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Nayana K, Sunitha AP. Amphi-Luminescent MoS 2 nanostructure for photocatalytic splitting of water and removal of Methylene Blue. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 314:124190. [PMID: 38554694 DOI: 10.1016/j.saa.2024.124190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 02/24/2024] [Accepted: 03/25/2024] [Indexed: 04/02/2024]
Abstract
Chemical dyes used in the textile industries are one of the major pollutants in water. Methylene blue (MB) is a commonly seen dye that creates hazardous health problems. In this article the photocatalytic degradation of MB by the nanocatalyst MoS2 (Nano-MoS2) and carbon dot (C Dots) incorporated MoS2 (Nano-CD-MoS2) is reported. The photocatalytic degradation of MB is analyzed based on the electron-hole recombination rate of the catalyst. Photoluminescence emission exhibited by the catalyst is used as a key indicator to probe the electron-hole recombination rate. Nano-MoS2 was synthesized hydrothermally at 180 0C for 8 h from ammonium tetra thiomolybdate (ATTM). C Dot was prepared following a green root from ash guard extract which later mixed with Nano-MoS2 and kept in an autoclave at a temperature 140 °C for 4 h to get Nano-CD-MoS2. The photoluminescence (PL) and photocatalytic behavior of Nano-MoS2 and Nano-CD-MoS2 and their application for water splitting and water purification are reported. The incorporation of graphene and artificial C Dot into MoS2 nanostructures are reported to increase the conductivity and active edge sites of MoS2 that enhances the photocatalytic action. Since green C Dots are eco-friendly and easily synthesizable than artificial C Dots, as a novel study, this article investigated the influence of green C Dots on the PL and photocatalytic performance of nanosized MoS2. Nano-MoS2 and Nano-CD-MoS2 exhibited both upconversion and downconversion PL; accordingly the nanostructures were termed as amphi-luminescent. The amphi-luminescence property widens the photon absorption range and hence enhances the catalytic degradation of dyes. Nano-MoS2 which exhibited lesser intensity of amphi-luminescence emission compared to Nano-CD-MoS2 showed better results in degradation of MB. C Dots may bind with the valence band electrons of MoS2, resulting in the reduction of dangling bonds. Dangling bonds can trap photo-induced excitons to hinder the rate of electron-hole recombination. So, fast electron-hole recombination occurs in Nano-CD-MoS2 than Nano-MoS2. Fast electron-hole recombination supports radiative electron-hole recombination while suppresses the non-radiative energy transfer of electrons and causes high PL intensity. However, according to the energy level diagram, Nano-MoS2 with minimal electron-hole recombination rate is more favorable for O2/O2-,.OH/ OH- and.OH/H2O reactions that facilitate MB degradation. Photocatalytic activity of catalysts were confirmed by measuring the photocurrent from a simple custom-made two-electrode water photolysis cell where the nanocatalysts were dispersed in electrolyte. Lead and steel rods were used as electrodes. Multimeter was used to measure current. Nano-MoS2 exhibited better performance with a maximum photocurrent of 141 µA. Influence of green C Dots in energy levels, PL and photocatalysis of MoS2 and mechanisms of PL and degradation of MB are thoroughly investigated in this article.
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Affiliation(s)
- K Nayana
- Department of Physics, Government Victoria College, Affiliated to University of Calicut, Palakkad, Kerala 678001, India; Department of Physics, N. S. S. College, Affiliated to University of Calicut, Ottapalam, Kerala 679103, India
| | - A P Sunitha
- Department of Physics, Government Victoria College, Affiliated to University of Calicut, Palakkad, Kerala 678001, India.
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Dhir R, Shah B, Singh N. Synthesis and characterization of a novel copper carboxylate complex and a copper complex-coated polyether sulfone membrane for efficient degradation of methylene blue dye under UV irradiation: the single crystal X-ray structure of the copper carboxylate complex. Dalton Trans 2024; 53:9441-9451. [PMID: 38766878 DOI: 10.1039/d4dt00871e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Synthesis of a novel binuclear Cu(II) carboxylate complex under ambient laboratory conditions is presented. The complex exhibits a paddle wheel structure in which the axial positions are occupied by two copper atoms instead of two water molecules. The synthesized complex was characterized by single-crystal X-ray crystallography, FT-IR, X-ray diffraction, and UV-visible spectroscopy techniques. The thermal stability of the metal complex was studied by the thermogravimetric analysis study. The synthesized metal complex was employed for the synthesis of metal complex-coated polyether sulfone (PES) membranes which were characterized before and after filtration using the FESEM technique. The photocatalytic efficiency of the metal complex was studied for the degradation of methylene blue dye under UV irradiation in the presence of H2O2 and was compared with the photodegradation efficiency of the metal complex-coated polyether sulfone (PES) membrane.
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Affiliation(s)
- Rupy Dhir
- Department of Chemistry, GSSDGS Khalsa College, Patiala, Punjab, India 147001
| | - Bulle Shah
- Department of Chemistry, IIT Ropar, Punjab, India 140001.
| | - Narinder Singh
- Department of Chemistry, IIT Ropar, Punjab, India 140001.
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K N, A P S. Unveiling the Radiative Electron-Hole Recombination of MoS 2 Nanostructures at Extreme pH Conditions. J Fluoresc 2024:10.1007/s10895-024-03616-w. [PMID: 38381234 DOI: 10.1007/s10895-024-03616-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 02/12/2024] [Indexed: 02/22/2024]
Abstract
Nanostructures of MoS2 are in wide research for optoelectronic, energy and biological applications. Opto-electronic and biological applications requires the tuning of photoluminescence properties of MoS2 nanostructures. In this article, nanosized MoS2 is hydrothermally synthesized, and photoluminescence at extreme pH conditions (pH 1 and 13) is examined. As the photoluminescence gives a key to probe the radiative electron-hole recombination, here, photoluminescence emissions are used as an indicator to suggest the pattern of electron-hole recombination in the material at extreme pH conditions. Raman spectroscopy, dynamic light scattering, Scanning electron microscopic image and energy dispersive x-ray analysis are done for material confirmation. At pH 1 and 13 as-synthesized nanostructured MoS2 exhibited both upconversion and downconversion photoluminescence. The intensity of photoluminescence is varied with respect to pH. Excitation-dependent photoluminescence mechanisms and preliminary understanding on the ratio of quantum yields and life span of excited state of as-synthesized nanostructured MoS2 are unveiled here.
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Affiliation(s)
- Nayana K
- Department of Physics, Government Victoria College, Affiliated to University of Calicut, Palakkad, 678001, Kerala, India
- Department of Physics, N. S. S. College, Affiliated to University of Calicut, Ottapalam, Palakkad, 679103, Kerala, India
| | - Sunitha A P
- Department of Physics, Government Victoria College, Affiliated to University of Calicut, Palakkad, 678001, Kerala, India.
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Salehi G, Bagherzadeh M, Abazari R, Hajilo M, Taherinia D. Visible Light-Driven Photocatalytic Degradation of Methylene Blue Dye Using a Highly Efficient Mg-Al LDH@g-C 3N 4@Ag 3PO 4 Nanocomposite. ACS OMEGA 2024; 9:4581-4593. [PMID: 38313520 PMCID: PMC10831848 DOI: 10.1021/acsomega.3c07326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 12/22/2023] [Accepted: 01/05/2024] [Indexed: 02/06/2024]
Abstract
The issue of water resource pollution resulting from the discharge of dyes is a matter of great concern for the environment. In this investigation, a new ternary heterogeneous Mg-Al LDH@g-C3N4X@Ag3PO4Y (X = wt % of g-C3N4 with respect to Mg-Al layered double hydroxide (LDH) and Y = wt % of Ag3PO4 loaded on Mg-Al LDH@g-C3N430) nanocomposite was prepared with the aim of increasing charge carrier separation and enhancement of photocatalytic performance to degrade methylene blue (MB) dye. The prepared samples were subjected to characterization via Fourier-transform infrared spectroscopy, field emission scanning electron microscopy, energy-dispersive X-ray, transmission electron microscopy, X-ray diffraction, UV-vis diffuse reflectance spectroscopy, photoluminescence, and photoelectrochemical analysis. It was observed that in the presence of the composite of Mg-Al LDH and g-C3N4, the photocatalytic decomposition of MB under 150 W mercury lamp illumination increases significantly as opposed to Mg-Al LDH alone, and the Mg-Al LDH@g-C3N4 level with Ag3PO4 coating causes the complete degradation of MB to occur in less time. The outcomes show that the Mg-Al LDH@g-C3N430@Ag3PO45 nanocomposite demonstrated the highest photodegradation activity (99%). Scavenger tests showed that the two most effective agents in the photodegradation of MB are holes and hydroxyl radicals, respectively. Finally, a type II heterojunction photocatalytic degradation mechanism for MB by Mg-Al LDH@g-C3N430@Ag3PO45 was proposed.
