Fabrication and photoelectrochemical properties of TiO₂/CuInS₂/Bi₂S₃ core/shell/shell nanorods electrodes

Abstract

The FESEM images (a and b), photocurrent density versus potential (c–v) curves (c) and schematic of the energy level arrangement (d).

Enhanced Visible-Light Photoelectrochemical Conversion on TiO2 Nanotubes with Bi2S3 Quantum Dots Obtained by in Situ Electrochemical Method

“…Figure b shows the photoconversion efficiency (η) for the Ti_Bi_0, Ti_Bi_15, and Ti_Bi_30 samples. It can be observed that the η values for all the sensitized samples are higher than the pristine TiO 2 NTs (η = 0.11%) . The Ti_Bi_0 sample presented η = 0.27%, and after the heat treatment, the photoconversion efficiency of the Ti_Bi_15 sample (η = 0.44%) increased 4 times.…”

“…In addition, all sensitized samples reached the photocurrent saturation at a more negative potential. The increase of the PEC’s overall efficiency probably occurs due to the reduction of the external applied bias. , The Ti_Bi_15 photoanode obtained a higher saturated photocurrent (0.3 mA·cm –2 ) than that of other samples. It confirms that the Bi 2 S 3 nanoparticles coating of the TiO 2 NTs surface by the in situ electrochemical method is a simple but effective way to enhance the PEC performance of TiO 2 photoanodes.…”

“…It can be observed that the η values for all the sensitized samples are higher than the pristine TiO 2 NTs (η = 0.11%). 50 The Ti_Bi_0 sample presented η = 0.27%, and after the heat treatment, the photoconversion efficiency of the Ti_Bi_15 sample (η = 0.44%) increased 4 times. Finally, the Ti_Bi_30 sample showed a photoconversion efficiency η = 0.27%, decreasing to the same value observed for the initial Ti_Bi_0 sample.…”

A new-type inorganic [KNbO3]0.9[BaCo1/2Nb1/2O3-δ]0.1perovskite oxide as sensitizer for photovoltaic cell

“…(a) and (b). The photoconversion efficiency η of the light energy to chemical energy in the presence of an external applied potential E app can be calculated from the equation as follows : where j p is photocurrent density (mA cm −2 ), is total power output, is electrical power input, and I 0 is the power density of incident light (mW cm −2 ). is the standard state‐reversible potential (which is 1.23 V (vs. NHE)), and the applied potential is , where E meas is the electrode potential (vs. SCE) of the working electrode at which photocurrent was measured under illumination and E aoc is the electrode potential (vs. SCE) of the same working electrode under open circuit conditions, in the same electrolyte and under the same illumination.…”

TiO2 nanotube arrays decorated with Au and Bi2S3 nanoparticles for efficient Fe3+ ions detection and dye photocatalytic degradation

“…A series of modification strategies have been carried out to overcome these disadvantages, such as anatase TiO2 NTAs doped with metal, non-metal or semiconductor. Narrow bandgap semiconductors in particular bismuth-based semiconductors have been used to make TiO2 NTAs susceptible to visible, maintain excellent charge transfer and photofluorescence properties [20] . So Bi2S3 have attracted considerable attention.…”