1
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Duan F, Zhu Y, Lu Y, Xu J, Wang A. Fabrication porous adsorbents templated from aqueous foams using astragalus membranaceus and attapulgite as stabilizer for efficient removal of cationic dyes. J Environ Sci (China) 2023; 127:855-865. [PMID: 36522113 DOI: 10.1016/j.jes.2022.08.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 07/22/2022] [Accepted: 08/01/2022] [Indexed: 06/17/2023]
Abstract
The water-based foam stabilized by the natural surfactant applied in the fabrication of porous materials has attracted extensive attention, as the advantages of cleanness, convenience and low cost. Particularly, the development of a green preparation method has became the main research focus and frontier. In this work, a green liquid foam with high stability was prepared by synergistic stabilization of natural plant astragalus membranaceus (AMS) and attapulgite (APT), and then a novel porous material with sufficient hierarchical pore structure was templated from the foam via a simple free radical polymerization of acrylamide (AM). The characterization results revealed that the amphiphilic molecules from AMS adsorbed onto the water-air interface and formed a protective shell to prevent the bubble breakup, and APT gathered in the plateau border and formed a three-dimensional network structure, which greatly slowed down the drainage rate. The porous material polyacrylamide/astragalus membranaceus/attapulgite (PAM/AMS/APT) showed the excellent adsorption performance for cationic dyes of Methyl Violet (MV) and Methylene Blue (MB) in water, and the maximum adsorption capacity could reach to 709.13 and 703.30 mg/g, respectively. Furthermore, the polymer material enabled to regenerate and cycle via a convenient calcination process, and the adsorption capacity was still higher than 200 mg/g after five cycles. In short, this research provided a new idea for the green preparation of porous materials and the treatment of water pollution.
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Affiliation(s)
- Fangzhi Duan
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yongfeng Zhu
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
| | - Yushen Lu
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Jiang Xu
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Aiqin Wang
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
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2
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Wei Z, Sarwar S, Azam S, Ahasan MR, Voyda M, Zhang X, Wang R. Ultrafast microwave synthesis of MoTe 2@graphene composites accelerating polysulfide conversion and promoting Li 2S nucleation for high-performance Li-S batteries. J Colloid Interface Sci 2023; 635:391-405. [PMID: 36599238 DOI: 10.1016/j.jcis.2022.12.111] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 12/11/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022]
Abstract
In this report, MoTe2 nanosheets were grown on highly conductive graphene support through a simple and ultrafast microwave-assisted chemical coupling and heating method to develop hybrid sulfur host materials for Li-S batteries. MoTe2 nanosheets with superb electrocatalytic activity combined with highly conductive graphene form a nano reservoir for containing elemental sulfur, intermediate polysulfide species, discharge product Li2S, and accelerating the electron transfer. Accordingly, the Li-S battery with the MoTe2@graphene@carbon cloth electrode exhibited a high initial discharge capacity of 1246 mAh g-1 at 0.2C for the first galvanostatic cycle, good cycle stability (98.7% capacity retention after 100 cycles at 0.2C) and superb rate performance. The synergistic effect of the chemical affinity and superior electrocatalytic capability of polar MoTe2, along with the effective physical confinement by graphene and free-standing carbon cloth, provides a promising way to design host materials to mitigate the shuttling effect in rechargeable Li-S batteries.
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Affiliation(s)
- Zhen Wei
- Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, AL 35487, United States
| | - Shatila Sarwar
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, United States
| | - Sakibul Azam
- Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, AL 35487, United States
| | - Md Robayet Ahasan
- Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, AL 35487, United States
| | - Madison Voyda
- Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, AL 35487, United States
| | - Xinyu Zhang
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, United States.
| | - Ruigang Wang
- Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, AL 35487, United States.
