Sunlight mediated photocatalytic degradation of organic pollutants by statistical optimization of green synthesized NiO NPs as catalyst

Roopan, Selvaraj Mohana; Elango, Ganesh; Priya, Duraipandi Devi; Asharani, Indira Viswambaran; Kishore, Basker; Vinayprabhakar, Sharma; Pragatheshwaran, Narayanan; Mohanraj, K.; Harshpriya, Rajan; Shanavas, S.; Acevedo, R.

doi:10.1016/j.molliq.2019.111509

Cited by 39 publications

(8 citation statements)

References 41 publications

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“…7 Nanoparticles have played a significant role in the bioremediation and treatment of polluted water by organic and nonorganic materials. 2 There are three fundamental practices for nanoparticle synthesis such as chemical, biological, and physical approaches. Chemical and physical methods require more investment and consume more time, which likely results in toxic final products.…”

Section: Introductionmentioning

confidence: 99%

“…Dye pollutants result in several health hazards such as skin- and eye-related diseases. Most dyes are toxic and pose a threat to aquatic living organisms …”

Section: Introductionmentioning

confidence: 99%

“…Conventional oxidation processes do not oxidize dyestuff with complex structures, and thus advanced oxidation processes are introduced for dye degradation . There are many methods for degradation of dyes in wastewater including physical, chemical, and biological approaches, but degradation and maintenance costs of most of these methods are high and some of these processes will produce a secondary waste product that needs further treatment, so using them for the treatment of wastewaters is not suitable and economical …”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Nickel Oxide Nanoparticles and Copper-Doped Nickel Oxide Nanocomposites Using Phytolacca dodecandra L’Herit Leaf Extract and Evaluation of Its Antioxidant and Photocatalytic Activities

2022

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Nanotechnology research is emerging as cutting-edge technology, and nanoparticles (NPs) and nanocomposites (NCs) have played a significant role in the bioremediation and treatment of polluted water by organic and nonorganic materials. Nanoparticles produced by plant extracts are more stable and biocompatible in comparison with those produced by physical and chemical methods. This research focuses on the synthesis of NiO NPs and Cu–NiO NCs using Phytolacca dodecandra L’Herit (P.d) leaf extract and evaluation of their antioxidant and photocatalytic activities. Cu–NiO NCs were synthesized using 50 mL of 0.1 M nickel(II) nitrate hexahydrate, 10 mL of 0.1 M copper(II) nitrate trihydrate, and 20 mL of leaf extract. The synthesized nanoparticles were characterized by UV–vis, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM) analyses to study the energy band gap, average crystallite size, functional groups, and morphology of the samples, respectively. The UV–vis analysis showed a red shift after copper doping, indicating a decrease in the optical band gap values. FT-IR characterization confirms the presence of various functional groups in samples. Crystallite sizes of the formed particles were obtained to be 14.18 and 16.10 nm from the XRD data for NiO NPs and Cu–NiO NCs, respectively. SEM showed the crystallinity of particles with a cubic structure. The photocatalytic degradation of methylene blue (MB) was found to be 78.3 and 97.8% by NiO NPs and Cu–NiO NCs, respectively. In the antioxidant test, NiO NPs and Cu–NiO NCs prevented the oxidation of 50% of the H2O2 molecules at a concentration of 363.96 and 350.29 μg/mL, respectively. Finally, the synthesized samples showed good photocatalytic and antioxidant activities.

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Section: Introductionmentioning

confidence: 99%

“…Dye pollutants result in several health hazards such as skin- and eye-related diseases. Most dyes are toxic and pose a threat to aquatic living organisms …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of Nickel Oxide Nanoparticles and Copper-Doped Nickel Oxide Nanocomposites Using Phytolacca dodecandra L’Herit Leaf Extract and Evaluation of Its Antioxidant and Photocatalytic Activities

2022

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“…Some of the essential properties of metal oxide nanoparticles are their antibacterial activity against gram-negative bacteria and gram-positive bacteria (8,9), in which nanoparticles cause them to be inactivated by binding to biological macromolecules and consequently lead to the annihilation of bacteria, viruses, and fungi (10,11). Among the metal oxide nanoparticles, NiO is a p-type semiconductor with electrochemical, catalytic, photocatalytic, and antibacterial properties (12,13), while containing an strong antimicrobial effect against a wide range of microorganisms, even at deficient concentrations (14). The detected features of NiO-NPs include high chemical stability, low dielectric constant, rechargeable batteries, high catalytic activity, and intelligent drugs, as well as being applicable as an energy storage in supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

