摘要本论文以SBA-15为模板，乙二胺和四氯化碳为氮源和碳源，制备了有序中孔氮化碳（Mesoporous Carbon Nitride，MCN），通过XRD、N2吸附-脱附、TEM和红外光谱对MCN进行了表征，同时考察了MCN对水中Cr(VI)的吸附性能。结果表明：MCN具有高度有效的中孔结构，孔径和比表面积分别为4.24 nm和447.3 m2/g；酸性条件有利于MCN对Cr(VI)的吸附；随着MCN投加量的增加，Cr(VI)的去除率不断增加；升高温度，MCN对Cr(VI)的吸附量也随之增加；溶液中存在的SO42-、NO3-和Cl-对MCN吸附Cr(VI)具有抑制作用，其中SO42-的抑制作用较大。63860

毕业论文关键词：MCN; Cr (VI); 吸附; pH; 温度

 Preparation and adsorption properties of mesoporous carbon nitride

Abstract In this thesis we use SBA-15 as template, ethylenediamine and carbon tetrachloride as nitrogen and carbon sources, preparation of ordered Mesoporous Carbon Nitride        (MCN),the MCN were characterized by XRD, nitrogen adsorption-desorption experiment, TEM, IR spectra, and also investigated the adsorption properties of MCN adsorpted Cr(VI) in water. The results showed that: MCN has a highly effective mesoporous structure , pore size and specific surface areas were 4.24 nm and 447.3 m2/g; it conducive to the adsorption of Cr(VI) by MCN under acidic conditions; Cr(VI)removal rate increased with the increase of MCN dosage; the temperature rises, the adsorption of Cr(VI) onto MCN increases; the SO42-、NO3- and Cl- in the aqueous solution will inhibite the adsorption of Cr(VI) onto MCN ,in which the inhibition of SO42- is larger.

Keywords： MCN; Cr (VI); adsorption; pH; temperature

 目  录

1 引言 1

1.1 背景 1

1.2国内外研究现状 2

1.2.1中孔碳材料的制备方法 2

1.2.2 中孔碳材料的功能化 4

1.3 本课题方案 6

2实验部分 6

2.1 实验仪器与试剂 6

2.1.1 仪器 6

2.1.2 试剂 7

2.2 中孔氮化碳（MCN）的制备 7

2.2.1 SBA-15的合成 7

2.2.2 MCN的合成 7

2.2 MCN的表征 7

2.3 六价铬Cr(VI)的吸附实验 8

2.3.1 Cr(VI)的测定方法 8

2.3.2 标准曲线的测定 8

2.3.3 振荡时间对吸附Cr(VI)的影响（吸附动力学研究） 9

2.3.4 MCN吸附不同初始浓度Cr(VI)的效率比较（吸附等温线研究） 10

2.3.5 MCN用量对Cr(VI)吸附效果的影响 10

2.3.6 pH值对MCN吸附Cr(VI)效率的影响 10

2.3.7 温度对MCN吸附Cr(VI)的影响 10

2.3.8 共存离子对MCN吸附Cr(VI)的影响 11

3 结果讨论与分析 11

3.1 MCN样品的表征 11

3.1.1 XRD表征 11

3.1.2 MCN样品的N2吸附-脱附曲线 12

3.1.3 SEM和TEM分析 12

3.1.4 红外（FTIR）分析