Lemon peel guided sol-gel synthesis of visible light active nano zinc oxide

Abarna, B.; Preethi, T.; Rajarajeswari, G. R.

doi:10.1016/j.jece.2018.10.056

Cited by 12 publications

(8 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The second weight loss was noticed in the temperature range from 260 to 380 °C and is attributed to the degradation of hemicellulose, pectin, and lignin. 19 The third step is related to further decomposition of the organic residuals (cellulose moieties). No considerable weight loss was observed above 470 °C.…”

Section: Resultsmentioning

confidence: 99%

“…Using Mandarin Orange Peel (ZMPNPs). The ZnO NPs were prepared following the modified method described by Abarna et al 19 Briefly, 3 g of Zn(CH 3 COO) 2 • 2H 2 O or 3 g of Zn(NO 3 ) 2 •6H 2 O was added separately to 90 mL ethanol and kept in a water bath as presented in Figure 1 (panel I). Then, 1 g of powdered mandarin peel was added to each glass beaker, and the mixture was stirred for half an hour.…”

Section: Preparation Of Zno Npsmentioning

confidence: 99%

See 1 more Smart Citation

An Eco-friendly Approach to ZnO NP Synthesis Using Citrus reticulata Blanco Peel/Extract: Characterization and Antibacterial and Photocatalytic Activity

Vasiljevic,

Vunduk,

Bartolic

et al. 2024

ACS Appl. Bio Mater.

View full text Add to dashboard Cite

Emission of greenhouse gases and infectious diseases caused by improper agro-waste disposal has gained significant attention in recent years. To overcome these hurdles, agro-waste can be valorized into valuable bioactive compounds that act as reducing or stabilizing agents in the synthesis of nanomaterials. Herein, we report a simple circular approach using Citrus reticulata Blanco (C. reticulata) waste (peel powder/ aqueous extract) as green reducing and capping/stabilizing agents and Zn nitrate/acetate precursors to synthesize ZnO nanoparticles (NPs) with efficient antimicrobial and photocatalytic activities. The obtained NPs crystallized in a hexagonal wurtzite structure and differed clearly in their morphology. UV−vis analysis of the nanoparticles showed a characteristic broad absorption band between 330 and 414 nm belonging to ZnO NPs. Fourier transform infrared (FTIR) spectroscopy of ZnO NPs exhibited a Zn−O band close to 450 cm −1 . The band gap values were in the range of 2.84−3.14 eV depending on the precursor and agent used. The crystallite size obtained from size−strain plots from measured XRD patterns was between 7 and 26 nm, with strain between 16 and 4%. The highly crystalline nature of obtained ZnO NPs was confirmed by clear ring diffraction patterns and d-spacing values of the observed lattice fringes. ZnNPeelMan_400 and ZnNExtrMan showed good stability, as the zeta potential was found to be around −20 mV, and reduced particle aggregation. Photoluminescence analysis revealed different defects belonging to oxygen vacancies (V O + and V O +2 ) and zinc interstitial (Zn i ) sites. The presence of oxygen vacancies on the surface of ZnAcExtrMan_400 and ZnAcPeelMan_400 increased antimicrobial activity, specifically against Gram-negative bacteria Escherichia coli (E. coli) and Salmonella enteritidis (S. enteritidis). ZnNExtrMan with a minimal inhibitory concentration of 0.156 mg/mL was more effective against Gram-positive bacteria Staphylococcus aureus (S. aureus), revealing a high influence of particle size and shape on antimicrobial activity. In addition, the photocatalytic activity of the ZnO NPs was examined by assessing the degradation of acid green dye in an aqueous solution under UV light irradiation. ZnAcPeelMan_400 exhibited excellent photocatalytic activity (94%) within 90 min after irradiation compared to other obtained ZnO NPs.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Preparation Of Zno Npsmentioning

confidence: 99%

An Eco-friendly Approach to ZnO NP Synthesis Using Citrus reticulata Blanco Peel/Extract: Characterization and Antibacterial and Photocatalytic Activity

Vasiljevic,

Vunduk,

Bartolic

et al. 2024

ACS Appl. Bio Mater.

