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Environmentally Benign Nanoparticles for the Photocatalytic Degradation of Pharmaceutical Drugs. Catalysts 2023. [DOI: 10.3390/catal13030511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023] Open
Abstract
A rapid rise in industrialization has led to the release of pharmaceutical pollutants into water bodies, rendering water inappropriate for consumption by humans and animals, challenging our efforts to achieve the clean water sustainable development goal. These pharmaceutical pollutants include antibiotics, anticancer drugs, antidepressants, etc., which are highly stable and persistent in water, in addition to being harmful to life. At times, the secondary pollutant that is formed after degradation is more potent than the parent drug. Conventional water purification methods cannot completely remove these pollutants. Hence, efficient and robust methods are required to degrade pharmaceutical waste. Photocatalytic degradation of drugs is deemed an efficient and effective method for environmental remediation, along with recovery of photocatalysts, which are important for recycling and sustainable use. Herein, we present the synthesis of nanoparticles (NPs) and their application for photocatalytic degradation of pharmaceutical waste as a preferred water treatment method. Additionally, green synthesis of photocatalytic nanomaterials offers the benefit of avoiding secondary pollution. The green synthesis of NPs is employed by using plant extracts that offer a number of metabolites as reducing agents or capping agents, as well as the use of microbes as green nanofactories to tackle the issue of water cleanliness with respect to pharmaceutical waste. Despite regulations concerning drug disposal, some underdeveloped countries do not enforce and practice these guidelines in letter and spirit. Hence, the current work presenting a promising water cleanliness method is expected to contribute to the assurance of strict policy compliance and enforcement, resulting in the resolution of the health concerns with respect to hazardous pharmaceutical waste disposal in water bodies.
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The physical and optical investigations of the tannic acid functionalised Cu-based oxide nanostructures. Sci Rep 2022; 12:9909. [PMID: 35701519 PMCID: PMC9198045 DOI: 10.1038/s41598-022-14281-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 06/03/2022] [Indexed: 11/08/2022] Open
Abstract
The need for a mild, low-cost, green environment that is able to produce exotic properties of output nanostructures is appealing nowadays. Employing these requirements, the copper (Cu)-based oxide nanostructures have been successfully synthesised via one-pot reaction using biocompatible natural polyphenol, tannic acid (TA) as both the reducing agent and stabiliser at 60, 70 and 80 °C. The structural and optical studies disclosed the effect of TA on the surface morphology, phase purity, elemental composition, optical microstrain and optical intrinsic energy of this mixed Cu2O and CuO nanostructures. The optically based method describes the comparative details of the multi-band gap in the presence of more than one element with overlapping spectra from the first-derivative absorbance curve [Formula: see text] and the exponential absorbance of Urbach tail energy [Formula: see text] towards the conventional Tauc bandgap. The [Formula: see text] demonstrates that the pronounced effect of TA that Cu2O and CuO nanostructures creates much sensitive first-derivative bandgap output compared to the Tauc bandgap. The results also show that the [Formula: see text] reduced as the temperature reaches 70 °C and then experienced sudden increase at 80 °C. The change in the pattern is parallel to the trend observed in the Williamson-Hall microstrain and is evident from the variations of the mean crystallite size [Formula: see text] which is also a cause response to the change in temperature or pH. Therefore, the current work has elucidated that the structural and optical correlations on the as-synthesised Cu2O and CuO nanostructures in the presence of TA were the combined reaction of pH change and the ligand complexation reactions. The acquired results suggest a more comprehensive range of studies to further understand the extent relationship between the physical and optical properties of TA functionalised Cu-based oxide nanostructures.
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Anna KK, Bogireddy NKR, Ramírez-Bon R. Synthesis of cetyl trimethyl ammonium bromide (CTAB) capped copper oxide nanocubes for the remediation of organic pollutants using photocatalysis and catalysis. NANOTECHNOLOGY 2021; 32:105707. [PMID: 33227723 DOI: 10.1088/1361-6528/abccee] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The aim of this report is to synthesize copper oxide nanocubes (CuO NCs) at room temperature, using sodium borohydride as a reducing agent, and Cetyl Trimethyl Ammonium Bromide (CTAB) as a stabilizing agent. The crystallinity and morphology of the synthesized CuO NCs are investigated via X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscope (TEM). The optical properties were analyzed by means of UV-visible absorbance and Raman spectroscopy. The existence of specific functional groups and structural stability were established via FTIR spectroscopy and thermogravimetric analysis (TGA). Furthermore, the catalytic efficiency of the as-prepared CuO NCs was tested using catalytic and photocatalytic studies of para-nitrophenol (p-NP) reduction and methylene blue (MB) degradation, respectively. The catalytic results demonstrated the nanocubes' excellent catalytic and photocatalytic responses with respect to the abatement of p-NP and MB within 50 s and 240 min, with kinetic rate constants of 3.9 × 10-2 s-1 and 6.47 × 10-3 min-1, respectively.
