碳量子点/TiO_2复合材料的制备及性能研究
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摘要
以丙三醇为碳源采用一步微波法制备碳量子点(CQDs)溶液;以四氯化钛和硅酸钠为钛源和硅源用水解法制备二氧化钛(TiO_2)/二氧化硅(SiO_2),TiO_2/SiO_2经强碱刻蚀后加入CQDs溶液进行真空复合制备CQDs/TiO_2复合材料。并对CQDs/TiO_2进行形貌结构表征,同时探讨CQDs/TiO_2在普通白炽灯照射下对亚甲基蓝的降解吸附效果。在普通白炽灯照射条件下,0.1g CQDs/TiO_2对25mL 20mg/L的亚甲基蓝溶液吸附降解率达到90.36%,比TiO_2/SiO_2和TiO_2的降解率分别提高3.141倍和0.2261倍。
Used glycerol as carbon source,carbon quantum dots's solution(CQDs)was prepared by one-step microwave,and TiO_2/SiO_2was prepared by hydrolysis with titanium and silicon source whose raw matetials were titanium tetrachloride and sodium silicate,at last CQDs/TiO_2composite materials were prepared by reaction of TiO_2which was etched by alkali and carbon quantum solution at vacuum.The morphology and structure of CQDs/TiO_(2 )were characterized,at the same time,the adsorption and degradation of CQDs/TiO_(2 )on the methylene blue under the irradiation of common incandescent lamp were investigated.The adsorption-degradation of methylene blue at 0.1g CQDs/TiO_2on 25mL 20mg/L solution could reach to 90.36%under common incandescent lamp,which was increased by 3.141times and 0.2261times than that of original TiO_2/SiO_2and TiO_2.
Used glycerol as carbon source,carbon quantum dots's solution(CQDs)was prepared by one-step microwave,and TiO_2/SiO_2was prepared by hydrolysis with titanium and silicon source whose raw matetials were titanium tetrachloride and sodium silicate,at last CQDs/TiO_2composite materials were prepared by reaction of TiO_2which was etched by alkali and carbon quantum solution at vacuum.The morphology and structure of CQDs/TiO_(2 )were characterized,at the same time,the adsorption and degradation of CQDs/TiO_(2 )on the methylene blue under the irradiation of common incandescent lamp were investigated.The adsorption-degradation of methylene blue at 0.1g CQDs/TiO_2on 25mL 20mg/L solution could reach to 90.36%under common incandescent lamp,which was increased by 3.141times and 0.2261times than that of original TiO_2/SiO_2and TiO_2.
引文
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[5]陈孝云,陆东芳,张淑惠,等.SiO2负载氮掺杂TiO2可见光响应光催化剂的制备及性能[J].无机化学学报,2012,28(2):307-313.
[6]Wang W S,Wang D H,Qu W G,et al.Large ultrathin anatase TiO2nanosheets with exposed{001}facets on graphene for enhanced visible light photocatalytic activity[J].J Phys Chem C,2012,116(37):19893-19901.
[7]Li T Y,Tian B Z,Zhang J L,et al.Facile tailoring of anatase TiO2 morphology by use of H2O2;from micro owers with dominant{101}facets to microspheres with exposed{001}facets[J].Ind Eng Chem Res,2013,52(20):6704-6712.
[8]Wang W,Ni Y R,Xu Z Z.One-step uniformly hybrid carbom quantum dots with high-reactive TiO2for photocatalyticapplication[J].J Alloys Compd,2015,622:303-308.
[9]Fernando K A,Sahu S,Liu Y,et al.Carbon quantum dots and applications in photocatalitic energy conversion[J].Applied Materials&Interfaces,2015,7(16):8363-8376.
[10]Wang Y,Hu A.Carbon quantum dots:synthesis,properties and applications[J].J Mater Chem C,2014(34):6921-6939.
[11]Sk M A,Ananthanarayanan A,Huang L,et al.Revealing the tunable photoluminescence properties of graphene quantum dots[J].Journal of Materials Chemistry C,2014,2(34):6954-6960.
[12]Wang H X,Xiao J,Yang Z,et al.Rational design of nitrogen and sulfur co-doped carbon dots for efficient photoelectrical conversion applications[J].J Mater Chem A,2015,3:11287-11293.
[13]Jahan S,Mansoor F,Naz S,et al.Oxidative synthesis of highly fluorescent boron/nitrogen co-doped carbon nanodots enabling detection of photosensitizer and carcinogenic dye[J].Anal Chem,2013,85:10232-10239.
[14]Ma Z,Ming H,Huang H,et al.One-step ultrasonic synthesis of uorescent N-doped carbon dots from glocose and their visible-light sensitive photocatalytic ability[J].New J Chem,2012(4):861-864.
[15]Tyagi A,Tripathi K M,Singh N,et al.Green synthesis of carbon quantum dots from lemon peel wast:applications in sensing and photocatalysis[J].RSC Adv,2016,6:72423-72432.
[16]崔佳丽,高永华,高利珍.SDP法制备碳纳米管-TiO2纳米复合光催化剂及降解喹啉[J].新型炭材料,2016,31(4):399-406.