[1]周 琦,朱晓春,周志成,等.基于TiO2纳米颗粒负载Cd2+的光电化学法检测硫化物[J].南京师大学报(自然科学版),2021,44(03):38-44.[doi:10.3969/j.issn.1001-4616.2021.03.007]
　Zhou Qi,Zhu Xiaochun,Zhou Zhicheng,et al.Photoelectrochemical Detection of Sulfide Based on TiO2Nanoparticles Loaded with Cd2+[J].Journal of Nanjing Normal University(Natural Science Edition),2021,44(03):38-44.[doi:10.3969/j.issn.1001-4616.2021.03.007]
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基于TiO2纳米颗粒负载Cd2+的光电化学法检测硫化物()
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《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

卷:
第44卷
期数:
2021年03期
页码:
38-44
栏目:
·化学·
出版日期:
2021-09-15

文章信息/Info

Title:
Photoelectrochemical Detection of Sulfide Based on TiO2Nanoparticles Loaded with Cd2+
文章编号:
1001-4616(2021)03-0038-07
作者:
周 琦1; 朱晓春2; 周志成1; 梁 伟1; 朱梦周1; 顾子扬2; 王 欣2; 王玉萍3
(1.国网江苏省电力公司电力科学研究院,江苏 南京 211100)(2.南京工程学院自动化学院,江苏 南京 211167)(3.南京师范大学化学与材料科学学院,江苏 南京 210023)
Author(s):
Zhou Qi1; Zhu Xiaochun2; Zhou Zhicheng1; Liang Wei1; Zhu Mengzhou1; Gu Ziyang2; Wang Xin2; Wang Yuping3
(1.Jiangsu Electric Power Company Research Institute,Nanjing 211100,China)(2.School of Automation,Nanjing Institute of Engineering,Nanjing 211167,China)(3.School of Chemistry and Materials Science,Nanjing Normal University,Nanjing 210023,China)
关键词:
硫化物; 二氧化钛; Cd2+负载; 光电化学法
Keywords:
sulfide; titanium dioxide; Cd2+ doping; photoelectrochemical method
分类号:
X832,O659.2
DOI:
10.3969/j.issn.1001-4616.2021.03.007
文献标志码:
A
摘要:
本文基于Cd2+与硫离子的相互作用,采用Cd2+负载纳米二氧化钛(TiO2)颗粒的复合电极,建立了一种简易快速检测微量硫化物的光电化学测量方法. 通过扫描和透射电子显微镜、X 射线单晶衍射仪、紫外/可见/分光光度计等对所制备的材料和电极进行了表征. 结果表明:CdS作为敏化剂,拓宽了纳米TiO2光吸收范围,有效地促进光生电子与空穴的分离,使电极的光电信号显著增强. 在350 W氙灯照射下,利用电流-时间法,光电流响应值与硫化物的浓度在0.001 μmol/L～1 000 μmol/L范围内呈线性关系,检测限为0.32 nmol/L(S/N=3). 该方法灵敏度高、稳定性及重现性良好,为实现硫化氢气体的快速测定和测试仪器小型化打下基础.
Abstract:
Based on the interaction between Cd2+ and sulfur ion,the simple and rapid detection photoelectrochemical method for trace sulfide was studied by using Cd2+ doped nano titanium dioxide(TiO2)particles composite electrode. The prepared PEC electrodes were characterized by scanning electron and transmission electron microscopy,X-ray single crystal diffractometer,UV-vis spectrophotometer,etc. The results showed that CdS,as a sensitizer,widened the photoabsorption range of nano TiO2,effectively promoted the separation of photogenerated electron holes,and significantly enhanced the photoelectric signal of the electrode. Using current-time method,the photocurrent response value showed a linear relationship with the sulfide concentration within the range of 0.001 μmol/L to 1 000 μmol/L,and the detection limit was 0.32 nmol/L(S/N=3)under 350 W xenon lamp irradiation. The method has high sensitivity,good stability and reproducibility,which lays a foundation for the rapid determination of hydrogen sulfide gas and the miniaturization of test instrument.

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备注/Memo

备注/Memo:
收稿日期:2020-02-21.
基金项目:国家自然科学基金项目(51578295).
通讯作者:朱晓春,教授,研究方向:自动化检测技术的研究. E-mail:zhuxc@njit.edu.cn
更新日期/Last Update: 2021-09-15