Synthesis of MWCNT/Bi2WO6 Composite Photocatalyst and Its Photocatalytic Activity
WANG Yongqiang1,2, CHEN Xi1, LIU Xin1, LIU Fang1,2, ZHAO Chaocheng1, JIANG Shan1, WU Pengwei1
1 College of Chemical Engineering, China University of Petroleum(East China), Qingdao 266580 2 State Key Laboratory of Petroleum Pollution Control, China University of Petroleum (East China), Qingdao 266580
Abstract: The MWCNT/Bi2WO6 composite photocatalysts with high photocatalytic activity were successfully synthesized from multiwalled carbon nanotubes and Bi2WO6 via hydrothermal method. The structures and morphology of the samples were characterized by XRD, SEM, TEM, XPS, BET and UV-Vis. The photocatalytic performance of the catalyst was investigated by taking Rhodamine B as the target pollutant. The results indicated that the obtained composite presented orthorhombic crystal structure, the MWCNTs alternately attached to the lamella structure of Bi2WO6 to form the composite. The synthesized MWCNT/Bi2WO6 possessed large specific surface area and narrow band gap, which could effectively inhibit the recombination of photogenerated electrons and holes, increase the quantum transfer efficiency and was more likely to be excited by light. The MWCNT/Bi2WO6 photocatalysts exhibited the best catalytic performance with the loading amount of 2%. Under the simulated sunlight test, the photodegradation efficiency of MWCNT/Bi2WO6 to 10 mg/L Rhodamine B could reach as high as 98.8%.
1 Condie A G, Gonzálezgómez J C. Journal of the American Chemical So-ciety,2010,132(5),1464. 2 Chong M N, Jin B, Chow C W, et al. Water Research,2010,44(10),2997. 3 Guo S, Li X, Wang H, et al. Journal of Colloid & Interface Science,2012,369(1),373. 4 Nakata K, Fujishima A. Journal of Photochemistry & Photobiology C Photochemistry Reviews,2012,13(3),169. 5 Fagan R, Mccormack D E, Dionysiou D D, et al. Materials Science in Semiconductor Processing,2016,42,2. 6 Gao E, Wang W, Shang M, et al. Physical Chemistry Chemical Physics,2011,13(7),2887. 7 And C Z, Zhu Y. Chemistry of Materials,2005,17(13),3537. 8 Shang M, Wang W, Zhang L, et al. Journal of Physical Chemistry C,2009,113(33),14727. 9 Takeda H, Nishida T, Okamura S, et al. Journal of the European Cera-mic Society,2005,25(12),2731. 10 Tian Y, Chang B, Lu J, et al. Powder Technology,2014,267(15),126. 11 Saison T, Chemin N, Chanéac C, et al. Journal of Physical Chemistry C,2011,115(13),5657. 12 Qiu S, Zhao B X, et al. Journal of Function Materials,2017,48(5),05089(in Chinese). 邱爽,赵彬侠,等.功能材料,2017,48(5),05089. 13 Zhao G, Liu S, Lu Q, et al. Journal of Sol-Gel Science and Technology,2013,66(3),406. 14 Shi R, Huang G, Lin J, et al. Journal of Physical Chemistry C,2009,113(45),19633. 15 Ju P, Wang P, Li B, et al. Chemical Engineering Journal,2014,236(2),430. 16 Tian N, Zhang Y, Huang H, et al. Journal of Physical Chemistry C,2014,118(29),15640. 17 Li X J, Sheng J Y, Chen H H, et al. Acta Physico-Chimica Sinica,2015,31(3),540(in Chinese). 李晓金,盛珈怡,陈海航,等.物理化学学报,2015,31(3),540. 18 Guo D, Wang P, Zheng Q Y, et al. Journal of Inorganic Materials,2014,29(11),1193(in Chinese). 郭丹,王苹,郑琪颖,等.无机材料学报,2014,29(11),1193. 19 Li M, Zhang L, Fan X, et al. Journal of Materials Chemistry A,2015,3(9),5189. 20 Zhang R B, Liang L, Zeng X R, et al. Acta Physico-Chimica Sinica, 2012,28(8),1951(in Chinese). 张荣斌,梁蕾,曾宪荣,等.物理化学学报,2012,28(8),1951. 21 Wang W, Serp P, Kalck P, et al. Materials Research Bulletin,2008,43(4),958. 22 Yuan B, Wei J X, Hu T J, et al. Chinese Journal of Catalysis,2015,36(7),1009(in Chinese). 原博,魏江霞,胡天娇,等.催化学报,2015,36(7),1009. 23 Xu C, Wei X, Ren Z, et al. Materials Letters,2009,63(26),2194. 24 Dong M, Wu J, Gao M, et al. Chemical Engineering Journal,2016,290,136. 25 Gui M S, Wang P F, Yuan D, et al. Chinese Journal of Inorganic Che-mistry,2013,29(10),2057(in Chinese). 桂明生,王鹏飞,袁东,等.无机化学学报,2013,29(10),2057. 26 Zhang L, Wang H, Chen Z, et al. Applied Catalysis B Environmental,2011,106(1-2),1.