纤维素基导电吸附材料的制备及应用表征

摘要本文通过利用廉价生物质材料羧甲基纤维素钠优化仿生制备新型高效的CMC@PANI 复合材料并对优化得到的材料进行了 SEM、BET、XRD、UV-vis、FT-IR、TGA等表征。研究发现 pH=4，CMC 用量2.5g/L，Hemin 浓度为0.05g/L，0.07M H2O2，0.9M 盐酸掺杂，为 CMC@PANI 复合材料合成的最优条件。在此条件下合成的CMC@PANI同时对阴阳离子染料具有较高的吸附效率。此外，研究表明该材料对 pH 和温度有较宽的适应性，染料初始浓度和时间对 CMC@PANI 吸附 MO 的影响效果较为显著。RSM 优化CMC@PANI吸附MO的条件为：pH=7，C0=100mg/L，反应时间为 3h，预测去除率值为99. 5%。该条件下，吸附符合准二级动力学和 Langmuir吸附等温方程，是自发、放热的物理吸附，在 323K时有最大吸附容量 294.12mg/g。与其他生物质吸附材料相比，CMC@PANI吸附容量大、条件温和，是较为理想的新型吸附剂。42427
毕业论文关键词 CMC@PANI 仿生制备吸附染料
Title The Preparation and Application of Cellulose-based PANI Composite Adsorbent
Abstract Biomimetic Synthesis of cellulose-based composite absorbent CMC@PANI were optimized in this paper and the as-prepared absorbent were characteristic by SEM, BET, XRD, UV-vis, FT-IR and TGA. The data obtained from the investigations indicated that the optimal conditions of CMC@PANI preparation is pH=4 adding 2.5g/LCMC, 0.05g/L Hemin and 0.07M H2O2 with 0.9M HCl doped at room temperature under which the CMC@PANI synthesized demonstrated high adsorption efficiency for both anionic and cationic dyes. CMC@PANI showed wide adaptability for MO removal in pH and temperature, while the removal rate was highly dependent on contract time and the initial concentration of dyes. The RSM result suggested that the best adsorption condition for CMC@PANI to remove MO was 3h under pH=7 with an initial concentration of 100mg/L, of which the removal ratio is predicted to be 99.5%. Furthermore, the adsorption under the selected condition implied that the process was well described by pseudo-second order kinetic and Langmuir isotherm, which was an exothermic and spontaneous reaction controlled by physical adsorption. A comparison between CMC@PANI and other biomass adsorbents was carried out in this paper, providing that CMC@PANI was an ideal alternative with high adsorption capacity as well as respectively mild adsorption conditions.
Keywords CMC@PANI Biomimetic Synthesis Adsorption Dye

1绪论..1

1.1染料废水来源与危害.1

1.2染料废水处理方法2

1.3纤维素基吸附材料概述2

1.3.1纤维素.2

1.3.2纤维素基吸附材料..3

1.4导电聚苯胺概述3

1.4.1导电聚苯胺的合成..4

1.4.2聚苯胺复合吸附材料.4

1.5本文研究目的与内容.5

1.5.1研究目的与意义5

1.5.2研究内容6

1.6技术路线图..6

2CMC@PANI复合材料的制备方法优化及表征.8

2.1实验部分.8

2.1.1实验药品8

2.1.2实验仪器8

2.1.3材料制备与优化9

2.1.4静态吸附吸附.9

2.1.5样品表征9

2.2实验结果与讨论.10

2.2.1CMC@PANI制备中的影响因素..10

2.2.2复合材料对不同染料的吸附效果13

2.2.3样品表征.14

3CMC@PANI复合材料吸附MO的影响因素及吸附条件的响应面优化17

3.1实验部分..17

3.1.1实验药品..17

3.1.2实验仪器.17

3.1.3单因素影响实验.17

3.1.4响应面优化吸附条件18

3.2实验结果与讨论.18

3.2.1吸附条件影响..18 纤维素基导电吸附材料的制备及应用表征:http://www.751com.cn/huaxue/lunwen_42858.html