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Affiliation(s)
- Kiran Kumar Anna
- Centro de Investigación y de Estudios Avanzados del IPN, Unidad Querétaro, Apdo. Postal 1-798, 76001, Querétaro, Qro., Mexico
| | - Naveen Kumar Reddy Bogireddy
- Centro de Investigación en Ingeniería y Ciencias Aplicadas, UAEM, Av. Univ. 1001, Col. Chamilpa, Cuernavaca, Morelos, 62209, Mexico
| | - Rafael Ramírez-Bon
- Centro de Investigación y de Estudios Avanzados del IPN, Unidad Querétaro, Apdo. Postal 1-798, 76001, Querétaro, Qro., Mexico
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Javed R, Rais F, Kaleem M, Jamil B, Ahmad MA, Yu T, Qureshi SW, Ao Q. Chitosan capping of CuO nanoparticles: Facile chemical preparation, biological analysis, and applications in dentistry. Int J Biol Macromol 2020; 167:1452-1467. [PMID: 33212106 DOI: 10.1016/j.ijbiomac.2020.11.099] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 11/13/2020] [Accepted: 11/13/2020] [Indexed: 12/16/2022]
Abstract
This investigation is vital contribution to the healthcare system utilizing techniques of nanobiotechnology. It interestingly applies chitosan capped CuO nanoparticles in the field of medicine and restorative dentistry. The CuO nanoparticles and CuO-Chitosan nanoparticles are prepared by co-precipitation, and their characterization is performed using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive X-ray (EDX). The average crystallite size of these nanoparticles has been found to be in the dimensions of <40 nm and <35 nm, respectively. CuO-Chitosan nanoparticles show significant enhancement in in vitro antibacterial, antioxidant, cytotoxic, and antidiabetic activity as compared to CuO nanoparticles. In addition, the successful amalgamation of CuO nanoparticles and CuO-Chitosan nanoparticles into dentine bonding agents results in providing efficient remedy against secondary caries. CuO-Chitosan nanoparticles reinforced dental adhesive discs cause significant upsurge in reduction of Lactobacillus acidophillus and Streptococcus mutans. Also, the augmentation of mechanical properties, water sorption and solubility plus slow and sustained release profile and slight variation of shear bond strength is attained. Taken together, the chemically synthesized CuO nanoparticles and CuO-Chitosan nanoparticles have proven to be promising candidates having enormous potential to be utilized in drug delivery and nanotheranostics.
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Affiliation(s)
- Rabia Javed
- Department of Tissue Engineering, China Medical University, Shenyang 110122, China; Department of Biological Sciences, National University of Medical Sciences, Rawalpindi 46000, Pakistan.
| | - Farwa Rais
- Department of Dental Materials, Army Medical College, National University of Medical Sciences, Rawalpindi 46000, Pakistan
| | - Muhammad Kaleem
- Department of Dental Materials, Army Medical College, National University of Medical Sciences, Rawalpindi 46000, Pakistan
| | - Bushra Jamil
- Department of Medical Lab Sciences, University of Lahore, Islamabad 44000, Pakistan
| | - Muhammad Arslan Ahmad
- Department of Tissue Engineering, China Medical University, Shenyang 110122, China; Key Lab of Eco-restoration of Regional Contaminated Environment (Shenyang University), Ministry of Education, Shenyang 110044, China
| | - Tianhao Yu
- Department of Tissue Engineering, China Medical University, Shenyang 110122, China; Liaoning Provincial Key Laboratory of Oral Diseases, Department of Cadres Clinic, School and Hospital of Stomatology, China Medical University, Shenyang 110122, China
| | - Saba Waqar Qureshi
- Department of Dental Materials, Army Medical College, National University of Medical Sciences, Rawalpindi 46000, Pakistan
| | - Qiang Ao
- Department of Tissue Engineering, China Medical University, Shenyang 110122, China; Institute of Regulatory Science for Medical Device, National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
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Ismail RA, Rawdhan HA, Ahmed DS. High-responsivity hybrid α-Ag 2S/Si photodetector prepared by pulsed laser ablation in liquid. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2020; 11:1596-1607. [PMID: 33134004 PMCID: PMC7590626 DOI: 10.3762/bjnano.11.142] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Accepted: 09/25/2020] [Indexed: 05/05/2023]
Abstract
We report the synthesis of α-Ag2S nanoparticles (NPs) by one-step laser ablation of a silver target in aqueous solution of thiourea (Tu, CH4N2S) mixed with cationic cetyltrimethylammonium bromide (CTAB) as surfactant. The effect of the CTAB surfactant on the structural, morphological, optical, and elemental composition of Ag2S NPs was evaluated using X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and UV-vis spectroscopy. The optical absorption decreased and the optical energy gap of α-Ag2S increased from 1.5 to 2 eV after the CTAB surfactant was added to the Tu solution. XRD studies revealed that the synthesized Ag2S NPs were polycrystalline with a monoclinic structure and that crystallinity of the nanoparticles was improved after adding CTAB. Raman studies revealed the presence of peaks related to Ag-S bonds (Ag modes) and the longitudinal optical phonon 2LO mode. Scanning electron microscopy investigations confirmed the production of monodisperse Ag2S NPs when using the CTAB surfactant. The optoelectronic properties of α-Ag2S/p-Si photodetector, such as current-voltage characteristics and responsivity in the dark and under illumination, were also improved after using the CTAB surfactant. The responsivity of the photodetector increases from 0.64 to 1.85 A/W at 510 nm after adding CTAB. The energy band diagram of the α-Ag2S/p-Si photodetector under illumination was constructed. The fabricated photodetectors exhibited reasonable stability after three weeks of storage under ambient conditions with a responsivity of 70% of the initial value.
