Photoelectrochemical Properties of CdS/CdSe Sensitized TiO2 Nanocable Arrays

CdSe nanorods(zinc blende and wulitize) were prepared via hydrothermal method.The CdSe nanorod was formed with a diameter about 100 nm and a length about 300 nm.The photoelectrochemical pro-perties of the CdSe nanorods/P3CT composite film electrode were investigated.The results show that the maximum value of photocurrent appeared at an electrode potential of-0.6 V.The maximum IPCE(13.5%) of the modified film electrode was lower than that of 17.7% CdSe nanorord film electrode.The p-n heterojunction was existed in the CdSe/P3CT composite film electrode.Because of the existence of p-n heterojunction,under certain condition the IPCE of P3CT modified CdSe nanorod was larger than that of CdSe film electrode in the whole long wavelength region(410 nm).

Nanorod

Photocurrent

Composite film

Source

Cite

Citations (0)

Abnormal Cathodic Photocurrent Generated on an n‐Type FeOOH Nanorod‐Array Photoelectrode

Chemistry - A European Journal (2016)

Hongjun Chen Miaoqiang Lyu Gang Liu Lianzhou Wang

A simple, wet-chemical method for the synthesis of an FeOOH nanorod-array photoelectrode on fluorine-doped tin oxide (FTO) glass is reported. Nanorods of diameter about 35 nm and length about 300 nm have been vertically grown on an FTO substrate. Upon calcination, the FeOOH phase could be easily converted to a hematite structure while maintaining the shape of the nanorod array. An interesting abnormal cathodic photocurrent is generated on the FeOOH nanorod-array photoelectrode under illumination, which is totally different from that obtained on a calcined hematite photoelectrode under the same experimental conditions. The cathodic photocurrent density generated on the FeOOH photoelectrode can also be tuned by applying an electrochemical anodic or cathodic treatment. Detailed analysis has revealed that higher valence state Fe(IV) species in the FeOOH photoelectrode play an important role in sacrificing the photoexcited electrons for generation of the cathodic photocurrent. Comparison between the FeOOH and hematite photoelectrodes allows for a better understanding of the interplay between crystal structure, surface reactions, and photocurrent. The findings on this new abnormal phenomenon could also provide guidance for the design of new types of semiconducting photoelectrochemical devices.

Photocurrent

Nanorod

Tin oxide

Photoelectrochemistry

10.1002/chem.201504512

Cite

Citations (8)

개선된 화학 용액 공정법을 이용하여 성장시킨 산화구리(2)의 광전기화학 특성 연구

대한금속재료학회지 (2016)

하진욱 류혁현 이원재

In this study, cupric oxide (CuO) nanorods were grown on the fluorine-doped tin oxide (FTO) glass substrate using a modified-chemical bath deposition (M-CBD) method. We investigated the morphology, structural, optical and photoelectrochemical properties of the cupric oxide nanorods with various growth durations by using field-emission scanning-electron microscopy (FE-SEM), X-ray diffraction (XRD), UV-visible spectroscopy (UV-vis) and three-electrode potentiostat, respectively. In this work, we found that the morphologies, thickness, growth rate, crystallinities, grain sizes and optical bandgap were controllable on the growth duration, which affected photocurrent density and photo-stability. The highest growth rate of CuO nanorods was 126 nm/min. From the XRD measurement, we also confirmed that (020) directional growth affected the growth of the CuO nanorods. A maximum photocurrent density of-1.88 mA/cm² at -0.55 V (vs. SCE) and high photo-stability value about 40 % was obtained with 10 minutes growth duration. (Received November 5, 2015)

Nanorod

Photocurrent

Tin oxide

Chemical bath deposition

Potentiostat

Source

Cite

Citations (0)

Electrosprayed MnO2 on ZnO nanorods with atomic layer deposited TiO2 layer for photoelectrocatalytic water splitting

Applied Catalysis B Environment and Energy (2020)

Min-Woo Kim Bhavana Joshi Edmund Samuel Hyunjun Seok Ali Aldalbahi

Nanorod