Synthesis of nanocauliflower ZnO photocatalyst by potato waste and its photocatalytic efficiency against dye

Alharthi, Fahad A.; Al‐Zaqri, Nabil; Marghany, Adel El; Alghamdi, Abdulaziz; Alorabi, Ali Q.; Baghdadi, Neazar; Al-Shehri, Hamza S.; Wahab, Rizwan; Ahmad, Naushad

doi:10.1007/s10854-020-03701-3

Cited by 25 publications

(8 citation statements)

References 51 publications

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“…To test the adsorption efficiencies of CV, MB and RB dyes onto four adsorbents: untreated AJL and untreated AJF, NAJL and NAJF powder adsorbent, the batch adsorption was applied. CV dye adsorption experiment was executed under different temperature (25, 35 and 45°C), pH solution (3)(4)(5)(6)(7)(8)(9)(10)(11), adsorbent dose (1-100 mg), contact time (5-120 min), initial CV dye concentration (50-250 mg/L). In general, a definite amount of adsorbents was added to the conical flask containing 50 mL of CV dye solution with a certain initial concentration at the preferred pH value and temperature.…”

Section: Adsorption Studiesmentioning

confidence: 99%

“…According to a recent report, about 10 thousand various types are produced with a rate of more than 700 thousand tons/year, and most of the dyes available in the market [2]. Dyes such as malachite green (MG), methylene blue (MB) and crystal violet (CV) have a negative effect on water quality, and it is carcinogenic dyes that can potentially affect human as well as animal life [3][4][5]. Hence, the removal of toxic dyes poses challenges to the researchers in finding excellent methods for the elimination of dyes before their release into the aqueous environment.…”

Section: Introductionmentioning

confidence: 99%

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Effective adsorption of crystal violet from aqueous solutions with effective adsorbent: equilibrium, mechanism studies and modeling analysis

Al-Shehri¹,

Almudaifer

Alorabi

et al. 2021

Environmental Pollutants and Bioavailability

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In this work, NaOH-activated Aerva javanica leaf (NAJL) powder was successfully developed as a cost-effective adsorbent for removal of crystal violet (CV) from an aqueous environment. The prepared adsorbent was characterized using FTIR, SEM, and their surface area was determined by BET technique. Different parameters affecting the adsorption of CV dye such as pH solution, adsorbent dose, equilibrium time, initial CV concentration, and temperature were investigated. The results revealed that the best-optimized values were found as pH-9, dose-20 mg, time-30 min, temperature-25 °C . The adsorption experimental data exhibited excellently fitted well to the nonlinear Langmuir isotherm and Pseudo-first-order kinetic models. The maximum monolayer adsorption capacity of CV dye was 315.2 mg/g. The experimental parameters of thermodynamic analysis exhibited that the CV dye adsorption onto NAJL powder was exothermic and spontaneous. Electrostatic attraction, π-π interactions, and Hydrogen bonding were the mechanism behind the adsorption of CV dye.

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Section: Adsorption Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effective adsorption of crystal violet from aqueous solutions with effective adsorbent: equilibrium, mechanism studies and modeling analysis

Al-Shehri¹,

Almudaifer

Alorabi

et al. 2021

Environmental Pollutants and Bioavailability

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“…Excessive release of MB dye causes abnormal colorization of surface water, hinders sunlight penetration, and reduces oxygen dissolution, which affects the photosynthesis of aquatic plants [6]. Therefore, dye molecules cause serious threats to the environmental system and health of humans that include carcinogenicity, dysfunction of the brain, kidneys, and liver [7][8][9]. A large amount of MB (more than 7.0 mg kg −1 ) can lead to mental disorders, high blood pressure, abdominal pain, and nausea [10].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Methylene Blue by Biosorption on Alkali-Treated Solanum incanum: Isotherms, Equilibrium and Mechanism

