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Xing R, Gong X, Gao Z, Yang J, Zhang K, Li Y, Ge X, Pan G, Jia L, Xie H, Xiong S. Supercapacitor Performance of Sulfonyldibenzene Derivative-Functionalized Graphene Aerogel. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:11571-11581. [PMID: 38779964 DOI: 10.1021/acs.langmuir.4c00758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
3D aerogels incorporating functionalized reduced graphene oxide (SUL/rGO) were prepared as a hydrothermal method utilizing graphene oxide (GO) and a sulfonyldibenzene derivative (SUL) as raw materials. The aromatic compound SUL, which contains hydroxyl and sulfonyl groups, was bonded to reduced graphene oxide (rGO) through π-π connections. The obtained composite material exhibited porosity within its structure with improved hydrophilicity, along with excellent electrochemical characteristics. This improvement was ascribed to the specific rGO structure, as well as the pseudocapacitance inherent in SUL, both of which synergistically contribute to improvement in the characteristics of the prepared electrode materials. Also, an analysis was performed employing density functional theory from which the density of states and adsorption energy of SUL on the surface of rGO were computed to further investigate the charge storage process within the prepared composite. The prepared SUL/rGO-2 electrode exhibited the highest specific capacitance value of 388 F/g at a current density equal to 1 A/g. The constructed symmetrical supercapacitor, SUL/rGO-2//SUL/rGO-2, attained an energy density value of 14.55 Wh/kg at a power density equal to 350 W/kg with an exceptional galvanostatic charge-discharge (GCD) cyclic stability equal to 91% following 10 000 cycles. Therefore, this review presents a novel functionalized graphene-based material incorporating hydroxyl and sulfonyl groups, which holds promise in future energy storage applications.
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Affiliation(s)
- Ruiguang Xing
- School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, P. R. China
| | - Xiaobin Gong
- School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, P. R. China
| | - Zhe Gao
- School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, P. R. China
| | - Jingjing Yang
- School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, P. R. China
| | - Kaiqi Zhang
- School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, P. R. China
| | - Yanan Li
- School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, P. R. China
| | - Xin Ge
- School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, P. R. China
| | - Gaofei Pan
- School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, P. R. China
| | - Lina Jia
- School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, P. R. China
| | - Haijiao Xie
- Hangzhou Yanqu Information Technology Co., Ltd., Hangzhou 310003, P. R. China
| | - Shutao Xiong
- Chongqing Special Equipment Inspection and Research Institute, Chongqing 401120, P. R. China
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2
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Meena S, Sethi M, Saini S, Kumar K, Saini P, Meena S, Kashyap S, Yadav M, Meena ML, Dandia A, Nirmal NK, Parewa V. Molecular surface-dependent light harvesting and photo charge separation in plant-derived carbon quantum dots for visible-light-driven OH radical generation for remediation of aromatic hydrocarbon pollutants and real wastewater. J Colloid Interface Sci 2024; 660:756-770. [PMID: 38271811 DOI: 10.1016/j.jcis.2024.01.079] [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: 10/02/2023] [Revised: 01/09/2024] [Accepted: 01/11/2024] [Indexed: 01/27/2024]
Abstract
Despite the growing emphasis on eco-friendly nanomaterials as energy harvesters, scientists are actively searching for metal-free photocatalysts to be used in environmental remediation strategies. Developing renewable resource-based carbon quantum dots (CQDs) as the sole photocatalyst to harvest visible light for efficient pollutant degradation is crucial yet challenging, particularly for addressing the escalating issue of water deterioration. Moreover, the photocatalytic decomposition of H2O2 under visible light irradiation remains an arduous task. Based on this, we designed two types of CQDs, C-CQDs (carboxylic-rich) and A-CQDs (amine-rich) with distinct molecular surfaces. Owing to the higher amount of upward band bending induced by amine-rich molecular surface, A-CQDs efficiently harvest the visible light and prevent recombination kinetics resulting in prolonged lifetimes (25 ps), and augmented charge carrier density (35.7 × 1018) of photoexcited charge carriers. A-CQDs enabled rapid visible-light-driven photolysis of H2O2 (k = 0.058 min-1) and produced higher quantity of •OH radicals (0.158 μmol/sec) for the mineralization of petroleum waste, BETX (i.e. Benzene, Ethylbenzene, Toluene and Xylene) (k = 0.017-0.026 min-1) and real textile wastewater (k = 0.026 min-1). To assess comparative toxicities of both remediated and non-remediated real wastewater samples in a time and dose depended manner, Drosophila melanogaster was used as a model organism. The findings unequivocally demonstrate the potential of remediated wastewater for watering urban forestry.
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Affiliation(s)
- Savita Meena
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India
| | - Mukul Sethi
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India
| | - Surendra Saini
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India
| | - Krishan Kumar
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India
| | - Pratibha Saini
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India; Friedrich Schiller Univ Jena, Inst Anorgan & Analyt Chem, Humboldt Str 8, D-07743 Jena, Germany
| | - Swati Meena
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India
| | - Sunidhi Kashyap
- Centre for Advanced Studies, Department of Zoology, University of Rajasthan, Jaipur, India
| | - Monika Yadav
- Centre for Advanced Studies, Department of Zoology, University of Rajasthan, Jaipur, India
| | - Mohan Lal Meena
- Department of Chemical Engineering, National Institute of Technology Karnataka, Surathkal, Mangaluru 575025, India
| | - Anshu Dandia
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India
| | - Naresh Kumar Nirmal
- Centre for Advanced Studies, Department of Zoology, University of Rajasthan, Jaipur, India
| | - Vijay Parewa
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India.
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Jayanayak GM, Ganalu R, Shashikanth, Ukkund SJ, Ahmed S, AlSubih M, Islam S. Studies on the Removal of Malachite Green from Its Aqueous Solution Using Water-Insoluble β-Cyclodextrin Polymers. ACS OMEGA 2024; 9:10132-10145. [PMID: 38463288 PMCID: PMC10918832 DOI: 10.1021/acsomega.3c06504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 02/02/2024] [Accepted: 02/08/2024] [Indexed: 03/12/2024]
Abstract
The rising global pollution of natural waters by dyes has brought to light the need for adaptable and efficient removal techniques. To create water-insoluble β-cyclodextrin (β-CD) polymers like CA/-CD, TA/-CD, and MA/-CD, several organic acids including citric acid (CA), tartaric acid (TA), and malic acid (MA) were cross-linked with β-cyclodextrin in this study. The obtained polymers were characterized by different advanced analytical techniques such as FTIR, SEM, and UV-vis spectrophotometry. Malachite green dye was removed from aqueous solutions using the synthesized polymers by adsorption. The adsorption investigation was conducted under several conditions, including pH, adsorbent mass, dye concentration, temperature, contact time, adsorption isotherm, and kinetics. The adsorbent CA/β-CD shows the highest adsorption of MG dye in all of the conditions because it contains a high number of carboxyl groups. The negatively charged carboxyl ions of CA/β-CD attract the positively charged MG dye electrostatically and remove MG from aqueous media with an efficiency of 91%. As a result, the findings indicated that water-insoluble polymers based on β-cyclodextrin are well-suited as inexpensive adsorbents to remove colors from aqueous media.