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Affiliation(s)
- Ghazal Salehi
- Chemistry
Department, Sharif University of Technology, P.O. Box 11155-3615, Tehran 19166, Iran
| | - Mojtaba Bagherzadeh
- Chemistry
Department, Sharif University of Technology, P.O. Box 11155-3615, Tehran 19166, Iran
| | - Reza Abazari
- Chemistry
Department, Faculty of Science, University
of Maragheh, Maragheh 83111, Iran
| | - Mojtaba Hajilo
- Chemistry
Department, Sharif University of Technology, P.O. Box 11155-3615, Tehran 19166, Iran
| | - Davood Taherinia
- Chemistry
Department, Sharif University of Technology, P.O. Box 11155-3615, Tehran 19166, Iran
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Kuppusamy M, Kim SW, Lee KP, Jo YJ, Kim WJ. Development of TiO 2-CaCO 3 Based Composites as an Affordable Building Material for the Photocatalytic Abatement of Hazardous NO x from the Environment. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:136. [PMID: 38251101 PMCID: PMC10819092 DOI: 10.3390/nano14020136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 01/02/2024] [Accepted: 01/05/2024] [Indexed: 01/23/2024]
Abstract
This study explores the depollution activity of a photocatalytic cementitious composite comprising various compositions of n-TiO2 and CaCO3. The photocatalytic activity of the CaCO3-TiO2 composite material is assessed for the aqueous photodegradation efficiency of MB dye solution and NOx under UV light exposure. The catalyst CaCO3-TiO2 exhibits the importance of an optimal balance between CaCO3 and n-TiO2 for the highest NOx removal of 60% and MB dye removal of 74.6%. The observed trends in the photodegradation of NOx removal efficiencies suggest a complex interplay between CaCO3 and TiO2 content in the CaCO3-n-TiO2 composite catalysts. This pollutant removal efficiency is attributed to the synergistic effect between CaCO3 and n-TiO2, where a higher percentage of n-TiO2 appeared to enhance the photocatalytic activity. It is recommended that CaCO3-TiO2 photocatalysts are effectiveness in water and air purification, as well as for being cost-effective construction materials.
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Affiliation(s)
- Madhan Kuppusamy
- GOONWORLD Corporate Research Institute, Dong-gu, Daegu 41065, Republic of Korea; (M.K.); (K.-P.L.)
| | - Sun-Woo Kim
- Department of Chemistry Education, Chosun University, Gwangju 61452, Republic of Korea;
| | - Kwang-Pill Lee
- GOONWORLD Corporate Research Institute, Dong-gu, Daegu 41065, Republic of Korea; (M.K.); (K.-P.L.)
| | - Young Jin Jo
- Korea Conformity Laboratories, Daegu 42994, Republic of Korea;
| | - Wha-Jung Kim
- GOONWORLD Corporate Research Institute, Dong-gu, Daegu 41065, Republic of Korea; (M.K.); (K.-P.L.)
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Kaur H, Kumar S, Kaushal S, Badru R, Singh PP, Pugazhendhi A. Highly customized porous TiO 2-PANI nanoparticles with excellent photocatalytic efficiency for dye degradation. ENVIRONMENTAL RESEARCH 2023; 225:114960. [PMID: 36493807 DOI: 10.1016/j.envres.2022.114960] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 11/16/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
The present work encompasses a simple strategy to synthesize highly porous TiO2 by incorporating PANI polymer into the sol-gel chemistry of Titanium dioxide/Titanium (IV)-iso-propoxide (TiO2/TTIP). A series of TiO2 samples by varying wt.% of PANI, have been synthesized. A probable growth mechanism has been presented for the formation of a porous ginger-like nanostructure of TiO2-PANI (TP). HRTEM images reveal that the particle size range is 6-16 nm for pristine TiO2 and 5-13 nm for TP samples. XPS analysis confirms the presence of the hydrogen bonds in-between surface hydroxyl groups (Ti-OH) of TiO2 and the protonated nitrogen of PANI. UV-visible absorption study reveals a small shift towards longer wavelength for TP8 sample than that of pristine TiO2 (λmax = 314 nm) as well as reduction in Eg value from 3.02 eV to 2.89 eV. FTIR results confirm the successful interaction of PANI and TiO2. BJH and BET analysis confirms an increase of porosity in TP8 sample with an average pore volume of 0.36 cm3 g-1. High photocatalytic activity (98.77%) towards Methylene blue dye degradation is observed for TP8 sample having 8 wt% of PANI and it is explained through the combined effect of structural porosity of TiO2 and synergic effect of PANI. The Kappa value at pH 11 (0.01372 min-1) is found to be 7.84-folds higher than that of the photocatalytic reaction at pH 3 (Kappa = 0.00175 min-1). While pristine TiO2 exhibits the minimum removal efficiency (89.57%) with Kappa of 0.00756 min-1. Kappa value of catalysis reaction for TP8 is found to be almost 2-fold higher than pristine TiO2. Quantum Yield value for TP8 is found to be 3.59 × 10-4 molecules photon-1. This high Quantum Yield value of present photocatalytic system explicates the low energy consumption for the treatment of textile dye pollutant. Additionally, STY value (1.79 × 10-5 molecules photon-1 mg-1) confirms the outstanding mineralization strength of TP8 by a unit mass for high amounts of MB dye per unit time. Thus, the present study offers an excellent photocatalyst i.e., TP8 having 8 wt% of PANI for the degradation of MB dye.
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Affiliation(s)
- Harpreet Kaur
- Department of Physics, Chandigarh University, Gharuan, Mohali, 140413, India; Department of Physics, Sri Guru Granth Sahib World University, Fatehgarh Sahib, Punjab, 140407, India
| | - Sanjeev Kumar
- Department of Physics, Sri Guru Granth Sahib World University, Fatehgarh Sahib, Punjab, 140407, India
| | - Sandeep Kaushal
- Department of Chemistry, Sri Guru Granth Sahib World University, Fatehgarh Sahib, Punjab, 140407, India
| | - Rahul Badru
- Department of Chemistry, Sri Guru Granth Sahib World University, Fatehgarh Sahib, Punjab, 140407, India
| | - Prit Pal Singh
- Department of Chemistry, Sri Guru Granth Sahib World University, Fatehgarh Sahib, Punjab, 140407, India
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Utami M, Wang S, Musawwa MM, Purbaningtias TE, Fitri M, Yuspita I, Abd-Elkader OH, Yadav KK, Munusamy-Ramanujam G, Bang D, Chang SW, Balasubramani R. Simultaneous photocatalytic removal of organic dye and heavy metal from textile wastewater over N-doped TiO 2 on reduced graphene oxide. CHEMOSPHERE 2023; 332:138882. [PMID: 37164194 DOI: 10.1016/j.chemosphere.2023.138882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 04/12/2023] [Accepted: 05/06/2023] [Indexed: 05/12/2023]
Abstract
Methylene blue (MB) and hexavalent chromium Cr(VI) are hazardous pollutants in textile waste and cannot be completely removed using conventional methods. So far, there have been no specific studies examining the synthesis and activity of N-TiO2/rGO as a photocatalyst for removing MB and Cr(VI) from textile wastewater. This work especially highlights the synthesis of N-TiO2/rGO as a photocatalyst which exhibits a wider range of light absorption and is highly effective for simultaneous removal of MB-Cr(VI) under visible light. Titanium tetrachloride (TiCl4) was used as the precursor for N-TiO2 synthesis using the sol-gel method. Graphite was oxidized using Hummer's method and reduced with hydrazine to produce rGO. N-TiO2/rGO was synthesized using a hydrothermal process and then analyzed using several characterization instruments. The X-ray diffraction pattern (XRD) showed that the anatase N-TiO2/rGO phase was detected at the diffraction peak of 2θ = 25.60°. Scanning electron microscopy and transmission electron microscopy (SEM-EDS and TEM) dispersive X-ray spectrometry images show that N-TiO2 particles adhere to the surface of rGO with uniform size and N and Ti elements are present in the N-TiO2/rGO combined investigated. Gas absorption analysis data (GSA) shows that N-TiO2/rGO had a surface area of 77.449 m2/g, a pore volume of 0.335 cc/g, and a pore size of 8.655 nm. The thermogravimetric differential thermal analysis (TG-DTA) curve showed the anatase phase at 500-780 °C with a weight loss of 0.85%. The N-TiO2/rGO composite showed a good photocatalyst application. The photocatalytic activity of N-TiO2/rGO for textile wastewater treatment under visible light showed higher effectiveness than ultraviolet light, with 97.92% for MB and 97.48% for Cr(VI). Combining N-TiO2 with rGO is proven to increase the light coverage in the visible light region. Removal of MB and Cr(VI) can be carried out simultaneously and results in a removal efficiency of 95.96%.
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Affiliation(s)
- Maisari Utami
- Departement of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia, Yogyakarta, 55584, Indonesia.
| | - Shaobin Wang
- School of Chemical Engineering and Advanced Materials, University of Adelaide, Adelaide SA, 5005, Australia
| | - Muhammad Miqdam Musawwa
- Departement of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia, Yogyakarta, 55584, Indonesia
| | - Tri Esti Purbaningtias
- Departement of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia, Yogyakarta, 55584, Indonesia
| | - Melinda Fitri
- Departement of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia, Yogyakarta, 55584, Indonesia
| | - Indah Yuspita
- Departement of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia, Yogyakarta, 55584, Indonesia
| | - Omar H Abd-Elkader
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Krishna Kumar Yadav
- Faculty of Science and Technology, Madhyanchal Professional University, Ratibad, Bhopal, 462044, India
| | - Ganesh Munusamy-Ramanujam
- Molecular Biology and Immunobiology Division, Interdisciplinary Institute of Indian System of Medicine, SRM-IST, Kattankulathur, Tamil Nadu, 603203, India.
| | - Donggyu Bang
- Department of Environmental Energy & Engineering, Kyonggi University, Suwon-si, Gyeonggi-do, 16227, South Korea
| | - Soon Woong Chang
- Department of Environmental Energy & Engineering, Kyonggi University, Suwon-si, Gyeonggi-do, 16227, South Korea
| | - Ravindran Balasubramani
- Department of Environmental Energy & Engineering, Kyonggi University, Suwon-si, Gyeonggi-do, 16227, South Korea.
