Three dimensional rosette-rod TiO2/Bi2S3 heterojunction for enhanced photoelectrochemical water splitting

Enhancing the separation efficiency of photo-induced carriers in a Bi2S3/BiOCl heterostructure by cooperative influence of oxygen vacancies and the interfacial electric field

“…28 The bands located at 86 and 412 cm −1 were, respectively, from the Bi–S B lg and E g vibration modes. 29,30 Moreover, compared with the pristine BiOCl, the A 1g external Bi–Cl stretching mode band in BiS/BOC-4 was red-shifted (64 cm −1 ), while the A 1g internal Bi–Cl stretching mode (142 cm −1 ) and the E g internal Bi–Cl stretching mode (196 cm −1 ) were all blue-shifted owing to the formation of a chemical bond between Bi 2 S 3 and BiOCl. This result demonstrated that the Bi 2 S 3 /BiOCl heterojunction was successfully prepared.…”

“…28 The bands located at 86 and 412 cm À1 were, respectively, from the Bi-S B lg and E g vibration modes. 29,30 Moreover, compared with the pristine BiOCl, the A 1g external Bi-Cl stretching mode band in BiS/BOC-4 was redshifted (64 cm À1 ), while the A 1g internal Bi-Cl stretching mode (142 cm À1 ) and the E g internal Bi-Cl stretching mode…”

Recent Advances in TiO2‐based Photoanodes for Photoelectrochemical Water Splitting

“…[186][187][188][189][190] For example, Ahmad et al fabricated a 3D double layered rosette-rod TiO 2 (RT) heterojunction with Bi 2 S 3 using two-step hydrothermal method and solvothermal route. [191] The synthesized TiO 2 /Bi 2 S 3 photoanode demonstrates the highest photocurrent density of 3.98 mA/cm 2 at 1.23 V vs. RHE under 100 mW/cm 2 solar light illumination, which is practically 10 times higher than that of pure RT (0.39 mA/cm 2 ) under the same conditions. The enhanced PEC performance can be ascribed to the broad solar light absorption, suitable band gap positions and improved charge carrier separation efficiency of TiO 2 /Bi 2 S 3 photoanodes due to the formation of Type-II heterojunction.…”

Crystal Design and Photoactivity of TiO2 Nanorod Template Decorated with Nanostructured Bi2S3 Visible Light Sensitizer

“…This might be attributed to the following reason. Substantially excessive Bi 2 S 3 deposition leads to an increase in the number of recombination centers, and as a result, a decrease in photocurrent density has been observed due to the loss of photogenerated electrons [ 15 ]. The results herein prove that decoration of Bi 2 S 3 crystals onto the TiO 2 template can effectively improve the photoinduced charge separation efficiency of the TiO 2 template, resulting in more efficient charge migration and higher photocurrent density of the TiO 2 -Bi 2 S 3 composite structure.…”

“…Similarly, Bi 2 S 3 nanowires/TiO 2 nanorod arrays exhibit an excellent photoelectrochemical activity [ 14 ]. Rosette-rod TiO 2 /Bi 2 S 3 shows substantial improvement in photoresponse in compared with pristine TiO 2 photoanode [ 15 ]. Furthermore, hydrothermal method deposition of TiO 2 /Bi 2 S 3 composite film is presented to be promising for applications of photoanode [ 16 ].…”