第 46 卷第 5 期 Vol. 46 No. 5 2016 年 10 月 Oct 2016

所属栏目：功能材料 镍掺杂多孔石墨烯的制备、表征及对过氧化氢的电化学检测

张文慧，王素敏*，王奇观，邱申保，赵绒娜，尚嘉茵 （西安工业大学 材料与化工学院，陕西 西安 710032）

摘　要：以氧化石墨烯为原料，采用氢氧化钾氧化法制备了多孔石墨烯（PrGO）和镍掺杂多孔石墨烯（Ni-PrGO）。惰性气氛下通过高温烧结将PrGO和Ni-PrGO中的氧化态碳进行还原，同时经过氢氧化钾氧化，在PrGO和Ni-PrGO的石墨烯片层中形成孔径为45~100 nm的孔洞。XRD谱图表明，在Ni-PrGO中镍以β-Ni（OH）2纳米颗粒形式存在。分别以还原氧化石墨烯（rGO）／氧化铟锡（ITO）、PrGO／ITO和Ni-PrGO／ITO为工作电极，采用时间-电流曲线法检测水溶液中的H2O2，3种工作电极对双氧水的响应性强弱顺序为：Ni-PrGO／ITO＞PrGO／ITO＞rGO／ITO；在2×10-5 mol／L到2×10-4 mol／L范围内，Ni-PrGO／ITO可以有效测定水溶液中H2O2的浓度。研究结果表明，多孔结构有效地提高了PrGO的电化学催化性能，镍掺杂可进一步提高Ni-PrGO的电化学催化性能。

关键词：多孔石墨烯；镍掺杂；双氧水检测；电化学

中图分类号：TQ127　　文献标识码：A　　文章编号：1009-9212（2016）05-0033-05

Preparation and Characterization of Nickel Doped Porous Graphene and Electrochemical Detection Toward H2O2

ZHANG Wen-hui, WANG Su-min*, WANG Qi-guan, QIU Shen-bao, ZHAO Rong-na, SHANG Jia-yin (School of Materials and Chemical Engineering, Xi’an Technological University，Xi’an 710032, China)

Abstract：Selecting the exfoliated graphene oxide(GO) as the starting materials, porous graphene(PrGO) and nickel doped porous graphene (Ni-PrGO) were prepared by chemical oxidation using KOH and air. It was showed that by thermal sintering in inert atmosphere the carbon in oxidation state in PrGO and Ni-PrGO was reduced, and pores with diameter of 45~100 nm were produced on the surface of PrGO and Ni-PrGO. In addition, the XRD spectra illustrated that the dopant nickel was presented as β-Ni(OH)2 nanoparticles in Ni-PrGO. The modified electrodes of thermal reduced graphene (rGO)/indium tin oxide (ITO), PrGO/ITO and Ni-PrGO were employed respectively as working electrodes to determine the H2O2 in water by time-current curve method. The response magnitude of H2O2 on the three functionalized electrodes was in the order of Ni-PrGO/ITO＞PrGO/ITO＞rGO/ITO. In the range from 2×10-5 mol/L to 2×10-4 mol/L, the concentration of H2O2 could be ascertained by Ni-PrGO/ITO electrode effectively. The results showed that the electrochemical performance of PrGO was improved because of pores presented on its surface. Moreover, electrochemical performance of the Ni-PrGO was further enhanced because of being doped by nickel.

Key words：porous graphene; nickel doping; hydrogen peroxide determination; electrochemistry

基金项目：国家自然科学基金（21103133），陕西省自然科学基金（2015JM5224），大学生创新创业训练计划（201510702030）。

作者简介：张文慧（1993-），女，云南玉溪人，研究方向：纳米碳导电高分子材料（E-mail：zhangwenhuiyn 1993@163.com）。

联 系 人：王素敏，副教授，研究方向：纳米碳材料（E-mail：suminwang@163.com）。

收稿日期： 2016-06-0