View full text Add to dashboard Cite

show abstract

“…For other dyes, such as acid orange 7, only a slight decrease in performance was observed and even though, it remained above 80% after six runs for MMa catalysts (Silvestri et al 2019). The crystal violet removal decrease only 5% during the fourth cycle of reuse and 15% in the fth cycle, which was assigned to the loss of material during the recovery process and the decrease in active sites available on the material surface (Abarna et al 2019).…”

Section: Reusability and Stabilitymentioning

confidence: 95%

“…In addition, they have similar conduction and valence bands position. However, some important drawbacks are their quick recombination of hole-electron pairs and their very low performance in the visible range of the solar spectrum irradiation (Abarna et al 2019;Djellabi et al 2019;Fazal et al 2020). In practice, photocatalytic reactions are performed under UV light as small amounts of photons can be absorbed in the visible range, which increases the overall costs of the process (Colmenares et Therefore, the development of new photocatalysts come into sight to be a necessary step to push forward the current photocatalytic performance (Nemiwal et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Design of biomass-based composite photocatalysts for wastewater treatment: a review over the past decade and future prospects

Pastre

Cunha

Marques

2022

Environ Sci Pollut Res

View full text Add to dashboard Cite

Biomass-based composites (BCPs) have been investigated for more than one decade as photocatalysts for pollutants´ water treatment, however their technological application remains restricted. The systematic review performed aims to exhibit the latest advancement in photocatalytic degradation of pollutants in aqueous solution by BCPs synthesized with biomass and TiO 2 and/or ZnO, and to identify the necessary steps to achieve BCPs large scale application. Multivariate data analysis approach was performed to identify trend relationships between the BCPs synthesis method, the experimental conditions, and the BCPs characteristics correlated with the observed removal e ciency and the photodegradation kinetics. The results indicated the relevance of adsorption processes on the pollutants removal e ciency, re ected by the principal component analysis (PCA) performed on all categories of pollutants (PCA_pol). Furthermore, the PCA applied to textile dyes (PCA_dyes) and pharmaceutical compounds (PCA_pharma) also indicate the in uence of variables related to the composite synthesis (i.e. thermal treatment and time spent on BCPs synthesis) and photocatalytic experimental parameters (catalyst concentration, pollutant concentration and irradiation time) on the degradation kinetic accomplished by BCPs. The characterization of composites reveals that the speci c surface area and the narrow band gap are key characteristics for BCPs to serve as a competitive photocatalyst. The stability and recyclability of the BCPs are also discussed as necessary properties to overcome the experimental/lab scale phase and to move to full-scale applications. Further investigations are recommended to assess the performance of BCPs when treating real water, compared to commercial catalysts, as well as cost evaluation.

show abstract

“…Indeed, a chemical (wet) process plays a significant role in the synthesis of the ZnO with very small particle size, known as active ZnO (A-ZnO). This process could be done by a variety of techniques, for example, mechanochemical process, [4][5][6][7] controlled precipitation, [8][9][10] sol-gel method, [11][12][13][14][15] hydrothermal, [16][17][18][19][20] solvothermal, [21][22][23] sonochemical, [24][25][26][27] and so forth.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of zinc oxide‐coated microcrystalline cellulose and its application in truck tire tread compounds

Boopasiri

Thaptong

Sae‐Oui

et al. 2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

The severe threat to aquatic environment from zinc oxide (ZnO) in tread debris has become a serious issue for tire manufacturers. Various attempts including the utilization of composite ZnO have therefore been made to reduce ZnO content in tread compounds. In this study, a new composite ZnO was prepared by depositing ZnO nanoparticles on microcrystalline cellulose (MCC) through hydrothermal reactions, called M-ZnO. After characterization by various techniques, cure activation efficiency of M-ZnO in truck tire tread compound was investigated and compared with that of active ZnO (A-ZnO).The results showed that M-ZnO contained approximately 66.7% w/w of ZnO and had comparable specific surface area to A-ZnO. Regardless of the ZnO type, crosslink density increased with increasing ZnO content up to 3 phr leading to the improved mechanical properties of the rubber vulcanizates, that is, hardness, modulus, and abrasion resistance. Tensile and tear strengths, however, were found maximum at 2 phr of both A-ZnO and M-ZnO. Although wet grip index was independent of ZnO content, rolling resistance tended to reduce with increasing ZnO content. The results clearly show the great potential of utilizing M-ZnO to replace conventional A-ZnO in tread compounds when more stringent environmental regulations are imposed.

show abstract

Lemon peel guided sol-gel synthesis of visible light active nano zinc oxide

Cited by 12 publications

References 18 publications

An Eco-friendly Approach to ZnO NP Synthesis Using Citrus reticulata Blanco Peel/Extract: Characterization and Antibacterial and Photocatalytic Activity

An Eco-friendly Approach to ZnO NP Synthesis Using Citrus reticulata Blanco Peel/Extract: Characterization and Antibacterial and Photocatalytic Activity

Design of biomass-based composite photocatalysts for wastewater treatment: a review over the past decade and future prospects

Fabrication of zinc oxide‐coated microcrystalline cellulose and its application in truck tire tread compounds

Contact Info

Product

Resources

About