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The Effect of Lithium on NiMo/Al2O3 Hydrotreating Catalysts Prepared from Heteropolycompounds. Catal Letters 2023. [DOI: 10.1007/s10562-023-04315-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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2
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Xie Y, Bao J, Song X, Sun X, Ning P, Wang C, Wang F, Ma Y, Fan M, Li K. Catalysts for gaseous organic sulfur removal. JOURNAL OF HAZARDOUS MATERIALS 2023; 442:130029. [PMID: 36166909 DOI: 10.1016/j.jhazmat.2022.130029] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 08/16/2022] [Accepted: 09/17/2022] [Indexed: 06/16/2023]
Abstract
Organic sulfur gases (COS, CS2 and CH3SH) are widely present in reducing industrial off-gases, and these substances pose difficulties for the recovery of carbon monoxide and other gases. The reaction pathways and reaction mechanisms of organic sulfur on different catalyst surfaces have yet to be fully summarized. The literature shows that many factors, such as catalyst synthesis method, loaded metal composition, number of surface hydroxyl groups, number of acid-base sites and methods of surface modification, have important effects on the catalytic performance of metal catalysts. Therefore, this paper presents a comprehensive review of the research on the application of catalysts such as zeolites, metal oxides, carbon-based materials, and hydrotalcite-like derivatives in the field of organic sulfur removal. Future research prospects are summarized, more in situ characterization experiments and theoretical calculations are needed for the catalytic decomposition of methanethiol to analyze the coke generation pathways at the microscopic level, while the simultaneous removal of multiple organic sulfur gases needs to be focused on. Based on previous catalyst research, we propose possible innovations in catalyst design, desulfurization technology and organic sulfur resource utilization technology.
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Affiliation(s)
- Yuxuan Xie
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Jiacheng Bao
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Xin Song
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Xin Sun
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Ping Ning
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Chi Wang
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Fei Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Yixing Ma
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Maohong Fan
- Department of Chemical Engineering and Department of Petroleum Engineering, University of Wyoming, Laramie, WY 82071, USA.
| | - Kai Li
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China.
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Jin G, Li K, Zhang L, Luo Y, Chen D, He D. In situ observation of the promoting effect of H2S on the formation of efficient MoS2 catalyst for CH4/CO2 reforming. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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4
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Synthesis of Oxygenated Hydrocarbons from Ethanol over Sulfided KCoMo-Based Catalysts: Influence of Novel Fiber- and Powder-Activated Carbon Supports. Catalysts 2022. [DOI: 10.3390/catal12121497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Ethanol has become a viable feedstock for basic organic synthesis. The catalytic conversion of ethanol provides access to such chemicals as diethyl ether, ethyl acetate, and acetaldehyde. Carbonaceous materials are extensively studied as supports for heterogeneous catalysts due to their chemical and thermal stability, high surface area, and tunable texture. In this paper, ethanol conversion over K10Co3.7Mo12S-catalysts supported on novel activated carbon (AC) materials (i.e., novel powder-AC (DAS and YPK-1), fiber non-woven AC material (AHM), and fabric active sorption (TCA)) was investigated. The catalysts were prepared by the incipient wetness co-impregnation method followed by sulfidation. The catalysts were characterized by employing N2 adsorption–desorption measurements, TEM, SEM/EDX, UV–Vis spectroscopy, and XRF. Catalytic performance was assessed in a fixed-bed down-flow reactor operating at 320 °C, 2.5 MPa, and with continuous ethanol feeding in an He atmosphere. Activity is highly dependent on the support type and catalyst’s textural properties. The activity of the fiber-supported catalysts was found to be greater than the powder-supported catalysts. Ethanol conversion at T = 320 °C, P = 2.5 MPa, and GHSV = 760 L h−1 kgcat−1 increased as follows: (38.7%) KCoMoS2/YPK-1 < (49.5%) KCoMoS2/DAS < (58.2%) KCoMoS2/TCA < (67.1%) KCoMoS2/AHM. Catalysts supported by powder-AC enhanced the formation of MoS2-crystallites, whereas the high acidity of fiber-AC seemed to inhibit the formation of MoS2-crystallites. Simultaneously, a high surface area and a microporous catalytic structure enhance the formation of oxygenates from hydrocarbons. The dehydration and dehydrogenation reactions, which led to the creation of ethene and acetaldehyde, were shown to require a highly acidic catalyst, while the synthesis of ethyl acetate and higher alcohols required a less acidic catalyst.