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Manojkumar U, Kaliannan D, Srinivasan V, Balasubramanian B, Kamyab H, Mussa ZH, Palaniyappan J, Mesbah M, Chelliapan S, Palaninaicker S. Green synthesis of zinc oxide nanoparticles using Brassica oleracea var. botrytis leaf extract: Photocatalytic, antimicrobial and larvicidal activity. CHEMOSPHERE 2023; 323:138263. [PMID: 36858116 DOI: 10.1016/j.chemosphere.2023.138263] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 02/05/2023] [Accepted: 02/26/2023] [Indexed: 06/18/2023]
Abstract
Green synthesis of nanomaterials has emerged as an ecofriendly sustainable technology for the removal of dyes in the last few decades. Especially, plant leaf extracts have been considered as inexpensive and effective materials for the synthesis of nanoparticles. In this study, zinc oxide nanoparticles (ZnO NPs) were prepared using leaves extract of Brassica oleracea var. botrytis (BO) by co-precipitation and applied for photocatalytic/antibacterial activity. The synthesized BO-ZnO NPs was characterized by different instrumental techniques. The UV-vis Spectrum of the synthesized material showed maximum absorbance at a wavelength of 311 nm, which confirmed the formation of BO-ZnO NPs. The XRD pattern of BO-ZnO NPs represents a hexagonal wurtzite structure and the average size of particles was about 52 nm. FT-IR spectrum analysis confirms the presence of hydroxyl, carbonyl, carboxylic, and phenol groups. SEM images exhibited a flower like morphology and EDX spectrum confirming the presence of the elements Zn and O. Photo-catalytic activity of BO-ZnO NPs was tested against thiazine dye (methylene blue-MB) degradation under direct sunlight irradiation. Around 80% of the MB dye got degraded at pH 8 under 75 min of sunlight irradiation. Further, the study examined that the antimicrobial and larvicidal activity of BO-ZnO NPs obtained through green synthesis. The antimicrobial study results showed that the BO-ZnO NPs formed zones against bacterial pathogens. The results showed the formation of an inhibition zone against B. subtills (16 mm), S.aureus (13 mm), K. pneumonia (13 mm), and E. coli (9 mm) respectively at a concentration of 100 μg/mL of BO-ZnO NPs. The larvicidal activity of the BO-ZnO NPs was tested against the fourth instar of Culex quinquefasciatus mosquito larvae The LC50 and LC90 values estimated through the larvicidal activity of BO-ZnO NPs were 76.03, 190.03 ppm respectively. Hence the above findings propose the synthesized BO-ZnO NPs by the ecofriendly method can be used for various environmental and antipathogenic applications.
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Affiliation(s)
- Utaiyachandran Manojkumar
- Department of Environmental Science, School of Energy & Environmental Sciences, Periyar University, Salem, Tamil Nadu, 636011, India
| | - Durairaj Kaliannan
- Department of Infection Biology, School of Medicine, Wonkwang University, Lksan, 54538, South Korea
| | - Venkatesan Srinivasan
- Department of Environmental Science, School of Energy & Environmental Sciences, Periyar University, Salem, Tamil Nadu, 636011, India
| | | | - Hesam Kamyab
- Faculty of Architecture and Urbanism, UTE University, Calle Rumipamba S/N and Bourgeois, Quito, Ecuador; Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia.
| | | | - Jayanthi Palaniyappan
- Department of Environmental Science, School of Energy & Environmental Sciences, Periyar University, Salem, Tamil Nadu, 636011, India
| | - Mohsen Mesbah
- Engineering Department, Razak Faculty of Technology & Informatics, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia.
| | - Shreeshivadasan Chelliapan
- Engineering Department, Razak Faculty of Technology & Informatics, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia
| | - Senthilkumar Palaninaicker
- Department of Environmental Science, School of Energy & Environmental Sciences, Periyar University, Salem, Tamil Nadu, 636011, India.
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Ali M, Riaz S, Sherif ESM, Ansari MZ, Farid HMT. Study of vanadium oxide nanoparticles for optical and biomedical applications. APPLIED NANOSCIENCE 2023. [DOI: 10.1007/s13204-023-02819-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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10
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Jevtovic V, Khan AU, Almarhoon ZM, Tahir K, Latif S, Abdulaziz F, Albalawi K, Zaki MEA, Rakic V. Synthesis of MnSe-Based GO Composites as Effective Photocatalyst for Environmental Remediations. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:667. [PMID: 36839035 PMCID: PMC9959166 DOI: 10.3390/nano13040667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 02/03/2023] [Accepted: 02/05/2023] [Indexed: 06/18/2023]
Abstract
In this work, a manganese selenide/graphene oxide (MnSe/GO)-based composite was prepared for wet-chemical assisted method against organic dye; herein, methylene blue (MB) dye removal from the water was employed as a metal selenide-based photocatalyst. The synthesized MnSe/GO composite was systematically characterized by X-ray diffraction (XRD), Fourier transform electron microscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and UV-visible diffuse reflectance spectroscopy (UV-vis. DRS). The structural characteristic revealed the adequate synthesis of the sample with good crystallinity and purity of the obtained products. The morphological analysis indicates the formation of MnSe nanoflakes composed of tiny particles on their surface. At the same time, the GO nanosheets with high aggregation were formed, which may be due to the van der Waals forces. The bond interaction and compositional analysis studies confirmed and supported the structural findings with high purity. The optical analysis showed the bandgap energies of MnSe and their composites MnSe (1.7 eV), 7% GO-MnSe (2.42 eV), 14% GO-MnSe (2.6 eV), 21% GO-MnSe (3.02 eV), and 28% GO-MnSe (3.24 eV) respectively, which increase the bandgap energy after GO and MnSe recombination. Among different contents, the optimized 21% GO-MnSe composite displayed enhanced photocatalytic properties. For instance, a short time of 90 min was taken compared with other concentrations due to the narrow bandgap of MnSe and the highly conductive charge carrier's support, making the process to remove MB from water faster. These results show that the selenide-based photocatalyst can be an attractive candidate for future advanced photocatalysis applications.
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Affiliation(s)
- Violeta Jevtovic
- Department of Chemistry, College of Science, University of Ha’il, Ha’il 81451, Saudi Arabia
| | - Afaq Ullah Khan
- State Key Laboratory of Chemical Resource Engineering, School of Science, Beijing University of Chemical Technology, Beijing 100029, China
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Zainab M. Almarhoon
- Chemistry Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Kamran Tahir
- Institute of Chemical Sciences, Gomal University, Dera Ismail Khan 29050, Pakistan
| | - Salman Latif
- Department of Chemistry, College of Science, University of Ha’il, Ha’il 81451, Saudi Arabia
| | - Fahad Abdulaziz
- Department of Chemistry, College of Science, University of Ha’il, Ha’il 81451, Saudi Arabia
| | - Karma Albalawi
- Department of Chemistry, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia
| | - Magdi E. A. Zaki
- Department of Chemistry, Faculty of Science, Imam Mohammad Ibn Saud Islamic University, Riyadh 11623, Saudi Arabia
| | - Violeta Rakic
- Department of Agriculture and Food Technology Prokuplje, Academy of Vocational Studies of South Serbia, 18400 Prokuplje, Serbia
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Photocatalysis and Antibacterial Activity Studies of Biopolymer Incorporated Green Synthesized Nano TiO2 Without UV Rays Irradiation. J Inorg Organomet Polym Mater 2023. [DOI: 10.1007/s10904-023-02531-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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12
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Bhapkar A, Prasad R, Jaspal D, Shirolkar M, Gheisari K, Bhame S. Visible light driven photocatalytic degradation of methylene blue by ZnO nanostructures synthesized by glycine nitrate auto combustion route. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2022.110311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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13
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Dursun S, Akyıldız H, Kalem V. Production of CuCoO2 nanoparticle/SnO2 nanofiber heterostructures for visible light photocatalytic applications. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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14
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da Silva DJ, Duran A, Cabral AD, Fonseca FLA, Bueno RF, Wang SH, Rosa DS. Delta SARS-CoV-2 inactivation and bactericidal performance of cotton wipes decorated with TiO 2/Ag nanoparticles like Brazilian heavy-fruited Myrciaria cauliflora. MATERIALS TODAY. COMMUNICATIONS 2022; 33:104288. [PMID: 36033158 PMCID: PMC9394096 DOI: 10.1016/j.mtcomm.2022.104288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 08/01/2022] [Accepted: 08/19/2022] [Indexed: 06/15/2023]
Abstract
The current pandemic of Coronavirus Disease 2019 (COVID-19) raised several concerns about using conventional textiles for manufacturing personal protective equipment without self-disinfecting properties since the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) is transmitted mainly by aerosols that can transpose cotton masks. Therefore, developing new cotton fibers with high self-disinfecting ability is essential to avoid a new pandemic due to new SARS-CoV-2 variants. Herein, we developed cotton wipes (CFs) with fibers coated by Ag, TiO2, and Ag/TiO2 hybrid nanoparticles like Brazilian heavy-fruited Myrciaria cauliflora by a sonochemical approach. Moreover, the coated CFs present high antimicrobial performance against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), being able to inactivate infectious SARS-CoV-2 (Delta variant) by the destruction of the spike, membrane, and nucleocapsid proteins while the viral RNA is not significantly affected, according to the molecular biological findings.