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Affiliation(s)
| | - Rajesha Ganalu
- Department of Studies in Chemistry, Bharathi College - Post Graduate and Research Centre, Bharathi Nagara 571422, Karnataka, India
| | - Shashikanth
- Department of Studies in Chemistry, Manasagangothri, University of Mysore, Mysuru 570006, India
| | - Shareefraza J Ukkund
- Department of Biotechnology, P. A. College of Engineering, Mangalore 574153, India
| | - Shamsuddin Ahmed
- Department of Mechanical and Chemical Engineering, Islamic University of Technology, Dhaka 1704, Bangladesh
| | - Majed AlSubih
- Civil Engineering Department, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia
| | - Saiful Islam
- Civil Engineering Department, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia
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Abbas Z, Jung SM. A facile method of treating spent catalysts via using solvent for recovering undamaged catalyst support. PLoS One 2024; 19:e0296271. [PMID: 38166048 PMCID: PMC10760920 DOI: 10.1371/journal.pone.0296271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 12/10/2023] [Indexed: 01/04/2024] Open
Abstract
The process of washing and removing crude oil from spent catalysts is a serious issue in both catalyst regeneration and precious metals recovery. In this work, five different solvents with various polar and aromatic properties were chosen to evaluate their impact on the catalyst support structure and crude oil recovery from oil-contaminated spent catalysts. After the deoiling process, the spent catalyst was analyzed by scanning electron microscopy, X-ray diffraction (XRD), Fourier transform-infrared spectroscopy, elemental analyzer, contact angle measurement, gas chromatography-mass spectrometry, inductively coupled plasma-atomic emission spectroscopy, and Brunauer Emmet Teller (BET) method. Our findings demonstrate that p-xylene and kerosene are more effective in removing oil than other solvents. This is due to crude oil's similar polarity and molecular nature with kerosene and p-xylene. Considering the economical reason, kerosene is a better choice for deoiling spent catalyst compared to p-xylene as it is more affordable than p-xylene. XRD data show that the structure of the catalyst support was unaltered by the solvent treatment process, while BET data reveals that the surface area and pore volume are significantly enhanced after the deoiling process. These results imply that deoiling is a very crucial step for the recycling, regeneration, and reuse of spent catalysts. Our work is significant in developing sustainable approaches for managing spent catalysts, and minimizing waste and environmental pollution.
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Affiliation(s)
- Zaheer Abbas
- Green Carbon Research Center, Korea Research Institute of Chemical Technology, Daejeon, Korea
| | - Simon MoonGeun Jung
- Green Carbon Research Center, Korea Research Institute of Chemical Technology, Daejeon, Korea
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Sun J, Guo J, Li Y, Guan F, Zhang Y, Li Z. Guar-based aerogels with oriented lamellar structure and lightweight properties for flame-retardant and thermal insulation. Int J Biol Macromol 2024; 256:128318. [PMID: 38000610 DOI: 10.1016/j.ijbiomac.2023.128318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 10/14/2023] [Accepted: 11/17/2023] [Indexed: 11/26/2023]
Abstract
In this study, a multi-functional guar gum aerogel with the oriented lamellar structure, which introduced sodium silicate (Na2O·nSiO2) and phytic acid (PA) as thermal insulation additives and flame-retardant agents, respectively, was fabricated via freeze drying. Our aerogel's chemical structure, morphology, and thermal and mechanical properties were analyzed. The oriented lamellar structure was attributed to the orientated growth of ice crystals, which was induced by the "silicate-guar, guar-phytate, and phytate-silicate" multiple hydrogen bonds formed between Na2O·nSiO2, PA, and guar gum. The density of the sample with 2 wt% PA could reach 0.0335 g·cm-3, and the porosity was 5 %, along with a specific pore volume of 0.8144 cm3·g-1. The mechanical properties and thermal insulation performed significant differences in the radial and axial direction of the oriented lamella (nearly 100 % resilience while 50 % deformation quantity and 0.0235 W/(m*K) of thermal conductivity in the radial direction, up to 0.079 MPa of compressive strength in the axial direction). The presence of PA attached a good flame-retardant ability to our aerogel (The Limiting Oxygen Index (LOI) was 30.77 %). This work provides a novel and promising method for developing anisotropic aerogel with excellent potential in building energy efficiency and flame-retardant.
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Affiliation(s)
- Jianbin Sun
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Jing Guo
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China; State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China.
| | - Yi Li
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Fucheng Guan
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China.
| | - Yihang Zhang
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Zheng Li
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
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Ghosh S, Katiyar JD, Chattopadhyay S. Stimuli-directed selective detection of Cu 2+ and Cr 2O 72- ions using a pH-responsive chitosan-poly(aminoamide) fluorescent microgel in aqueous media. SOFT MATTER 2023; 20:79-88. [PMID: 37999681 DOI: 10.1039/d3sm01319g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
In this work, the preparation of a pH-responsive fluorescent microgel, (NANO-PAMAM-CHT), is presented for the selective detection of Cu2+ and Cr2O72- ions. The NANO-PAMAM-CHT (nanosized polyaminoamide-chitosan microgel) is synthesized via aza-Michael addition reactions in a controlled and stepwise manner in water, using easily affordable starting materials like 1,4-diaminobutane, N,N'-methylene-bis-acrylamide, NIPAM and chitosan. NANO-PAMAM-CHT shows pH-responsive fluorescent properties, whereas the fluorescence intensity shows a pH-responsive change. Due to the selective fluorescence quenching, the microgel can detect both Cu2+ ions and Cr2O72- ions selectively at ambient pH in aqueous medium. Moreover, it can selectively differentiate between Cu2+ ion and Cr2O72- ions at pH ∼3 in water. The limits of detection for Cu2+ ions and Cr2O72- ions are reported as 16.9 μM and 2.62 μM, respectively (lower than the minimum allowed level in drinking water) at pH ∼7. Mechanistic study further reveals the dynamic quenching phenomenon in the presence of Cu2+ ions and static quenching in the presence of Cr2O72- ions.
