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Albukhari SM, Al-Hajji LA, Ismail AA. Minimizing CO 2 emissions by photocatalytic CO 2 reduction to CH 3OH over Li 2MnO 3/WO 3 heterostructures under visible illumination. ENVIRONMENTAL RESEARCH 2024; 241:117573. [PMID: 37956755 DOI: 10.1016/j.envres.2023.117573] [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: 09/18/2023] [Revised: 10/16/2023] [Accepted: 10/28/2023] [Indexed: 11/15/2023]
Abstract
Photocatalytic CO2 reduction to valuable fuels has proved to be a favourable process to produce renewable energy and reduce CO2 emissions, which mostly depends on designing effective photocatalysts with the rapid separation rate of charge carriers. In this contribution, mesoporous n-n heterojunction Li2MnO3/WO3 nanocomposites were designed via a simplistic sol-gel process for CO2 reduction utilizing visible illumination (λ > 420 nm). XRD and TEM measurements confirmed the synthesized Li2MnO3/WO3 nanocomposite is a monoclinic structure, and its particle size is 25 ± 5 nm. The obtained Li2MnO3/WO3 exhibited narrower bandgap energy (1.74 eV), larger surface area (212 m2g-1), exceedingly visible absorbing, and lower recombination of electron and hole. The yield of CH3OH was determined about 198, 871, 1140, 1550 and 1570 mmolg-1 for bare WO3 and 5%, 10%, 15% and 20% Li2MnO3/WO3 nanocomposites, respectively. These results evidenced that the 15% Li2MnO3/WO3 photocatalyst exhibited the best reduction ability compared to other nanocomposites. The CO2 reduction over 15% Li2MnO3/WO3 photocatalyst achieved a maximal CO2 conversion with the substantially boosted CH3OH, i.e., 1550 mmolg-1 after 9 h, which was enhanced 7.8 folds great than of WO3 NPs. Mesoporous Li2MnO3/WO3 nanocomposites, in comparison with bare WO3 NPs, created more active sites for facilitating CO2 and had a specific electric field to more effectively separate charge carriers. The Li2MnO3/WO3 photocatalyst has superior photostability during the continuous reduction of CO2 for 45 h with no remarkable decrease. The possible direct S-scheme mechanism for electron transfer over Li2MnO3/WO3 photocatalyst with the enhanced CO2 reduction ability was discussed. The present work demonstrates an avenue for building highly effective heterostructure photocatalysts in solar-energy-induced potential applications.
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Affiliation(s)
- Soha M Albukhari
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Kingdom of Saudi Arabia.
| | - L A Al-Hajji
- Nanotechnology and Advanced Materials Program, Energy & Building Research Center, Kuwait Institute for Scientific Research (KISR), P.O. Box 24885, Safat, 13109, Kuwait
| | - Adel A Ismail
- Nanotechnology and Advanced Materials Program, Energy & Building Research Center, Kuwait Institute for Scientific Research (KISR), P.O. Box 24885, Safat, 13109, Kuwait.
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Kolekar AG, Nille OS, Koparde SV, Patil AS, Waghmare RD, Sohn D, Anbhule PV, Kolekar GB, Gokavi GS, More VR. Green, facial zinc doped hydrothermal synthesis of cinnamon derived fluorescent carbon dots (Zn-Cn-CDs) for highly selective and sensitive Cr 6+ and Mn 7+ metal ion sensing application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 304:123413. [PMID: 37741103 DOI: 10.1016/j.saa.2023.123413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/04/2023] [Accepted: 09/13/2023] [Indexed: 09/25/2023]
Abstract
Carbon dots have demonstrated a great potential as luminescent nanoparticles in energy, drug delivery, sensors, and various biomedical applications as well as environmental pollutants and water analysis. Although, such nanoparticles appear to exhibit low toxicity compared to other semiconductor and metal based luminescent nanomaterials. Today, we know that toxicity of carbon dots (CDs) strongly depends on the protocol of fabrication. The various dopants or heteroatoms have been used to enhance the optical and physicochemical properties. In this work, zinc doped aqueous fluorescent Zn-Cn-CDs have been synthesized from cinnamon by hydrothermal synthesis method. The synthesized Zn-Cn-CDs were confirmed for their physicochemical properties by using various characterization techniques viz. UV-Vis. and spectrofluorometer for optical properties, Fourier transform infrared spectroscopy (FTIR) and XRD, as well as TEM and XPS, was done for morphological and chemical analysis. The successfully synthesized Zn-Cn-CDs showed outstanding optical performance for metal ion sensing applications. The developed heteroatom doped Zn-Cn-CDs as a fluorescent probe exhibited higher selectivity and sensitivity for Cr6+ and Mn7+ metal ions. The obtained results showed a better linear range with excellent limit of detection (LOD) 3.97 µg/mL and 2.05 µg/mL for Cr6+ and Mn7+ metal ions respectively. The low cost, simple and highly fluorescent probe can be effectively applicable for development of environmental pollutants sensing purposes.