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Affiliation(s)
- Daniel J da Silva
- Center for Engineering, Modeling, and Applied Social Sciences (CECS), Federal University of ABC (UFABC), Av. dos Estados 5001, Santo André, SP 09210-210, Brazil
- Department of Metallurgical and Materials Engineering, Polytechnic School, University of São Paulo, Av. Prof. Mello Moraes 2643, São Paulo, SP, 05508-030, Brazil
| | - Adriana Duran
- Center for Engineering, Modeling, and Applied Social Sciences (CECS), Federal University of ABC (UFABC), Av. dos Estados 5001, Santo André, SP 09210-210, Brazil
| | - Aline D Cabral
- Center for Engineering, Modeling, and Applied Social Sciences (CECS), Federal University of ABC (UFABC), Av. dos Estados 5001, Santo André, SP 09210-210, Brazil
| | - Fernando L A Fonseca
- Faculty of Medicine of ABC (FMABC), Department of Clinical Analysis, Av. Lauro Gomes 2000, Santo André, SP 09060-870, Brazil
| | - Rodrigo F Bueno
- Coordinator of the COVID-19 Monitoring Network in Wastewater National Water and Basic Sanitation Agency, Ministry of Science, Technology and Innovation and Ministry of Health, Brazil. Center for Engineering, Modeling, and Applied Social Sciences (CECS), Federal University of ABC (UFABC), Av. dos Estados 5001, Santo André, SP 09210-210, Brazil
| | - Shu Hui Wang
- Department of Metallurgical and Materials Engineering, Polytechnic School, University of São Paulo, Av. Prof. Mello Moraes 2643, São Paulo, SP, 05508-030, Brazil
| | - Derval S Rosa
- Center for Engineering, Modeling, and Applied Social Sciences (CECS), Federal University of ABC (UFABC), Av. dos Estados 5001, Santo André, SP 09210-210, Brazil
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Zhu J, Liu Z, Yang F, Long D, Jian Y, Pu S. The Preparation of {001}TiO 2/TiOF 2 via a One-Step Hydrothermal Method and Its Degradation Mechanism of Ammonia Nitrogen. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15186465. [PMID: 36143777 PMCID: PMC9505796 DOI: 10.3390/ma15186465] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/13/2022] [Accepted: 09/14/2022] [Indexed: 05/06/2023]
Abstract
{001}TiO2/TiOF2 photocatalytic composites with a high activity {001} crystal plane were prepared by one-step hydrothermal methods using butyl titanate as a titanium source and hydrofluoric acid as a fluorine source. X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), raman spectroscopy, N2 adsorption-desorption curve (BET), UV-Vis diffuse absorption spectroscopy (UV-Vis DRS), X-ray photoelectron spectroscopy (XPS), and fluorescence spectroscopy (PL) were used to evaluate the structure, morphology, specific surface area, optical properties, and photocarrier separation ability of {001}TiO2/TiOF2. Ammonia nitrogen was taken as the target pollutant, and the degradation performance of the catalyst was investigated. The results show that hydrofluoric acid improves the content of {001} crystal plane of TiO2 with high activity; it also improves the specific surface area and dispersion of the composite material and adjusts the ratio of {001}TiO2 to TiOF2 in the composite material to enhance the absorption capacity of the composite material and reduce the band gap width of the composite material. The degradation rate of ammonia nitrogen by 100 mg F15 is 93.19% when the initial concentration of ammonia nitrogen is 100 mg/L and pH is 10. Throughout the reaction process, the {001}TiO2/TiOF2 composite produces superoxide anion radical (·O2-) and hydroxyl radical (·OH) to oxidize NH3·H2O and generate N2 accompanied by a small amount of NO3- and NO2-.
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Affiliation(s)
- Jiaming Zhu
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
| | - Zuohua Liu
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
| | - Feiyun Yang
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
| | - Dingbiao Long
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
- Correspondence: (D.L.); (S.P.)
| | - Yue Jian
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
| | - Shihua Pu
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
- Correspondence: (D.L.); (S.P.)
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16
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Preparation and Real World Applications of Titania Composite Materials for Photocatalytic Surface, Air, and Water Purification: State of the Art. INORGANICS 2022. [DOI: 10.3390/inorganics10090139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The semiconducting transition metal oxide TiO2 is a rather cheap and non-toxic material with superior photocatalytic properties. TiO2 thin films and nanoparticles are known to have antibacterial, antiviral, antifungal, antialgal, self, water, and air-cleaning properties under UV or sun light irradiation. Based on these excellent qualities, titania holds great promises in various fields of applications. The vast majority of published field and pilot scale studies are dealing with the modification of building materials or generally focus on air purification. Based on the reviewed papers, for the coating of glass, walls, ceilings, streets, tunnels, and other large surfaces, titania is usually applied by spray-coating due to the scalibility and cost-efficiency of this method compared to alternative coating procedures. In contrast, commercialized applications of titania in medical fields or in water purification are rarely found. Moreover, in many realistic test scenarios it becomes evident that the photocatalytic activity is often significantly lower than in laboratory settings. In this review, we will give an overview on the most relevant real world applications and commonly applied preparation methods for these purposes. We will also look at the relevant bottlenecks such as visible light photocatalytic activity and long-term stability and will make suggestions to overcome these hurdles for a widespread usage of titania as photocalyst.
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17
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Mhemid RKS, Salman MS, Mohammed NA. Comparing the efficiency of N-doped TiO 2 and commercial TiO 2 as photo catalysts for amoxicillin and ciprofloxacin photo-degradation under solar irradiation. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2022; 57:813-829. [PMID: 36073063 DOI: 10.1080/10934529.2022.2117960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 08/17/2022] [Accepted: 08/21/2022] [Indexed: 06/15/2023]
Abstract
Advanced oxidation processes (AOPs) have gained traction as alternative solutions for eliminating pollutants from pharmaceutical wastewater for reuse. In this research, the performance of two photo-catalysts (Commercial TiO2 and synthesis N-doped TiO2) were compared in terms of the degradation of amoxicillin and ciprofloxacin from an aqueous solution using a photo-catalytic batch system under solar irradiation. The influence of five operating factors is: pH (5-11), H2O2 concentrations (200-600) mg/L, catalyst concentrations (25-100 mg/L), Antibiotic concentration (25-100) mg/L and reaction time (30-120 min), on the oxidation of the listed above pollutants were investigated using the central composite design (CCD) of response surface methodology (RSM). The catalyst of N-doping TiO2 was synthesized by sol-gel method, using the urea (CH4N2O) as a nitrogen source. The resulting material was analyzed using Scanning Electron Microscopy (SEM), X-Ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). Additionally, it can be observed from the analysis of the characteristics of N-doped TiO2 the homogenous dispersion of nitrogen molecules, small particle sizes, and energy-gap reduction, prompting a 6% increase in antibiotic degradation compared with Com. TiO2. In the RSM analysis, the ideal conditions were found to be a pH of 5, H2O2 conc. of 400 mg/L, catalyst conc. of 50 mg, and antibiotics conc. of 25 mg/L for an antibiotics reduction rate of 89.31% (AMOX/Com. TiO2/Solar), 90.2 (CFX/Com. TiO2/Solar), 95.8% (AMOX/N-TiO2/Solar) and 97.3% (CFX/N-TiO2/Solar). Experimental results were in good agreement with predictions because the predicted R2 matched well with the adjusted R2.
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Affiliation(s)
- Rasha Khalid Sabri Mhemid
- Department of Environmental Technology, College of Environmental Science and Technology, University of Mosul, Mosul, Iraq
| | | | - Noor A Mohammed
- Department of Environmental Engineering, College of Engineering, University of Baghdad, Baghdad, Iraq
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18
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Makarava I, Esmaeili M, Kharytonau DS, Pelcastre L, Ryl J, Bilesan MR, Vuorinen E, Repo E. Influence of CeO 2 and TiO 2 Particles on Physicochemical Properties of Composite Nickel Coatings Electrodeposited at Ambient Temperature. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15165550. [PMID: 36013691 PMCID: PMC9414914 DOI: 10.3390/ma15165550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/21/2022] [Accepted: 08/10/2022] [Indexed: 05/17/2023]
Abstract
The Ni-TiO2 and Ni-CeO2 composite coatings with varying hydrophilic/hydrophobic characteristics were fabricated by the electrodeposition method from a tartrate electrolyte at ambient temperature. To meet the requirements of tight regulation by the European Chemicals Agency classifying H3BO3 as a substance of very high concern, Rochelle salt was utilized as a buffer solution instead. The novelty of this study was to implement a simple one-step galvanostatic electrodeposition from the low-temperature electrolyte based on a greener buffer compared to traditionally used, aiming to obtain new types of soft-matrix Ni, Ni-CeO2, and Ni-TiO2 coatings onto steel or copper substrates. The surface characteristics of electrodeposited nickel composites were evaluated by SEM, EDS, surface contact angle measurements, and XPS. Physiochemical properties of pure Ni, Ni-CeO2, and Ni-TiO2 composites, namely, wear resistance, microhardness, microroughness, and photocatalytic activity, were studied. Potentiodynamic polarization, EIS, and ICP-MS analyses were employed to study the long-term corrosion behavior of coatings in a 0.5 M NaCl solution. Superior photocatalytic degradation of methylene blue, 96.2% after 6 h of illumination, was achieved in the case of Ni-TiO2 composite, while no substantial change in the photocatalytic behavior of the Ni-CeO2 compared to pure Ni was observed. Both composites demonstrated higher hardness and wear resistance than pure Ni. This study investigates the feasibility of utilizing TiO2 as a photocatalytic hydrophilicity promoter in the fabrication of composite coatings for various applications.