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3
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Arévalo-Fester J, Briceño A. Insights into Selective Removal by Dye Adsorption on Hydrophobic vs Multivalent Hydrophilic Functionalized MWCNTs. ACS OMEGA 2023; 8:11233-11250. [PMID: 37008137 PMCID: PMC10061520 DOI: 10.1021/acsomega.2c08203] [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: 12/27/2022] [Accepted: 02/27/2023] [Indexed: 06/19/2023]
Abstract
Hydrophilic functionalized carbon nanotubes (MWCNT-COOH) were developed via hydrothermal glucose-coated carbonization, mixing MWCNTs with glucose in different weight ratios. Methyl violet (MV), methylene blue (MB), alizarin yellow (AY), and methyl orange (MO) were used as dye models for adsorption studies. Comparative dye adsorption capacity onto the pristine (MWCNT-raw) and functionalized (MWCNT-COOH-11) CNTs was evaluated in aqueous solution. These results revealed that MWCNT-raw is capable of adsorbing either anionic or cationic dyes. In contrast, an induced selective cation dye adsorption capacity is significantly enhanced on multivalent hydrophilic MWCNT-COOH, in comparison to a pristine surface. This ability can be tuned to the selective adsorption of cations over anionic dyes or between anionic mixtures from binary systems. An insight into adsorbate-adsorbent interactions shows that hierarchical supramolecular interactions dominate the adsorption processes, which is ascribed to the chemical modification by switching from a hydrophobic to a hydrophilic surface, dye charge, temperature, and potential matching multivalent acceptor/donor capacity between chemical groups in the adsorbent interface. The dye adsorption isotherm and thermodynamics on both surfaces were also studied. Changes in the Gibbs free energy (ΔG°), enthalpy (ΔH°), and entropy (ΔS°) were evaluated. Thermodynamic parameters were endothermic on MWCNT-raw, whereas the adsorption process on MWCNT-COOH-11 revealed that adsorption processes were spontaneous and exothermic, accompanied by a significant reduction of entropy values as a consequence of a multivalent effect. This approach provides an eco-friendly, low-cost alternative for the preparation of supramolecular nanoadsorbents with unprecedented properties to achieve remarkable selective adsorption independent of the presence of intrinsic porosity.
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Affiliation(s)
- José Arévalo-Fester
- Instituto
Zuliano de Investigaciones Tecnológicas (INZIT), Km 15, La Cañada de Urdaneta, Estado Zulia 4001, Venezuela
- Instituto
Venezolano de Investigaciones Científicas (IVIC), Centro de
Química, Laboratorio de Síntesis y Caracterización
de Nuevos Materiales. P.O. Box 21817, Caracas 1020-A, Venezuela
| | - Alexander Briceño
- Instituto
Venezolano de Investigaciones Científicas (IVIC), Centro de
Química, Laboratorio de Síntesis y Caracterización
de Nuevos Materiales. P.O. Box 21817, Caracas 1020-A, Venezuela
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4
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Ma Y, Wang L, Liu D, Liu Y, Yang G, Qian Y, Lei W. Functionalized MoO 3 Nanosheets for High-Efficiency RhB Removal. GLOBAL CHALLENGES (HOBOKEN, NJ) 2023; 7:2200154. [PMID: 36910469 PMCID: PMC10000286 DOI: 10.1002/gch2.202200154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/28/2022] [Indexed: 06/18/2023]
Abstract
2D nanostructured materials have been applied for water purification in the past decades due to their excellent separation and adsorption performance. However, the functional 2D nanostructured molybdenum trioxide (MoO3)has rarely been reported for the removal of dyes. Here, functionalized MoO3 (F-MoO3) nanosheets are successfully fabricated with a high specific surface area (106 cc g-1) by a one-step mechanochemical exfoliation method as a highly effective adsorbent for removing dyes from water. According to the Raman, X-ray photoelectron spectroscopy, Fourier transform infrared (FTIR), and selected area electron diffraction analysis, functional groups (hdroxyl groups, amide groups, amine groups and amino groups) are identified in the as-prepared F-MoO3 nanosheets. The attached functional groups not only facilitate the dispersal ability of F-MoO3 nanosheets but also enhance the adsorption capacities. Thus, the performance (up to 556 mg g-1 when the initial concentration of Rhodamine B solution is 100 mg L-1) of as-prepared F-MoO3 nanosheets is almost two times higher than other reported MoO3 materials. Furthermore, the FTIR spectra, isotherm, and several factors (e.g., adsorbent dosage and adsorbate dosage) are also systematically investigated to explore the adsorption mechanism. Therefore, this work demonstrates that the F-MoO3 nanosheets are a promising candidate for wastewater treatment.
