察了催化剂负载量和投加量对光催化活性的影响。结果表明,PbS的担载扩展了K2 La2 Ti3 O10对可见光的响应,催化活性明显提高,0.35 g PbS(25%,质量分数)/K2 La2 Ti3 O10在可见光下反应2h后降解率可达71.4%。
A series of PbS/K2 La2 Ti3 O10 composite photocatalysts with different PbS content were prepared via a facile precipitation method.The prepared samples were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),transmission electron microscopy (TEM),X-ray fluorescence spectrometer (XRF),ultraviolet-visible diffuse reflection (UV-Vis),X-ray photoelectron spectroscopy (XPS)and photolu-minescence measurement (PL).The photocatalytic activities of the catalysts were evaluated by photocatalytic degradation of Rhodamin B under visible light irradiation.The effect of PbS content and dosage of catalyst for photocatalytic degradation Rhodamin B were also investigated.The results revealed that the PbS/K2 La2 Ti3 O10 composites greatly improved the photocatalyst activity under visible light.The photocatalytic activity of degra-dation of Rhodamin B for 0.35 g (25wt%)PbS/K2 La2 Ti3 O10 composite photocatalyst was 71.4% under visible light irradiation for 2 h.
参考文献
| [1] | Xi Li;Jian Zhu;Hexing Li.Comparative study on the mechanism in photocatalytic degradation of different-type organic dyes on SnS2 and CdS[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2012:174-181. |
| [2] | Tingjiang Yan;Liping Li;Guangshe Li;Yunjian Wang;Wanbiao Hu;Xiangfeng Guan .Porous SnIn_4S_8 microspheres in a new polymorph that promotes dyes degradation under visible light irradiation[J].Journal of hazardous materials,2011(1):272-279. |
| [3] | 李毅斌 .新型层状钙钛矿复合材料铌钽钙酸系列的合成及性质研究[D].华侨大学,2006. |
| [4] | 朱启安,宋方平,陈万平,张琪,孙旭峰.太阳能光解水制氢催化剂无机层状化合物研究进展[J].硅酸盐通报,2006(05):128-132. |
| [5] | Wenquan Cui,Yueli Qi,Li Liu,Dipak Rana,Jinshan Hu,Yinghua Liang.Synthesis of PbS-K2La2Ti3O10 composite and its photocatalytic activity for hydrogen production[J].自然科学进展（英文版）,2012(02):120-125. |
| [6] | Jihuai Wu;Yunfang Huang;Taohai Li .Synthesis and Photocatalytic Properties of Layered Nanocomposite H_2La_2Ti_3O_(10)/Fe_2O_3[J].Scripta materialia,2006(7):1357-1362. |
| [7] | 崔文权,齐跃丽,胡金山,刘利,梁英华.微波辅助制备CdS插层K2La2Ti3010复合物及其光催化制氢的性能[J].化学学报,2012(06):691-698. |
| [8] | 梁英华,崔文权,刘利,齐跃丽.CdS-K2La2Ti3-xAgxO10复合物及其光催化制氢的性能[J].功能材料,2013(07):974-978. |
| [9] | 王小英,刘博,汤玉峰,苏韩杰,韩洋,孙润仓.累托石/聚合物纳米复合材料的新进展[J].无机材料学报,2012(02):113-121. |
| [10] | Intercalation of n-C_(12)H_(25)NH_2 into layered titanate with the aid of microwave radiation[J].Materials Letters,2009(23):2022-2024. |
| [11] | Jana S;Thapa R;Maity R;Chattopadhyay KK .Optical and dielectric properties of PVA capped nanocrystalline PbS thin films synthesized by chemical bath deposition[J].Physica, E. Low-dimensional systems & nanostructures,2008(10):3121-3126. |
| [12] | Brahimi R;Bessekhouad Y;Bouguelia A;Trari M .Improvement of eosin visible light degradation using PbS-sensititized TiO2[J].Journal of Photochemistry and Photobiology, A. Chemistry,2008(2/3):173-180. |
| [13] | Cui W Q;Qi Y L;Hu J S et al.The synthesis,charac-terization and photocatalytic property of K2 La2 Ti3 O10[J].Advanced Materials Research,2011,415-417:1992-1995. |
| [14] | 李涛海,吴季怀,林建明,程应汉.酸化对层状K2La2Ti3O10光催化活性的影响[J].感光科学与光化学,2004(02):120-125. |