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Affiliation(s)
- Iryna Makarava
- Department of Separation Science, School of Engineering Science, LUT University, Yliopistonkatu 34, FI-53850 Lappeenranta, Finland
- Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz Institute Freiberg for Resource Technology, 09599 Freiberg, Germany
- Correspondence:
| | - Mohammadamin Esmaeili
- Department of Separation Science, School of Engineering Science, LUT University, Yliopistonkatu 34, FI-53850 Lappeenranta, Finland
| | - Dzmitry S. Kharytonau
- Soft Matter Nanostructures Group, Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, PL-30239 Krakow, Poland
| | - Leonardo Pelcastre
- Division of Machine Elements, Luleå University of Technology, Regnbågsallén, SE-97187 Luleå, Sweden
| | - Jacek Ryl
- Institute of Nanotechnology and Materials Engineering, Faculty of Applied Physics and Mathematics, Gdansk University of Technology, Narutowicza St. 11/12 Gdansk, PL-80233 Gdansk, Poland
| | - Mohammad Reza Bilesan
- Department of Separation Science, School of Engineering Science, LUT University, Yliopistonkatu 34, FI-53850 Lappeenranta, Finland
| | - Esa Vuorinen
- Division of Materials Science, Luleå University of Technology, Regnbågsallén, SE-97187 Luleå, Sweden
| | - Eveliina Repo
- Department of Separation Science, School of Engineering Science, LUT University, Yliopistonkatu 34, FI-53850 Lappeenranta, Finland
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19
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Ramakrishnan K, Gayathri V, Aravinthkumar K, Ramachandran K, Ajitha B, Rameshbabu M, Sasiflorence S, S.Karazhanov, Praba K, Raja Mohan C. TiO2/CeO2 Core/Shell Nanostructures for Photocatalytic and Photo Electrochemical Applications. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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20
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Sunny NE, Mathew SS, Chandel N, Saravanan P, Rajeshkannan R, Rajasimman M, Vasseghian Y, Rajamohan N, Kumar SV. Green synthesis of titanium dioxide nanoparticles using plant biomass and their applications- A review. CHEMOSPHERE 2022; 300:134612. [PMID: 35430203 DOI: 10.1016/j.chemosphere.2022.134612] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 03/25/2022] [Accepted: 04/11/2022] [Indexed: 06/14/2023]
Abstract
Biosynthesized nanoparticles have sparked a lot of interest as rapidly growing classes of materials for different applications. Plants are considered to be one of the most suitable sources for Green synthesis (GS) as they follow the environment-friendly route of biosynthesis of nanoparticles (NPs). This article focuses on the excavation of Titanium dioxide (TiO2) NP from different parts of plants belonging to a distinct classification of taxonomic groups. During the process of biological synthesis of titanium NPs from plants, the extract derived from plant sources such as from root, stem, leaves, seeds, flowers, and latex possesses phytocompounds that tend to serve as both capping as well as reducing agents. TiO2NP is one of the most commonly used engineered nanomaterials in nanotechnology-based consumer products. This article will provide an overview of the GS and characterization of TiO2NPs from plant extracts of different taxonomic groups. Lastly, this review summarizes the current applications of TiO2NPs.
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Affiliation(s)
- Nisha Elizabeth Sunny
- Department of Biotechnology, School of Bio Sciences and Technology, Vellore Institute of Technology (VIT), Vellore, 632014, India
| | - Sneha Susan Mathew
- Department of Biotechnology, School of Bio Sciences and Technology, Vellore Institute of Technology (VIT), Vellore, 632014, India
| | - Nandita Chandel
- Department of Biotechnology, School of Bio Sciences and Technology, Vellore Institute of Technology (VIT), Vellore, 632014, India
| | - Panchamoorthy Saravanan
- Department of Petro Chemical Technology, University College of Engineering-BIT Campus, Anna University, Tiruchirappalli, 620 024, India
| | - R Rajeshkannan
- Department of Chemical Engineering, Annamalai University, Annamalai Nagar, Chidambaram, India
| | - M Rajasimman
- Department of Chemical Engineering, Annamalai University, Annamalai Nagar, Chidambaram, India
| | - Yasser Vasseghian
- Department of Chemistry, Soongsil University, Seoul, 06978, South Korea; The University of Johannesburg, Department of Chemical Engineering, P.O. Box 17011, Doornfontein 2088, South Africa; Department of Chemical Engineering, Quchan University of Technology, Quchan, Iran
| | - N Rajamohan
- Chemical Engineering Section, Faculty of Engineering, Sohar University, Sohar, Oman
| | - S Venkat Kumar
- Department of Biotechnology, School of Bio Sciences and Technology, Vellore Institute of Technology (VIT), Vellore, 632014, India.
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21
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Highly Efficient Ag-Doped Ba0.5Sr0.5ZrO3 Nanocomposite with Enhanced Photocatalytic and Antibacterial Activity. J CLUST SCI 2022. [DOI: 10.1007/s10876-021-02071-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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22
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Ethanol mediated photoinduced reversible adsorption of methylene blue on nano titanium dioxide. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04759-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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The sono-photocatalytic performance of a Fe2O3 coated TiO2 based hybrid nanofluid under visible light via RSM. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128545] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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24
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Su JC, Hsieh TL, Yang SM, Chao SC, Lu KC. Fabrication and Photocatalytic Properties of Zinc Tin Oxide Nanowires Decorated with Silver Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:1201. [PMID: 35407319 PMCID: PMC9000500 DOI: 10.3390/nano12071201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 03/30/2022] [Accepted: 03/31/2022] [Indexed: 12/19/2022]
Abstract
With the continuous advancement of high-tech industries, how to properly handle pollutants has become urgent. Photocatalysis is a solution that may effectively degrade pollutants into harmless molecules. In this study, we synthesized single crystalline Zn2SnO4 (ZTO) nanowires through chemical vapor deposition and selective etching. The chemical bath redox method was used to modify the ZTO nanowires with Ag nanoparticles to explore the photocatalytic properties of the nanoheterostructures. The combination of the materials here is rare. Optical measurements by photoluminescence (PL) and UV-Vis show that the PL spectrum of ZTO nanowires was mainly in the visible light region and attributed to oxygen vacancies. The luminescence intensity of the nanowires was significantly reduced after modification, demonstrating that the heterojunction could effectively reduce the electron-hole pair recombination. The reduction increased with the increase in Ag decoration. The conversion from the UV-Vis absorption spectrum to the Tauc Plot shows that the band gap of the nanowire was 4.05 eV. With 10 ppm methylene blue (MB) as the degradation solution, ZTO nanowires exhibit excellent photodegradation efficiency. Reusability and stability in photodegradation of the nanowires were demonstrated. Photocatalytic efficiency increases with the number of Ag nanoparticles. The main reaction mechanism was confirmed by photocatalytic inhibitors. This study enriches our understanding of ZTO-based nanostructures and facilitates their applications in water splitting, sewage treatment and air purification.
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Affiliation(s)
- Jia-Chi Su
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan; (J.-C.S.); (T.-L.H.); (S.-M.Y.); (S.-C.C.)
| | - Tsung-Lin Hsieh
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan; (J.-C.S.); (T.-L.H.); (S.-M.Y.); (S.-C.C.)
| | - Shu-Meng Yang
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan; (J.-C.S.); (T.-L.H.); (S.-M.Y.); (S.-C.C.)
| | - Shao-Chun Chao
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan; (J.-C.S.); (T.-L.H.); (S.-M.Y.); (S.-C.C.)
| | - Kuo-Chang Lu
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan; (J.-C.S.); (T.-L.H.); (S.-M.Y.); (S.-C.C.)
- Core Facility Center, National Cheng Kung University, Tainan 701, Taiwan
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Enhanced photo-fenton and photoelectrochemical activities in nitrogen doped brownmillerite KBiFe 2O 5. Sci Rep 2022; 12:5111. [PMID: 35332159 PMCID: PMC8948261 DOI: 10.1038/s41598-022-08966-8] [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: 01/03/2022] [Accepted: 03/09/2022] [Indexed: 11/08/2022] Open
Abstract
Visible-light-driven photo-fenton-like catalytic activity and photoelectrochemical (PEC) performance of nitrogen-doped brownmillerite KBiFe2O5 (KBFO) are investigated. The effective optical bandgap of KBFO reduces from 1.67 to 1.60 eV post N-doping, enabling both enhancement of visible light absorption and photoactivity. The photo-fenton activity of KBFO and N-doped KBFO samples were analysed by degrading effluents like Methylene Blue (MB), Bisphenol-A (BPA) and antibiotics such as Norfloxacin (NOX) and Doxycycline (DOX). 20 mmol of Nitrogen-doped KBFO (20N-KBFO) exhibits enhanced catalytic activity while degrading MB. 20N-KBFO sample is further tested for degradation of Bisphenol-A and antibiotics in the presence of H2O2 and chelating agent L-cysteine. Under optimum conditions, MB, BPA, and NOX, and DOX are degraded by 99.5% (0.042 min-1), 83% (0.016 min-1), 72% (0.011 min-1) and 95% (0.026 min-1) of its initial concentration respectively. Photocurrent density of 20N-KBFO improves to 8.83 mA/cm2 from 4.31 mA/cm2 for pure KBFO. Photocatalytic and photoelectrochemical (PEC) properties of N-doped KBFO make it a promising candidate for energy and environmental applications.
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26
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Das D, Sharma AK, Chattopadhyay KK, Banerjee D. Dye Removal Ability of Pure and Doped Graphitic Carbon Nitride. CURR ANAL CHEM 2022. [DOI: 10.2174/1573411017666210108092850] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Rapid escalation in textile, paper, pesticides, pharmaceuticals and several other chemical based
manufacturing industries due to amplification in human requirements have proportionately contributed to the extreme
contamination of water ecosystem, resulted from the discharge of toxic pollutants from industries. Effluents from textile
industries are comprised of coloured dyes like Rhodamine B, Methyl Orange, Methylene Blue and phenolic compounds
which deserve special mention owing to their non-biodegradable, carcinogenic and severe detrimental nature. Urgent
needs to ameliorate this fast declining environmental situation are of immense necessity in current scenario.
Objectives:
Objectives: In this regard, graphitic carbon nitride (GCN) is a distinguished material for water purification-based
applications because of its exclusive characteristics making it highly prospective for degradation of toxic dyes from water
by catalysis and adsorption techniques. GCN has been a material of conspicuous interest in recent times owing to its two
dimensional sheets like structure with favourable surface area, and cost-effective synthesis approaches along with high
production yield. This article presents a detail study of different aspects of GCN as a material of potential for water
purification. Through extensive literature survey it has been shown that GCN is an effective material to be used in the
fields of application. Several effective procedures like catalysis or adsorption for removal of dyes from water have been
discussed with their basic science behind.
Conclusions:
This systematic effort shows that GCN can be considered to be one of the most efficient water purifier with
further advantages arising from its easy and cost effective large scale synthesis.
