Degradation of Rhodamine B by Carbon Nitride Activated Sodium Persulfate under Visible Light Irradiation
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摘要: 本文以尿素为原材料，高温聚合法制备了石墨相氮化碳（g-C3N4）纳米片催化剂，采用X射线衍射（XRD）、紫外可见漫发射（DRS）等对g-C3N4进行表征，研究了可见光下g-C3N4活化过硫酸钠对罗丹明-B的效果，并对降解过程中的影响因素如g-C3N4的投入量、过硫酸钠的投入量进行了考察. 结果表明：g-C3N4在可见光下协同过硫酸钠降解罗丹明-B的效果最佳，反应30分钟后，降解率达到91.67%. 罗丹明-B的降解效率随着g-C3N4和过硫酸钠投加量的增加而提高. 对反应过程中过硫酸钠浓度的滴定结果表明：g-C3N4在可见光下对过硫酸钠有一定的活化效果. 经过四次循环降解实验，g-C3N4催化剂仍然具有较好的活性.
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关键词:
- 可见光
Abstract: In this study, g-C3N4 is synthesized by direct calcination of urea. XRD, DRS was used to characterize its property. Degradation of Rhodamine B by g-C3N4 activated sodium persulfate under visible light is investigated. The dosage of g-C3N4, sodium persulfate in the degradation process was also studied. Results showed that 91.67% of RhB was degraded in 30 min by g-C3N4 activated sodium persulfate under visible light. A positive correlation existed between degradation ratio of RhB and amount of g-C3N4 or sodium persulfate. The results of titration experiment indicate that g-C3N4 is effective for activation of sodium persulfate under visible light. Moreover, g-C3N4 shows good stability after four cycle experiments.-
Keywords:
- visible light
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[J].Applied Catalysis B: Environmental, 2009, 85(3–4):171-179 [16] Do S H, Jo J H, Jo Y H, Lee H K, Kong S H.Application of a peroxymonosulfate Cobalt (PMS/Co(II)) system to treat diesel-contaminated soil [J]. [J].Chemosphere, 2009, 77(8):1127-1131 [17]Wang Y B, Hong C S.Effect of hydrogen peroxide,periodate and persulfate on photocatalysis of 2-chlorobiphenyl in aqueous TiO2[J].Water Research, 1999, 33(9):2031-2036 [18] 孟雅丽.g- C3N4的合成及其光催化研究[D]. 大连理工大学, 2011. [19]Meng Y L.Study on the Preparation and Photocatalysis of Graphitic Carbon Nitrides[D]. Dalian University of Technology, 2011. [20]楚增勇, 原博, 颜廷楠.光催化性能的研究进展[J].无机材料学报, 2014, 29(8):785-794 [21]Chu Z Y, Yuan B, Yan T N.Recent Progress in Photocatalysis of g-C3N4[J].Journal of Inorganic Materials, 2014, 29(8):785-794 [22] 李新斌.NaNbO3、g-C3N4及其复合物的制备、表征和光催化性能研究[D]. 河南大学, 2013. [23]Li X B.Praparation and Characterization of NaNbO3, Graphitic Carbon Nitride g-C3N4 and Their Composite Material[D]. Henan University, 2013. [1] Hori H, Yamamoto A, Hayakawa E, Taniyasu S, Yamashita N, Kutsuna S, Kiatagawa H, Arakawa R.Efficient decomposition of environmentally persistent perfluorocarboxylic acids by use of persulfate as a photochemical oxidant [J].[J].Environmental Science & Technology, 2005, 39(7):2383-2388 [2] Waldemer R H, Tratnyek P G, Johnson R L, Nurmi J T.Oxidation of chlorinated ethenes by heat-activated persulfate: Kinetics and products [J]. [J].Environmental Science & Technology, 2007, 41(3):1010-1015 [3] Liang S H, Kao C M, Kuo Y C, Chen K F.Application of persulfate-releasing barrier to remediate MTBE and benzene contaminated groundwater [J]. [J].Journal of Hazardous Materials, 2011, 185(2-3):1162-1168. [4] Gao