Al-Shehri¹,

Alanazi

Shaykhayn

et al. 2022

Sustainability

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In this study, a new bio-adsorbent (NASIF) was successfully prepared via chemical activation of Solanum incanum (SI) with hydrogen peroxide and sodium hydroxide reagents as an inexpensive and effective adsorbent for the removal of methylene blue (MB) from aqueous media. The morphology of the NASIF adsorbent surface and the nature of the potential MB interactions were examined by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) micrograph. FTIR results suggested that carboxyl, carbonyl, and hydroxyl groups were involved in MB adsorption on the NASIF surface. EDX analysis confirmed the successful increase of oxygen-containing functional groups during the chemical activation. The influence of important factors was studied using the batch method. The results revealed that the maximum removal efficiency was 98% at contact time: 120 min; pH: 6.5, adsorbent dose: 40 mg; and temperature-25 °C. Isothermal behavior was evaluated using three non-linear isotherm models, Langmuir, Freundlich, and D–R isotherm. MB adsorption onto NASIF adsorbent followed the Langmuir isotherm model with maximum monolayer capacity (mg/g) at 25 °C. Meanwhile, the PSO kinetics model was found to be better than PFO kinetic model for describing the adsorption process using kinetic models. Based on the D–R model, the free energy (E, kJ mol−1) values were in the range of 0.090–0.1812 kJ mol−1, which indicated that the MB adsorption onto NASIF may belong to physical adsorption. The adsorption mechanism of MB onto NASIF adsorbent mainly includes electrostatic attraction, π-π interaction, n-π interaction, and H-bonding. The thermodynamic parameters revealed that the adsorption process was a feasibility, spontaneous and exothermic process. Finally, the result of the present work could provide strong evidence of the potential of NASIF adsorbent for eliminating MB from aqueous media.

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“…For the development of ZnO compositions, the sol-gel procedure has been interesting between these procedures. For example, the sol-gel procedure has been applied to formation of Zn1-xZrxO (x = 0.00, 0.01, 0.03 and 0.05) nanoparticles [29][30][31]. It is found that the dopant has significantly influenced the electrochemical implementation individually and simultaneously toward uric acid and superb yields have been achieved via the Zr-doped ZnO modified carbon paste electrode (MCPE) [32].…”

Section: Introductionmentioning

confidence: 99%

Sol-gel zinc oxide nanoparticles: advances in synthesis and applications

et al. 2021

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Zinc oxide nanoparticles (ZnO) exhibit numerous characteristics such as biocompatibility, UV protection, antibacterial activity, high thermal conductivity, binding energy, and high refractive index that make them ideal candidates to be applied in a variety of products like solar cells, rubber, cosmetics, as well as medical and pharmaceutical products. Different strategies for ZnO nanoparticles’ preparation have been applied: sol-gel method, co-precipitation method, etc. The sol-gel method is an economic and efficient chemical technique for nanoparticle (NPs) generation that has the ability to adjust the structural and optical features of the NPs. Nanostructures are generated from an aqueous solution including metallic precursors, chemicals for modifying pH using either a gel or a sol as a yield. Among the various approaches, the sol-gel technique was revealed to be one of the desirable techniques for the synthesis of ZnO nanoparticles. In this review, we explain some novel investigations about the synthesis of zinc oxide nanoparticles via sol-gel technique and applications of sol-gel zinc oxide nanoparticles. Furthermore, we study recent sol-gel ZnO nanoparticles, their significant characteristics, and their applications in biomedical applications, antimicrobial packaging, drug delivery, semiconductors, biosensors, catalysts, photoelectron devices, and textiles.

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Synthesis of nanocauliflower ZnO photocatalyst by potato waste and its photocatalytic efficiency against dye

Cited by 25 publications

References 51 publications

Effective adsorption of crystal violet from aqueous solutions with effective adsorbent: equilibrium, mechanism studies and modeling analysis

Effective adsorption of crystal violet from aqueous solutions with effective adsorbent: equilibrium, mechanism studies and modeling analysis

Adsorption of Methylene Blue by Biosorption on Alkali-Treated Solanum incanum: Isotherms, Equilibrium and Mechanism

Sol-gel zinc oxide nanoparticles: advances in synthesis and applications

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