Green-based bio-synthesis of nickel oxide nanoparticles in Arabic gum and examination of their cytotoxicity, photocatalytic and antibacterial effects

Sabouri

Akbari

Hosseini

et al. 2021

Green Chemistry Letters and Reviews

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In the current paper, NiO-NPs were synthesized through a sol-gel method by the usage of a biocompatible polymer known as Arabic gum (GA) as a stabilizing agent. The structural, optical, and magnetic properties of the obtained product was investigated by the application of TGA/ DTA, FT-IR, UV-Vis, XRD, FESEM/EDX, and VSM analyzes. The FESEM images of NiO-NPs displayed its spherical shape and average size of about 59 nm. The antimicrobial activity of NiO-NPs was investigated against Gram-positive bacteria including Staphylococcus aureus, Bacillus subtilis and Gram-negative bacteria including Escherichia coli, Pseudomonas aeruginosa. The achieved findings indicated that all of the bacterial resistance was attributed to NiO-NPs, except for the case of Bacillus subtilis bacteria that did not grow at the concentration of 10 mM. We also evaluated the photocatalytic activity of nanoparticles in regards to the MB degradation and observed a photocatalytic degradation efficiency of about 80% throughout the results. The cytotoxicity of NiO-NPs has evaluated towards the cancer U87MG cell and normal Nervous Neurospheres (NCs) cells lines by means of MTT method. Detailed in vitro biological activities revealed the significant therapeutic potential of NiO-NPs. This product was able to exhibit potent cytotoxicity against U87MG cancer cells (IC 50 : 37.84 μg mL −1 ).

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“…11 NiO have been reported as effective photocatalyst in slurry form for various organic pollutants such as crystal violet dye, 12 Rodamine B dye 13 Congo red, and nitrophenol. 14 In the present work, structural, optical, and morphology of PVDF/PVA polymer blend doped with various concentrations of NiO NPs for photocatalytic degradation of malachite green dye is studied as an immobilized supported catalyst that could be readily recycled without even any separation steps or catalysis recovery technologies as promising technique for textile wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

Structural characterization of PVDF/PVA polymer blend film doped with different concentration of NiO NPs for photocatalytic degradation of malachite green dye under visible light

Ismail

Nasr

2021

J of Applied Polymer Sci

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Structural, optical and photodegradation performance of PVDF/PVA polymer blend doped with different concentration of NiO NPs were studied using casting technique method. The effect of adding NiO NPs on PVDF/PVA are investigated using X-ray Diffraction (XRD), High Resolution Transmission Electron Microscope (HRTEM), Fourier Transform Infrared-Attenuated Total Reflection (FTIR-ATR), Ultraviolet-Visible Spectroscopy (UV-Vis), and High Resolution Scanning Electron Microscope (HRSEM). XRD results showed that the addition of NiO NPs increase the crystallinity of PVDF/PVA. The appearance and shifting of bands in FTIR-ATR indicate the structural change in the PVDF/PVA with adding NiO NPs combined with decrease in the band gap of nanocomposite films compared to pure blend in UV-Vis confirmed the incorporation of NiO NPs in PVDF/PVA. HRTEM shows

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Sunlight mediated photocatalytic degradation of organic pollutants by statistical optimization of green synthesized NiO NPs as catalyst

Cited by 39 publications

References 41 publications

Synthesis of Nickel Oxide Nanoparticles and Copper-Doped Nickel Oxide Nanocomposites Using Phytolacca dodecandra L’Herit Leaf Extract and Evaluation of Its Antioxidant and Photocatalytic Activities

Synthesis of Nickel Oxide Nanoparticles and Copper-Doped Nickel Oxide Nanocomposites Using Phytolacca dodecandra L’Herit Leaf Extract and Evaluation of Its Antioxidant and Photocatalytic Activities

Green-based bio-synthesis of nickel oxide nanoparticles in Arabic gum and examination of their cytotoxicity, photocatalytic and antibacterial effects

Structural characterization of PVDF/PVA polymer blend film doped with different concentration of NiO NPs for photocatalytic degradation of malachite green dye under visible light

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