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Affiliation(s)
- Soumen Ghosh
- Department of Chemistry, Indian Institute of Technology Patna, Bihta, Patna 801106, Bihar, India.
| | - Jyoti Devi Katiyar
- Department of Chemistry, Indian Institute of Technology Patna, Bihta, Patna 801106, Bihar, India.
| | - Subrata Chattopadhyay
- Department of Chemistry, Indian Institute of Technology Patna, Bihta, Patna 801106, Bihar, India.
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Wei S, Kamali AR. Green conversion of waste PET into magnetic Ni 0·4Fe 2·6O 4/(Fe,Ni)@carbon nanostructure for adsorption and separation of dyes from aqueous media. CHEMOSPHERE 2023; 342:140172. [PMID: 37714476 DOI: 10.1016/j.chemosphere.2023.140172] [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: 05/22/2023] [Revised: 08/20/2023] [Accepted: 09/12/2023] [Indexed: 09/17/2023]
Abstract
A nanostructured core-shell composite (Ni0·4Fe2·6O4/(Fe,Ni)@carbon, NFC) comprising magnetic nano-cores encapsulated with graphitic shells (≈80 wt%) is prepared by facile and clean mechanochemical-molten salt processing approach using waste PET; providing a specific surface area of 201.9 m2 g-1, well-developed mesopores, and ferromagnetic behavior characterized by the coercivity value of 149 Oe. NFC is utilized as a high-performance adsorbent for the removal of organic dyes from their aqueous solutions. Moreover, the magnetic performance of NFC enables the facile collection of the exhausted adsorbent out of the purified water. Performances of NFC for the removal of crystal violet dye (CV), methyl orange (MO) and rhodamine B (Rh B) from their aqueous solutions are systematically investigated under different environmental conditions including the adsorbent dosage and dye concentration, as well as the solution pH and temperature, where an impressive CV removal capacity of 201.6-243.8 mg g-1 is recorded for a wide pH range of 2-10. Mechanism and kinetics involved in the adsorption process are investigated by studying the adsorption isotherms and thermodynamics. The dye adsorption of the nanocomposite material is confirmed to follow the pseudo-second-order kinetic model combined with the Langmuir isotherm model, exhibiting an excellent spontaneous and exothermic monolayer adsorption capacity of around 153 mg g-1 (for MO) for the fresh adsorbent and around 89 mg g-1 after three adsorption-regeneration cycles.
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Affiliation(s)
- Shuhui Wei
- Energy and Environmental Materials Research Centre (E(2)MC), School of Metallurgy, Northeastern University, Shenyang, 110819, China
| | - Ali Reza Kamali
- Energy and Environmental Materials Research Centre (E(2)MC), School of Metallurgy, Northeastern University, Shenyang, 110819, China.
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Jeon Y, Kim D, Lee S, Lee K, Ko Y, Kwon G, Park J, Kim UJ, Hwang SY, Kim J, You J. Multiscale Porous Carbon Materials by In Situ Growth of Metal-Organic Framework in the Micro-Channel of Delignified Wood for High-Performance Water Purification. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2695. [PMID: 37836336 PMCID: PMC10574260 DOI: 10.3390/nano13192695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 09/27/2023] [Accepted: 09/27/2023] [Indexed: 10/15/2023]
Abstract
Porous carbon materials are suitable as highly efficient adsorbents for the treatment of organic pollutants in wastewater. In this study, we developed multiscale porous and heteroatom (O, N)-doped activated carbon aerogels (CAs) based on mesoporous zeolitic imidazolate framework-8 (ZIF-8) nanocrystals and wood using 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) oxidation, in situ synthesis, and carbonization/activation. The surface carboxyl groups in a TEMPO-oxidized wood (TW) can provide considerably large nucleation sites for ZIF-8. Consequently, ZIF-8, with excellent porosity, was successfully loaded into the TW via in situ growth to enhance the specific surface area and enable heteroatom doping. Thereafter, the ZIF-8-loaded TW was subjected to a direct carbonization/activation process, and the obtained activated CA, denoted as ZIF-8/TW-CA, exhibited a highly interconnected porous structure containing multiscale (micro, meso, and macro) pores. Additionally, the resultant ZIF-8/TW-CA exhibited a low density, high specific surface area, and excellent organic dye adsorption capacity of 56.0 mg cm-3, 785.8 m2 g-1, and 169.4 mg g-1, respectively. Given its sustainable, scalable, and low-cost wood platform, the proposed high-performance CA is expected to enable the substantial expansion of strategies for environmental protection, energy storage, and catalysis.
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Affiliation(s)
- Youngho Jeon
- Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si 17104, Republic of Korea (S.Y.H.)
| | - Dabum Kim
- Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si 17104, Republic of Korea (S.Y.H.)
| | - Suji Lee
- Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si 17104, Republic of Korea (S.Y.H.)
| | - Kangyun Lee
- Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si 17104, Republic of Korea (S.Y.H.)
| | - Youngsang Ko
- Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si 17104, Republic of Korea (S.Y.H.)
| | - Goomin Kwon
- Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si 17104, Republic of Korea (S.Y.H.)
| | - Jisoo Park
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Ung-Jin Kim
- Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si 17104, Republic of Korea (S.Y.H.)
| | - Sung Yeon Hwang
- Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si 17104, Republic of Korea (S.Y.H.)
| | - Jeonghun Kim
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Jungmok You
- Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si 17104, Republic of Korea (S.Y.H.)
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Kaushik J, Sharma C, Lamba NK, Sharma P, Das GS, Tripathi KM, Joshi RK, Sonkar SK. 3D Porous MoS 2-Decorated Reduced Graphene Oxide Aerogel as a Heterogeneous Catalyst for Reductive Transformation Reactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:12865-12877. [PMID: 37639338 DOI: 10.1021/acs.langmuir.3c01785] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
The MoS2-based reduced graphene oxide aerogel (MoS2-rGOA)-assisted organic transformation reactions are presented. MoS2-rGOA is used as a heterogeneous catalyst for the reduction of benzene derivatives such as benzaldehyde, nitrobenzene, and benzonitrile to benzyl alcohol, aniline, and benzamide and their derivatives, respectively, in green solvents (water/methanol) and green reducing agents (hydrazine hydrate having N2 and H2 as byproducts). The mechanistic features of the reduction pathway, substrate scope, and the best suitable conditions by varying the temperature, solvent, reducing agent, catalyst loading, time, etc. are optimized. All of the synthesized products are obtained in quantitative yield with purity and well characterized based on nuclear magnetic resonance analysis. Further, it is also observed that our catalyst is efficiently recyclable and works well checked up to 5 cycles.
