In situ Ba2+ exchange in amorphous TiO2 hollow sphere for derived photoelectrochemical sensing of sulfur dioxide
In situ Ba2+ exchange in amorphous TiO2 hollow sphere for derived photoelectrochemical sensing of sulfur dioxide
复制标题
无定形 TiO2 空心球中的原位 Ba2 交换用于二氧化硫的光电化学传感
DOI：
10.1016/j.snb.2018.01.199
复制
发表时间：
2018-06
期刊：
影响因子：
--
通讯作者：
Li Hongbo
中科院分区：
文献类型：
--
作者：
Li Jing;Xie Wenyu;Shao Rong;Ju Xionghua;Li Hongbo
由于SO2在全球范围内造成严重的环境安全和人类疾病，因此开发低成本、高灵敏度的SO2传感器是一项紧迫的任务。基于Ba 2+掺杂非晶TiO 2空心球构建了第一个SO2光电化学传感平台。采用SiO2模板法，先进行原位Ba 2+离子交换和掺杂，成功地制备了Ba 2 +/SiO2纳米复合材料。测定前，SO2被过氧化氢氧化生成H2SO 4，H2SO 4被NaOH进一步中和，生成Na 2SO 4。与Ba 2+掺杂的TiO 2空心球反应，生成BaSO 4纳米粒子，导致光生电子通道关闭，光电流显著降低。所制备的PEC传感器在1至4000 pmol L-1的范围内与SO 42-的浓度呈线性关系，检测限为0.4 pmol L-1。该传感器成功地应用于工业废气中SO2的监测。该传感器具有动态线性范围宽、选择性高、灵敏度高、稳定性好、成本低等特点。这一战略为其他类似的空气污染物铺平了新的道路。
The development of cost-effective and highly sensitive SO2sensors is an urgent task since SO2causes worldwide serious environmental security and human diseases. Herein, a first photoelectrochemical (PEC) sensing platform for SO2was constructed based on Ba2+doped amorphous TiO2hollow spheres. They were successfully prepared by SiO2template method before in situ Ba2+ions exchanging and doping. Before assay, SO2was oxidized by hydrogen peroxide and generated H2SO4, which was further neutralized by NaOH resulting in the generation of Na2SO4. When it reacted with Ba2+-doped TiO2hollow spheres, the produced BaSO4nanoparticles leaded to the photocurrent remarkably decreased due to the photo-induced electron pathways shut down. The fabricated PEC sensor was linear with the concentration of SO42−in the range from 1 to 4000 pmol L−1with a detection limit of 0.4 pmol L−1. The other conventional species did not interfere in the detection of SO42−in aqueous system and the fabricated PEC sensor was successfully applied in monitoring of SO2in industry waste gas. It demonstrated good performance including wide dynamic linear range, high selectivity, ultrasensitivity, excellent stability and low cost. This strategy paves a new way for other similar air pollutants.
登录
查看更多内容
影响因子：
--
作者：
Zhang X;Gui Y;Dong X
通讯作者：
Dong X
影响因子：
6.2
作者：
Hongbo Li;Jing Li;Qin Xu;Zhanjun Yang;Xiaoya Hu
通讯作者：
Hongbo Li;Jing Li;Qin Xu;Zhanjun Yang;Xiaoya Hu
一锅法合成具有增强光电化学性能的 BiPO4 功能化还原氧化石墨烯，用于毒死蜱的选择性和灵敏检测
影响因子：
11.9
作者：
Jing Qian;Zhenting Yang;Chengquan Wang;Kan Wang;Qian Liu;Ding Jiang;Yuting Yan;Kun Wang
通讯作者：
Kun Wang
影响因子：
8.4
作者：
Kumar, Ramesh;Avasthi, D. K.;Kaur, Amarjeet
通讯作者：
Kaur, Amarjeet
影响因子：
8.4
作者：
A. Volkov;E. Gorbova;A. I. Vylkov;D. Medvedev;A. Demin;P. Tsiakaras
通讯作者：
A. Volkov;E. Gorbova;A. I. Vylkov;D. Medvedev;A. Demin;P. Tsiakaras