Iranian Environmental Mutagen SocietyJournal of Water and Environmental Nanotechnology2476-72047420221201Synthesis and characterization of Sn-doped TiO2 nanoparticles and the evaluation of their Photocatalytic performance under Vis-lights34435070083510.22090/jwent.2022.04.001ENHassanali RasouliFaculty of Engineering, University of Mohaghegh Ardabili, Ardabil, IranFaezeh JafarpishehChemical Engineering Department, University of Tabriz, Tabriz, IranMohammad GhorbanpourChemical Engineering Department, University of Tabriz, Tabriz, IranJournal Article20220716Dyes are produced as water pollutants in the textile, plastic, and dye industries. Many efforts have been made to remove dyes from industrial wastewater. In this area, Photocatalytic performance under Vis-lights is a useful and effective method. In this study, a series of highly efficient Sn-doped TiO2 photocatalysts were successfully developed using a simple heat treatment process. Three concentrations of SnCl2 powder (3%, 5%, and 7 %) were used for the preparation of materials. The characterizations of resulting materials were distinguished by scanning electron microscopy (SEM), diffusion reflection spectroscopy (DRS), and X-ray diffraction spectroscopy (EDX). Also, methyl orange dye was served to indicate the photocatalytic activity of Sn-doped material under visible light irradiation. The results indicated that both doped and also pure TiO2 have a uniform size. Anatase was the only identified phase in all the products, whether doped or un-doped. The resulting Sn-doped materials have demonstrated a band gap value range of 3.14 to 2.68 eV in comparison with pure TiO2 which shows a value of 3.2 eV. The photocatalytic evaluations indicated that the samples prepared in the presence of 3, 5, and 7% SnCl2 have degradation efficiencies of 85%, 85%, and 90%, respectively within 120 min, which are much higher than that of un-doped TiO2. The enhancement in the efficiency was attributed to the gap changes in anatase by the incorporation of Sn ions into the TiO2 lattice structure. Compared to pure TiO2, which has a band gap of 3.2 eV, the band gap values for doped TiO2 ranged from 3.14 to 2.68 eV. https://www.jwent.net/article_700835_ff4b4b8da471a149bceecea0496d91e3.pdfIranian Environmental Mutagen SocietyJournal of Water and Environmental Nanotechnology2476-72047420221201The influence of Cu doped ZrO2 catalyst for the modification of the rate of a photoreaction and forming microorganism resistance35136270084210.22090/jwent.2022.04.002ENJeba RResearch Scholar, Reg.No:18223282132002, Women’s Christian College, Tamilnadu, India-629001Affiliated to Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli, India- 6270120000-0002-5156-0628Radhika SDepartment of Physics, Pioneer Kumaraswamy College, Tamilnadu, India- 629003ffiliated to Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli, India- 627012Padma C MDepartment of Physics, Women’s Christian College, Tamilnadu, India-629001Affiliated to Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli, India- 627012Ascar Davix XDepartment of Electronics and Communication Engineering, R.V.R. & J.C. College of Engineering, Andhra,Pradesh, India - 5220190000-0002-6795-7865Journal Article20220718Pure and copper-doped Zirconium oxide nanoparticles were synthesized using a co-precipitation process and investigated the effect of doping on photocatalytic and anti-microbial activities. The prepared samples are pure tetragonal phase, as shown by the X-ray diffraction pattern, and the crystallite size decreases as the dopant concentration increases. Higher dopant concentrations resulted in needle-shaped morphology, as seen in the SEM image. The presence of Zr, Cu, and O in the sample is confirmed by EDS analysis. According to UV-VIS analysis, when the Cu content is increased, a more significant wavelength absorption band edge is formed, and the band gap reduces with the increase in dopant concentration. All samples have magnetic hysteresis loops with diamagnetic background effects, according to VSM tests. A prominent and influential peak at 485nm in the PL spectra suggests that ZrO2 nanoparticles emit blue light. The produced nanoparticles were utilized as a photocatalyst to degrade Methylene Blue (MB) dye, and the results indicate that