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Affiliation(s)
- Dimitra Das
- School of Materials Science and Nanotechnology, Jadavpur University, Kolkata,India
| | - Amit Kuamr Sharma
- Faculty of Engineering and Computing Sciences, Teerthanker Mahaveer University, Moradabad, UP 244001,India
| | | | - Diptonil Banerjee
- Faculty of Engineering and Computing Sciences, Teerthanker Mahaveer University, Moradabad, UP 244001,India
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27
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Muslim M, Ali A, Kamaal S, Ahmad M, Jane Alam M, Rahman QI, Shahid M. Efficient adsorption and facile photocatalytic degradation of organic dyes over H-bonded proton-transfer complex: An experimental and theoretical approach. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.117951] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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28
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The Photocatalytic Performance of Ag-Decorated SiO2 Nanoparticles (NPs) and Binding Ability between Ag NPs and Modifiers. COATINGS 2022. [DOI: 10.3390/coatings12020146] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
This study demonstrates a method for synthesizing Ag-decorated SiO2 NPs, which combined surface modification and electroless plating. The binding ability between the Ag NPs and modifiers was also investigated for the first time. The resulting products were characterized by electron microscopy and a UV–Visible spectrophotometer, which confirmed that OH− modified composite has the most uniform coating of Ag NPs and the largest Ag elemental composition. The efficiency of degrading methylene blue (MB) under visible light for 60 min was above 99%. The normalized reaction constant also confirmed the experimental results. In brief, this study verifies an optimal surface modifier of the binding ability with Ag NPs and the feasibility of this structure to effectively absorb the solar spectrum and further apply it to the photodegradation reaction.
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Abstract
The unavailability of clean drinking water is one of the significant health issues in modern times. Industrial dyes are one of the dominant chemicals that make water unfit for drinking. Among these dyes, methylene blue (MB) is toxic, carcinogenic, and non-biodegradable and can cause a severe threat to human health and environmental safety. It is usually released in natural water sources, which becomes a health threat to human beings and living organisms. Hence, there is a need to develop an environmentally friendly, efficient technology for removing MB from wastewater. Photodegradation is an advanced oxidation process widely used for MB removal. It has the advantages of complete mineralization of dye into simple and nontoxic species with the potential to decrease the processing cost. This review provides a tutorial basis for the readers working in the dye degradation research area. We not only covered the basic principles of the process but also provided a wide range of previously published work on advanced photocatalytic systems (single-component and multi-component photocatalysts). Our study has focused on critical parameters that can affect the photodegradation rate of MB, such as photocatalyst type and loading, irradiation reaction time, pH of reaction media, initial concentration of dye, radical scavengers and oxidising agents. The photodegradation mechanism, reaction pathways, intermediate products, and final products of MB are also summarized. An overview of the future perspectives to utilize MB at an industrial scale is also provided. This paper identifies strategies for the development of effective MB photodegradation systems.
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Trocha A, Impert O, Katafias A, van Eldik R. Mechanistic details of the catalytic degradation of methylene blue by hydrogen peroxide in basic solution. The unexpected innocence of percarbonate. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115507] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Isa N, Mohamad Nor N, Wan Kamis WZ, Tan WK, Kawamura G, Matsuda A, Lockman Z. Anodized TiO2 nanotubes using Ti wire in fluorinated ethylene glycol with air bubbles for removal of methylene blue dye. J APPL ELECTROCHEM 2021. [DOI: 10.1007/s10800-021-01644-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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A (solvent-free) approach to metal-free photo-catalysts for methylene blue degradation. IRANIAN POLYMER JOURNAL 2021. [DOI: 10.1007/s13726-021-00957-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Liew ASY, Nguang SY, Minggu LJ, Tahir N, Moh PY. Graphene oxide incorporated amino‐functionalized iron terephthalate composite as a heterogeneous Fenton‐like catalyst. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202100183] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Aaron Shun Yao Liew
- Industrial Chemistry Programme, Faculty of Science and Natural Resources Universiti Malaysia Sabah Kota Kinabalu Sabah Malaysia
| | - Sing Yew Nguang
- Industrial Chemistry Programme, Faculty of Science and Natural Resources Universiti Malaysia Sabah Kota Kinabalu Sabah Malaysia
| | | | - Norini Tahir
- Industrial Chemistry Programme, Faculty of Science and Natural Resources Universiti Malaysia Sabah Kota Kinabalu Sabah Malaysia
| | - Pak Yan Moh
- Industrial Chemistry Programme, Faculty of Science and Natural Resources Universiti Malaysia Sabah Kota Kinabalu Sabah Malaysia
- Water Research Unit Faculty of Science and Natural Resources, Universiti Malaysia Sabah Kota Kinabalu Sabah Malaysia
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Abd-Elnaiem AM, Abdel-Rahim MA, Abdel-Latief AY, Mohamed AAR, Mojsilović K, Stępniowski WJ. Fabrication, Characterization and Photocatalytic Activity of Copper Oxide Nanowires Formed by Anodization of Copper Foams. MATERIALS 2021; 14:ma14175030. [PMID: 34501117 PMCID: PMC8433699 DOI: 10.3390/ma14175030] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 08/20/2021] [Accepted: 08/30/2021] [Indexed: 11/26/2022]
Abstract
In recent paper anodization of copper foams in 0.1 M K2CO3 is reported. Anodization was performed in the voltage range of 5–25 V and in all the cases oxides with a developed surface area were obtained. However, anodizing only at 20 and 25 V resulted in the formation of nanostruc-tures. In all the cases, the products of anodizing consisted of crystalline phases like cuprite (Cu2O), tenorite (CuO), parameconite (Cu4O3) as well as spertiniite (Cu(OH)2). Copper foams after ano-dizing were applied as catalysts in the photocatalytic decolorization of a model organic compound such as methylene blue. The highest photocatalytic activity was observed for samples anodized at 25 V and closely followed by samples anodized at 5 V. The anodized copper foams proved to be a useful material in enhancing the photocatalytic efficiency of organic dye decomposition.
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Affiliation(s)
- Alaa M. Abd-Elnaiem
- Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt; (M.A.A.-R.); (A.Y.A.-L.); (A.A.-R.M.)
- Academy of Scientific Research and Technology (ASRT) of the Arab Republic of Egypt, Cairo 11516, Egypt
- Correspondence: (A.M.A.-E.); (W.J.S.)
| | - Moustafa A. Abdel-Rahim
- Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt; (M.A.A.-R.); (A.Y.A.-L.); (A.A.-R.M.)
- Academy of Scientific Research and Technology (ASRT) of the Arab Republic of Egypt, Cairo 11516, Egypt
| | - Atta Y. Abdel-Latief
- Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt; (M.A.A.-R.); (A.Y.A.-L.); (A.A.-R.M.)
- Academy of Scientific Research and Technology (ASRT) of the Arab Republic of Egypt, Cairo 11516, Egypt
| | - Ahmed Abdel-Rahim Mohamed
- Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt; (M.A.A.-R.); (A.Y.A.-L.); (A.A.-R.M.)
- Academy of Scientific Research and Technology (ASRT) of the Arab Republic of Egypt, Cairo 11516, Egypt
| | - Kristina Mojsilović
- Faculty of Physics, University of Belgrade, Studentski trg 12–16, 11000 Belgrade, Serbia;
| | - Wojciech Jerzy Stępniowski
- Faculty of Advanced Technology and Chemistry, Institute of Materials Science & Engineering, Military University of Technology, Kaliskiego 2 Str., 00908 Warszawa, Poland
- Correspondence: (A.M.A.-E.); (W.J.S.)
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Immobilization of TiO2 Nanoparticles in Cement for Improved Photocatalytic Reactivity and Treatment of Organic Pollutants. Catalysts 2021. [DOI: 10.3390/catal11080938] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Non-point organic pollutants in stormwater are a growing problem in the urban environment which lack effective and efficient treatment technologies. Incorporation of conventional wastewater techniques within stormwater management practices could fundamentally change how stormwater quality is managed because contaminants can be degraded during stormwater transport or storage. This study investigated the photocatalytic reactivity of titanium dioxide functionalized with maleic anhydride (Ti-MAH) within cement pastes when compared to ordinary Portland cement. Preparation of Ti-MAH was performed by permanently bonding maleic anhydride to titanium in methanol, drying and powdering the residual material, and then inter-grinding the preparation with cement during mixing. When compared with OPC, the Ti-MAH cured cement paste is more reactive under a wider range of light wavelengths, possesses a higher band gap, sustains this heightened reactivity over multiple testing iterations, and treats organics effectively (>95% methylene blue removal). Amorphous silica within calcium-silica-hydrate, C-S-H, is theorized to bond to the powdered Ti-MAH during curing. Verification of silicon bonding to the titanium by way of MAH was demonstrated by FTIR spectra, SEM imagery, and XRD. Creating a sustainable and passive photocatalytic cement that precisely bonds silica to Ti-MAH is useful for organic contaminants in urban stormwater, but use can translate to other applications because Ti-MAH bonds readily with any amorphous silica such as glass materials, paints and coatings, optics, and LEDS, among many others.
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Igenepo John K, Abdul Adenle A, Timothy Adeleye A, Pearl Onyia I, Amune-Matthews C, Omorogie MO. Unravelling the effect of crystal dislocation density and microstrain of titanium dioxide nanoparticles on tetracycline removal performance. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138725] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Nemiwal M, Zhang TC, Kumar D. Recent progress in g-C 3N 4, TiO 2 and ZnO based photocatalysts for dye degradation: Strategies to improve photocatalytic activity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 767:144896. [PMID: 33636763 DOI: 10.1016/j.scitotenv.2020.144896] [Citation(s) in RCA: 92] [Impact Index Per Article: 30.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 12/26/2020] [Accepted: 12/26/2020] [Indexed: 05/27/2023]
Abstract
Water contamination by dyes is a matter of concern for human health and the environment. Various methods (membrane separation, coagulation and adsorption) have been explored to remove/degrade dyes. However, now the exploitation of semiconductor assisted materials using renewable solar energy has emerged as a potential candidate to resolve the issue. Although, single component photocatalysts (ZnO, TiO2, ZrO2) were experimented, due to their low efficiency and stability due to the high recombination rate electron-hole pair and inefficient visible light absorption, composites of semiconductor materials are being used. Semiconductor heterojunction systems are developed by coupling two or more semiconductor components. The synergistic effect of their properties, such as adsorption and improved charge carrier migration, is observed to increase overall stability. This review covers recent progress in advanced nanocomposite materials based on g-C3N4, TiO2 and ZnO used as photocatalysts with details of enhancing the photocatalytic properties by heterojunctions, crystallinity and doping. The conclusion at the end displays a summary, research gaps and future outlook. A holistic analysis of recent progress to demonstrate the efficient heterojunctions for photodegradation with optimal conditions, this review will be helpful for the development of efficient heterostructured systems for photodegradation. This review covers references from the year 2017-2020.
