采用溶胶-凝胶法和浸渍法制备 Mn 掺杂TiO2负载竹质活性炭纤维(Mn/Ti-BACF)光催化复合材料,利用扫面电镜(SEM)、X 射线衍射仪(XRD)、傅立叶变换红外光谱(FT-IR)、紫外-可见光分光光度计(UV-Vis)等考察了 Mn 掺杂量对 Mn/Ti-BACF 复合材料结构和可见光光催化性能的影响。结果发现, Mn掺杂改善了TiO2在竹质活性炭纤维表面的负载；Mn离子的掺杂并没有改变样品基材的碳网结构,也未出现新的Mn—O 的特征吸收峰。随着 Mn 掺杂浓度的增加,Mn/Ti-BACF样品中 TiO2粒径逐渐减小,可见光下的吸光度先增加后减少。当n(Mn)∶n(Ti)＝1∶200时,样品在可见光下对亚甲基蓝的降解率达到了97．7％。
Mn-doped TiO2 loaded on bamboo based activated carbon fibers (Mn/Ti-BACF)were prepared by sol-gel and impregnationmethod.The effects of Mn doping amount on the structure andvisible light photocatalyt-icproperties of Mn/Ti-BACF were investigated by SEM,XRD,FT-IR and UV-Vis.The results show that Mn doping could improve the loading rate of TiO2 on the Mn/Ti-BACF surface.It was not found in Mn/Ti-BACF that thecarbon net constructionwas changed due to the Mn doping,and the Mn-O adsorption peak was discov-ered.With the Mn doping amount increasing,the TiO2 diameters in Mn/Ti-BACF gradually decreased,and the visible light absorption of Mn/Ti-BACF increased and then decreased.When the ratio of Mn to Tiin Mn/Ti-BACF was 1∶200,the photodegradation ratio of methylene blue was up to 97.7% under the visible light condi-tion.
参考文献
| [1] | Hou HongMei;Miyafuji H;Kawamoto H;Saka S .Supercritically treated TiO2-activated carbon composites for cleaning ammonia.[J].Journal of wood science,2006(6):533-538. |
| [2] | Li DongNa;Ma XiaoJun .Preparation and photocatalystic property of Nano-TiO<sub>2</sub> loaded activated carbon fibers from liquefied wood.[J].Wood Research,2014(1):77-84. |
| [3] | Anpo M.;Takeuchi M. .The design and development of highly reactive titanium oxide photocatalysts operating under visible light irradiation [Review][J].Journal of Catalysis,2003(1/2):505-516. |
| [4] | Sambrano JR;Nobrega GF;Taft CA;Andres J;Beltran A .A theoretical analysis of the TiO2/Sn doped (110) surface properties[J].Surface Science: A Journal Devoted to the Physics and Chemistry of Interfaces,2005(1/3):71-79. |
| [5] | 王树峰,朱启安,陈万平,孙旭峰,张琪.掺Fe3+附银二氧化钛光催化剂的制备及其光催化活性研究[J].功能材料,2007(02):179-182. |
| [6] | Choi A Y;Han C H .A study on the band gap and the do-ping level of V-doped TiO2 with respect to the visible-light photocatalyticactivity[J].Journal of Nanoscience and Nanotechnology,2014,14:8070-8073. |
| [7] | Osei P B;Lu X M;Xie J M et al.Synthesis,characteri-sation and application of copper modyfied brookite titania-photocatalys tactivated by visible light[J].Journal of Nanoscience and Nanotechnology,2014,14:7045-7053. |
| [8] | Chen Yong;Chen Peng;Chen Chao et al.Preparation and properties of La and Fe co-doping TiO2/ACF compos-ite photocatalys[J].Journal of Functional Materials,2014,45(3):3135-3139. |
| [9] | Li D;Ma X;Liu X et al.Preparation and characteriza-tion of nano-TiO2 loaded bamboo-based activated carbon fibers by H2 O activation[J].Bio Resource,2014,9:602-612. |
| [10] | 李冬娜,马晓军.活化工艺对木质活性炭纤维结构和碘吸附性能的影响[J].功能材料,2013(17):2565-2569. |
| [11] | Inagaki M;Hirose Y;Matsunaga T et al.Carbon coat-ings of anatase-type TiO2 through their precipitation in PVA aqueous solution[J].CARBON,2003,41:2619-2624. |
| [12] | Baifu Xin;Zhiyu Ren;Peng Wang;Jia Liu;Liqiang Jing;Honggang Fu .Study on the mechanisms of photoinduced carriers separation and recombination for Fe~(3+)-TiO_2 photocatalysts[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2007(9):4390-4395. |
| [13] | 曹江林,吴祖成,曹发和,张鉴清.阴极共电沉积法制备Fe3+掺杂TiO2纳米薄膜及其可见光活性[J].无机材料学报,2007(03):514-518. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%