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Affiliation(s)
- Yuxi Ma
- Institute for Frontier MaterialsDeakin UniversityLocked Bag 20000GeelongVictoria3220Australia
| | - Lifeng Wang
- Institute for Frontier MaterialsDeakin UniversityLocked Bag 20000GeelongVictoria3220Australia
| | - Dan Liu
- Institute for Frontier MaterialsDeakin UniversityLocked Bag 20000GeelongVictoria3220Australia
| | - Yuchen Liu
- Institute for Frontier MaterialsDeakin UniversityLocked Bag 20000GeelongVictoria3220Australia
| | - Guoliang Yang
- Institute for Frontier MaterialsDeakin UniversityLocked Bag 20000GeelongVictoria3220Australia
| | - Yijun Qian
- Institute for Frontier MaterialsDeakin UniversityLocked Bag 20000GeelongVictoria3220Australia
| | - Weiwei Lei
- Institute for Frontier MaterialsDeakin UniversityLocked Bag 20000GeelongVictoria3220Australia
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5
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Palanisamy G, Bhuvaneswari K, Bharathi G, Pazhanivel T, Grace AN, Pasha SKK. Construction of magnetically recoverable ZnS-WO 3-CoFe 2O 4 nanohybrid enriched photocatalyst for the degradation of MB dye under visible light irradiation. CHEMOSPHERE 2021; 273:129687. [PMID: 33497986 DOI: 10.1016/j.chemosphere.2021.129687] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 01/11/2021] [Accepted: 01/15/2021] [Indexed: 06/12/2023]
Abstract
Easily recyclable photocatalysts have received considerable attention for their practical application, in order to address the wastewater treatments. Here, we report efficient and magnetically recyclable ZnS-WO3-CoFe2O4 nanohybrid prepared through wet impregnation method. The photophysical and optical properties of as-prepared photocatalysts was investigated by different spectroscopic techniques. The photocatalytic activity of as synthesized samples were assessed by the photodegradation of methylene blue (MB) dye under visible light irradiation. Amongst, ZnS-WO3-CoFe2O4 nanohybrid exhibit higher photodegradation activity than the other bare and hybrid samples. The enhanced light absorption and lower emission intensity provide the improved photocatalytic activity of ZnS-WO3-CoFe2O4 nanohybrid. The ZnS-WO3-CoFe2O4 nanohybrid exhibit excellent photostability after four consecutive cycles. The ferromagnetic behavior of the hybrid sample using easily recover from the dye solution using an external bar magnet.
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Affiliation(s)
- G Palanisamy
- Smart Materials Interface Laboratory, Department of Physics, Periyar University, Salem, 636 011, Tamilnadu, India
| | - K Bhuvaneswari
- Smart Materials Interface Laboratory, Department of Physics, Periyar University, Salem, 636 011, Tamilnadu, India
| | - G Bharathi
- Key Laboratory of Optoelectronic Devices and Systems of Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong Province, 518060, PR China
| | - T Pazhanivel
- Smart Materials Interface Laboratory, Department of Physics, Periyar University, Salem, 636 011, Tamilnadu, India.