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Affiliation(s)
- Meena Nemiwal
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur 302017, India.
| | - Tian C Zhang
- Department of Civil & Environmental Engineering, University of Nebraska-Lincoln, Peter Kiewit Institute, Omaha, NE 68182-0178, USA
| | - Dinesh Kumar
- School of Chemical Sciences, Central University of Gujarat, Gandhinagar 382030, India.
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Yoon J, Oh SG. Synthesis of amine modified ZnO nanoparticles and their photocatalytic activities in micellar solutions under UV irradiation. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2021.01.043] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Photocatalytic Porous Silica-Based Granular Media for Organic Pollutant Degradation in Industrial Waste-Streams. Catalysts 2021. [DOI: 10.3390/catal11020258] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Photocatalytic treatment of organic contaminants in industrial wastewaters has gained interest due to their potential for effective degradation. However, photocatalytic slurry reactors are hindered by solution turbidity, dissolved salt content, and absorbance of light. Research presented here introduces the development and application of a novel, photocatalytic, porous silica-based granular media (SGM). SGM retains the cross-linked structure developed during synthesis through a combination of foaming agent addition and activation temperature. The resultant media has a high porosity of 88%, with a specific surface area of ~150 m2/gram. Photocatalytic capabilities are further enhanced as the resultant structure fixes the photocatalyst within the translucent matrix. SGM is capable of photocatalysis combined with diffusion of nucleophiles, electrophiles, and salts from pore space. The photocatalytic efficiencies of SGM at various silica contents were quantified in batch reactors using methylene blue destruction over time and cycles. Methylene blue concentrations of 10 mg/L were effectively degraded (>90%) within 40 min. This effectiveness was retained over multiple cycles and various methylene blue concentrations. SGM is a passive and cost-effective granular treatment system technology which can translate to other organic contaminants and industrial processes.
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The Efficient Removal of Methylene Blue Dye Using CuO/PET Nanocomposite in Aqueous Solutions. Catalysts 2021. [DOI: 10.3390/catal11020241] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The present research investigates the application of the green method to produce nanocomposites. The CuO/PET fiber nanocomposite can be prepared in two ways. The first way involves the application of the electrospinning technique by which waste plastic cups of polyethylene terephthalate (PET) are converted into nanofibers. In the second way, the copper nanoparticle (CuONPs) is synthesized with the natural capped plant extract of sumac (Rhus Coriaria L., family Anacardiaceae) and the CuONPs are then combined as a filler with the PET nanofiber using a cross-linked solvent. The X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), energy dispersion spectroscopy (EDS), and map elements distribution can be applied to investigate the surface modification and alteration of the composite nanofiber morphology. The collected data show that the produced CuO/PET nanocomposites have a high surface area, well distribution of elements, magnificent shape, and stable dispersion state. Furthermore, the CuO/PET nanocomposites are considered as an efficient photocatalytic removal of the toxic methylene blue dye (MB) in aqueous solutions. The results of the present study demonstrate that the photocatalytic efficiency for removing MB dye is achieved in a short time using a low-intensity irradiation ultraviolet light.
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Zhu J, Jian Y, Long D, Wang H, Zeng Y, Li J, Xiao R, Pu S. Degradation of ammonia gas by Cu 2O/{001}TiO 2 and its mechanistic analysis. RSC Adv 2021; 11:3695-3702. [PMID: 35424286 PMCID: PMC8694158 DOI: 10.1039/d0ra10431k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 01/11/2021] [Indexed: 11/21/2022] Open
Abstract
A heterogeneous composite catalyst Cu2O/{001}TiO2 was successfully prepared by the impregnation-reduction method. With ammonia as the target pollutant, the degradation performance and degradation mechanism analysis of the prepared composite catalyst were investigated, providing technology for the application of photocatalysis technology in ammonia treatment reference. The catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), specific surface area (BET), fluorescence spectrum (PL) and UV-visible absorption (UV-Vis). The results showed: compared with single {001}TiO2, the addition of Cu2O to form a composite catalyst can reduce the recombination of electron-hole pairs, resulting in increased absorption intensity in the visible light range, decreased band gap width, and finally improved the degradation performance. When the composite ratio is 1 : 10, the specific surface area is the largest, which is 72.51 m2 g-1, and the degradation rate of ammonia is also the highest maintained at 85%. After repeated use for 5 times, the degradation rate of ammonia decreases gradually due to the loss of catalyst and photo-corrosion. In the whole reaction process, surface adsorbed water and associated hydroxyl radical participate in the ammonia degradation reaction, and finally form free hydroxyl radical and NO3 -. It provides some theoretical support for ammonia gas treatment, which is of great significance to protect the environment.
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Affiliation(s)
- Jiaming Zhu
- Chongqing Academy of Animal Sciences Chongqing 402460 China .,Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture Chongqing 402460 China
| | - Yue Jian
- Chongqing Academy of Animal Sciences Chongqing 402460 China .,Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture Chongqing 402460 China
| | - Dingbiao Long
- Chongqing Academy of Animal Sciences Chongqing 402460 China .,Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture Chongqing 402460 China
| | - Hao Wang
- Chongqing Academy of Animal Sciences Chongqing 402460 China .,Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture Chongqing 402460 China
| | - Yaqiong Zeng
- Chongqing Academy of Animal Sciences Chongqing 402460 China .,Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture Chongqing 402460 China
| | - Jigang Li
- Chongqing Academy of Animal Sciences Chongqing 402460 China
| | - Rong Xiao
- Chongqing Academy of Animal Sciences Chongqing 402460 China
| | - Shihua Pu
- Chongqing Academy of Animal Sciences Chongqing 402460 China .,Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture Chongqing 402460 China
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Rattan Paul D, Nehra SP. Graphitic carbon nitride: a sustainable photocatalyst for organic pollutant degradation and antibacterial applications. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:3888-3896. [PMID: 32519096 DOI: 10.1007/s11356-020-09432-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Accepted: 05/25/2020] [Indexed: 06/11/2023]
Abstract
Recently, graphitic carbon nitride (GCN) has been found to be of great interest in various sustainable applications. In this study, a simple preparation method using urea was utilized to synthesize GCN. In order to understand various morphological, structural, and optical aspects of the as-prepared sample, GCN was characterized using X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, Brunauere-Emmette-Teller (BET), scanning electron microscopy (SEM), and diffused reflectance spectra (DRS) analysis. The visible-light-driven photocatalytic activity of prepared GCN was analyzed for various cationic dyes (Crystal violet, rose bengal, rhodamine B, auramine O, methylene blue) and anionic dyes (phenol red, xylenol orange, cresol red, methyl orange). The calculated efficiencies of degradation and values of apparent rate constant for all dye samples suggested that cationic dyes are more actively degraded using GCN than anionic dyes. In addition, GCN was further analyzed for its splendid antibacterial activity against pathogenic bacteria (Klebsiella pneumonia and Escherichia coli). The synthesized photocatalyst holds a bright scope for the efficient remediation of organic pollutants and bacterial disinfection in wastewater. Graphical abstract.
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Affiliation(s)
- Devina Rattan Paul
- Center of Excellence for Energy and Environmental Studies, Deenbandhu Chhotu Ram University of Science and Technology, Murthal, 131039, India.
| | - Satya Pal Nehra
- Center of Excellence for Energy and Environmental Studies, Deenbandhu Chhotu Ram University of Science and Technology, Murthal, 131039, India.
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Double-Inverse-Opal-Structured Particle Assembly as a Novel Immobilized Photocatalytic Material. MATERIALS 2020; 14:ma14010028. [PMID: 33374675 PMCID: PMC7793507 DOI: 10.3390/ma14010028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 12/10/2020] [Accepted: 12/17/2020] [Indexed: 12/04/2022]
Abstract
Immobilization of photocatalysts on supports is an important method of adding highly active photocatalysts to a continuous flowing system without the need for photocatalyst recovery. However, direct immobilization prevents exposure to all photocatalytically active surfaces. Therefore, to immobilize particulate photocatalysts, while exposing the photocatalytic surface to organic pollutant water in a continuous flowing system, in this study, we employed double-inverse-opal (DIO) with periodically arranged, interconnected macropores, each containing a single photocatalytic particle. Increasing the macropore size successfully enhanced the decomposition rate of organic dye due to the high diffusion rate of dye molecules in the macropores of thin DIOs. However, an excessive increase in macropore size lowered the decomposition rate of dye molecules because an increase in DIO thickness caused the attenuation of light used to excite the photocatalytic particles. This study presents novel, immobilized photocatalytic DIO-structured particles that can be employed in continuous flowing reaction systems by tuning the photocatalytic particle size, macropore size, and DIO thickness.
