Page 128 - 《精细化工》2021年第1期

第 38 卷第 1 期 精 细 化 工 Vol.38, No.1
202 1 年 1 月 FINE CHEMICALS Jan. 2021

催化与分离提纯技术
基于蛋壳膜基碳点合成 Ag/E-CDs/Fe O 4
3

及其催化还原性能

*
张大琴，李超勇，贾志刚 ，罗光程，武 林，许立信
（安徽工业大学 化学与化工学院，安徽 马鞍山 243032）

摘要：采用 FeCl 3 •6H 2 O、尿素、硝酸银为原料，以碳量子点为还原剂，通过水热和光催化两步法合成了
Ag/E-CDs/Fe 3 O 4 复合物（ECIA）。利用鸡蛋壳膜制备了碳量子点表面活性基团，先合成了 E-CDs/Fe 3 O 4 ，然后在
光照条件下，Ag 粒子进一步沉积于 E-CDs/Fe 3 O 4 表面。采用 XRD、FTIR、SEM、TEM 和荧光光谱（PL）等对
产物进行表征。以水体中的对硝基苯酚（4-NP）为模拟污染物，研究了 ECIA 的催化还原性能。探讨了复合物
中含 Ag 量、催化剂用量、4-NP 初始浓度对催化还原反应的影响。结果表明，E-CDs/Fe 3 O 4 与 Ag 粒子复合后提
高了催化剂的催化活性，但复合物含 Ag 量过高会降低催化剂催化活性，其中，硝酸银添加量为 2 mg 时所得样
–1
品 ECIA-2 催化活性最佳，对 4-NP 的催化还原反应符合一级动力学方程，室温下该反应的 k i 为 0.6441 min 。
关键词：蛋壳膜；碳点；催化还原；对硝基苯酚；催化技术
中图分类号：O643.36; TQ630 文献标识码：A 文章编号：1003-5214 (2021) 01-0118-06

Synthesis of Ag/E-CDs/Fe 3O 4 based on carbon dot derived from eggshell
membrane and its performance of catalytic reduction

*
ZHANG Daqin, LI Chaoyong, JIA Zhigang , LUO Guangcheng, WU Lin, XU Lixin
（School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan 243032, Anhui, China）

Abstract: Ag/E-CDs/Fe 3O 4 composites (ECIA) were synthesized by hydrothermal and photocatalytic
two-step process using FeCl 3•6H 2O, urea and AgNO 3 as raw materials and carbon quantum dots as reducing
agent. E-CDs/Fe 3O 4 was first prepared by using the surface rich functional groups of carbon quantum dots
(CDs) derived from eggshell membrane (E-CDs). Then, silver particles were further deposited onto the
surface of E-CDs/Fe 3O 4 under the light illumination. The products were characterized by XRD, FTIR, SEM,
TEM and photoluminescence (PL). The catalytic reduction properties of the as-synthesized
Ag/E-CDs/Fe 3O 4 composites (ECIA) were investigated using 4-nitrophenol (4-NP) as a probe pollutant in
water. The effects of silver content, catalytic dosage and initial concentration of 4-NP on the reduction of
4-NP were investigated. The results showed that the cooperation of E-CDs/Fe 3O 4 and silver particles
enhanced the catalytic activity of the catalyst, while the excessive content of silver content in the composite
led to the decrease of catalytic activity of the catalyst. Especially, the catalytic activity of ECIA-2 sample
prepared using 2 mg of AgNO 3 was the best. The reduction and degradation of 4-NP was in accordance with
–1
the first-order kinetic reaction, and k i was 0.6441 min .
Key words: eggshell membrane; carbon dots; catalytic reduction; 4-nitrophenol; catalysis technology

对硝基苯酚（4-NP）是农药、医药、染料等行 降解速率慢等特点 [2-3] 。从相关行业排放的 4-NP 废
[1]
业终端产品的重要原料和中间体 ，同时作为一种 水是常见的有机污染废水，对生态环境破坏力强，
典型的酚类污染物，4-NP 具有累积性强、毒性大及 人体健康危害大，容易引起人体心、肺等脏器中毒、

收稿日期：2020-06-18; 定用日期：2020-08-11; DOI: 10.13550/j.jxhg.20200530
基金项目：国家自然科学基金（20907001）；安徽省大学生创新创业训练计划项目（201810360208，201710360200）
作者简介：张大琴（1997—），女，硕士生，E-mail：871789835@qq.com。联系人：贾志刚（1977—），男，教授，E-mail：zjchemyue@126.com。