| | - Andrews Nirmala Grace
- Centre for Nanotechnology Research, Vellore Institute of Technology, Vellore, 632 014, Tamil Nadu, India
| | - S K Khadheer Pasha
- Department of Physics, Vellore Institute of Technology (Amaravati Campus), Amaravati, 522501, Guntur, Andhra Pradesh, India
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6
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Sarwar S, Ali A, Liu Z, Li J, Uprety S, Lee H, Wang R, Park M, Bozack MJ, Adamczyk AJ, Zhang X. Towards thermoneutral hydrogen evolution reaction using noble metal free molybdenum ditelluride/graphene nanocomposites. J Colloid Interface Sci 2021; 581:847-859. [PMID: 32818685 DOI: 10.1016/j.jcis.2020.07.122] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 07/23/2020] [Accepted: 07/24/2020] [Indexed: 11/18/2022]
Abstract
The development of efficient electrocatalysts for hydrogen generation is an essential task to meet future energy demand. In recent years, molybdenum ditelluride (MoTe2) has triggered incredible research interests due to intrinsic nontrivial band gap with promising semi-metallic behaviors. In this work, 2D MoTe2 nanosheets have been synthesized uniformly on graphene substrate through ultra-fast microwave-initiated approach, that shows a superior hydrogen evolution in acidic medium with low overpotential (~150 mV), low activation energy (8.4362 ± 1.5413 kJ mol-1), along with a Tafel slope of 94.5 mV/decade. Interestingly, MoTe2/graphene exhibits the enhanced electrocatalytic stability during the long cycling test, resulting an increase in specific surface area of catalyst materials. Moreover, the results from periodic plane-wave density functional theory (DFT) indicate that, the best active sites are the corner of a Mo-atom and a critical bifunctional site comprised of adjacent Mo and Te edge atoms. Furthermore, the corresponding volcano plot reveals the near thermoneutral catalytic activity of MoTe2/graphene for hydrogen generation.
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Affiliation(s)
- Shatila Sarwar
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA.
| | - Ashraf Ali
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA.
| | - Zhongqi Liu
- Department of Metallurgical and Materials Engineering, University of Alabama, Tuscaloosa, AL 35487, USA.
| | - Junhao Li
- Department of Metallurgical and Materials Engineering, University of Alabama, Tuscaloosa, AL 35487, USA.
| | - Sunil Uprety
- Department of Physics, Auburn University, Auburn, AL 36849, USA.
| | - Horyun Lee
- Department of Physics, Auburn University, Auburn, AL 36849, USA.
| | - Ruigang Wang
- Department of Metallurgical and Materials Engineering, University of Alabama, Tuscaloosa, AL 35487, USA.
| | - Minseo Park
- Department of Physics, Auburn University, Auburn, AL 36849, USA.
| | - Michael J Bozack
- Department of Physics, Auburn University, Auburn, AL 36849, USA.
| | - Andrew J Adamczyk
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA.
| | - Xinyu Zhang
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA.
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7
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Khlyustova A, Sirotkin N, Kraev A, Titov V, Agafonov A. Plasma-liquid synthesis of MoO x and WO 3 as potential photocatalysts. Dalton Trans 2020; 49:6270-6279. [PMID: 32329498 DOI: 10.1039/d0dt00834f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Plasmas in contact with liquids represent a green chemistry method for the synthesis of metal oxides. In this work, underwater plasma was used for the synthesis of molybdenum and tungsten oxides. The obtained samples were analyzed by various techniques. Results showed that underwater plasma with Mo electrodes allows obtaining non-stoichiometric molybdenum oxide (MoOx). In the case of tungsten electrodes, monoclinic WO3 was formed. The synthesized oxides have a wide band gap (3.21 eV for MoOx and 3.27 eV for WO3). The photocatalytic and sorption activities of the synthesized oxides towards the decomposition of cationic and anionic dyes (Methylene Blue, Rhodamine B, and Reactive Red 6C) were studied. MoOx shows excellent photocatalytic performance under UV and visible light irradiation. The photocatalytic activity of WO3 under visible light is less than that under UV irradiation.
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Affiliation(s)
- Anna Khlyustova
- G. A. Krestov Institute of Solution Chemistry, Academicheskaja, str., 1, Ivanovo, 153045, Russia.
| | - Nikolay Sirotkin
- G. A. Krestov Institute of Solution Chemistry, Academicheskaja, str., 1, Ivanovo, 153045, Russia.
| | - Anton Kraev
- G. A. Krestov Institute of Solution Chemistry, Academicheskaja, str., 1, Ivanovo, 153045, Russia.
| | - Valeriy Titov
- G. A. Krestov Institute of Solution Chemistry, Academicheskaja, str., 1, Ivanovo, 153045, Russia.
| | - Alexander Agafonov
- G. A. Krestov Institute of Solution Chemistry, Academicheskaja, str., 1, Ivanovo, 153045, Russia.