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Affiliation(s)
- Jaidev Kaushik
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur 302017, India
| | - Charu Sharma
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur 302017, India
| | - Nicky Kumar Lamba
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur 302017, India
| | - Purshotam Sharma
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur 302017, India
| | - Gouri Sankar Das
- Department of Chemistry, Indian Institute of Petroleum and Energy, Visakhapatnam 530003, Andhra Pradesh, India
| | - Kumud Malika Tripathi
- Department of Chemistry, Indian Institute of Petroleum and Energy, Visakhapatnam 530003, Andhra Pradesh, India
| | - Raj Kumar Joshi
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur 302017, India
| | - Sumit Kumar Sonkar
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur 302017, India
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10
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Garg AK, Singh B, Naskar S, Prajapati RK, Dalal C, Sonkar SK. Melamine-Formaldehyde Polymer-Based Nanocomposite for Sunlight-Driven Photodegradation of Multiple Dyes and Their Mixture. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 37494146 DOI: 10.1021/acs.langmuir.3c01349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/28/2023]
Abstract
Cadmium sulfide (CdS)-decorated, cross-linked melamine-formaldehyde polymer-based nanocomposite (MFP-CdS) has been synthesized. MFP-CdS is utilized here as a photoactive material for the photodegradation of six model organic dyes and their mixture in an aqueous medium in the presence of sunlight. The half-life values from the kinetic study of multiple dyes strongly support the importance of sunlight on the fast degradation of all six dyes compared to bulb light and control (dark) conditions. A comparative 1H NMR analysis of the dyes and their degraded products has been performed to support the breakdown of the aromatic framework of organic dyes using MFP-CdS in sunlight. The mechanisms involved in the photodegradation of dyes have been investigated based on radical trapping studies that support the significant involvement of superoxide radicals along with holes. Moreover, the dye removal efficiency using MFP-CdS from real industrial wastewater samples is evaluated via the external spiking of organic dyes and their mixture in unknown industrial effluents where they showed similar photodegradation results. Based on the high recyclability of MFP-CdS, these are used for multiple cycles.
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Affiliation(s)
- Anjali Kumari Garg
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur 302017, Rajasthan, India
| | - Buta Singh
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur 302017, Rajasthan, India
| | - Sourenjit Naskar
- Quality Control Department (M.D.), Indian Oil Corporation Limited, Jaipur 303904, Rajasthan, India
| | - Rajneesh Kumar Prajapati
- Centre for Nanosciences, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Chumki Dalal
- Department of Chemistry, JECRC University, Jaipur 303905, Rajasthan, India
- Department of Applied Sciences, National Institute of Technology, Delhi 110040, New Delhi, India
| | - Sumit Kumar Sonkar
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur 302017, Rajasthan, India
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Yin M, Jiang H, Shi L, Zhang D, He Z, Luo Y, Pan B. Air-enclosed pores in graphene aerogel inhibit the adsorption of bisphenol A but accelerate the adsorption of naphthalene. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 259:114989. [PMID: 37178614 DOI: 10.1016/j.ecoenv.2023.114989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 04/24/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023]
Abstract
Graphene hydrogel (GH) and aerogel (GA) have great application potential as highly effective adsorbents, but the accessibility of their adsorption sites have not yet been identified, restricting our understanding on the adsorption mechanisms and manufacturing. This study comparatively studied the adsorption characteristics of bisphenol A (BPA) and naphthalene (NAP) on GH and GA, focussing on the accessibility of the adsorption sites. The adsorption of BPA on GA was much lower but faster than that on GH. NAP adsorption on GA was very close to that on GH but faster than that on the latter. Considering that NAP is volatilisable, we speculate that some unwetted sites in the air-enclosed pores are available to it, but not to BPA. We applied ultrasonic and vacuum treatments to remove the air in GA pores, which was verified using a CO2 replacement experiment. BPA adsorption was greatly enhanced but slowed, while that of NAP was not enhanced. This phenomenon suggested that some inner pores became accessible in the aqueous phase after air removal from pores. The enhanced accessibility of air-enclosed pores was verified by the increased relaxation rate of surface-bounded water on GA, based on a 1H NMR relaxation analysis. This study highlights that the accessibility of adsorption site plays a crucial role for the adsorption properties of carbon-based aerogel. The volatile chemicals may be quickly adsorbed in the air-enclosed pores, which be useful for immobilizing volatile contaminants.
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Affiliation(s)
- Mengnan Yin
- Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection, College of Resources and Environment, Linyi University, Linyi 276005, China; Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Hui Jiang
- Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China
| | - Lin Shi
- Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection, College of Resources and Environment, Linyi University, Linyi 276005, China
| | - Di Zhang
- Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection, College of Resources and Environment, Linyi University, Linyi 276005, China.
| | - Zhaohui He
- Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Yong Luo
- Yunnan Maochen Engineering Consulting Co. LTD, Kunming 650301, China
| | - Bo Pan
- Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
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12
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Kumari P, Tripathi KM, Awasthi K, Gupta R. Biomass-derived carbon nano-onions for the effective elimination of organic pollutants and oils from water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27457-5. [PMID: 37156947 DOI: 10.1007/s11356-023-27457-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Accepted: 05/02/2023] [Indexed: 05/10/2023]
Abstract
Oil spillage and leakage of organic solvents have caused severe environmental and ecological damages. It is of great significance to develop a cost-efficient and green adsorbent material with high uptake efficiency to separate the oil-water mixture. In this work, biomass-derived CNOs were first time explored in the adsorption of organic pollutants and oils from water. Carbon nano-onions (CNOs) with hydrophobicity and oleophilicity were cost-effectively synthesized in an energy efficient flame pyrolysis process using flaxseed oil as a carbon source. The as-synthesized CNOs without any further surface modification have shown high adsorption efficiency in removing organic solvents and oils from the oil-water mixture. The CNOs could adsorb diverse organic solvents such as pyridine (36.81 mg g-1), dichloromethane (90.95 mg mg-1), aniline (76 mg mg-1), toluene (64 mg mg-1), chloroform (36.25 mg mg-1), methanol (49.25 mg mg-1), and ethanol (42.25 mg mg-1). The uptake capacity for petrol and diesel over CNOs was observed at 36.68 mg mg-1 and 58.1 mg mg-1, respectively. The adsorption of pyridine followed pseudo-second-order kinetics and Langmuir's isotherm model. Moreover, the adsorption efficiency of CNOs towards the remediation of pyridine was almost similar in real-water samples when tested in tap water, dam water, groundwater, and lake water. Similarly, the practical applicability for the separation of petrol and diesel was also verified in the real sample (sea water) and has been proven to be excellent. By simple evaporation, the recovered CNOs can be reused for more than 5 cycles. CNOs exhibit the promising potential to be used in practical applications for oil-polluted water treatment.
