Photoelectrochemical applications of electrochemical deposition of Ni2+-doped FeS2 thin films

Abstract

Different concentration (1-5 mol%) of Ni2+doped FeS2 thin films were deposited by facile ECD technique. XRD pattern Ni2+ ion-doped FeS2 thin films were cubic structure with the high intensity plane (2 0 0). HRSEM images show that the undoped with 1-2 mol% Ni2+ doped FeS2 thin films were spherical-like morphology with aggregated grains. 3 mol% Ni2+ doped FeS2 thin film was aggregated with smaller size grains. Electrochemical impedance analysis reveals that the minimum charge transfer resistance (69 Ω) is obtained for 3 mol% Ni2+ ion-doped FeS2 thin films with exceptional conductivity character compared to other samples. Photoelectrochemical test indicates that 3 mol% Ni2+ ion-doped FeS2 thin film generates enhanced photocurrent response and faster immigration of photoinduced charge carriers compared to the other samples. It has been observed from CV analysis; the optimized 3 mol% Ni2+ doped FeS2 thin film delivers superior electrocatalytic performance of triiodide reduction.

2D/3D-Shaped Fe0.8Ni0.2S2/ZIF-67 as a Nanozyme for Rapid Measurement of H2O2 and Ascorbic Acid with a Low Limit of Detection

“…The Raman spectra of the samples are shown in Figure . The characteristic peaks of sulfide at 300–500 cm –1 were detected for the vibration mode of a sulfur atom ( E g 332 cm –1 ) and the stretching mode of S–S ( A g 375 cm –1 ). , The carbon resonance of the G-band was detected at ∼1450 cm –1 …”

“…The characteristic peaks of sulfide at 300−500 cm −1 were detected for the vibration mode of a sulfur atom (E g 332 cm −1 ) and the stretching mode of S−S (A g 375 cm −1 ). 40,41 The The composition of the composite was further characterized by XPS. Figure 5A is a full spectrum, indicating Fe, S, Co, Ni, and C elements in the sample.…”