Sustainable engineering of plant-synthesized TiO2 nanocatalysts: Diagnosis, properties and their photocatalytic performance in removing of methylene blue dye from effluent. A review

Zeebaree, Aymn Yaseen Sharaf; Zeebaree, Samie Yaseen Sharaf; Rashid, Rzgar Farooq; Zebari, Osama Ismail Haji; Albarwry, Amal Jamil Sadiq; Ali, Ardwan Fathi

doi:10.1016/j.crgsc.2022.100312

Cited by 32 publications

(5 citation statements)

References 83 publications

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“…Therefore, the formation of AgNPs@AG can be attributed to the poly-and monosaccharides molecules, which are considered active chelating compounds because they possess multiple hydroxyl groups located at carbon atoms of the flavone rings (Scheme 1). This hypothesis has been confirmed by several published reports on reducing various metal ions, such as Cu 2+ , Se 2+ , Ti 4+ Fe 3+ , and Zn 2+ , using plant extracts [22].…”

Section: Fabrication Of Agnps@agsupporting

confidence: 69%

Rapid Detection of Mercury Ions Using Sustainable Natural Gum-Based Silver Nanoparticles

et al. 2022

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Fabrication of metal nanostructures using natural products has attracted scientists and researchers due to its renewable and environmentally benign availability. This work has prepared an eco-friendly, low-cost, and rapid colorimetric sensor of silver nanoparticles using tree gum as a reducing and stabilizing agent. Several characterization techniques have been exploited to describe the synthesized nanosensor morphology and optical properties. Ultraviolet−Visible (UV−Vis) spectroscopy has been used for monitoring the localized plasmon surface area. High-resolution transmission electron microscopy (HR-TEM) illustrated the size and shape of silver nanoparticles. X-ray diffraction spectra showed the crystallography and purity of the product. Silver nanoparticles decorated with almond gum molecules (AgNPs@AG) demonstrated high sensitivity and colorimetric detection of mercury ions in water samples. The method is based on the aggregation of AgNPs and the disappearing yellow color of AgNPs via a spectrophotometer. The detection limit of this method was reported to be 0.5 mg/L. This work aimed to synthesize a rapid, easy-preparation, eco-friendly, and efficient naked-eye colorimetric sensor to detect toxic pollutants in aqueous samples.

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Section: Fabrication Of Agnps@agsupporting

confidence: 69%

Rapid Detection of Mercury Ions Using Sustainable Natural Gum-Based Silver Nanoparticles

et al. 2022

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“…According to Aymn Yaseen Sharaf Zeebaree et al, the above-mentioned phytochemicals contain many hydroxyl (OH) groups in their molecular structure, facilitating the redox process. These phytochemicals contribute to metal reduction by donating an efficient number of electrons 82 . Another study showed that the water hyacinth contains many phenolics and flavonoids and the hydroxyl groups of flavonoids (quercetin) facilitate silver ions into nano size by reducing.…”

Section: Resultsmentioning

confidence: 99%

Recycling of silver nanoparticles from electronic waste via green synthesis and application of AgNPs-chitosan based nanocomposite on textile material

Mondal,

Paul,

Rhaman

2023

Sci Rep

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The main thrust of this project is the fabrication of silver nanoparticles (AgNPs) from electronic waste (PCB board) and applying it on 100% cotton fabric as an antimicrobial agent. The nanoparticle formation of silver was done by green synthesis way using an aqueous leaf extract of Eichhornia crassipes. Furthermore, chitosan was also applied to the fabric with silver nanoparticles by coating. FTIR and SEM tests characterized the fabricated silver nanoparticles, and antimicrobial tests were followed by the disc diffusion method. The SEM analysis showed an average particle size of 76.91 nm. The FTIR analysis showed the successful reduction of silver nanoparticles and the bonding with chitosan and cellulose. Besides, the EDX reports confirmed the existence of AgNPs by indicating a strong signal in the silver region. In addition, SEM characteristics analysis confirmed the uniform deposition of silver nanoparticles. Finally, the antimicrobial property was tested against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria. The antimicrobial result was found satisfactory in the case of green-synthesized recycled AgNPs. However, the effectiveness was not observed to be higher than green-synthesized pure AgNPs. In this study, the zone of inhibition of AgNPs was also compared to the reference antibiotics Ciprofloxacin.

