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第 35 卷第 9 期 精 细 化 工 Vol.35, No.9
201 8 年 9 月 FINE CHEMICALS Sept. 2018

功能材料
镍负载 TiO /聚乙烯亚胺/石墨烯纳米复合
2

催化剂的制备及性能

苏 策，张红博，常开善，李思良，李冠斌

（兰州理工大学 石油化工学院， 甘肃 兰州 730050）

摘要：首先采用改进的 Hummers 法制备了氧化石墨烯（GO），再以聚乙烯亚胺（PEI）修饰的氧化石墨烯为载
体，并以硫酸钛和氯化镍为前驱体，利用水热法在 180 ℃下以 PEI 为交联剂制得镍负载的 TiO 2 /PEI/石墨烯纳米
复合催化剂（Ni-TiO 2 /PEI/RGO）。通过紫外-可见分光光度计（UV-vis）、傅里叶变换红外光谱（FTIR）、扫
描电镜（SEM）、透射电镜（TEM）、X 射线衍射（XRD）等测试手段对催化剂进行了表征。结果表明，
Ni-TiO 2 /PEI/RGO 纳米复合催化剂中镍负载 TiO 2 纳米粒子与石墨烯能够均匀复合，并具有较小的晶粒尺寸，孔
2
径分布主要在 4～30 nm，比表面积为 241.77 m /g，镍的负载量为 2.35%（质量分数），二氧化钛的负载量为 17.46%
（质量分数）。考察了该催化剂在 NaBH 4 存在下对对硝基苯酚（4-NP）还原生成对氨基苯酚（4-AP）的催化活
性。结果表明，使用 Ni-TiO 2 /PEI/RGO 催化剂 4-NP 降解率为 98%，且催化剂重复使用 9 次后，4-NP 降解率仍
能保持 90%以上。
关键词：石墨烯；PEI；镍负载的二氧化钛；水热法；4-NP；功能材料
中图分类号：O643 文献标识码：A 文章编号：1003-5214 (2018) 09-1496-08

Preparation and Properties of Nickel-loaded Titanium Dioxide/

Poly(ethylenimine)/Graphene Nanocomposite Catalyst

SU Ce, ZHANG Hong-bo, CHANG Kai-shan, LI Si-liang, LI Guan-bin
（College of Petro-Chemical Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu,China）

Abstract: Graphene oxide (GO) was first prepared by an improved Hummers method and then modified
with poly(ethylenimine) (PEI). Finally, nickel-loaded titanium dioxide/PEI/RGO nanocomposite (Ni-TiO 2/
PEI/RGO) was synthesized via a hydrothermal method at 180 ℃ using PEI modified GO as carrier,
titanous sulfate and nickel chloride as precursor, PEI as linker. The prepared materials were characterized
by UV-vis absorption spectrum (UV-vis), Fourier transformed infrared spectroscopy (FTIR), scanning
electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction (XRD). The
results showed that uniformly dispersed Ni-loaded TiO 2 nanoparticles were successfully loaded on the
surface of graphene sheets and had smaller particle size. The particle distribution was mainly in the range
2
from 4 to 30 nm, the specific surface area was 241.77 m /g, the nickel loading (mass fraction, the same
below) was 2.35%, and that of TiO 2 was 17.46%. The catalytic reduction of 4-nitrophenol (4-NP) to
4-aminophenol (4-AP) was investigated in the presence of Ni-loaded TiO 2/PEI/RGO nanocomposite and
NaBH 4. The results indicated that Ni-TiO 2/PEI/RGO catalyst exhibited superior catalytic activity, the
degradation efficiency of 4-NP was 98 % and still could remain over 90% even after recycling nine times.
Key words: graphene; PEI; nickel-load titanium dioxide; hydrothermal method; 4-NP; functional materials
Foundation item: National Natural Science Foundation of China (21462025)

[l]
芳香族硝基化合物（NAC）是重要的有机中间 药及石油化工等领域 。随着化学工业的发展，NAC
体和化工原料，广泛应用于塑料、医药、染料、农 的应用需求明显上升。工业生产中排放的硝化废水

收稿日期：2017-06-22; 定用日期：2017-11-23; DOI: 10.13550/j.jxhg.20170509
基金项目：国家自然科学基金（21462025）
作者简介：苏 策（1972—），男，副教授，博士，电话：13038738807，E-mail：cesu2003@163.com。