Electron beam deposited (Cu₂S‐CdS)GOthin film as active electrode for supercapacitor and enhanced photocatalyst for water remediation

Abstract

Summary Metal sulfides conjugated graphene oxide (GO) have captivated researchers owing to the elaborated opto‐electrochemical and photocatalytic properties. Current research reports the synthesis of Copper sulfide (CuS) and cadmium sulfide (CdS) bimetal sulfide GO composite by single‐source precursor using diethyl dithiocarbamate ligand. The synthesized alloy was deposited through electron beam deposition system. Characterization of the thin films was done by various techniques including, XRD, UV‐visible spectrophotometry, fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM)‐energy dispersive X‐ray analysis (EDX). Electrochemical properties were investigated through cyclic voltammetry and linear sweep voltammetry using 3‐M KOH. Degradation of toxicants such as methyl red dye, pesticide isopyrazam, and phenol was done by the thin film to evaluate its photocatalytic characteristic. (CuS‐CdS)GO thin film showed separate bandgaps for CuS and CdS as 2.04 and 3.3 eV. A hexagonal crystal system for (Cu2S‐CdS)GO was observed through XRD with an average crystal size of 50 nm. A cubic shape with globular edges was detected by SEM investigation. An impressive specific capacitance value of 35 F g−1 at 100 mV s−1 proved it as a promising electrode for supercapacitors. A remarkable photocatalytic degradation rate was obtained by the thin film for all the toxicants with the highest rate for pesticide, that is, 81% under just 60 minutes, which remained >70% even after four successive cycles. The profound electrochemical and photocatalytic properties of (Cu2S‐CdS)GO thin film make it an auspicious material for optical, electrical, and photo‐devices.

Energy storehouse and a remarkable photocatalyst: Al2S3/Cu2S/Ni17S18 thin film as supercapacitor electrode and pollutants degradation

“…In current experiment a slightly increased value was observed as compared with previous studies. In the previous published research, the obtained band gap energy was 1.8 eV for CuS, which was a composite with CdS and graphene oxide [3]. Another composite with CuS and AlS 2 displayed the band energy to be 3.49 eV [39].…”

“…Such characteristics of nanomaterials, differing them from their bulk counterparts, result in great exploitation in imperative and novel applications. Metal chalcogenides are known for their diverse structural ranges in various applications [3][4][5]. They possess exciting electromagnetic properties [6,7].…”

Synthesis of In : SnO2/La4NiS7 via Diethyldithiocarbamate‐Assisted Spin Coating: A Promising Route for High‐Performance Transparent Photoelectrochemical Energy Storage and Generation

“…In order to create a suspension, ethyl alcohol was blended evenly with both metal salts [36] . It was swirled until the mixture had completely dissolved.…”

“…In order to create a suspension, ethyl alcohol was blended evenly with both metal salts. [36] It was swirled until the mixture had completely dissolved. The generated ligand solution was gradually blended with the metal salts assortment.…”

In:SnO2/Yb2S3:Cu2S:ZnS: A Rare Earth Metal Sulfide‐Conjugated Transition Metal Sulfide Photoactive Electrode

“…The diethyl dithiocarbamate ligand was produced in a two-neck flask containing a KOH (base) suspension in ethanol. [41,42] Diethyl amine was added to the solution after 20 vigorous min of stirring, during which the mixture was constantly swirled. After that, carbon disulfide was added, and a cold bath was used to immerse the apparatus.…”