| [15] | Dong LH;Chu Y;Liu Y;Li MY;Yang FY;Li LL .Surfactant-assisted fabrication PbS nanorods, nanobelts, nanovelvet-flowers and dendritic nanostructures at lower temperature in aqueous solution[J].Journal of Colloid and Interface Science,2006(2):503-510. |
| [16] | E. Talik;M. Kruczek;H. Sakowska .XPS studies of chemically etched surfaces of (La,Sr)(Al,Ta)O_3 single crystals[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2003(1/2):282-288. |
| [17] | Su, C.;Shao, C.;Liu, Y. .Electrospun nanofibers of TiO_2/CdS heteroarchitectures with enhanced photocatalytic activity by visible light[J].Journal of Colloid and Interface Science,2011(1):220-227. |
| [18] | Wenquan Cui;Shanshan Ma;Li Liu.CdS-sensitized K2Ti4O9 composite for photocatalytic hydrogen evolution under visible light irradiation[J].Journal of molecular catalysis, A. Chemical,2012:35-41. |
| [19] | Weifeng Yao;Xiulan Song;Cunping Huang .Enhancing solar hydrogen production via modified photochemical treatment of Pt/CdS photocatalyst[J].Catalysis Today,2013(1):42-47. |
| [20] | Pulakesh Bera;Sang II Seok .Nanocrystalline copper sulfide of varying morphologies and stoichiometries in a low temperature solvothermal process using a new single-source molecular precursor[J].Solid state sciences,2012(8):1126-1132. |
| [21] | Katoh M;Aihara H;Horikawa T;Tomida T .Spectroscopic study for photocatalytic decomposition of organic compounds on titanium dioxide containing sulfur under visible light irradiation[J].Journal of Colloid and Interface Science,2006(2):805-809. |
| [22] | Cao Jing;Xu Benyan;Luo Bangde et al.Novel BiOI/BiOBr heteroj unction photocatalysts with enhanced visi-ble lighttphotocatalytic properties[J].Catalysis Commu-nications,2011,13(1):63-68. |
| [23] | 吴晶,周文芳,高攀,朱忠其,柳清菊.Pr-TiO2光催化剂的制备与性能研究[J].功能材料,2010(04):562-565,569. |
| [24] | 魏月琳,黄昀昉,范乐庆,黄妙良,吴季怀.钙钛矿镧钛酸钾电子结构的第一性原理研究[J].矿物学报,2009(03):327-332. |
| [25] | Changlin Yu;Kai Yang;Jimmy C. Yu .Fast fabrication of Co_3O_4 and CuO/BiVO_4 composite photocatalysts with high crystallinity and enhanced photocatalytic activity via ultrasound irradiation[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2011(13):4547-4552. |
| [26] | S.K. Kansal;M. Singh;D. Sud .Studies on photodegradation of two commercial dyes in aqueous phase using different photocatalysts[J].Journal of hazardous materials,2007(3):581-590. |
| [27] | 刘千钧,余煜棉,张音波,李新军.TiO2光催化降解甲基橙若干反应条件的研究[J].环境科学与技术,2003(06):13-14,17. |
| [28] | Gui Mingsheng;Zhang Weide .A facile preparation strat-egy for hollow-structured Bi2 O3/Bi2 WO6 heterojunction with high visible lighttphotocatalytic activity[J].Journal of Physics and Chemistry of Solids,2012,73(11):1342-1349. |
| [29] | HE Zhong,YANG Shaogui,JU Yongming,SUN Cheng.Microwave photocatalytic degradation of Rhodamine B using TiO2 supported on activated carbon: mechanism implication[J].环境科学学报（英文版）,2009(02):268-272. |
| [30] | Dechong Ma;Jingzhe Zhao;Yan Zhao.An easy synthesis of 1D bismuth nanostructures in acidic solution and their photocatalytic degradation of rhodamine B[J].Chemical engineering journal,2012:273-279. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%