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Affiliation(s)
- Akanksha G Kolekar
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, Maharashtra, India
| | - Omkar S Nille
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, Maharashtra, India
| | - Sneha V Koparde
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, Maharashtra, India
| | - Akshay S Patil
- Department of Chemistry and Research Institute for Convergence of Basic Science, Hanyang University, Seoul Campus, Seoul, South Korea
| | - Ravindra D Waghmare
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, Maharashtra, India
| | - Daewon Sohn
- Department of Chemistry and Research Institute for Convergence of Basic Science, Hanyang University, Seoul Campus, Seoul, South Korea
| | - Prashant V Anbhule
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, Maharashtra, India
| | - Govind B Kolekar
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, Maharashtra, India
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Wen J, Wang G, Li X, Liu W, Zhan H, Yang Y, Li T, Zheng W. Preparation of Oxygen-Doping Nongraphitic Carbon Nitride via Efficiency Exfoliation for the Application of Photocatalytic Degradation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:11851-11863. [PMID: 37556777 DOI: 10.1021/acs.langmuir.3c01620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
E-OLCN photocatalyst was synthesized by oxygen doping of low molecular weight carbon nitride (LCN) with ethanol solvent stripping. The enhanced light absorption, fast electron transport rate, and photogenerated carrier separation efficiency of E-OLCN leads to the excellent photocatalytic degradation performance compared with the original materials. The synergistic effect of oxygen doping and ethanol solvent stripping plays a significant role for the modulation of electronic and structural properties of the prepared catalysts. Methyl orange (MO) and rhodamine B (RhB) are chosen as typical pollutants for the application of photocatalytic degradation. The E-OLCN sample exhibits outstanding photocatalytic degradation performance, where the rate constant k (1 × 10-2 min-1) of E-OLCN (1.68) is 2.9 times than that of O-LCN (0.58) and 8.8 times than that of pristine LCN (0.19) for MO. Moreover, modulated E-OLCN shows good stability after cycling experiments and the activity still achieved 90%. The detailed mechanism for MO degradation was proposed with the technical support of liquid chromatography-mass spectrometry (LC-MS) and electron spin resonance (EPR). The superoxide radical (·O2-) is the main active species and the MO molecule could be decomposition completely.
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Affiliation(s)
- Jiantong Wen
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, P. R. China
| | - Gang Wang
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, P. R. China
| | - Xiang Li
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, P. R. China
| | - Wanyi Liu
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, P. R. China
| | - Haijuan Zhan
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, P. R. China
| | - Yuqing Yang
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, P. R. China
| | - Ting Li
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, P. R. China
| | - Wenhui Zheng
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, P. R. China
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Shinde SB, Bhosale SR, Birajdar NB, Gore AH, Kolekar GB, Kolekar SS, Mandake AD, Anbhule PV. Construction of Waste Chalk Powder into mpg-C 3N 4-CaSO 4 as an Efficient Photocatalyst for Dye Degradation under UV-Vis Light and Sunlight. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:6324-6336. [PMID: 37093655 DOI: 10.1021/acs.langmuir.2c03362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
In this article, we present the synthesis of calcium sulfate nanoparticles (CaSO4 NPs) from waste chalk powder by the calcination method. These CaSO4 NPs were utilized for the construction of a mesoporous graphitic carbon nitride-calcium sulfate (mpg-C3N4-CaSO4) photocatalyst. Synthesized materials were confirmed by several characterization techniques. The photocatalytic performance of the synthesized samples was tested by the degradation of methylene blue (MB) in the presence of both UV-vis light and sunlight. The efficiency of photocatalytic degradation of MB dye using the optimized mpg-C3N4-CaSO4-2 composite reached 91% within 90 min in the presence of UV-vis light with superb photostability and recyclability after five runs compared to individual mpg-C3N4 and CaSO4 NPs and reached 95% within 120 min under sunlight. Histotoxicological studies on fish liver and ovary indicated that the dye containing the solution damaged the structure of the liver and ovary tissues, whereas the photodegraded solution of MB was found to be less toxic and caused negligible alterations in their typical structure similar to the control group.
