Study on the mechanism of methylene blue degradation by TiO2 photocatalyst

Abstract

Abstract: In order to carry out the study, the experiments of photodegradation of methylene blue under different conditions were conducted, using different kinds of free radical scavengers, such as (CH₃)₃OH, H₂O₂, KI, NaN₃ and C₆H₄O₂. The effects of these free radical scavengers were observed. The concentration of H₂O₂ generated during the photodegradation of methylene blue by TiO₂ was also reported. And the results of these experiments indicated that the main active oxygen substances in the reaction are ·OH, O^·-₂ and ¹O₂.

Key words: methylene blue, TiO₂, photocatalytic degradation, free radical scavenging, ROS

CLC Number:

X132

ZHANG Dan, XU Bin, ZHU Pei-juan, LIAN Zheng-hao, ZHAO Ya-ping. Study on the mechanism of methylene blue degradation by TiO₂ photocatalyst[J]. Journal of East China Normal University(Natural Sc, 2013, 2013(5): 35-42.

References

［1］ LAKSHMI S, RENGANATHAN R, FUJITA S. Journal of photochemistry and photobiology A［J］. Chemistry, 1995, 88:163-167.

［2］ HEINRICH ZOLLINGER. Color Chemistry:Sythesis,Properties and Application of Organic Dyes and Pigments［M］.3rd ed. Wiley-vch, 2003.

［3］ FUJISHIMA A, HONDA K. Electrochemical photolysis of water at a semiconductor electrode［J］. Nature, 1972,238(5338): 37-38.

［4］倪广红，丰平.纳米二氧化钛光催化的研究进展及应用［J］. 纳米科技，2010，7(2)：81-86.

［5］姚俊，王潮霞.TiO2薄膜的低温制备及紫外光催化降解亚甲基蓝［J］. 水处理技术，2010,36（5）：85-88.

［6］王景芸. 掺杂型纳米TiO2光催化降解亚甲基蓝［J］. 矿治，2010,19（2）：84-87.

［7］张卫华，李晓彤，徐松，等. 二氧化钛光催化效率影响因素的研究［J］. 吉林化工学院学报，2009,26（2）：43-49.

［8］ AMMAR H, HINDA L, MOHAMED K, et al. Photocatalytic degradation pathway of methylene blue in water［J］. Applied Catalysis B:Environmental, 2001,31(2):145-157.

［9］ BENJAMIN J P A C, LINDA A L, PETER K R . Hydrogen peroxide enhanced photocatalytic oxidation of microcystin-LR using titanium dioxide［J］. Applied Catalysis B: Environmental, 2000,25:59-67.

［10］丁敦煌，关鲁雄，杨松青，等. TiO2/H2O2光催化体系降解亚甲基蓝的动力学研究［J］. 中南工业大学学报：自然科学版，2003，34（5）：513-515.

［11］安继斌，冯辉霞，阳海，等. 不同活性物质对光催化降解水中邻苯二甲酸二甲酯动力学的贡献研究［J］. 生态环境学报，2010，19（6）：1369-1373.

［12］朱燕，郁志勇，孙震，等. 过氧化氢和卤离子对亚甲基蓝光学降解的影响［J］.安徽大学学报：自然科学版，2004,28（3）：75-78.

［13］ PATEL K B， WILLSON R L. Semiquinone free radicals and oxygen: Pulse radiolysis study of one electron transfer equilibria［J］. Journal of Chemistry Society, 1973, 69:814-825.

[1]	Jun ZHOU, Qinghua XI, Yiqiang HUANG, Er NIE, Zhuo SUN. Study on the performance of I-doped TiO₂ nanotube arrays for planar photocatalytic fuel cells [J]. Journal of East China Normal University(Natural Science), 2021, 2021(1): 165-175.
[2]	Yuvna Devi PERIANEN, Xi XIAO. The impacts of climate change on the coastal zone of Mauritius [J]. Journal of East China Normal University(Natural Science), 2020, 2020(S1): 104-108.
[3]	LI Jing, YANG Zhenghai, HOU Shunyong, WEI Bin, LIN Qinning, YANG Tao, YIN Jianping. Electrostatic curved mirror of cold molecules [J]. Journal of East China Normal University(Natural Science), 2020, 2020(2): 64-69.
[4]	WANG Jianqiao, LIU dong, ZHOU Jun, XI Qinghua, NIE Er, SUN Zhuo. Application of TiO₂ nanotube arrays for bipolar photocatalytic fuel cells [J]. Journal of East China Normal University(Natural Science), 2020, 2020(1): 93-102.
[5]	LI Lu, LIU Xin-cheng, SONG Yong-gang, ZHAO Geng-run. Study on the safety of sea dikes against coastal erosion in a strong tidal estuary [J]. Journal of East China Normal University(Natural Sc, 2019, 2019(4): 202-211.
[6]	HUANG Xian-zhi, PIAO Xian-qing, CAI Ya-guo. Preparation of photocatalytic materials MIL-125(Ti)/BiOI and photocatalytic performance study [J]. Journal of East China Normal University(Natural Sc, 2019, 2019(1): 93-104,114.
[7]	CHEN Lei-hui, KUANG Jun, CHEN Hui, ZENG Wei, ZHENG Jian-bing, GAO Ming. Techniques for cross-domain recommendation:A survey [J]. Journal of East China Normal University(Natural Sc, 2017, 2017(5): 101-116,137.
[8]	HUANG Pan-hui, ZHANG Xiao-lei, LOU Shi-tao. Thickness related THz-TDS of Fe/Pt heterostructure [J]. Journal of East China Normal University(Natural Sc, 2017, (3): 107-113.
[9]	FANG Juan, LIU Hong-ying, LI Qing-li. Learning distance metrics with dimension constraints [J]. Journal of East China Normal University(Natural Sc, 2017, 2017(2): 69-74,88.
[10]	LIU Zhi-gang, XU Shao-hua, LI Pan-chi. An extreme learning process neural networks based on particle swarm optimization [J]. Journal of East China Normal University(Natural Sc, 2016, 2016(4): 86-95.
[11]	YE Xi-Yun, ZHU Ping-Ya. A review of the studies on melanin synthesis and whitening products [J]. Journal of East China Normal University(Natural Sc, 2016, 2016(2): 1-8.
[12]	MA Lu-Yi. Ambrosetti-Prodi type results of the nonlinear first-order periodic problem [J]. Journal of East China Normal University(Natural Sc, 2015, 2015(6): 53-58.
[13]	WANG Ru-sheng,YANG Shi-lun,LUO Xiang-xin,LU Ye-feng,MIAO Li-min. Morphological evolution and human activities impacts at the mouth area of the North Branch, Yangtze estuary, during the recent three decades [J]. Journal of East China Normal University(Natural Sc, 2015, 2015(4): 34-41.
[14]	ZHANG Xiao-dong,SHEN Si-min,ZHU Shou-xian, ZHANG Wen-jing,HUANG Ji-wen. Analysis of the coastal erosion and accretion in Haikou Bay by remote sensing [J]. Journal of East China Normal University(Natural Sc, 2015, 2015(4): 42-53.
[15]	HU Meng-Wei, HUANG Zhi-Gang, SUN Gui-Rong. An oscillation result for some higher order linear differential equations [J]. Journal of East China Normal University(Natural Sc, 2015, 2015(1): 75-83.

Study on the mechanism of methylene blue degradation by TiO₂ photocatalyst

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments