Green photocatalyst Cu/NiO doped zirconia for the removal of environmental pollutants

Areeb, Aneeqa; Yousaf, Tayyaba; Murtaza, Maida; Zahra, Manzar; Zafar, Mazhar Iqbal; Waseem, Amir

doi:10.1016/j.mtcomm.2021.102678

Cited by 18 publications

(7 citation statements)

References 70 publications

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“…If RhB is ingested, it might cause irritation of the abdominal disorders, blindness, respiratory distress and skin sensitization. ( Markandeya et al, 2017 ; Areeb et al, 2021 ). In an alkaline medium, RhB appears colorless, but in an acidic one, it appears pink.…”

Section: Introductionmentioning

confidence: 99%

Perovskite LaNiO3/Ag3PO4 heterojunction photocatalyst for the degradation of dyes

et al. 2022

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Pristine lanthanum nickelate (LaNiO3), silver phosphate (Ag3PO4) and perovskite lanthanum nickelate silver phosphate composites (LaNiO3/Ag3PO4) were prepared using the facile hydrothermal method. Three composites were synthesized by varying the percentage of LaNiO3 in Ag3PO4. The physical properties of as-prepared samples were studied by powder X-ray diffraction (pXRD), Fourier-transform infrared (FT-IR), Scanning electron microscopy (SEM) and Energy-dispersive X-ray (EDX). Among all synthesized photocatalysts, 5%LaNiO3/Ag3PO4 composite has been proved to be an excellent visible light photocatalyst for the degradation of dyes i.e., rhodamine B (RhB) and methyl orange (MO). The photocatalytic activity and stability of Ag3PO4 were also enhanced by introducing LaNiO3 in Ag3PO4 heterojunction formation. Complete photodegradation of 50 mg/L of RhB and MO solutions using 25 mg of 5%LaNiO3/Ag3PO4 photocatalyst was observed in just 20 min. Photodegradation of RhB and MO using 5%LaNiO3/Ag3PO4 catalyst follows first-order kinetics with rate constants of 0.213 and 0.1804 min−1, respectively. Perovskite LaNiO3/Ag3PO4 photocatalyst showed the highest stability up to five cycles. The photodegradation mechanism suggests that the holes (h+) and superoxide anion radicals O2 •− plays a main role in the dye degradation of RhB and MO.

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Section: Introductionmentioning

confidence: 99%

Perovskite LaNiO3/Ag3PO4 heterojunction photocatalyst for the degradation of dyes

et al. 2022

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“…Surfactants, dyes and heavy metals are being widely utilized in our life, and their entry into the environment poses many risks to plants, human health and the environment (Palanisamy et al 2020). Therefore, freshwater puri cation and quality water supply have become important global challenges (Areeb et al 2021). So far, diverse methods such as surface adsorption, biological degradation and membrane-based separation have been employed to purify and remove organic compounds and dyes (Maleki and Esmaeili 2022;Hashimi et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Activated carbon/ZnO-Ni nanoflower composite as an efficient photocatalyst for enhanced degradation of reactive red 120 dye under LED light

Norozi

Mansouri

Karamian

et al. 2023

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In this research, ZnO doped Ni was immobilized over activated carbon nanoparticles, and the prepared photocatalysts were characterized by FTIR, XRD, SEM, EDS, and BET analyses and used for the degradation of reactive red 120 (RR120) dye under LED light irradiation. The C/ZnO-Ni photocatalyst demonstrated a flower-like morphology with mesoporous features. The effect of the main parameters like Zn:Ni molar ratio, photocatalyst amount, carbon mesh size, solution pH, initial RR120 concentration, H2O2 and power of LED lamp was investigated to maximize the efficiency of RR120 degradation. The best photocatalytic RR120 degradation of 94.88% was observed under the optimum conditions in which Zn:Ni molar ratio, photocatalyst amount, carbon mesh size, solution pH, initial RR120 concentration, H2O2 and power of LED lamp were adjusted at 1:2, 50 mg, 270, 3, 5 ppm, 0.2 mL and 50 W, respectively. Kinetic studies confirmed the applicability of the Langmuir-Hinshelwood theory by which the dye concentration is a first-order function of time. The reusability study of the C/ZnO-Ni photocatalyst showed good stability of the photocatalyst after recycling 7 times under the optimum conditions.

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“…Photocatalysis refers to the acceleration of a photoreaction involving a catalyst. Among various advanced oxidation processes, semiconductor mediated photocatalysis have proven to be specifcally remarkable in current era because of their high capability for mineralization of organic pollutants present in the environment [4,5]. Bismuth based compounds such as Bi 2 O 3 , Bi 2 WO 6 , BiVO 4 , Bi 2 MoO 6 , BiOX (X � Cl, Br, I), and Bi 12 GeO 20 have been emerged as visible light driven photocatalysts associated with high oxidation performance and charge mobility which results excellent photocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Environmental Applications of Cu-Ni-Doped Bismuth Molybdate

Sehar,

Saeed,

Murtaza

et al. 2023

Nanomaterials and Nanotechnology

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Bismuthoxide-based catalysts gained attention for photocatalytic remediation of environmental pollutants owing to their low cost, feasibility, stability, small, and tunable band gap. In the present work, bismuth molybdate was modified via transition metal doping to achieve maximum catalytic efficiency. This aim was accomplished by synthesizing novel Cu2+ and Ni2+ codoped bismuth molybdate (CuNi/Bi2MoO6, Cu/Bi2MoO6, and Ni/Bi2MoO6) which were utilized for heavy metal reduction and dyes degradation. Pure bismuth molybdate was also fabricated for comparative studies. All the prepared samples were characterized by XRD, Raman spectroscopy, SEM, and EDX. Optical studies for band gap calculations were carried out by UV-Visible spectrophotometry and decrease in band gap was observed in doped materials. Pseudo-first-order kinetic studies were performed to find the rate constants and regression values for Cr(VI) reduction and degradation of rhodamine B and malachite green using CuNi/Bi2MoO6. Codoped bismuth molybdate exhibited more than 95% photocatalytic performance for Cr(VI) reduction and degradation of rhodamine B and malachite green dyes. Reusability of catalyst was confirmed up to six cycles. Considering its catalytic proficiency, CuNi/Bi2MoO6 is anticipated to be utilized for more environment friendly applications in future.

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Green photocatalyst Cu/NiO doped zirconia for the removal of environmental pollutants

Cited by 18 publications

References 70 publications

Perovskite LaNiO3/Ag3PO4 heterojunction photocatalyst for the degradation of dyes

Perovskite LaNiO3/Ag3PO4 heterojunction photocatalyst for the degradation of dyes

Activated carbon/ZnO-Ni nanoflower composite as an efficient photocatalyst for enhanced degradation of reactive red 120 dye under LED light

Synthesis, Characterization, and Environmental Applications of Cu-Ni-Doped Bismuth Molybdate

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