Boron doping graphitic carbon nitride used borax,boric acid and boron oxide as boron source.The best doped boron source,the doping temperature and doping ratio were determined by a series of experiments,and the doping treatment method was optimized.The samples were characterized by XRD,UV-Vis,XPS,FT-IR,PL,TEM and SEM.The photocatalytic activity of samples was tested by rhodamine B as degradation pollutant.The results showed that the introduction of boron broadened the response range of visible light,reduced the bandgap width of sample,improved the utilization of visible light,suppressed the recombination of photogenerated electrons and holes,and increased specific surface area.Furthermore,the photocatalytic properties were improved significantly.And the photocatalytic activity of B-CN(1∶6) was the highest,its rate constant of photocatalytic degradation for rhodamine B was 3.1 times of g-C3N4.
[1] Kanan M W,Nocera D G.In situ formation of an oxygen-evolving catalyst in neutral water containing phosphate and CO2+[J].Science,2008,321(5892):102-1075.
[2] Zou Z,Ye J,Sayama K,et al.Direct splitting of water under visible light irradiation with an oxide semiconductor photocatalyst[J].Nature,2001,414(6864):625-627.
[3] Yu C,Li G,Kumar S,et al.Phase transformation synthesis of novel Ag2O/Ag2CO3 heterostructures with high visible light efficiency in photocatalytic degradation of pollutants[J].Advanced Materials,2014,26(6):892-898.
[4] Asahi R,Morikawa T,Ohwaki T,et al.Visible-light photocatalysis in nitrogen-doped titanium oxides[J].Science,2001,293(5528):269-271.
[5] 张金龙,陈锋,田宝柱,等.光催化[M].上海:华东理工大学出版社,2012.
[6] 朱永发,姚文清,宗瑞隆.光催化:环境净化与绿色能源应用探索[M].北京:化学工业出版社,2015.
[7] Fujishima A,Honda K.Electrochemical photolysis of water at a semiconductor electrode[J].Nature,1972,238:37-38.
[8] Wang X C,Maeda K,Thomas a,et al.A metal-free polymeric photocatalyst for hydrogen production from water under visible light[J].Nature Materials,2009,8(1):76-80.
[9] Ham Y,Maeda K,Cha D,et al.Synthesis and photocatalytic activity of poly (triazine imide)[J].Chemistry-An Asian Journal,2013,8(1):218-224.
[10] Schwinghammer K,Tuffy B,Mesch M B,et al.Triazine-based carbon nitrides for visible-light-driven hydrogen evolution[J].Angewandte Chemie International Edition,2013,52(9):2435-2439.
[11] Wang X,Chen X,Thomas A,et al.Metal-containing carbon nitride compounds:a new functional organic-metal hybrid material[J].Advanced Materials,2009,21(16):1609-1612.
[12] Liu G,Niu P,Sun C,et al.Unique electronic structure induced high photoreactivity of sulfur-doped graphitic C3N4[J].Journal of the American Chemical Society,2010,132(33):11642-11648.
[13] Li X H,Baar M,Blechert S,et al.Facilitating room-temoperature Suzuki coupling reaction with light:mott-schottky photocatalyst for C—C coupling[J].Scientific Reports,2013,3(6):1743.
[14] Dai X,Xie M,Meng S,et al.Coupled systems for selective oxidation of aromatic alcohols to aldehydels and reduction of nitrobenzene into aniline using Cds/g-C3N4 photocatalyst under visible light irradiation[J].Applied Catalysis B-Environmental,2014,158:382-390.
[15] Xiang Q J,Yu J G,Jaroniec M.Preparation and rnhanced visible light photocatalytic H2-production activity of graphene/C3N4 composites[J].Journal of Chemical Physics C,2011,115:7355-7363.
[16] 张健,王彦娟,胡绍争.钾离子掺杂对石墨型氮化碳光催化剂能带结构及光催化性能的影响[J].物理化学学报,2015(1):159-165.
[17] 马琳,康晓雪,胡绍争,等.Fe-P共掺杂石墨相氮化碳催化剂可见光下催化性能研究[J].分子催化,2015,29(4):359-368.
[18] Yang S,Gong Y,Zhang J,et al.Exfoliated graphitic carbon nitride nanosheets as efficient catalysts for hydrogen evolution under visible light[J].Advanced Materials,2013,25:2452-2456.
[19] Liu L,Ma D,Zheng H,et al.Synthesis and characterization of microporous carbon nitride[J].Microporous and Mesoporous Materials,2008,110:216-222.
[20] Huang J,Yokoyama R,Yang C,et al.Merrilactone A,a novel neurotrophic sesquiterpene dilactone from illicium merrillianum[J].Tetrahedron Letters,2000,41(32):6111-6114.
[21] Li X Y,Wang D S,Cheng G X,et al.Preparation of polyaniline-modified TiO2 nanoparticles and their photocatalytic activity under visible light illumination[J].Appl Catal B:Environ,2008,81(3/4):267-273.
基金资助
重庆市科学技术委员会基础与前沿研究计划(cstc2014jcyjA2/30017);山区桥梁与隧道工程国家重点实验室培育基地(重庆交通大学)开放基金(CQSLBF-Y15-6,No.CQSLBF-Y14-5);国家内河航道整治工程技术研究中心(重庆交通大学)开放基金(SLK2013A03);交通土木工程材料国家和地方联合工程实验室开放基金(LHSYS-2014-005)
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