a high dopant concentration (0.08wt percent) outperforms pure and other dopant concentrations. Copper-doped ZrO2 has moderate anti-bacterial and anti-fungal activities.https://www.jwent.net/article_700842_521b86673bb9410b1afca3023cf24b0f.pdfIranian Environmental Mutagen SocietyJournal of Water and Environmental Nanotechnology2476-72047420221201Green Synthesis of Silver Nanoparticles using Litsea glutinosa L. Leaves and Stem Extracts and their Antibacterial Efficacy36336970084310.22090/jwent.2022.04.003ENP. Koteswara RaoDepartment of Biochemistry, Andhra University, Visakhapatnam-530003, IndiaB Vikram BabuDepartment of Physics, International School of Technology and Sciences (ISTS) for Women, Rajanagaram, Rajamahendravaram, Andhra Pradesh 533294, India. Aditya Engineering College (A), Kakinada, 533005, IndiaA. Rama KrishnaDepartment of ECE, Aditya College of Engineering and Technology, Surampalem, IndiaM. Sushma ReddiDepartment of Physics, Dr. B. R. Ambedkar University, Srikakulam- 532410, IndiaB. Sathish MohanBio Enviro Chemical Solutions, Visakhapatnam-530017, India0000-0003-2852-9187K. Anjani DeviDepartment of Physics, Aditya College of Engineering and Technology, Surampalem, IndiaU. SusmithaQuiver Biotech Pvt Ltd., Mallapur, Hyderabad-500070, IndiaT. Raghava RaoDepartment of Biochemistry, Andhra University, Visakhapatnam-530003, IndiaJournal Article20220802The present study explores the green approach for the preparation of silver nanoparticles (AgNPs) through the reduction of silver nitrate by the cell-free stem and leaf aqueous extracts of Litsea glutinosa (L.glutinosa) and its potential antibacterial activity. The analytical instruments include scanning electron microscopy, Fourier transforms infrared spectroscopy, UV-visible spectroscopy, and X-ray diffraction spectroscopy confirmed the synthesis of smaller, uniformly spherical AgNPs (10-40 nm). The average crystalline size of prepared AgNPs produced by L. glutinosa leaf extract was found to be 19 mm. From UV-visible spectral analysis, the maximum absorbance peak appeared at 444 nm for leaf extract AgNPs different from stem extract AgNPs (422 nm), which are found to be specific for AgNPs. The L.glutinosa stem extract-assisted AgNPs have shown significant antibacterial activity against Bacillus subtilis (Gram-positive) and Escherichia coli (Gram-negative) in comparison to Gentamycin. Hence, the AgNPs obtained by green synthesis can be therapeutically explored against bacterial infections.https://www.jwent.net/article_700843_02f9e380db34427d275971d41de681bc.pdfIranian Environmental Mutagen SocietyJournal of Water and Environmental Nanotechnology2476-72047420221201Selective determination of mercury (II) in coastal water using bio- functionalized gold nanoparticles37037970084410.22090/jwent.2022.561201.1555ENKanchanmala DeshpandeSchool of Chemical Sciences, Goa University, Goa, India, 403206Anju ThekkedathSchool of Chemical Sciences, Goa University, Goa, India, 403206Journal Article20220901The key to simple and rapid detection of a large volume of samples lies in the hands of solution-based nanomaterial sensors. Quantification of mercury in the river and coastal water is analytically challenging due to the potential interference of the matrix. In this endeavor, lysine-capped gold nanoparticles (Lys-AuNPs) based colorimetric sensors are demonstrated here towards efficient detection of trace amounts of mercury ions (Hg2+) in coastal and estuarine water. The colorimetric behavior of Lys-AuNPs is related to surface plasmon resonance (SPR)<br />During analysis, interestingly a decrease in the intensity of the original SPR peak at 530 nm was observed, with the concomitant appearance of a new peak at a longer wavelength due to agglomerated Lys- AuNPs. Developed sensors exhibit excellent performance in different environmental samples with high selectivity towards Hg2+ ions in the presence of other metal ions. For the analysis of coastal water samples, a low value of regression coefficient was observed due to the potential interference of salt in the sample. To overcome this, matrix-matching experiments were carried out. Developed Lys- AuNPs show good selectivity towards Hg2+ in matrixed matched diluted coastal water samples. With a sensitivity of 0.02 ppm, the