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Affiliation(s)
- Poonam Kumari
- Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, Rajasthan, 302017, India
| | - Kumud Malika Tripathi
- Department of Chemistry, Indian Institute of Petroleum and Energy, Vishakhapatnam, Andhra Pradesh, 530003, India
| | - Kamlendra Awasthi
- Department of Physics, Malaviya National Institute of Technology Jaipur, Jaipur, Rajasthan, 302017, India
| | - Ragini Gupta
- Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, Rajasthan, 302017, India.
- Materials Research Centre, Malaviya National Institute of Technology Jaipur, Jaipur, Rajasthan, 302017, India.
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13
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Yadav K, Latelwar SR, Datta D, Jana B. Efficient removal of MB dye using litchi leaves powder adsorbent: Isotherm and kinetic studies. J INDIAN CHEM SOC 2023. [DOI: 10.1016/j.jics.2023.100974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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14
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Biopolymeric Fibrous Aerogels: The Sustainable Alternative for Water Remediation. Polymers (Basel) 2023; 15:polym15020262. [PMID: 36679143 PMCID: PMC9867057 DOI: 10.3390/polym15020262] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 12/22/2022] [Accepted: 12/26/2022] [Indexed: 01/07/2023] Open
Abstract
The increment in water pollution due to the massive development in the industrial sector is a worldwide concern due to its impact on the environment and human health. Therefore, the development of new and sustainable alternatives for water remediation is needed. In this context, aerogels present high porosity, low density, and a remarkable adsorption capacity, making them candidates for remediation applications demonstrating high efficiency in removing pollutants from the air, soil, and water. Specifically, polymer-based aerogels could be modified in their high surface area to integrate functional groups, decrease their hydrophilicity, or increase their lipophilicity, among other variations, expanding and enhancing their efficiency as adsorbents for the removal of various pollutants in water. The aerogels based on natural polymers such as cellulose, chitosan, or alginate processed by different techniques presented high adsorption capacities, efficacy in oil/water separation and dye removal, and excellent recyclability after several cycles. Although there are different reviews based on aerogels, this work gives an overview of just the natural biopolymers employed to elaborate aerogels as an eco-friendly and renewable alternative. In addition, here we show the synthesis methods and applications in water cleaning from pollutants such as dyes, oil, and pharmaceuticals, providing novel information for the future development of biopolymeric-based aerogel.
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15
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Zaw Win M, Hye Park J, Htet Naing H, Woo Hong M, Oo W, Bok Yi K. Analysis of Preservative Ability of Chitosan on CO Adsorption of CuCl-Alumina-Based Composites. J IND ENG CHEM 2023. [DOI: 10.1016/j.jiec.2022.12.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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16
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Aggarwal R, Garg AK, Saini D, Sonkar SK, Sonker AK, Westman G. Cellulose Nanocrystals Derived from Microcrystalline Cellulose for Selective Removal of Janus Green Azo Dye. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c03365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Ruchi Aggarwal
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur302017, India
| | - Anjali Kumari Garg
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur302017, India
| | - Deepika Saini
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur302017, India
| | - Sumit Kumar Sonkar
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur302017, India
| | - Amit Kumar Sonker
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg41296, Sweden
- Wallenberg Wood Science Center (WWSC), Chalmers University of Technology, Gothenburg41296, Sweden
| | - Gunnar Westman
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg41296, Sweden
- Wallenberg Wood Science Center (WWSC), Chalmers University of Technology, Gothenburg41296, Sweden
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17
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Liu M, Zheng J, Wang L, Hu Z, Lan S, Rao W, Liu Y, Xie Y, Yu C. Ultrafast and selective adsorption of anionic dyes with amine-functionalized glucose-based adsorbents. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133150] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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18
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Park M, Sharma A, Kang C, Han J, Tripathi KM, Lee HJ. N-Doped Carbon Nanorods from Biomass as a Potential Antidiabetic Nanomedicine. ACS Biomater Sci Eng 2022; 8:2131-2141. [PMID: 35476416 DOI: 10.1021/acsbiomaterials.1c01598] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Insufficient glucose control remains a critical challenge for type 2 diabetes mellitus (T2DM) patients with currently used therapeutic drugs, which can also have detrimental side effects. The facile synthesis of nitrogen-doped carbon nanorods (N-CNRs) as therapeutic agents in a T2DM transgenic db/db mouse model is reported herein. N-CNRs are synthesized from silkworm powder without the assistance of any template and possess a hollow graphitic nature, rough surface, and good aqueous solubility, which make them ideal candidates for fabricating nanomedicines. N-CNRs are employed to reduce fasting blood glucose and ameliorate serum biomarker levels linked to oxidative stress and inflammation. Interestingly, through the downregulation of enhanced expression of glutathione peroxidase, superoxide dismutase, and catalase as well as inflammatory responses, N-CNRs reverse pancreatic dysfunction and normalize the secretory functions of pancreatic cells. Moreover, hepatic steatosis is attenuated by downregulating lipogenesis and increasing fatty acid oxidation. This finding may help in designing novel therapeutics for T2DM treatment.
