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RSC Advances · 2019 ·Vol. 9 ·期 46 ·26712-26717 · IF 3.049

Photoelectrochemical detection of ultra-trace fluorine ion using TiO2 nanorod arrays as a probe

Yongzhao Su,Duotian Chen,Siyuan Yang,Shengsen Zhang,Yingju Liu,Yueping Fang,Qiao Zhang,Feng Peng

A photoelectrochemical (PEC) method based on the etching reaction of F ions on the surface of TiO2 nanorod arrays (TNRs) was proposed for the high sensitivity and selectivity detection of F ions. With the increase of F ion concentration, the surface etching reaction on TNR becomes more intense, resulting in the increased number of surface active sites, the reduction of electron transfer resistance, and the increase of photocurrent density. The prepared TNRs as a PEC probe exhibits a good linear relationship between photocurrent increment and the logarithm of F ion concentration in the range from 0.05 to 1000 nM with an ultra-trace detection limit of 0.03 nM for F ion detection.

研究领域: 分析化学 · 环境监测 · 纳米材料 · 电化学传感 · 生物医学工程

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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY · 2014 ·Vol. 39 ·期 9 ·4198-4205 · IF 2.93

Enhanced photoelectrochemical properties of TiO2 nanotube arrays sensitized with energy-band tunable (Cu2Sn)x/3Zn1−xS nanoparticles

Zhenlong Zhang,Jichun Zhu,Shengjun Li,Xiangyang Liu,Yanli Mao

In this paper, TiO 2 nanotube (TNT) arrays and (Cu 2 Sn) x /3 Zn 1− x S ( x = 0.75, 0.24, and 0.09) nanocrystals were prepared, and TiO 2 nanotubes (TNTs) were sensitized with (Cu 2 Sn) x /3 Zn 1− x S nanocrystals. Compared with the plain TNTs, (Cu 2 Sn) x /3 Zn 1− x S sensitized TNTs present an enhanced photoelectrochemical response. The photocurrent enhancement was characterized with the photocurrent ratio of (Cu 2 Sn) x /3 Zn 1− x S sensitized TNTs to plain TNTs, which were 1.50, 1.63, and 2.13 for (Cu 2 Sn) x /3 Zn 1− x S with the composition of x = 0.75, 0.24, and 0.09, respectively. To understand this phenomenon, the energy band alignments of TNTs and (Cu 2 Sn) x /3 Zn 1− x S were investigated, based on which the conduction band offsets (CBO) between TNTs and (Cu 2 Sn) x /3 Zn 1− x S were determined, which were 0.31, 0.47, and 0.63 eV for (Cu 2 Sn) x /3 Zn 1− x S with the composition of x = 0.75, 0.24, and 0.09, respectively. These results display that the photocurrent enhancement becomes large with the increase of CBO, which indicates that the enhanced photoelectrochemical response is mainly due to the energy level matching between TNTs and (Cu 2 Sn) x /3 Zn 1− x S, and the variation of enhancement is resulting from the change of CBO.

研究领域: 材料科学 · 光催化 · 半导体纳米材料 · 能源材料 · 光电化学

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Solar RRL · 2021 ·Vol. 6 ·期 4 ·2100798 · IF 8.582

Controlling the Crystallographic Orientation of Sb2Se3 Film for Efficient Photoelectrochemical Water Splitting

Manjing Wang,Sanlong Wang,Qixing Zhang,Sanjiang Pan,Ying Zhao,Xiaodan Zhang

Finding a cost-effective semiconductor with commercial performance for photoelectrochemical (PEC) water splitting remains challenging. Sb 2 Se 3 , as a low-cost semiconductor, has excellent photo/electric properties for PEC water splitting. Via adjusting the Sb/Se ratio in the precursor ink, the Sb 2 Se 3 with favorable crystallographic orientation can be effectively controlled. The ink with an atomic ratio of Sb/Se = 1:3 induces the growth of a compact Sb 2 Se 3 film with a preferred orientation, resulting in rapid charge transport and high photocurrent. After depositing TiO 2 and Pt in turn, the photocathode with a structure of FTO/Au/Sb 2 Se 3 /TiO 2 /Pt exhibits a photocurrent density of 11.3 mA cm −2 at 0 V RHE . An unassisted solar water splitting device integrating the Sb 2 Se 3 -based photocathode with an inorganic perovskite photovoltaic cell achieves a solar-to-hydrogen efficiency of 2.45%. The efficient Sb 2 Se 3 -based photocathode shows promising potential for solar fuel production.

研究领域: 材料科学 · 物理化学 · 能源化学 · 半导体光电化学 · 可再生能源

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Photoelectrochemical detection of ultra-trace fluorine ion using TiO2 nanorod arrays as a probe

Enhanced photoelectrochemical properties of TiO2 nanotube arrays sensitized with energy-band tunable (Cu2Sn)x/3Zn1−xS nanoparticles

Controlling the Crystallographic Orientation of Sb2Se3 Film for Efficient Photoelectrochemical Water Splitting