sensor can be utilized to screen large numbers of coastal water samples for their Hg2+ content to satisfy coastal regulation norms. As a whole, this method is simple, sensitive, selective, cost-effective and can be used to screen large numbers of samples across the coastal area for monitoring Hg2+ concentration.https://www.jwent.net/article_700844_3c4d02797464364f39d78ea4e8e1f220.pdfIranian Environmental Mutagen SocietyJournal of Water and Environmental Nanotechnology2476-72047420221201Melissa officinalis extraction with nanoencapsulation By chitosan as an ecofriendly compound38038870084510.22090/jwent.2022.04.005ENLeila ArdestaniFaculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, IranMorteza HosseiniFaculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, IranMohsen JahanshahiNanotechnology Research Institute, Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, IranAlireza AmiriNanotechnology Research Institute, Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, IranJournal Article20220731The bioactive compounds in extracts are prone to degradation by oxidation, heat, or light. Nanoencapsulation is one of the best techniques to keep the properties of these chemical compounds. The aim of this study was the extraction of Melissa officinalis (MO) and nanoencapsulation of the extract via chitosan as a biodegradable polymer. In this research, extraction of MO was investigated using various extraction methods and nanoencapsulation with MO extract was carried out via ionic gelation technique. The effectiveness of the extracts was evaluated by measuring the total phenolic content (TPC), antioxidant activity, and extraction efficiency of the solid contents. The highest efficiency was achieved for microwave-assisted extraction with the utmost values in each parameter. (TSC) was 22.81% and amounts of the TPC and antioxidant activity were 311.94 mg Gallic acid and 36 mg diphenyl picryl hydrazyl (DPPH) per 1g of the plant, respectively. Morphology study by field emission scanning electron microscopy (FE-SEM) indicated spherical shape nanoparticles with a diameter of 25nm. The size of the nanoparticles was evaluated by the Dynamic Light Scattering (DLS) technique for various concentrations of the used extracts in the encapsulation process. For 1.0, 3.0, and 5.0 mg /mL concentration, mean diameters were 24, 118, and 145 nm, respectively. Results indicated that microwave-assisted extraction was the best extraction method for MO and the encapsulation of MO extract could be created successfully with different particle sizes for the protection of bioactive compounds. Since MO is a beneficial herbal plant, the development of this research is recommended.https://www.jwent.net/article_700845_411717bad54feeb65e50df8983ba0de4.pdfIranian Environmental Mutagen SocietyJournal of Water and Environmental Nanotechnology2476-72047420221201Antimicrobial and Environmental Applications of Inorganic Nanoparticles Synthesised from Plants38940670084610.22090/jwent.2022.04.006ENK SahithyaDepartment of Microbiology, Indian Academy Degree College-Autonomous, Bengaluru-560043, Karnataka, India0000-0001-6173-505XT MouliDepartment of Microbiology, Indian Academy Degree College-Autonomous, Bengaluru-560043, Karnataka, IndiaPR DevikaDepartment of Microbiology, Indian Academy Degree College-Autonomous, Bengaluru-560043, Karnataka, IndiaCK HarshithaDepartment of Microbiology, Indian Academy Degree College-Autonomous, Bengaluru-560043, Karnataka, IndiaJournal Article20220731Nanoscale materials are widely used in many fields including medicine, engineering, and the environment that focuses on the synthesis of nano dimensional particles is a timely topic. Nanomaterials synthesized by chemical approaches have intended effects on the environment and human health. In response to these challenges, plant-mediated synthesis of inorganic nanoparticles has been a highly innovative research area over the last decade. Aqueous and solvent extracts have been employed as efficient resources in synthesis-controlled nanostructures and the fabrication of various nanomaterials. The present article unveils the possible role of plant biomolecules including amino acids, aldehydes, terpenoids, ketones, tannins, and phenolics in the reduction and stabilization