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石墨烯改性铌酸钾纳米管的制备及其光催化性能研究

时间:2018-01-11 16:46来源:毕业论文
论文以五氧化二铌,K2CO3为原料通过高温固相法制备结晶性优良、纯度高的铌酸钾颗粒。通过酸化搅拌将铌酸钾颗粒剥落成片,再加入四丁基氢氧化铵作为模板剂将剥离的片进一步卷曲成
摘要:本毕业论文以五氧化二铌,K2CO3为原料通过高温固相法制备结晶性优良、纯度高的铌酸钾颗粒。通过酸化搅拌将铌酸钾颗粒剥落成片,再加入四丁基氢氧化铵作为模板剂将剥离的片进一步卷曲成铌酸钾纳米管。以改进的Hummers法制备石墨烯,并通过搅拌将石墨烯负载于铌酸钾纳米管上。进而以罗丹明B为降解底物,研究石墨烯改性的铌酸钾纳米管对罗丹明B的光催化降解的性能。实验结果表明,加入200 mg的催化剂,将200 mL 20 mg/L的罗丹明B溶液完全降解,纯的铌酸钾纳米管约需2 h,而负载1 wt%石墨烯的铌酸钾纳米管只需要约1 h。因此,相对于纯的铌酸钾纳米管,负载一定量石墨烯的铌酸钾纳米管的紫外光光催化性能明显提高。17506
关键词:高温固相法;铌酸钾;纳米管;石墨烯;紫外光光催化
 The preparation and photocatalytic property of the graphene loaded potassium niobate nanotube
Abstract: This article use niobium pentoxide, K2CO3 as raw materials by high temperature solid phase method to prepare potassium niobate which is small and uniform particle size. By acidification stirring the lamellar structure of potassium niobate particles peel off into pieces, and then add tetrabutyl ammonium hydroxide as the templating agent to let pieces further curl into potassium niobate nanotubes. Use the improved Hummers method to prepare graphene, graphene is load on the surface of potassium niobate nanotubes by mixing. Use Rhodamine B as the simulation of organic wastewater, study the photocatalytic performance of degradation of organic wastewater by graphene loaded potassium niobium nanotube. The experimental results show, by add 200 mg  catalyst, to make 200 mL 20 mg/L Rhodamine B is completely degraded, pure potassium niobate nanotubes takes about 2h, while 1wt% load graphene potassium niobate nanotubes takes about 1h. Thus, compared to pure potassium niobate nanotubes, UV-Vis photocatalytic properties of potassium niobate nanotubes loaded with certain amount of graphene has improved significantly.

源自六/维-论;文;网!加7位QQ324,9114 www.lwfree.cn


Keyword:High-temperature solid-phase method; nanotubes; potassium niobate; graphene; UV photocatalytic
目  录
1 前言    1
  1.1 课题的目的和意义    1
  1.2 课题的研究背景    2
  1.3 铌酸钾纳米材料制备方法和特点    3
1.3.1 高温固相法    3
1.3.2 前驱体聚合法    3
1.3.3 水热法    3
1.3.4 溶剂热法    4
  1.4 石墨烯的制备方法    4
1.4.1 机械剥离法    4
1.4.2 氧化石墨还原法    5
1.4.3 化学气相沉积法    5
  1.5 铌酸钾光催化剂发展与应用    6
1.6 金属及金属化合物负载铌酸钾体系    6
1.7 立题依据    7
2 实验部分    9
  2.1 仪器与试剂    9
2.1.1 仪器    9
2.1.2 药品与试剂    9
  2.2 实验方法    10
2.2.1 铌酸钾纳米管的制备    10
2.2.2 石墨烯的制备    10
2.2.3 上层铌酸钾纳米管负载石墨烯    11
2.2.4 光催化性能评价    11
3 结果与讨论    12
3.1 样品的表征    12
    3.1.1 样品的XRD分析    12
3.1.2 样品的透射电镜分析    15
3.1.3 样品的固体漫反射紫外可见吸收光谱分析    16
3.2 光催化性能的评价    17
3.2.1 罗丹明B的紫外-可见吸收曲线    17 源自六/维-论;文;网!加7位QQ324,9114 www.lwfree.cn
3.2.2 罗丹明B的吸附-脱附曲线    18 石墨烯改性铌酸钾纳米管的制备及其光催化性能研究:http://www.lwfree.cn/huaxue/20180111/19190.html
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