Non-stoichiometric Cu_xIn_1−xS quantum dots for robust photodegradation of gemifloxacin: influencing parameters, intermediates, and insights into the mechanism

Abstract

Promising 0D non-stoichiometric CuxIn1−xS quantum dots show robust photodegradation towards gemifloxacin under visible light.

Synthesis of Z-schemes 0D–3D heterojunction bi-functional photocatalyst with ZnInCuS alloyed QDs supported BiOI MF for H2O2 production and N2 fixation

“…6d presents the Mott-Schottky (MS) plots of ZCIS and BOI, which depict their CB potentials to be −0.90 and 0.53 V respectively vs. NHE by following our reported papers. 17,46 Consequently, the VB potentials of ZCIS and BOI were calculated to be 0.83 V and 2.31 V, respectively, using eqn (1):…”

“…6d presents the Mott–Schottky (MS) plots of ZCIS and BOI, which depict their CB potentials to be −0.90 and 0.53 V respectively vs. NHE by following our reported papers. 17,46 Consequently, the VB potentials of ZCIS and BOI were calculated to be 0.83 V and 2.31 V, respectively, using eqn (1): E g = VB − CBSteady-state photoluminescence (PL) and time-resolved photoluminescence (TRPL) spectroscopy were used to explore the separation and migration efficiency of the photoinduced electron–hole pairs, along with their lifetime. 47,48 Under light illumination, BOI shows an intense PL emission peak at about 490 nm (Fig.…”

“…6h), the lifespan of the injected electrons for ZCIS–BOI(1 : 1) is calculated to be 130 μs, which is superior to those for ZCIS–BOI(2 : 1) (96 μs), ZCIS–BOI(1 : 2) (82 μs), and ZCIS (72 μs), by following our previous reports, verifying the remarkable increase in the catalytic competence of the ZCIS–BOI(1 : 1) heterojunction. 17,46 The exciton separation and transfer efficiency can also be established from the electrochemical impedance spectroscopy (EIS) data, which are shown in Fig. 6i.…”

Defect Control via Compositional Engineering of Zn-Cu-In-S Alloyed QDs for Photocatalytic H2O2 Generation and Micropollutant Degradation: Affecting Parameters, Kinetics, and Insightful Mechanism

“…Here, the PZC value for the ZCIS-2 photocatalyst was calculated to be 5.6, and the pH study gives the optimum activity at pH = 6, where the catalytic surface is negatively charged and CIP appears to be positively charged (pH of CIP is less than its pKa value of 8.25). Therefore, both the catalyst (adsorbent) and CIP pollutant (adsorbate) get robustly attached, leading to better photocatalytic degradation via the reactive oxygen species …”

“…Therefore, both the catalyst (adsorbent) and CIP pollutant (adsorbate) get robustly attached, leading to better photocatalytic degradation via the reactive oxygen species. 65 Influence of Anion on Degradation. Additionally, the influence of various anions present in the aqueous water system on photocatalytic degradation of the target pollutant CIP antibiotic was also studied to know its effect on the degradation process.…”