ROS-Mediated Aquaculture Wastewater Remediation Using TeO2-Deposited ZnO Nanotubes

Singh, Aishwarya; Nenavathu, Bhavani Prasad; Dasauni, Khushboo; Nailwal, Tapan Kumar

doi:10.1007/s11270-022-05668-9

Cited by 6 publications

(4 citation statements)

References 43 publications

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“…3.1. Characterization of gCN-TZ nanocomposites X-ray diffraction results of the as-synthesized gCN-TZ and pristine ZnO NPs showed 2θ values related to (100), ( 101), (102), (110), ( 103) and (112) planes (figure 2), corresponding to the hexagonal wurtzite phase of ZnO (JCPDS card No: 5-0664) [22]. Herein, broad diffraction peaks at 28.96 °is ascribed to TeO 2 [24,25].The average grain size of 5% TZ is found to be 14 nm and 2% g-CN-TZ showed 35 nm, which are calculated using Image J software.…”

Section: Resultsmentioning

confidence: 99%

“…Certified Chickpea (Cicer arietinum) seeds with an average germination rate of more than 80% were collected from a local market in Meerut, Uttar Pradesh, India. Synthesis was done via a sequential method in which TeO 2 deposited ZnO (TZ) (5 wt %) were synthesized using a previous reported work [22]. Graphitic carbon nitride (gCN) was synthesized using melamine as the precursor, upon it's calcination at 550 °C for 2h.…”

Section: Collectionmentioning

confidence: 99%

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Formulation of dual functional gCN/TeO₂-ZnO nanocomposites as a controlled release nanofertilizer and antibacterial agent

Singh¹,

Dasauni²,

KumarNailwal³

et al. 2023

Nanotechnology

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A simple cost-effective sono-chemical method was used for the synthesis of gCN/TeO2-ZnO ternary (2%, 5%, and 10%) nanocomposites, having crystallite size of 12 nm. FE-SEM and transmission electron microscopy images revealed the formation of core–shell type nanocomposites with an average size of 50 nm. Further, E. coli MTCC 443 strain is used as a model organism to study the antibacterial activity of the prepared nanocomposites, using disc diffusion method. Among all the concentrations, 2% gCN/TeO2-ZnO showed maximum zone of inhibition of 23 ± 0.10 mm and its antibacterial activity is like third-generation antibiotic cefotaxime. In addition, the prepared nanocomposites were used as nanofertilizer for the growth of gram seeds Chickpea (Cicer arietinum). The effect of nanocomposite concentration and its sterilising properties are studied on the rate of germination of Chickpea using both in vitro and in vivo studies (pot study). The root length of the gCN/TeO2-ZnO treated plants showed increase in seed germination (3.30 cm) compared to untreated plants (3.22 cm). In addition, enhancement in the shoot length about 28% is noticed in pot studies, compared to control batch samples. The accumulation of nanomaterial in plant roots was confirmed using SEM-EDX and ICP-MS. Finally, a 14-day experiment was conducted to ascertain the role of gCN/TeO2-ZnO in the controlled release of nutrients from the synthesised nanofertilizer. Owing to its excellent water holding capacity, sterilizing properties, and low toxicity this material can be used as a growth promoter in plants.

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Section: Resultsmentioning

confidence: 99%

Section: Collectionmentioning

confidence: 99%

Formulation of dual functional gCN/TeO₂-ZnO nanocomposites as a controlled release nanofertilizer and antibacterial agent

Singh¹,

Dasauni²,

KumarNailwal³

et al. 2023

Nanotechnology

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“…The composition of organic wastewater is complex, and it comes from many sources and routes such as chemical industry [1] , paper mill industry [2] , pharmaceutical industry [3] , textile industry [4] , aquaculture [5] and other industries. In addition to containing a large amount of organic matter, it also contains metal cations, suspend solids, ammonia nitrogen, etc.…”

Section: Introductionmentioning

confidence: 99%

Waste to Energy-Effects of Complex Components of Organic Wastewater on Coal Water Slurry Stabilizers

Li,

Feng,

Luo

et al. 2024

E3S Web Conf.

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Coal water slurry is an advanced and efficient coal utilization technology, prepare coal water slurry by gasification wastewater can realize the recycling of wastewater and improve the combustion or gasification efficiency of the slurry. Stabilizer is an important component to ensure fluidity and stability in industrial applications of coal water slurry, and the complex substances in wastewater for coal water slurry preparation have a great influence on the stabilizer. Therefore, in this paper, the influence of the major substances in gasification wastewater on the stabilizer is studied. Results show that (a) Ammonia nitrogen substances have adverse effects on stabilizers, because the ionized NH4+ in the solution will bond with the polar groups on the stabilizer, which will affect the stabilizer to lose its effectiveness and reduce the stability of the slurry. (b) Small organic molecules have little effect on stabilizers, this is because the binding strength and quantity of stabilizer to water molecules is much larger than that of organic matters such as phenolic substances. (c) Highvalent metal ions have a greater impact on stabilizers, the metal ions easily form gels or precipitates with the stabilizer, causing it to lose its effectiveness, and also have an electrostatic effect with the carboxyl group on the side chain of the stabilizer, which makes the stabilizer easy to aggregate together and lose the steric hindrance effect, finally cause the stability of the slurry reduced. The conclusion of the influence of substances in wastewater on stabilizer can provide a technical reference for the selection of suitable wastewater and stabilizer to prepare coal water slurry, then promoting the efficient use of energy.