Y Q, Gao N Y, Deng Y, Yang Y Q, Ma Y.Ultraviolet (UV) light-activated persulfate oxidation of sulfamethazine in water [J]. [J].Chemical Engineering Journal, 2012, 195-196(none):248-253 [5]Shih Y J, Li Y C, Huang Y H.Application of UVpersulfate oxidation process for mineralization of 2,2,3,3-tetrafluoro-1-propanol[J].Journal of the Taiwan Institute of Chemical Engineers, 2013, 44(2):287-290 [6] Hazime R, Nguyen Q H, Ferronato C, Salvador A, Jaber F, Chovelon J M.Comparative study of imazalil degradation in three systems: UV/TiO2, UV/K2S2O8 and UV/TiO2/K2S2O8 [J].[J].Applied Catalysis B: Environmental, 2014, 144(none):286-291 [7] Yang S Y, Wang P, Yang X, Shan L, Zhang W Y, Shao X T, Niu R.Degradation efficiencies of azo dye Acid Orange 7 by the interaction of heat, UV and anions with common oxidants: Persulfate, peroxymonosulfate and hydrogen peroxide [J].[J].Journal of Hazardous Materials, 2010, 179(1-3):552-558 [8] 杨鑫.活性炭催化过二硫酸盐降解水中难生化有机污染物[D]. 中国海洋大学, 2011. [9]Yang X.Activated Carbon Catalyzed Persulfate Oxidation of Organic Contaminations in Water[D]. Ocean University of China, 2011. [10] 赵进英.零价铁/过硫酸钠体系产生硫酸根自由基氧化降解氯酚的研究[D]. 大连理工大学, 2010. [11]Zhao J Y.Sulfate Radical-based Oxidation of Chlorophenols Using Zero-valent Iron/Sodium Peroxydisulfate System[D]. Dalian University of Technology, 2010. [12] 梁云海.铜氧化物活化过硫酸盐处理水中芳环有机污染物的研究[D]. 华南理工大学, 2013. [13]Liang Y H.Degradation of Aromatic Ring Organic Pollutant in Aqueous Solution with Advanced Oxidation Technology Based on Copper Oxidate Activated Persulfate[D]. South China University of Technology, 2013. [14] Marchesi M, Aravena R, Sra K S, Thomson N R, Otero N, Soler A, Mancini S.Carbon isotope fractionation of chlorinated ethenes during oxidation by Fe2+ activated persulfate [J]. [J].Science of the Total Environment, 2012, 433(none):318-322 [15] Rastogi A, Al-Abed S R, Dionysiou D D.Sulfate radical-based ferrous-peroxymonosulfate oxidative system for PCBs degradation in aqueous and sediment systems [J]. [J].Applied Catalysis B: Environmental, 2009, 85(3–4):171-179 [16] Do S H, Jo J H, Jo Y H, Lee H K, Kong S H.Application of a peroxymonosulfate Cobalt (PMS/Co(II)) system to treat diesel-contaminated soil [J]. [J].Chemosphere, 2009, 77(8):1127-1131 [17]Wang Y B, Hong C S.Effect of hydrogen peroxide,periodate and persulfate on photocatalysis of 2-chlorobiphenyl in aqueous TiO2[J].Water Research, 1999, 33(9):2031-2036 [18] 孟雅丽.g- C3N4的合成及其光催化研究[D]. 大连理工大学, 2011. [19]Meng Y L.Study on the Preparation and Photocatalysis of Graphitic Carbon Nitrides[D]. Dalian University of Technology, 2011. [20]楚增勇, 原博, 颜廷楠.光催化性能的研究进展[J].无机材料学报, 2014, 29(8):785-794 [21]Chu Z Y, Yuan B, Yan T N.Recent Progress in Photocatalysis of g-C3N4[J].Journal of Inorganic Materials, 2014, 29(8):785-794 [22] 李新斌.NaNbO3、g-C3N4及其复合物的制备、表征和光催化性能研究[D]. 河南大学, 2013. [23]Li X B.Praparation and Characterization of NaNbO3, Graphitic Carbon Nitride g-C3N4 and Their Composite Material[D]. Henan University, 2013.
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