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8
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Tahmasebi N, Khalildashti M. Synthesis of MoOx nanostructures with the assistance of polymeric surfactants for dye removal from water. KOREAN J CHEM ENG 2020. [DOI: 10.1007/s11814-019-0469-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Saghian M, Dehghanpour S, Sharbatdaran M. Unique and efficient adsorbents for highly selective and reverse adsorption and separation of dyes via the introduction of SO3H functional groups into a metal–organic framework. RSC Adv 2020; 10:9369-9377. [PMID: 35497208 PMCID: PMC9050141 DOI: 10.1039/c9ra10840h] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 02/14/2020] [Indexed: 11/30/2022] Open
Abstract
In this study, an unsaturated Cu-based MOF, HKUST (Cu3(BTC)2), was fabricated and modified with sulfonate groups in two steps, leading to the construction of a novel sulfo-functionalized MOF. The prepared framework was utilized in the adsorption and separation of various organic dyes (MB, Er, FS, and MV). The adsorption process represented intriguing features due to the introduction of the SO3H functional groups into the framework. Such an attractive feature has rarely been depicted in previous works. In addition to the substantially increased adsorption capacity of the modified framework compared with that of pristine MOF, a reverse and selective phenomenon was perceived in the cases of FS and MV. The sulfo-functionalized MOF could adsorb MV with high adsorption capacity but barely adsorbed FS, and the opposite condition was observed for pristine MOF. In addition, the prepared framework showed high selectivity in a mixed solution of dyes. On the other hand, the modified framework had no role in the first step of the adsorption and separation process and showed the same behavior as pristine MOF. Furthermore, the sulfonate functional groups could not be directly incorporated into HKUST. The experimental data followed the pseudo-second-order kinetics and the Langmuir isotherm model. Thermodynamic studies demonstrated an exothermic spontaneous mechanism for the dye adsorption process. The prepared adsorbents were capable of being recycled for four sequential cycles. Hereupon, this study presents a notably efficacious approach for the reverse performance of frameworks for the dye adsorption and separation process. A novel sulfo-functionalized MOF was utilized as an efficient adsorbent for a reversal in the removal and selective separation of dyes from contaminated water.![]()
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10
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Gusain R, Gupta K, Joshi P, Khatri OP. Adsorptive removal and photocatalytic degradation of organic pollutants using metal oxides and their composites: A comprehensive review. Adv Colloid Interface Sci 2019; 272:102009. [PMID: 31445351 DOI: 10.1016/j.cis.2019.102009] [Citation(s) in RCA: 193] [Impact Index Per Article: 38.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Revised: 07/31/2019] [Accepted: 08/05/2019] [Indexed: 02/06/2023]
Abstract
Metal oxide nanomaterials and their composites are comprehensively reviewed for water remediation. The controlled morphological and textural features, variable surface chemistry, high surface area, specific crystalline nature, and abundant availability make the nanostructured metal oxides and their composites highly selective materials for efficient removal of organic pollutants based on adsorption and photocatalytic degradation. A wide range of metal oxides like iron oxides, magnesium oxide, titanium oxides, zinc oxides, tungsten oxides, copper oxides, metal oxides composites, and graphene-metal oxides composites having variable structural, crystalline and morphological features are reviewed emphasizing the recent development, challenges, and opportunities for adsorptive removal and photocatalytic degradation of organic pollutants viz. dyes, pesticides, phenolic compounds, and so on. It also covers the deep discussion on the photocatalytic mechanism of metal oxides and their composites along with the properties relevant to photocatalysis. High photodegradation efficiency, economically-viable approaches for the preparation of photocatalytic materials, and controlled band-gap engineering make metal oxides highly efficient photocatalysts for degradation of organic pollutants. The review would be an excellent resource for researchers who are currently focusing on metal oxides-based materials for water remediation as well as for those who are interested in adsorptive and photocatalytic applications of metal oxides and their composites.