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Affiliation(s)
- Miey Park
- Department of Food and Nutrition, College of BioNano Technology, Gachon University, Gyeonggi-do 13120, Korea
| | - Anshul Sharma
- Department of Food and Nutrition, College of BioNano Technology, Gachon University, Gyeonggi-do 13120, Korea
| | - Chaewon Kang
- Department of Food and Nutrition, College of BioNano Technology, Gachon University, Gyeonggi-do 13120, Korea
| | - Jinyoung Han
- Department of Food and Nutrition, College of BioNano Technology, Gachon University, Gyeonggi-do 13120, Korea
| | - Kumud Malika Tripathi
- Department of Chemistry, Indian Institute of Petroleum and Energy, Visakhapatnam 530003, Andhra Pradesh, India
| | - Hae-Jeung Lee
- Department of Food and Nutrition, College of BioNano Technology, Gachon University, Gyeonggi-do 13120, Korea
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19
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Enhanced photocatalytic degradation of Acid Blue dye using CdS/TiO 2 nanocomposite. Sci Rep 2022; 12:5759. [PMID: 35388044 PMCID: PMC8986795 DOI: 10.1038/s41598-022-09479-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 03/02/2022] [Indexed: 11/18/2022] Open
Abstract
Photocatalytic degradation is essential for the successful removal of organic contaminants from wastewater, which is important for ecological and environmental safety. The advanced oxidation process of photocatalysis has become a hot topic in recent years for the remediation of water. Cadmium sulphide (CdS) nanostructures doped with Titanium oxide (CdS/TiO2) nanocomposites has manufactured under ambient conditions using a simple and modified Chemical Precipitation technique. The nanocomposites crystal structure, thermal stability, recombination of photo-generated charge carriers, bandgap, surface morphology, particle size, molar ratio, and charge transfer properties are determined. The production of nanocomposites (CdS-TiO2) and their efficient photocatalytic capabilities are observed. The goal of the experiment is to improve the photocatalytic efficiency of TiO2 in the visible region by doping CdS nanocomposites. The results showed that as-prepared CdS-TiO2 nanocomposites has exhibited the highest photocatalytic activity in the process of photocatalytic degradation of AB-29 dye, and its degradation efficiency is 84%. After 1 h 30 min of visible light irradiation, while CdS and TiO2 showed only 68% and 09%, respectively. The observed decolorization rate of AB-29 is also higher in the case of CdS-TiO2 photocatalyst ~ 5.8 × 10−4mol L−1 min−1) as compared to the reported decolorization rate of CdS ~ 4.5 × 10−4mol L−1 min−1 and TiO2 ~ 0.67 × 10−4mol L−1 min−1. This increased photocatalytic effectiveness of CdS-TiO2 has been accomplished by reduced charge carrier recombination as a result of improved charge separation and extension of TiO2 in response to visible light.
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20
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Promising adsorptive materials derived from agricultural and industrial wastes for antibiotic removal: A comprehensive review. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120286] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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21
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Efficient Dye Contaminant Elimination and Simultaneously Electricity Production via a Bi-Doped TiO 2 Photocatalytic Fuel Cell. NANOMATERIALS 2022; 12:nano12020210. [PMID: 35055228 PMCID: PMC8778080 DOI: 10.3390/nano12020210] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/06/2022] [Accepted: 01/07/2022] [Indexed: 11/16/2022]
Abstract
TiO2 develops a higher efficiency when doping Bi into it by increasing the visible light absorption and inhibiting the recombination of photogenerated charges. Herein, a highly efficient Bi doped TiO2 photoanode was fabricated via a one-step modified sol-gel method and a screen-printing technique for the anode of photocatalytic fuel cell (PFC). A maximum degradation rate of 91.2% of Rhodamine B (RhB) and of 89% after being repeated 5 times with only 2% lost reflected an enhanced PFC performance and demonstrated an excellent stability under visible-light irradiation. The excellent degradation performance was attributed to the enhanced visible-light response and decreased electron-hole recombination rate. Meanwhile, an excellent linear correlation was observed between the efficient photocurrent of PFC and the chemical oxygen demand of solution when RhB is sufficient.
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22
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Kaushik J, Kumar V, Tripathi KM, Sonkar SK. Sunlight-promoted photodegradation of Congo red by cadmium-sulfide decorated graphene aerogel. CHEMOSPHERE 2022; 287:132225. [PMID: 34547561 DOI: 10.1016/j.chemosphere.2021.132225] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 09/02/2021] [Accepted: 09/07/2021] [Indexed: 06/13/2023]
Abstract
Herein, a simpler-viable methodology for the surface decoration of pear fruit derived graphene aerogel (GA) via cadmium sulfide (CdS) has been presented. GA can be easily synthesized from bio-mass, which provide an economic advantage. Surface decoration via CdS imparts photocatalytic activities in functionalized graphene aerogels (f-GA). CdS-f-GA is being explored here as a photocatalyst for the degradation of a toxic azo dye named Congo red in the presence of sunlight. The rate and mechanism associated with photodegradation were analyzed by performing kinetics and radical trap-based quenching experiments. Nuclear magnetic resonance and fourier transform infrared spectroscopy analyses of the control and photodegraded products were performed to ensure the degradation of the organic framework of Congo red. Additionally, the real-life applicability of CdS-f-GA was also analyzed by degrading the dye in different types of industrial samples (via the method of external spiking), which can advance its practical relevance.
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Affiliation(s)
- Jaidev Kaushik
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur, 302017, India
| | - Vishrant Kumar
- Department of Chemical Engineering, Indian Institute of Science Education and Research Bhopal, Bhopal, 462066, Madhya Pradesh, India
| | - Kumud Malika Tripathi
- Department of Chemistry, Indian Institute of Petroleum and Energy, Visakhapatnam, 530003, Andhra Pradesh, India.
| | - Sumit Kumar Sonkar
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur, 302017, India.
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23
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Kaushik J, Tripathi KM, Singh R, Sonkar SK. Thiourea-functionalized graphene aerogel for the aqueous phase sensing of toxic Pb(II) metal ions and H 2O 2. CHEMOSPHERE 2022; 287:132105. [PMID: 34826890 DOI: 10.1016/j.chemosphere.2021.132105] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 08/06/2021] [Accepted: 08/29/2021] [Indexed: 06/13/2023]
Abstract
A simpler approach of functionalization for the fabrication of thiourea-functionalized-Graphene Aerogel (t-GA) is described here. Graphene Aerogel (GA) was synthesized from bio-mass, which on a simpler oxidative treatment get converted to its water-soluble version due to the impregnation of several oxygenous functionalities like carboxylic, hydroxyl, etc. Further, these carboxylated groups have been functionalized with the molecules of thiourea using the long known dicyclohexylcarbodiimide (DCC) as a coupling agent. The as-synthesized t-GA shows bright yellow fluorescence with a quantum yield of ~3% and holds the high-aqueous solubility and photostability. The fluorescence property of t-GA has been used here for the specific and selective sensing of toxic lead (Pb(II)) metal ions from the used many other metal ions via the fluorescence quenching and showed a limit of detection ~7.3 nM. Further, the mechanism for selective sensing was studied in detail and found to be preferable via ligand to metal charge transfer quenching mechanism. The cyclic voltammetry studies supported the selective sensing of Pb(II). Moreover, t-GA has also been studied for the sensing of hydrogen peroxide and as a yellow fluorescent ink.
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Affiliation(s)
- Jaidev Kaushik
- Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, 302017, Rajasthan, India
| | - Kumud Malika Tripathi
- Department of Chemistry, Indian Institute of Petroleum and Energy, Visakhapatnam, 530003, Andhra Pradesh, India
| | - Ravindra Singh
- Department of Chemistry, Maharani Shri Jaya Government Post-Graduate College, Bharatpur, Rajasthan, 321001, India
| | - Sumit Kumar Sonkar
- Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, 302017, Rajasthan, India.