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Facile One-Pot Biogenic Synthesis of Cu-Co-Ni Trimetallic Nanoparticles for Enhanced Photocatalytic Dye Degradation. Catalysts 2020. [DOI: 10.3390/catal10101138] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Biomolecules from plant extracts have gained significant interest in the synthesis of nanoparticles owing to their sustainable properties, cost efficiency, and environmental wellbeing. An eco-friendly and facile method has been developed to prepare Cu-Co-Ni trimetallic nanoparticles with simultaneous bio-reduction of Cu-Co-Ni metal precursors by aqueous extract of oregano (Origanum vulgare) leaves. Dramatic changes in physicochemical properties of trimetallic nanoparticles occur due to synergistic interactions between individual metal precursors, which in turn outclass the properties of corresponding monometallic nanoparticles in various aspects. The as biosynthesized Cu-Co-Ni trimetallic nanoparticles were initially analyzed using ultraviolet (UV)–visible spectroscopy. The morphology, structure, shape, and size of biosynthesized trimetallic nanoparticles were confirmed by transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X-ray diffraction (XRD) spectroscopy. The elemental analysis was carried out by energy-dispersive X-ray (EDX) spectroscopy. Fourier transform infrared (FTIR) microscopy was carried out to explain the critical role of the biomolecules in the Origanum vulgare leaf extract as capping and stabilizing agents in the nanoparticle formation. Additionally, simultaneous thermogravimetric analysis (TGA) and differential thermogravimetry (DTG) analysis was also performed to estimate the mass evaluation and rate of the material weight changes. The photocatalytic activity of as biosynthesized trimetallic nanoparticles was investigated towards methylene blue (MB) dye degradation and was found to be an efficient photocatalyst for dye degradation. Kinetic experiments have shown that photocatalytic degradation of MB dye followed pseudo-first-order kinetics. The mechanism of the photodegradation process of biogenic Cu-Co-Ni trimetallic nanoparticles was also addressed.
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Visible Light Responsive Strontium Carbonate Catalyst Derived from Solvothermal Synthesis. Catalysts 2020. [DOI: 10.3390/catal10091069] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A single crystalline phase of strontium carbonate (SrCO3) was successfully obtained from solvothermal treatments of hydrated strontium hydroxide in ethanol (EtOH) at 100 °C for 2 h, using specific Sr:EtOH mole ratios of 1:18 or 1:23. Other solvothermal treatment times (0.5, 1.0 and 3 h), temperatures (80 and 150 °C) and different Sr:EtOH mole ratios (1:13 and 1:27) led to formation of mixed phases of Sr-containing products, SrCO3 and Sr(OH)2 xH2O. The obtained products (denoted as 1:18 SrCO3 and 1:23 SrCO3), containing a single phase of SrCO3, were further characterized in comparison with commercial SrCO3, and each SrCO3 material was employed as a photocatalyst for the degradation of methylene blue (MB) in water under visible light irradiation. Only the 1:23 SrCO3 sample is visible light responsive (Eg = 2.62 eV), possibly due to the presence of ethanol in the structure, as detected by thermogravimetric analysis. On the other hand, the band gap of 1:18 SrCO3 and commercial SrCO3 are 4.63 and 3.25 eV, respectively, and both samples are UV responsive. The highest decolourisation efficiency of MB solutions was achieved using the 1:23 SrCO3 catalyst, likely due to its narrow bandgap. The variation in colour removal results in the dark and under visible light irradiation, with radical scavenging tests, suggests that the high decolourisation efficiency was mainly due to a generated hydroxyl-radical-related reaction pathway. Possible degradation products from MB oxidation under visible light illumination in the presence of SrCO3 are aromatic sulfonic acids, dimethylamine and phenol, as implied by MS direct injection measurements. Key findings from this work could give more insight into alternative synthesis routes to tailor the bandgap of SrCO3 materials and possible further development of cocatalysts and composites for environmental applications.
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Synthesis of Superior Visible-Light-Driven Nanophotocatalyst Using High Surface Area TiO2 Nanoparticles Decorated with CuxO Particles. Catalysts 2020. [DOI: 10.3390/catal10080872] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
This work provides an alternate unique simple methodology to design and synthesize chemically modified nanophotocatalyst based on high surface area TiO2 nanoparticles that can be used efficiently for the photodegradation of organic pollutants under normal visible light rather than complicated UV irradiation. In this study, dual visible light and UV-driven nanophotocatalysts were synthesized via wet chemistry procedures using high surface area TiO2 nanoparticles functionalized with (3-Aminopropyl) trimethoxysilane and attached chemically to the CuXO to improve the charge separation and maintain the non-charge recombination. The successful modification of the TiO2 nanoparticles and the formation of the TiO2-NH2-CuxO nanophotocatalyst were confirmed using different characterization techniques, and the results revealed the synthesis of high surface area TiO2 nanoparticles, and their chemical modification with an amino group and further decoration with copper to produce TiO2-NH2-CuxO nanophotocatalyst. The photocatalytic activity of TiO2 and TiO2-NH2-CuxO nanophotocatalyst were evaluated using methylene blue (MB) dye; as an example of organic pollutants. The resulting TiO2-NH2-CuxO nanophotocatalyst exhibited superior photocatalytic activity for the degradation of MB dye under visible light irradiation, due to the reduction in the energy bandgap. The degradation of the MB dye using the TiO2-NH2-CuxO nanophotocatalyst was investigated using LC-MS, and the results revealed that the hydroxyl free radical is mainly responsible for the cleavage and the degradation of the MB dye.
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Tuneable Functionalization of Glass Fibre Membranes with ZnO/SnO2 Heterostructures for Photocatalytic Water Treatment: Effect of SnO2 Coverage Rate on the Photocatalytic Degradation of Organics. Catalysts 2020. [DOI: 10.3390/catal10070733] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The construction of a ZnO/SnO2 heterostructure is considered in the literature as an efficient strategy to improve photocatalytic properties of ZnO due to an electron/hole delocalisation process. This study is dedicated to an investigation of the photocatalytic performance of ZnO/SnO2 heterostructures directly synthesized in macroporous glass fibres membranes. Hydrothermal ZnO nanorods have been functionalized with SnO2 using an atomic layer deposition (ALD) process. The coverage rate of SnO2 on ZnO nanorods was precisely tailored by controlling the number of ALD cycles. We highlight here the tight control of the photocatalytic properties of the ZnO/SnO2 structure according to the coverage rate of SnO2 on the ZnO nanorods. We show that the highest degradation of methylene blue is obtained when a 40% coverage rate of SnO2 is reached. Interestingly, we also demonstrate that a higher coverage rate leads to a full passivation of the photocatalyst. In addition, we highlight that 40% coverage rate of SnO2 onto ZnO is sufficient for getting a protective layer, leading to a more stable photocatalyst in reuse.
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Nair SB, John K A, Joseph JA, Babu S, Shinoj VK, Remillard SK, Shaji S, Philip RR. Influence of p-n junction mechanism and alumina overlayer on the photocatalytic performance of TiO 2 nanotubes. NANOTECHNOLOGY 2020; 31:275403. [PMID: 32176870 DOI: 10.1088/1361-6528/ab8043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Modified hybrid structures of TiO2 nanotubes (TONT), p-Al doped TONT/n-TONT with an additional overlayer of alumina, are constructed to achieve 99.57% photodegradation of the stable organic pollutant methylene blue (MB) within 180 min, a degradation rate 17 times higher than pure TONTs. The anodization at three different temperatures 2, 28 and 40 °C followed by impregnation of Al is used for their preparation. The analyses of structure, chemical composition and morphology are completed using x-ray diffraction, x-ray photoelectron spectroscopy (XPS) and high resolution transmission microscopy, respectively, Rutherford back scattering and field emission scanning electron microscopy confirm the formation of the hybrid structure. This structure exhibits the highest photodegradation rate with TONT based catalysts to date for MB blue, by enhancing the electron-hole separation, the absorption of visible photons and the adsorption sites for the pollutant. The optical data coupled with valence band XPS is used for elucidating the energy band structure of the p-n junctions and to gain insight into the effect of the junction mechanism on photoactivity. The rectification ratios of the impregnated p-n junctions, determined by current-voltage measurements, are found to vary from 102 to 106.
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Affiliation(s)
- Sinitha B Nair
- Thin Film Research Lab, Union Christian College, Aluva, Kerala 683102, India. Sree Sankara College, Kalady, Kerala 683574, India
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Dey PC, Das R. Enhanced photocatalytic degradation of methyl orange dye on interaction with synthesized ligand free CdS nanocrystals under visible light illumination. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 231:118122. [PMID: 32044711 DOI: 10.1016/j.saa.2020.118122] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 01/30/2020] [Accepted: 02/01/2020] [Indexed: 06/10/2023]
Abstract
Methyl orange is widely used dye in textile industry and later, it becomes the major component of industrial waste and pollutes different water body. So, its degradation is required especially in the case of drinking water. Here, chemically synthesized ligand free CdS nanocrystals have been utilized as a photocatalyst to degrade this dye in water. The mean size of the CdS nanocrystal has been found to be 7 nm approximately from TEM analysis, and SAED pattern shows that these are crystalline in nature. Further, the XRD patterns confirms the cubic structure of CdS nanoparticles and mean size calculated from XRD analysis matches well with the obtained size from TEM study. NMR study clearly verifies that CdS nanocrystals are ligand free stable nanoparticles. Due to this absence of ligand on the surface of CdS nanocrystals, a much enhanced MO degradation has been observed, as the e--h+ pair in the CdS and subsequent generation of free radicals such as hydroxyl, can efficiently oxidize the organic material MO and therefore, degrade this pollutant faster under visible light illumination. The degradation efficiency is found to be 95% after 300 min of illumination, which is much better than the other similar reports.
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Affiliation(s)
- Pijush Ch Dey
- Nano-Physics & Nanotechnology Research Lab, Dept. of Physics, Tripura University (A Central University), Suryamaninagar, Agartala, Tripura, India
| | - Ratan Das
- Nano-Physics & Nanotechnology Research Lab, Dept. of Physics, Tripura University (A Central University), Suryamaninagar, Agartala, Tripura, India.
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Dhanalakshmi M, Lakshmi Prabavathi S, Saravanakumar K, Filip Jones B, Muthuraj V. Iridium nanoparticles anchored WO3 nanocubes as an efficient photocatalyst for removal of refractory contaminants (crystal violet and methylene blue). Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137285] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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