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“…Alalm et al synthesised S-TiO 2 photocatalyst which exhibited 97% degradation in 480 min and the source used was a 400 W metal halide lamp [27]. Singh et al synthesised a TeO 2 -deposited ZnO material, which exhibited photocatalytic degradation of 2,4-DCP with 94% efficiency in 6 h in the presence of natural sunlight [28]. Singh et al synthesised Mg(OH) 2 /CdS nanostructures for the degradation of β-naphthol in the presence of natural sunlight, which shows a degradation efficiency of 75% in 150 min [29].…”

Section: Introductionmentioning

confidence: 99%

Sunlight-mediated removal of endocrine disruptors from wastewater using trimetallic core-shell Ag-TeO₂@ZnO nanocomposites

Joshi,

Patel,

Singh

et al. 2024

Nanotechnology

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The current work emphasizes the preparation of trimetallic core-shell Ag–TeO2@ZnO nanocomposites (NCs) by thermo-mechanical method for the efficient photocatalytic degradation of 2,4-Dichlorophenol and β-naphthol pollutants. FE-SEM shows that Ag and TeO2 nanoparticles are deposited on the surface of ZnO nanotubes. The band gap of pristine ZnO NPs and 5 wt% Ag–TeO2@ZnO nanocomposites are found to be 3.16 and 2.96 eV, respectively. The calculated specific surface area (SBET) of pristine ZnO NPs and 5 wt% Ag–TeO2@ZnO nanocomposites are 40.47 and 45.66 m2 g−1 respectively, confirming that Ag and TeO2 nanoparticles contribute to increasing in surface area of pure ZnO. The synthesised nanocomposite showed excellent photocatalytic performance for the degradation of β -naphthol (95.6%) in 40 min at the concentration of (0.6 mg ml−1) and 2,4-DCP (99.6%) in 180 min (0.4 mg ml−1) under natural sunlight. Cyclic Voltammetry and Electrochemical Impedance Spectroscopy were carried out to study the electrochemical properties. The determination of reactive oxygen species (ROS) confirmed that the degradation of the pollutants by 5 wt% Ag–TeO2@ZnO NCs was due to the formation of superoxide radicals. Electron paramagnetic resonance revealed the presence of sharp signals in pure ZnO nanoparticles at g ∼1.95 and oxygen vacancy peak at g ∼2.01 in 5 wt% Ag–TeO2@ZnO NCs. To study the mechanism behind the degradation of pollutants, Scavenger test using histidine and ascorbic acid (ROS scavengers) was performed. The synthesised nanocomposites are highly stable and showed enhanced efficiency up to three cycles, confirming their reusability as a photocatalyst.

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ROS-Mediated Aquaculture Wastewater Remediation Using TeO2-Deposited ZnO Nanotubes

Cited by 6 publications

References 43 publications

Formulation of dual functional gCN/TeO₂-ZnO nanocomposites as a controlled release nanofertilizer and antibacterial agent

Formulation of dual functional gCN/TeO₂-ZnO nanocomposites as a controlled release nanofertilizer and antibacterial agent

Waste to Energy-Effects of Complex Components of Organic Wastewater on Coal Water Slurry Stabilizers

Sunlight-mediated removal of endocrine disruptors from wastewater using trimetallic core-shell Ag-TeO₂@ZnO nanocomposites

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ROS-Mediated Aquaculture Wastewater Remediation Using TeO2-Deposited ZnO Nanotubes

Cited by 6 publications

References 43 publications

Formulation of dual functional gCN/TeO2-ZnO nanocomposites as a controlled release nanofertilizer and antibacterial agent

Formulation of dual functional gCN/TeO2-ZnO nanocomposites as a controlled release nanofertilizer and antibacterial agent

Waste to Energy-Effects of Complex Components of Organic Wastewater on Coal Water Slurry Stabilizers

Sunlight-mediated removal of endocrine disruptors from wastewater using trimetallic core-shell Ag-TeO2@ZnO nanocomposites

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Formulation of dual functional gCN/TeO₂-ZnO nanocomposites as a controlled release nanofertilizer and antibacterial agent

Formulation of dual functional gCN/TeO₂-ZnO nanocomposites as a controlled release nanofertilizer and antibacterial agent

Sunlight-mediated removal of endocrine disruptors from wastewater using trimetallic core-shell Ag-TeO₂@ZnO nanocomposites