Photocatalytic degradation of congo red dye using nickel–titanium dioxide nanoflakes synthesized by Mukia madrasapatna leaf extract

Karuppusamy, Indira; Shanmugam, Sabarathinam; Hari, Anjana; Vasantharaj, Seerangaraj; Sathiyavimal, Selvam; Brindhadevi, Kathirvel; Askary, Ahmad El; Elfasakhany, Ashraf; Pugazhendhi, Arivalagan

doi:10.1016/j.envres.2021.111647

Cited by 58 publications

(12 citation statements)

References 37 publications

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“…The degradation of organic dyes, such as methylene blue and rhodamine B, by NiO nanoparticles has been reported. Additionally, it has good gas-sensitive performance [ 21 , 22 , 23 , 24 ]. Bai et al successfully synthesized rGO–NiO/ZnO composite materials by the hydrothermal method and hydrazine hydrate reduction method, and used them for the detection of NO 2 .…”

Section: Introductionmentioning

confidence: 99%

The Oxygen Vacancy Defect of ZnO/NiO Nanomaterials Improves Photocatalytic Performance and Ammonia Sensing Performance

Zhang

2022

Nanomaterials

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In this paper, ZnO/NiO composites rich in oxygen vacancies are prepared by the solvothermal method and reduction method. In the test, through the use of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscope (TEM), diffuse reflectance spectroscopy (DRS), photoluminescence spectroscopy (PL), and electron paramagnetic resonance (EPR), we effectively prove the existence of phase, morphology and oxygen vacancies in the material. Through the photocatalysis test and gas sensitivity test, it is found that 10% Ni doped OZN-10 has the best photocatalytic activity and gas sensitivity characteristics. The degradation rate of methylene blue (MB) was 98%. The gas sensitivity test shows that OZN-10 has good selectivity, good response performance (3000 ppm, 27,887%) and excellent response recovery time (response time: 50 s, recovery time: 5–7 s) for saturated NH3 gas at standard atmospheric pressure (101.325 KPa) and room temperature (25 °C). The synergistic effect of oxygen vacancy as the center of a trap and p–n heterojunction forming an electric potential field at the interface is explained, and the mechanism of improving photocatalysis and gas sensitivity is analyzed. This work will provide an innovative vision for dual-performance oxygen vacancy modification of heterojunctions through photocatalysis.

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Section: Introductionmentioning

confidence: 99%

The Oxygen Vacancy Defect of ZnO/NiO Nanomaterials Improves Photocatalytic Performance and Ammonia Sensing Performance

Zhang

2022

Nanomaterials

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“…Recently, Indira and colleagues prepared Ni–TiO 2 nanoflakes using the leaf extract of Mukia madrasapatna and their photocatalytic potential in wastewater was analysed. Results indicated that the Congo red dye was degraded by UV illumination [ 143 ]. In another study, niobium‐doped TiO 2 nanotubes (Nb–TNT) were developed via dip coating route for the catalytic degradation of organic pollutants and the results demonstrated excellent charge separation efficiency [ 144 ].…”

Section: Tio 2 Nps In Environmental Remediationmentioning

confidence: 99%

Diverse biotechnological applications of multifunctional titanium dioxide nanoparticles: An up‐to‐date review

Javed

Ain

Gul

et al. 2022

IET Nanobiotechnology

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Titanium dioxide (TiO 2 ) nanoparticles (NPs) are one of the topmost widely used metallic oxide nanoparticles. Whether present in naked form or doped with metals or polymers, TiO 2 NPs perform immensely important functions. However, the alteration in size and shape by doping results in improving the physical, chemical, and biological behaviour of TiO 2 NPs. Hence, the differential effects of various TiO 2 nanostructures including nanoflakes, nanoflowers, and nanotubes in various domains of biotechnology have been elucidated by researchers. Recently, the exponential growth of research activities regarding TiO 2 NPs has been observed owing to their chemical stability, low toxicity, and multifaceted properties. Because of their enormous abundance, plants, humans, and environment are inevitably exposed to TiO 2 NPs. These NPs play a significant role in improving agricultural attributes, removing environmental pollution, and upgrading the domain of nanomedicine. Therefore, the currently ongoing studies about the employment of TiO 2 NPs in enhancement of different aspects of agriculture, environment, and medicine have been extensively discussed in this review.