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“…As a matter of fact, before releasing MB-polluted wastewater into freshwater environments, this poisonous dye should be removed. 4 Contamination from water can be reduced using the energy of light via a process called photocatalysis. A photocatalyst is a substance that can absorb light energy and utilize it to stimulate chemical reactions which is the main part of this process.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the existence of MB has evolved into a massive issue for plants, causing growth inhibition, pigment minimization, and a reduction in the microalgae protein content. As a matter of fact, before releasing MB-polluted wastewater into freshwater environments, this poisonous dye should be removed …”

Section: Introductionmentioning

confidence: 99%

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Enhancing the Photocatalytic Degradation of Methylene Blue with Graphene Oxide-Encapsulated g-C₃N₄/ZnO Ternary Composites

Shakoor,

Jilani

et al. 2024

ACS Omega

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Methylene blue (MB) is a toxic contaminant present in wastewater. Here, we prepared various composites of graphene oxide (GO) with graphitic carbon nitride (g-C 3 N 4 ) and zinc oxide (ZnO) for the degradation of MB. In comparison to ZnO (22.9%) and g-C 3 N 4 /ZnO (76.0%), the ternary composites of GO/g-C 3 N 4 / ZnO showed 90% photocatalytic degradation of MB under a light source after 60 min. The experimental setup and parameters were varied to examine the process and effectiveness of MB degradation. Based on the results of the experiments, a proposed photocatalytic degradation process that explains the roles of GO, ZnO, and g-C 3 N 4 in improving the photocatalytic efficacy of newly prepared GO/g-C 3 N 4 /ZnO was explored. Notably, the g-C 3 N 4 /ZnO nanocomposite's surface was uniformly covered with ZnO nanorods. The images of the samples clearly demonstrated the porous nature of GO/g-C 3 N 4 /ZnO photocatalysts, and even after being mixed with GO, the g-C 3 N 4 /ZnO composite retained the layered structure of the original material. The catalyst's porous structure plausibly enhanced the degradation of the contaminants. The high-clarity production of g-C 3 N 4 and the effectiveness of the synthesis protocol were later validated by the absence of any trace contamination in the energy-dispersive X-ray spectroscopy (EDS) results. The composition of the ZnO elements and their spectra were revealed by the EDS results of the prepared ZnO nanorods, g-C 3 N 4 /ZnO, and GO/g-C 3 N 4/ ZnO. The outcomes indicated that the nanocomposites were highly uncontaminated and contained all necessary elements to facilitate the transformative process. The results of this experiment could be applied at a large scale, thus proving the effectiveness of photocatalysts for the removal of dyes.

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Sustainable engineering of plant-synthesized TiO2 nanocatalysts: Diagnosis, properties and their photocatalytic performance in removing of methylene blue dye from effluent. A review

Cited by 32 publications

References 83 publications

Rapid Detection of Mercury Ions Using Sustainable Natural Gum-Based Silver Nanoparticles

Rapid Detection of Mercury Ions Using Sustainable Natural Gum-Based Silver Nanoparticles

Recycling of silver nanoparticles from electronic waste via green synthesis and application of AgNPs-chitosan based nanocomposite on textile material

Enhancing the Photocatalytic Degradation of Methylene Blue with Graphene Oxide-Encapsulated g-C₃N₄/ZnO Ternary Composites

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Sustainable engineering of plant-synthesized TiO2 nanocatalysts: Diagnosis, properties and their photocatalytic performance in removing of methylene blue dye from effluent. A review

Cited by 32 publications

References 83 publications

Rapid Detection of Mercury Ions Using Sustainable Natural Gum-Based Silver Nanoparticles

Rapid Detection of Mercury Ions Using Sustainable Natural Gum-Based Silver Nanoparticles

Recycling of silver nanoparticles from electronic waste via green synthesis and application of AgNPs-chitosan based nanocomposite on textile material

Enhancing the Photocatalytic Degradation of Methylene Blue with Graphene Oxide-Encapsulated g-C3N4/ZnO Ternary Composites

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Enhancing the Photocatalytic Degradation of Methylene Blue with Graphene Oxide-Encapsulated g-C₃N₄/ZnO Ternary Composites