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24
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Sun J, Wang L, Wang Y, Lv W, Yao Y. Activation of peroxymonosulfate by MgCoAl layered double hydroxide: Potential enhancement effects of catalyst morphology and coexisting anions. CHEMOSPHERE 2022; 286:131640. [PMID: 34315085 DOI: 10.1016/j.chemosphere.2021.131640] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 07/17/2021] [Accepted: 07/20/2021] [Indexed: 06/13/2023]
Abstract
The morphology and specific surface area of layered double hydroxide (LDH) are of great significance for optimizing the application of LDH in sewage treatment. Herein, we present a study of the relation between the catalytic property and the morphology of LDH via activating peroxymonosulfate (PMS) for degradation of organic pollutants. The results demonstrated that LDH nanoscrolls possessed a superior performance for methylene blue (MB) degradation, which achieved almost 100% removal in 40 min and the calculated apparent rate constant was about 2.1, 4.5 and 11.5 times higher than that of LDH nanosheets, Co2+ and Co3O4, respectively. According to the results of X-ray photoelectrons spectroscopy (XPS) and electron paramagnetic resonance (EPR), 1O2 was confirmed to play a dominant role in the MB degradation, where the redox cycle of Co3+/Co2+ provided the impetus for the reaction. Moreover, the pH and ion tolerance abilities of LDH nanoscrolls in PMS activating process were determined as well. Remarkably, CO32- and H2PO4- could even promote the generation of •OH and 1O2 to facilitate the progress of reaction. Overall, these findings in the study may provide more opportunities in the preparation of high-efficiency catalysts and give insight into the accelerated degradation of refractory contaminants with surrounding anions.
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Affiliation(s)
- Ji'an Sun
- National Engineering Lab of Textile Fiber Materials & Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, 310018, PR China
| | - Lixin Wang
- National Engineering Lab of Textile Fiber Materials & Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, 310018, PR China
| | - Yuge Wang
- National Engineering Lab of Textile Fiber Materials & Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, 310018, PR China
| | - Weiyang Lv
- National Engineering Lab of Textile Fiber Materials & Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, 310018, PR China.
| | - Yuyuan Yao
- National Engineering Lab of Textile Fiber Materials & Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, 310018, PR China
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25
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Liang R, Wang S, Lu Y, Yan G, He Z, Xia Y, Liang Z, Wu L. Assembling Ultrafine SnO 2 Nanoparticles on MIL-101(Cr) Octahedrons for Efficient Fuel Photocatalytic Denitrification. Molecules 2021; 26:7566. [PMID: 34946648 PMCID: PMC8708904 DOI: 10.3390/molecules26247566] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 12/08/2021] [Accepted: 12/10/2021] [Indexed: 11/16/2022] Open
Abstract
Effectively reducing the concentration of nitrogen-containing compounds (NCCs) remains a significant but challenging task in environmental restoration. In this work, a novel step-scheme (S-scheme) SnO2@MCr heterojunction was successfully fabricated via a facile hydrothermal method. At this heterojunction, MIL-101(Cr) octahedrons are decorated with highly dispersed SnO2 quantum dots (QDs, approximate size 3 nm). The QDs are evenly wrapped around the MIL-101(Cr), forming an intriguing zero-dimensional/three-dimensional (0D/3D) S-scheme heterostructure. Under simulated sunlight irradiation (280 nm < λ < 980 nm), SnO2@MCr demonstrated superior photoactivity toward the denitrification of pyridine, a typical NCC. The adsorption capacity and adsorption site of SnO2@MCr were also investigated. Tests using 20%SnO2@MCr exhibited much higher activity than that of pure SnO2 and MIL-101(Cr); the reduction ratio of Cr(VI) is rapidly increased to 95% after sunlight irradiation for 4 h. The improvement in the photocatalytic activity is attributed to (i) the high dispersion of SnO2 QDs, (ii) the binding of the rich adsorption sites with pyridine molecules, and (iii) the formation of the S-scheme heterojunction between SnO2 and MIL-101(Cr). Finally, the photocatalytic mechanism of pyridine was elucidated, and the possible intermediate products and degradation pathways were discussed.
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Affiliation(s)
- Ruowen Liang
- Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde 352100, China; (R.L.); (S.W.); (Y.L.); (G.Y.); (Z.H.)
- Fujian Provincial Key Laboratory of Featured Materials in Biochemical Industry, Ningde Normal University, Ningde 352100, China
| | - Shihui Wang
- Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde 352100, China; (R.L.); (S.W.); (Y.L.); (G.Y.); (Z.H.)
- State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China
| | - Yi Lu
- Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde 352100, China; (R.L.); (S.W.); (Y.L.); (G.Y.); (Z.H.)
- State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China
| | - Guiyang Yan
- Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde 352100, China; (R.L.); (S.W.); (Y.L.); (G.Y.); (Z.H.)
- Fujian Provincial Key Laboratory of Featured Materials in Biochemical Industry, Ningde Normal University, Ningde 352100, China
- Xiamen Ocean Vocational College, Xiamen 361000, China
| | - Zhoujun He
- Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde 352100, China; (R.L.); (S.W.); (Y.L.); (G.Y.); (Z.H.)
- Fujian Provincial Key Laboratory of Featured Materials in Biochemical Industry, Ningde Normal University, Ningde 352100, China
| | - Yuzhou Xia
- Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde 352100, China; (R.L.); (S.W.); (Y.L.); (G.Y.); (Z.H.)
- Fujian Provincial Key Laboratory of Featured Materials in Biochemical Industry, Ningde Normal University, Ningde 352100, China
| | - Zhiyu Liang
- Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde 352100, China; (R.L.); (S.W.); (Y.L.); (G.Y.); (Z.H.)
- Fujian Provincial Key Laboratory of Featured Materials in Biochemical Industry, Ningde Normal University, Ningde 352100, China
| | - Ling Wu
- State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China
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26
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Wang L, Li Y, Han P. Electrospinning preparation of g-C 3N 4/Nb 2O 5 nanofibers heterojunction for enhanced photocatalytic degradation of organic pollutants in water. Sci Rep 2021; 11:22950. [PMID: 34824312 PMCID: PMC8617280 DOI: 10.1038/s41598-021-02161-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 11/10/2021] [Indexed: 11/17/2022] Open
Abstract
In this study, graphitic carbon nitride (g-C3N4) and niobium pentoxide nanofibers (Nb2O5 NFs) heterojunction was prepared by means of a direct electrospinning approach combined with calcination process. The characterizations confirmed a well-defined morphology of the g-C3N4/Nb2O5 heterojunction in which Nb2O5 NFs were tightly attached onto g-C3N4 nanosheets. Compared to pure g-C3N4 and Nb2O5 NFs, the as-prepared g-C3N4/Nb2O5 heterojunction exhibited remarkably enhanced photocatalytic activity for degradation of rhodamine B and phenol under visible light irradiation. The enhanced catalytic activity was attributed predominantly to the synergistic effect between g-C3N4 sheets and Nb2O5 NFs, which promoted the transferring of carriers and prohibited their recombination, confirmed by the measurement of transient photocurrent responses and photoluminescence spectra. In addition, the active species trapping experiments indicated that superoxide radical anion (·O2–) and hole (h+) were the major active species contributing to the photocatalytic process. With its high efficacy and ease of preparation, g-C3N4/Nb2O5 heterojunction has great potentials for applications in treatment of organic pollutants and conversion of solar energy.