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Affiliation(s)
- Raid A Ismail
- Department of Applied Science, University of Technology, Baghdad, Iraq
| | - Hanan A Rawdhan
- Department of Applied Science, University of Technology, Baghdad, Iraq
| | - Duha S Ahmed
- Department of Applied Science, University of Technology, Baghdad, Iraq
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Alhumaimess MS, Essawy AA, Kamel MM, Alsohaimi IH, Hassan HMA. Biogenic-Mediated Synthesis of Mesoporous Cu 2O/CuO Nano-Architectures of Superior Catalytic Reductive towards Nitroaromatics. NANOMATERIALS 2020; 10:nano10040781. [PMID: 32325786 PMCID: PMC7221583 DOI: 10.3390/nano10040781] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 04/15/2020] [Accepted: 04/16/2020] [Indexed: 11/25/2022]
Abstract
Cu2O/CuO nano-architectures were prepared by biogenic-mediated synthesis using pomegranate seeds extract as the reducing/stabilizing mediator during an aqueous solution combustion process of the Cu2+ precursor. The fabricated Cu2O/CuO nanocomposite were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM) and nitrogen sorption. Nitrobenzene (NB) was applied a probe to test the catalytic activities of the fabricated Cu2O/CuO nanocomposite. The results indicated that pomegranate seeds extract (PSE) manifest Cu2O/CuO NPs of tiny particle size, larger pore volume and greater surface area compared to the bulky CuO synthesized in the absence of PSE. The surface area and total pore volume of Cu2O/CuO NPs were 20.1 m2 g−1 and 0.0362 cm3 g−1, respectively. The FESEM image shows the formation of broccoli-like architecture. The fabricated Cu2O/CuO nanocomposite possesses surprising activity towards the reduction of nitro compounds in the presence of NaBH4 into amino compounds with high conversion (94%). The reduction process was performed in water as a green solvent. Over four consecutive cycles the resulting nanocomposite also exhibits outstanding stability. In addition, the resulting Cu2O/CuO nanocomposite suggested herein may encourage scientists to start preparing more cost-effective catalysts for marketing instead of complicated catalysts.
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Affiliation(s)
- Mosaed S. Alhumaimess
- Chemistry Department, College of Science, Jouf University, P.O. Box 2014, Sakaka 42421, Saudi Arabia; (A.A.E.); (M.M.K.); (H.M.A.H.)
- Correspondence: (M.S.A.); (I.H.A.)
| | - Amr A. Essawy
- Chemistry Department, College of Science, Jouf University, P.O. Box 2014, Sakaka 42421, Saudi Arabia; (A.A.E.); (M.M.K.); (H.M.A.H.)
- Chemistry Department, Faculty of Science, Fayoum University, Fayoum 63514, Egypt
| | - Mahmoud M. Kamel
- Chemistry Department, College of Science, Jouf University, P.O. Box 2014, Sakaka 42421, Saudi Arabia; (A.A.E.); (M.M.K.); (H.M.A.H.)
| | - Ibrahim Hotan Alsohaimi
- Chemistry Department, College of Science, Jouf University, P.O. Box 2014, Sakaka 42421, Saudi Arabia; (A.A.E.); (M.M.K.); (H.M.A.H.)
- Correspondence: (M.S.A.); (I.H.A.)
| | - Hassan M. A. Hassan
- Chemistry Department, College of Science, Jouf University, P.O. Box 2014, Sakaka 42421, Saudi Arabia; (A.A.E.); (M.M.K.); (H.M.A.H.)
- Department of Chemistry, Faculty of Science, Suez University, Suez 43511, Egypt
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Moorthy A, Bellarmin VR, Kumaran B, Saravanan MER. CTAB assisted sol-gel synthesis and characterization of FeWO4 and CoWO4 nanoparticles. INORG NANO-MET CHEM 2020. [DOI: 10.1080/24701556.2020.1732415] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Arjun Moorthy
- Department of Chemical Engineering and Materials Science, Amrita School of Engineering, Coimbatore, Tamil Nadu, India
| | | | - Balaji Kumaran
- Department of Chemical Engineering and Materials Science, Amrita School of Engineering, Coimbatore, Tamil Nadu, India
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