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Affiliation(s)
- Rashi Gusain
- Chemical and Material Sciences Division, CSIR-Indian Institute of Petroleum, Dehradun 248005, India
| | - Kanika Gupta
- Chemical and Material Sciences Division, CSIR-Indian Institute of Petroleum, Dehradun 248005, India; Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - Pratiksha Joshi
- Chemical and Material Sciences Division, CSIR-Indian Institute of Petroleum, Dehradun 248005, India; Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - Om P Khatri
- Chemical and Material Sciences Division, CSIR-Indian Institute of Petroleum, Dehradun 248005, India; Academy of Scientific and Innovative Research, Ghaziabad 201002, India.
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11
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Zhang B, Ji J, Liu X, Li C, Yuan M, Yu J, Ma Y. Rapid adsorption and enhanced removal of emodin and physcion by nano zirconium carbide. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 647:57-65. [PMID: 30077855 DOI: 10.1016/j.scitotenv.2018.07.422] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 06/29/2018] [Accepted: 07/30/2018] [Indexed: 06/08/2023]
Abstract
In this study, nano zirconium carbide (n-ZrC) was synthesized by preceramic polymers method, and it was used to adsorb emodin and physcion from solutions for the first time. The prepared material was characterized by various technologies. The adsorption experiment was carried out to investigate the emodin and physcion removal performance. The results indicate that the pseudo-second-order kinetic model and the Langmuir model correlated satisfactorily to the experimental data, and the thermodynamic parameters are also calculated. Especially, n-ZrC can remove >95% of emodin or physcion in a minute under the optimal conditions, it is the fastest adsorption rate compared to other commonly used adsorbents (commercial zirconium carbide, activated carbon, C18, PSA, GCB and florisil). The adsorption mechanism was discussed, which suggests that Van der Waals' forces are the primary driving power during the adsorption process. Moreover, n-ZrC is stable at different pH and it can be reused at least fifteen times.
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Affiliation(s)
- Bingjie Zhang
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China.
| | - Jiawen Ji
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Xue Liu
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China.
| | - Changsheng Li
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China.
| | - Meng Yuan
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China.
| | - Jingyang Yu
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
| | - Yongqiang Ma
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China.
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12
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Cao Y, Wang H, Ren X, Li F, Wang J, Ding R, Wang L, Wu J, Liu Z, Lv B. Fe containing MoO3 nanowires grown along the [110] direction and their fast selective adsorption of quasi-phenothiazine dyes. CrystEngComm 2019. [DOI: 10.1039/c9ce00917e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, MoO3 nanowires (Fe–MoO3 NWs) along the [110] direction were successfully synthesized in the presence of Fe3+ cations.