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Affiliation(s)
- Lu Wang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, China.,Nantong Vocational University, Nantong, 226007, China
| | - Ya Li
- Nantong College of Science and Technology, Nantong, 226007, China
| | - Pingfang Han
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, China.
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Shivalkar S, Gautam PK, Verma A, Maurya K, Sk MP, Samanta SK, Sahoo AK. Autonomous magnetic microbots for environmental remediation developed by organic waste derived carbon dots. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 297:113322. [PMID: 34325370 DOI: 10.1016/j.jenvman.2021.113322] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 07/14/2021] [Accepted: 07/16/2021] [Indexed: 06/13/2023]
Abstract
Biodegradable precursors for micro/nanobots development are key requirements for several sustainable applications. In this regard, we propose an innovative solution for water purification at minimum cost and efforts where organic waste is used for the treatment of organic pollutants. Herein, catalytic magnetic microbots were developed by functionalizing iron oxide nanoparticles with carbon dots (C-Dots), which were synthesized by using household waste such as potato peels as precursors. The speed of these autonomously propelling bots indeed is found very promising for large distance swimming even in viscous medium by using hydrogen peroxide as fuel. These microbots catalytically propel and degrade toxic polar as well as sparingly water-soluble industrial dyes without any external agitation. The degradation of dyes was confirmed by mass-spectra analysis. Furthermore, these microbots can efficiently degrade a mixture of dyes and reused without compromising its performance significantly. Additionally, rate constant (K) and activation energy (Ea) were also determined to establish the catalytic nature of the bots. The present microbots acted as nanozyme owing to its synergistic catalytic activity of Fe3O4 and C-Dots for degradation of mixture of toxic dyes, essential for large scale water treatment.
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Affiliation(s)
- Saurabh Shivalkar
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, UP, India
| | - Pavan Kumar Gautam
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, UP, India
| | - Arushi Verma
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, UP, India
| | - Krishna Maurya
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, UP, India
| | - Md Palashuddin Sk
- Department of Chemistry, Aligarh Muslim University, Aligarh, UP, India.
| | - Sintu Kumar Samanta
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, UP, India.
| | - Amaresh Kumar Sahoo
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, UP, India.
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Kishor R, Saratale GD, Saratale RG, Romanholo Ferreira LF, Bilal M, Iqbal HMN, Bharagava RN. Efficient degradation and detoxification of methylene blue dye by a newly isolated ligninolytic enzyme producing bacterium Bacillus albus MW407057. Colloids Surf B Biointerfaces 2021; 206:111947. [PMID: 34218015 DOI: 10.1016/j.colsurfb.2021.111947] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 06/23/2021] [Accepted: 06/24/2021] [Indexed: 02/08/2023]
Abstract
In present work, a LiP enzyme producing bacterium was isolated form textile wastewater and sludge sample and identified as Bacillus albus by 16S rRNA gene sequencing analysis. This bacterium decolorized 99.27 % MB dye and removed 83.87 % COD within 6 h at 30 °C, pH 7, 100 rpm and 100 mg/l of dye concentration in presence of glucose and yeast extract as carbon and nitrogen source, respectively. The bacterium also produced LiP enzyme of molecular weight ∼48 kDa, characterized by SDS-PAGE analysis. Different metabolites like monomethylthionine, thionin, (E)-2-(3-Oxopropylidene)-2H-benzo[b][1,4] thiozine-3-carboxylic acid, N-(3,4-dihydroxyphenyl)-N-methylformamide, ethylamine, water and carbon dioxide produced during treatment process were characterized by FT-IR and LC-MS analysis. Further, the toxicity assessment results showed that the toxicity of bacteria treated dye solution was reduced significantly allowing 90 % seed germination indicating that the isolated bacterium B. albus has high potential to decolorize and detoxify MB dye for environmental safety.
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Affiliation(s)
- Roop Kishor
- Laboratory of Bioremediation and Metagenomics Research (LBMR), Department of Environmental Microbiology (DEM), Babasaheb Bhimrao Ambedkar University (A Central University), Vidya Vihar, Raebareli Road, Lucknow, 226 025, U.P., India
| | - Ganesh Dattatraya Saratale
- Department of Food Science and Biotechnology, Dongguk University, Seoul, Ilsandong-gu, Goyang-si, Gyeonggi-do, 10326, Republic of Korea
| | - Rijuta Ganesh Saratale
- Research Institute of Biotechnology and Medical Converged Science, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyeonggido 10326, Republic of Korea
| | - Luiz Fernando Romanholo Ferreira
- Graduate Program in Process Engineering, Tiradentes University (UNIT), Av. Murilo Dantas, 300, Farolandia, 49032-490 Aracaju, Sergipe, Brazil; Waste and Effluent Treatment Laboratory, Institute of Technology and Research (ITP), Tiradentes University (UNIT), Av. Murilo Dantas, 300, Farolândia, 49032-490 Aracaju, Sergipe, Brazil
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Campus Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey, N.L., CP 64849, Mexico
| | - Ram Naresh Bharagava
- Laboratory of Bioremediation and Metagenomics Research (LBMR), Department of Environmental Microbiology (DEM), Babasaheb Bhimrao Ambedkar University (A Central University), Vidya Vihar, Raebareli Road, Lucknow, 226 025, U.P., India.
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Dalal C, Garg AK, Sonkar SK. β-Cyclodextrin-capped ZnO-doped carbon dot as an advanced fluorescent probe for selective detection of dopamine. NEW J CHEM 2021. [DOI: 10.1039/d1nj03665c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Selective and sensitive detection of dopamine in presence of other interfering biomolecules using β-cyclodextrin-capped ZnO-doped carbon dot.
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Affiliation(s)
- Chumki Dalal
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur-302017, India
| | - Anjali Kumari Garg
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur-302017, India
| | - Sumit Kumar Sonkar
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur-302017, India
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