微波辅助法合成S掺杂g-C_3N_4降解孔雀石绿染料废水
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摘要
通过微波辅助热解分别制备了g-C3N4及S掺杂g-C3N4催化材料,采用N2保护法合成了S掺杂g-C3N4催化材料。利用X射线粉末衍射仪(XRD)、透射电镜(TEM)、紫外可见漫反射(UV-Vis DRS)、傅里叶红外光谱(FTIR)及X射线光电子谱(XPS)对样品进行了表征,并分析了材料对孔雀石绿废水的光催化降解效果。结果表明,微波辅助热解制备的S掺杂g-C3N4光催化降解效果最佳。对质量浓度为10mg/L的孔雀石绿废水在投加S掺杂gC3N4为1g/L的条件下,经过3h光照对孔雀石绿的降解可达90%。
S-doped g-C3N4 and g-C3N4 were successfully prepared via microwave-assisted pyrolysis.S-doped g-C3N4 was successfully prepared via N2 protection method.The samples were characterized by X-ray diffraction(XRD),transmission electron microscope(TEM),UV-visible diffuse reflection spectroscopy(UV-vis DRS),Fourier transform infrared spectroscopy(FT-IR)and X-ray photo-electron spectrometer(XPS).And photocatalytic activity of materials were investigated by degradation of malachite green wastewater.The results indicated that the s-doped g-C3N4 fabricated by microwave-assisted pyrolysis exhibited the highest photocatalytic activity.Under malachite green wastewater(10mg/L)and S-doped g-C3N4 addition amount(1g/L)condition,more than 90% of malachite green was degraded over the photocatalyst after 3h.
S-doped g-C3N4 and g-C3N4 were successfully prepared via microwave-assisted pyrolysis.S-doped g-C3N4 was successfully prepared via N2 protection method.The samples were characterized by X-ray diffraction(XRD),transmission electron microscope(TEM),UV-visible diffuse reflection spectroscopy(UV-vis DRS),Fourier transform infrared spectroscopy(FT-IR)and X-ray photo-electron spectrometer(XPS).And photocatalytic activity of materials were investigated by degradation of malachite green wastewater.The results indicated that the s-doped g-C3N4 fabricated by microwave-assisted pyrolysis exhibited the highest photocatalytic activity.Under malachite green wastewater(10mg/L)and S-doped g-C3N4 addition amount(1g/L)condition,more than 90% of malachite green was degraded over the photocatalyst after 3h.
引文
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[3]张芬,柴波,柳兵仁.RGO/C3N4复合材料的制备及可见光催化性能[J].无机化学学报,2014,30(4):821-827.
[4]WANG D,SUN H,LUO Q,et al.An efficient visiblelight photocatalyst prepared from g-C3N4 and polyvinyl chloride[J].Applied Catalysis B-Environmental,2014,156:323-330.
[5]LI J,SHEN B,HONG Z,et al.A facile approach to synthesize novel oxygen-doped g-C3N4 with superior visible-light photoreactivity[J].Chemical Communications,2012,48(98):12017-12019.
[6]陈强,张春渤,谢建生.离子束增强沉积制备Li掺杂ZnO薄膜[J].常州大学学报(自然科学版),2014,26(1):6-9.
[7]栾勇,傅平丰,戴学刚,等.金属离子掺杂对TiO2光催化性能的影响[J].化学进展,2004,16(5):738-746.
[8]李新玲,胡晓霞,李戎,等.微波法制备磷酸锆的研究[J].广州化工,2014,42(24):56-60.
[9]马建峰,黄代琴,邹静,等.活性炭纤维负载Ag3PO4光催化剂的可见光催化性能[J].常州大学学报(自然科学版),2015,27(2):45-50.
[10]YANG M,FENG J,HUANG Q.Influence of mechanical milling on photocatalytic activity of g-C3N4 prepared by heating melamine[J].Journal of Wuhan University of Technology-Materials Science Edition,2010,25(6):914-918.
[11]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.
[12]桂明生,王鹏飞,袁东,等.Bi2WO6/g-C3N4复合型催化剂的制备及其可见光光催化性能[J].无机化学学报,2013,29(10):2057-2064.
[13]GE L,HAN C,XIAO X,et al.Enhanced visible light photocatalytic hydrogen evolution of sulfur-doped polymeric g-C3N4photocatalysts[J].Materials Research Bulletin,2013,48(10):3919-3925.
[14]CAO L,WANG R,WANG D.Synthesis and characterization of sulfur self-doped g-C3N4 with efficient visible-light photocatalytic activity[J].Materials Letters,2015,149:50-53.
[15]朱雷,罗李陈,汪恂.Eu掺杂ZnO光催化剂降解制药废水[J].环境工程学报,2015,9(4):1689-1702.
[16]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.
[17]郑华荣,张金水,付贤智.二氨基马来腈共聚合改性氮化碳光催化剂[J].物理化学学报,2012(10):2336-2342.
[18]JIANG D,ZHU J,CHEN M,et al.Highly efficient heterojunction photocatalyst based on nanoporous g-C3N4sheets modified by Ag3PO4 nanoparticles:Synthesis and enhanced photocatalytic activity[J].Journal of Colloid and Interface Science,2014,417:115-120.
[19]DONG F,ZHAO Z,XIONG T,et al.In situ construction of g-C3N4/g-C3N4metal-free heterojunction for enhanced visible-light photocatalysis[J].Acs Applied Materials&Interfaces,2013,5(21):11392-11401.