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13
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Jia XJ, Wang J, Wu J, Teng W, Zhao B, Li H, Du Y. Facile synthesis of MoO2/CaSO4 composites as highly efficient adsorbents for congo red and rhodamine B. RSC Adv 2018; 8:1621-1631. [PMID: 35540873 PMCID: PMC9077254 DOI: 10.1039/c7ra11292k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 12/20/2017] [Indexed: 12/03/2022] Open
Abstract
A novel rod-shaped MoO2/CaSO4 composite was prepared by using hexa-ammonium molybdate and flue gas desulfurization gypsum via a simple mixed-solvothermal route. In this composite, CaSO4 matrices are decorated with MoO2 nanoparticles, and non-structural mesopores are formed via particle packing. Moreover, it displays an excellent adsorption capability towards anionic congo red (CR) and cationic rhodamine B (RhB). The adsorption quantities per unit mass and removal efficiencies of the two dyes are significantly influenced by adsorbent dose, solution pH, and temperature. The adsorption isotherm data can be best fitted by the Langmuir model, and the calculated maximum adsorption quantities at 303.5 K are 853.54 mg g−1 for CR and 86.38 mg g−1 for RhB, respectively, which are superior to other common adsorbents. The corresponding kinetic data can be well matched with the pseudo-second-order model. Additionally, the CR adsorption is an exothermic process, while the RhB adsorption is an endothermic process. Both of them are multi-step chemisorption processes influenced by surface adsorption and intra-particle diffusion. This MoO2/CaSO4 composite can be applied as an alternative adsorbent for removing organic dyestuffs from printing and dyeing wastewater. A new kind of rod-shaped MoO2/CaSO4 composite, in which MoO2 nanoparticles are supported on the surface of CaSO4 matrices, was prepared via a mixed-solvothermal method for efficient removal towards congo red and rhodamine B.![]()
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Affiliation(s)
- Xin-Jian Jia
- Key Laboratory of Advanced Functional Materials for Ministry of Education
- College of Materials Science and Engineering
- Beijing University of Technology
- Beijing 100124
- China
| | - Jinshu Wang
- Key Laboratory of Advanced Functional Materials for Ministry of Education
- College of Materials Science and Engineering
- Beijing University of Technology
- Beijing 100124
- China
| | - Junshu Wu
- Key Laboratory of Advanced Functional Materials for Ministry of Education
- College of Materials Science and Engineering
- Beijing University of Technology
- Beijing 100124
- China
| | - Weili Teng
- Key Laboratory of Advanced Functional Materials for Ministry of Education
- College of Materials Science and Engineering
- Beijing University of Technology
- Beijing 100124
- China
| | - Bingxin Zhao
- Key Laboratory of Advanced Functional Materials for Ministry of Education
- College of Materials Science and Engineering
- Beijing University of Technology
- Beijing 100124
- China
| | - Hongyi Li
- Key Laboratory of Advanced Functional Materials for Ministry of Education
- College of Materials Science and Engineering
- Beijing University of Technology
- Beijing 100124
- China
| | - Yucheng Du
- Key Laboratory of Advanced Functional Materials for Ministry of Education
- College of Materials Science and Engineering
- Beijing University of Technology
- Beijing 100124
- China
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Guha P, Ghosh A, Thapa R, Kumar EM, Kirishwaran S, Singh R, Satyam PV. Ag nanoparticle decorated molybdenum oxide structures: growth, characterization, DFT studies and their application to enhanced field emission. NANOTECHNOLOGY 2017; 28:415602. [PMID: 28749376 DOI: 10.1088/1361-6528/aa82a8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We report a simple single step growth of α-MoO3 structures and energetically suitable site specific Ag nanoparticle (NP) decorated α-MoO3 structures on varied substrates, having almost similar morphologies and oxygen vacancies. We elucidate possible growth mechanisms in light of experimental findings and density functional theory (DFT) calculations. We experimentally establish and verified by DFT calculations that the MoO3(010) surface is a weakly interacting and stable surface compared to other orientations. From DFT study, the binding energy is found to be higher for (100) and (001) surfaces (∼-0.98 eV), compared to the (010) surface (∼-0.15 eV) and thus it is likely that Ag NP formation is not favorable on the MoO3(010) surface. The Ag decorated MoO3 (Ag-MoO3) nanostructured sample shows enhanced field emission properties with an approimately 2.1 times lower turn-on voltage of 1.67 V μm-1 and one order higher field enhancement factor (β) of 8.6 × 104 compared to the MoO3 sample without Ag incorporation. From Kelvin probe force microscopy measurements, the average local work function (Φ) is found to be approximately 0.47 eV smaller for the Ag-MoO3 sample (∼5.70 ± 0.05 eV) compared to the MoO3 sample (∼6.17 ± 0.05 eV) and the reduction in Φ can be attributed to the shifting Fermi level of MoO3 toward vacuum via electron injection from Ag NPs to MoO3. The presence of oxygen vacancies together with Ag NPs lead to the highest β and lowest turn-on field among the reported values under the MoO3 emitter category.
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Affiliation(s)
- Puspendu Guha
- Institute of Physics, Sachivalaya Marg, Bhubaneswar 751005, Odisha, India. Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400085, India
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