of various metal and metal oxide nanoparticles. The green synthesized nanoparticles evolved as efficient alternative agents in solving the serious threats faced in the field of biomedical, energy conversion, environment, automobiles, electronics, and optical. Moreover, catalytic, and antimicrobial applications of green nanoparticles are also critically discussed.https://www.jwent.net/article_700846_f59a6d9122009f46f43a9f5387202246.pdfIranian Environmental Mutagen SocietyJournal of Water and Environmental Nanotechnology2476-72047420221201Scrutinizing The Applications Of Mangrove Actinomycetes Mediated Biosynthesized Copper Nanoparticles40742770084710.22090/jwent.2022.04.007ENRavindra AshokSharmaDepartment of Microbiology, Ramchand Kimatram Talreja College, Ulhasnagar- 421003, Maharashtra, India0000-0002-2446-733XPrajakta KashinathJagtapDepartment of Basic and Applied Science, National Institute of Food Technology Entrepreneurship and Management, Sonipat-131028, Haryana, IndiaJournal Article20220908Recently, there has been an increase in research interest in metal nanoparticles and their synthesis because of their various applications in different industrial areas. The current study deals with the Actinomycetes-mediated synthesis of copper nanoparticles (CuNPs) isolated from mangrove soil and to further access its application in different fields. Eight different soil samples were collected from three different mangrove sites located in Mumbai. A total of 15 different Actinomycetes isolates were obtained from soil samples and studied in the present investigation and were screened for metal tolerance. It was found that out of 15 isolates, only 3 were able to tolerate the highest metal salt concentration i.e. 10-1M. The synthesized CuNPs were further investigated with various characterizations such as UV-Vis spectroscopy, FTIR, and XRD. The identification of isolate GRC1 was done as per Bergey’s Manual of Systematic Bacteriology Volume 5 for preliminary identification of Actinomycetes and was identified as Streptomyces sp. This isolate was further characterized by Vitek MS and it was identified as Streptomyces verticillus. The inhibition zone by biosynthesized CuNPs was significantly greater when compared with standard antibiotics and CuSO4. The calculated degradation efficiency after 5hrs of incubation was 59.67% and 96.26% for Red M8B and Reactive green, respectively. Prevention of biofilm formation by CuNPs was confirmed by microscopic technique and significant inhibition of biofilm was observed. Thus, the mangrove Actinomycetes mediated bio-fabrication of CuNPs should gain much attention because of their unique properties like antimicrobial, anticancer, catalytic activity, wound healing, and antifouling.https://www.jwent.net/article_700847_1e7d5f082e316ca6dcc224532a401bdf.pdfIranian Environmental Mutagen SocietyJournal of Water and Environmental Nanotechnology2476-72047420221201Hard water treatment with synthesized carbon nanoparticles of Phyllanthus emblica42843770084810.22090/jwent.2022.04.008ENLatha VatchalanDepartment of Chemistry, Sri. S.Ramasamy Naidu Memorial College, Sattur, India0000-0002-3712-4184Journal Article20220918Water is, indisputably, the most vital component of life on earth. Water is a life elixir and its hardness is defined by the high concentration of magnesium, calcium, lead, chromium, iron, and mercury. The hardness of water limits its domestic and industrial usage severely. Therefore it is essential to suggest a simple, low-cost, and robust method for hard water treatment by evaluating the results in terms of Physicochemical parameters. In this paper, an efficient approach for hard water treatment by using synthesized carbon nanoparticles (C NPs) of Phyllanthus Emblica wood barks. The water samples are collected from the towns and villages located in Virudhunagar and Tuticorin District. For hardness treatment, in this work the physicochemical parameters considered are pH, TDS, dissolved Oxygen, Ca, Mg, Chloride, Alkalinity, and hardness levels. The experimental analysis, cleared that the proposed carbon nanoparticles synthesized from Phyllanthus Emblica wood barks are a very efficient and cost-effective solution. https://www.jwent.net/article_700848_8e121214ab06b145f4185b492cb291ce.pdf