3D Hierarchical Bi2S3 Nanostructures by Polyvinylpyrrolidone (PVP) and Chloride Ion-Assisted Synthesis and Their Photodetecting Properties

Abstract

A solvothermal method has been employed to synthesize bismuth sulfide (Bi 2 S 3 ) with three-dimensional (3D) hierarchical architectures. The influences of different types of surfactants and Cl − species on the size and morphology were investigated. A possible formation mechanism was also proposed on the basis of time-dependent experiments. The photoresponse properties show that the conductivity of Bi 2 S 3 micro-flowers is significantly enhanced and the photocurrent is approximately two orders of magnitude larger than the dark current. The response and decay times are estimated to be 142 and 151 ms, respectively. It is expected that hierarchical architectures Bi 2 S 3 may provide a new pathway to develop advanced nanomaterial for high-speed and high-sensitivity photoelectrical switches and photodetecting devices.

Taking bismuthinite to bismuth sulfide nanorods in two easy steps

“…4,5 Recent research has focused on the synthesis and applications of one-dimensional Bi 2 S 3 nanomaterials due to reported enhancement of thermal, electric and optoelectronic properties. 4,6,7 A variety of nanostructures have been investigated for use in nanoscale devices, 8,9 CT imaging, 10,11 high energy dosimetry (i.e. : radiation detection), 12 gas sensing 7,13,14 and hydrogen storage.…”

Photomultiplicative and High External Quantum Efficient Energy Conversion Device for Paper Electronics

“…Oxygen or nitrogen atoms of the pyrrolidone units of PVP are chemically engaged with the freshly generated nuclei for stabilizing the nuclei. The chelation between the oxygen or nitrogen of pyrrolidone from PVP molecules and Bi 3+ , resulting in the selective absorption and development of distinct crystallographic planes of Bi 2 S 3 , may be one of the reasons why PVP will be favorable for the creation of NRs, and the possible reaction is shown in relation . Further, this solution was put in a fume hood for 48 h to complete the chemical reactions.…”

“…The chelation between the oxygen or nitrogen of pyrrolidone from PVP molecules and Bi 3+ , resulting in the selective absorption and development of distinct crystallographic planes of Bi 2 S 3 , may be one of the reasons why PVP will be favorable for the creation of NRs, and the possible reaction is shown in relation 1e. 37 Further, this solution was put in a fume hood for 48 h to complete the chemical reactions. This solution was centrifuged several times for purification with distilled water, followed by purification with ethanol.…”

Facile SILAR Processed Bi2S3:PbS Solid Solution on MWCNTs for High‐performance Electrochemical Supercapacitor

“…and Ding el al . synthesized Bi 2 S 3 flowerlike nanorods and 3D hierarchical nanostructure using solvothermal technique . One‐step hydrothermal route was adopted by Li et al .…”