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Affiliation(s)
- Sachin B Shinde
- Medicinal Material Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur 416004, Maharashtra, India
| | - Sneha R Bhosale
- Medicinal Material Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur 416004, Maharashtra, India
| | - Nagesh B Birajdar
- Department of Zoology, Shivaji University, Kolhapur 416004, Maharashtra, India
| | - Anil H Gore
- Tarsadia Institute of Chemical Science, Uka Tarsadia University, Bardoli 394350, Gujarat, India
| | - Govind B Kolekar
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur 416004, Maharashtra, India
| | - Sanjay S Kolekar
- Analytical Chemistry and Material Science Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur 416004, Maharashtra, India
| | - Ajinkya D Mandake
- Department of Chemistry, Yashwantrao Mohite College of Arts, Science and Commerce, Pune 411038, Maharashtra, India
| | - Prashant V Anbhule
- Medicinal Material Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur 416004, Maharashtra, India
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Nille OS, Patel RS, Borate BY, Babar SS, Kolekar GB, Gore AH. One-step in-situ sustainable synthesis of magnetic carbon nanocomposite from corn comb (MCCC): agricultural biomass valorisation for pollutant abatement in wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:38425-38442. [PMID: 36580255 DOI: 10.1007/s11356-022-24847-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 12/14/2022] [Indexed: 06/17/2023]
Abstract
This study explored a novel, eco-friendly, sustainable, low-cost, and abundantly available corn comb (CC) agricultural biomass waste-derived one-step in-situ synthesis of magnetic carbon (MCCC) as an efficient adsorbent for water decontamination applications. Herein, we developed a robust and easily separable MCCC by carbonization of Fe(NO3)3.9H2O single iron salt-soaked CC at 500 °C for 5 h. The as-synthesized MCCC was confirmed for their physicochemical properties by various characterization techniques viz. scanning electron microscopy (SEM), high-resolution transmission emission microscopy (HR-TEM), energy dispersive X-ray (EDX), thermogravimetric analysis (TGA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), surface area measurements by Brunauer-Emmett-Teller (BET) study, Raman analysis, and magnetic behavior by VSM analysis. The adsorption properties of MCCC on prototypical pollutant methylene blue (MB) was monitored depending on the effect of pH, adsorbent dose, contact time, and varying concentrations of MB. Especially, the π-π interactions played important role in the adsorption of MB at acidic pH (pH = 4). The MCCC displayed a maximum uptake capacity of 120.73 ± 0.63 mg/g toward MB. The Langmuir, Freundlich, and Temkin adsorption isotherm models were fitted with determined coefficient (R2) values of 0.99, 0.95, and 0.96 respectively. The kinetics of the adsorption process was well fitted with a pseudo-second-order model (R2 = 0.99). Most significantly, the as-designed easily separable, and reusable adsorbent, MCCC was effectively applied for the abatement of pollutants, different kinds of dyes, pesticides, and industrial wastewater samples. The sustainable, affordable, and waste to wealth-based MCCC with a simple synthesis methodology can be fruitfully applicable for environmental remediation and water decontamination.
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Affiliation(s)
- Omkar S Nille
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, 416004, MS, India
| | - Rahul S Patel
- Tarsadia Institute of Chemical Science, UKA Tarsadia University, Bardoli, 394350, Gujarat, India
| | - Bhagyashree Y Borate
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, 416004, MS, India
| | - Santosh S Babar
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, 416004, MS, India
| | - Govind B Kolekar
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, 416004, MS, India
| | - Anil H Gore
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, 416004, MS, India.
- Tarsadia Institute of Chemical Science, UKA Tarsadia University, Bardoli, 394350, Gujarat, India.
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Shinde SB, Dhengale SD, Nille OS, Jadhav SS, Gore AH, Bhosale TR, Birajdar NB, Kolekar SS, Kolekar GB, V Anbhule P. Template free synthesis of mesoporous carbon from fire cracker waste and designing of ZnO-Mesoporous carbon photocatalyst for dye (MO) degradation. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.110242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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