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“…12 , 13 Additionally, advanced oxidation processes, including photocatalytic and photo-Fenton oxidation, were reported as being highly effective for dye removal. 14 , 15 Such advanced oxidation techniques facilitate considerable degradation of dyes and the mineralization of dye molecules into environmental end products in the presence of sunlight or artificial light sources. 5 , 16 Several factors control the suitability of the adsorbent and catalyst used during the oxidation processes, including recyclability, biodegradability, bandgap energy, recombination rate, thermal stability, safety, fabrication cost, and adsorption capacity.…”

Section: Introductionmentioning

confidence: 99%

“…CR is widely used in the paper, cosmetics, leather, and textile industries. , However, the seepage of dissolved CR molecules into water resources induces marked toxicity and environmental effects. , The presence of CR molecules depletes dissolved oxygen in the water and its distribution during photosynthesis, thereby having a negative impact on the aquatic ecosystem . Moreover, there are several health-related side effects associated with CR pollution, including respiration problems, vomiting, carcinogenic and mutagenic effects, and diarrhea. , Decontamination of CR molecules from water using innovative and low-cost techniques has been widely conducted; , adsorption was recommended as an effective removal technique for dissolved dyes owing to its simplicity, high efficiency, recyclability, and low cost. , Additionally, advanced oxidation processes, including photocatalytic and photo-Fenton oxidation, were reported as being highly effective for dye removal. , Such advanced oxidation techniques facilitate considerable degradation of dyes and the mineralization of dye molecules into environmental end products in the presence of sunlight or artificial light sources. , Several factors control the suitability of the adsorbent and catalyst used during the oxidation processes, including recyclability, biodegradability, bandgap energy, recombination rate, thermal stability, safety, fabrication cost, and adsorption capacity …”

Section: Introductionmentioning

confidence: 99%

Enhanced Congo Red Adsorption and Photo-Fenton Oxidation over an Iron-Impeded Geopolymer from Ferruginous Kaolinite: Steric, Energetic, Oxidation, and Synergetic Studies

et al. 2022

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An iron-impeded geopolymer (Fe/GP) was synthesized from natural ferruginous kaolinite and optical waste for enhanced decontamination of Congo red (CR) dye. The adsorption properties of Fe/GP were assessed using an advanced monolayer equilibrium model of one energy ( R 2 > 0.99). Fe/GP possessed an active site density of 391.3 mg/g, which induced an adsorption capacity of 634 mg/g at the saturation state. The number of adsorbed CR molecules per site ( n = 1.56–1.62) reflected the possible uptake of two molecules per site via a multimolecular mechanism. The adsorption energy (5.12–5.7 kJ/mol) reflected the physical adsorption of the CR molecules via hydrogen bonding and/or van der Waals forces. As a catalyst, notable activity toward photo-Fenton oxidation was achieved even at high CR concentrations. Complete oxidation was observed after 30 (CR concentration: 10 mg/L), 50 (20 mg/L), 80 (30 mg/L), 120 (40 mg/L), and 140 min (50 mg/L). High oxidation efficiency was achieved using 0.1 g/L Fe/GP, 0.1 mL of hydrogen peroxide (H 2 O 2 ), and a visible light source. Increasing the Fe/GP dosage to 0.3 g/L resulted in complete oxidation of CR (100 mg/L) after 220 min. Therefore, synthetic Fe/GP can be used as a low-cost and superior catalyst and adsorbent for the removal of CR-based contaminants via adsorption or advanced oxidation processes.

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Photocatalytic degradation of congo red dye using nickel–titanium dioxide nanoflakes synthesized by Mukia madrasapatna leaf extract

Cited by 58 publications

References 37 publications

The Oxygen Vacancy Defect of ZnO/NiO Nanomaterials Improves Photocatalytic Performance and Ammonia Sensing Performance

The Oxygen Vacancy Defect of ZnO/NiO Nanomaterials Improves Photocatalytic Performance and Ammonia Sensing Performance

Diverse biotechnological applications of multifunctional titanium dioxide nanoparticles: An up‐to‐date review

Enhanced Congo Red Adsorption and Photo-Fenton Oxidation over an Iron-Impeded Geopolymer from Ferruginous Kaolinite: Steric, Energetic, Oxidation, and Synergetic Studies

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