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Template-free hydrothermal synthesis of hollow alumina microspheres and its excellent catalytic properties for thiolation. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.11.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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6
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Alkali-induced metal-based coconut shell biochar for efficient catalytic removal of H2S at a medium-high temperature in blast furnace gas with significantly enhanced S selectivity. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Dipheko TD, Maximov VV, Permyakov EA, Osman ME, Cherednichenko AG, Kogan V. Ethanol dehydrogenation over (K)(Co)MoS2catalysts supported on activated carbon: Effect of active phase composition. SOUTH AFRICAN JOURNAL OF CHEMICAL ENGINEERING 2022. [DOI: 10.1016/j.sajce.2022.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Zhu J, Hu L, He J, Cui H. Ethyl mercaptan removal from gas streams using regenerable Co/Fe modified hexaniobate nanotubes. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Spindle-shaped nanoclusters self-assembled into bayberry-like hollow alumina microspheres for efficient catalytic hydrogenation of CS2 to CH3SH. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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The nature of K-induced 2H and 1T’-MoS2 species and their phase transition behavior for the synthesis of methanethiol (CH3SH). iScience 2022; 25:104999. [PMID: 36097616 PMCID: PMC9463583 DOI: 10.1016/j.isci.2022.104999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 06/20/2022] [Accepted: 08/17/2022] [Indexed: 11/21/2022] Open
Abstract
The one-step reaction approach from syngas with hydrogen sulfide (CO/H2/H2S) over potassium (K) promoted Molybdenum disulfide (MoS2) materials can provide alternatives for the synthesis of methanethiol (CH3SH). However, the direct confirmation and determination of the real active nature of K-induced 2H and 1T′-MoS2 for this reaction and the corresponding phase transformation behavior and origin of K-induced 2H-MoS2 from/to 1T′-MoS2 remains unclear. Herein, we proved at the atomic level the precise position of K over 1T′-MoS2 and 2H-MoS2 species using the technique of HAADF-STEM. A relationship between K-induced 1T′ and 2H-MoS2 phases and the catalytic property to synthesize CH3SH was established, and K-intercalated 1T′-MoS2 phase was confirmed to have excellent catalytic performances. Moreover, the behavior, origin, and influencing factors of phase transformation of 2H-MoS2 from/to 1T′-MoS2 in the existence of K were well proved. Converting sulfur-containing pollutants with syngas (CO/H2/H2S) is promising Thermally induced K-position-dependent phase transformation of MoS2 was reported The precise position of K over MoS2 was proved at the atomic level Relationship between MoS2 phases and property for synthesizing CH3SH was established
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Yang T, Yao M, Ma J, Chen P, Zhao T, Yang C, Liu F, Cao J. Role of Zirconia in Oxide-Zeolite Composite for Thiolation of Methanol with Hydrogen Sulfide to Methanethiol. NANOMATERIALS 2022; 12:nano12111803. [PMID: 35683659 PMCID: PMC9181951 DOI: 10.3390/nano12111803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/19/2022] [Accepted: 05/23/2022] [Indexed: 11/17/2022]
Abstract
In this paper, the molecular sieve NaZSM-5 was modified with zirconium dioxide (ZrO2) by a hydrothermal coating process and other methods. By comparing the effects of the crystal phase structure of ZrO2 and the compositing method on the physicochemical properties and catalytic performance of the obtained composites, the structure–performance relationship of these composite catalysts was revealed. The results indicate that in the hydrothermal system used for the preparation of NaZSM-5, Zr4+ is more likely to dissolve from m-ZrO2 than from t-ZrO2, which can subsequently enter the molecular sieve, causing a greater degree of desiliconization of the framework. The larger specific surface area (360 m2/g) and pore volume (0.52 cm3/g) of the m-ZrO2/NaZSM-5 composite catalyst increase the exposure of its abundant acidic (0.078 mmol/g) and basic (0.081 mmol/g) active centers compared with other composites. Therefore, this catalyst exhibits a shorter induction period and better catalytic performance. Furthermore, compared with the impregnation method and mechanochemical method, the hydrothermal coating method produces a greater variety of acid–base active centers in the composite catalyst due to the hydrothermal modifying effect.
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Affiliation(s)
- Tinglong Yang
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China; (T.Y.); (M.Y.); (J.M.); (P.C.); (T.Z.); (C.Y.)
- Guizhou Key Laboratory for Green Chemical and Clean Energy Technology, Guiyang 550025, China
| | - Mengqin Yao
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China; (T.Y.); (M.Y.); (J.M.); (P.C.); (T.Z.); (C.Y.)
- Guizhou Key Laboratory for Green Chemical and Clean Energy Technology, Guiyang 550025, China
| | - Jun Ma
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China; (T.Y.); (M.Y.); (J.M.); (P.C.); (T.Z.); (C.Y.)
- Guizhou Key Laboratory for Green Chemical and Clean Energy Technology, Guiyang 550025, China
| | - Peng Chen
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China; (T.Y.); (M.Y.); (J.M.); (P.C.); (T.Z.); (C.Y.)
- Guizhou Key Laboratory for Green Chemical and Clean Energy Technology, Guiyang 550025, China
| | - Tianxiang Zhao
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China; (T.Y.); (M.Y.); (J.M.); (P.C.); (T.Z.); (C.Y.)
- Guizhou Key Laboratory for Green Chemical and Clean Energy Technology, Guiyang 550025, China
| | - Chunliang Yang
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China; (T.Y.); (M.Y.); (J.M.); (P.C.); (T.Z.); (C.Y.)
- Guizhou Key Laboratory for Green Chemical and Clean Energy Technology, Guiyang 550025, China
| | - Fei Liu
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China; (T.Y.); (M.Y.); (J.M.); (P.C.); (T.Z.); (C.Y.)
- Guizhou Key Laboratory for Green Chemical and Clean Energy Technology, Guiyang 550025, China
- Correspondence: (F.L.); (J.C.)
| | - Jianxin Cao
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China; (T.Y.); (M.Y.); (J.M.); (P.C.); (T.Z.); (C.Y.)
- Guizhou Key Laboratory for Green Chemical and Clean Energy Technology, Guiyang 550025, China
- Correspondence: (F.L.); (J.C.)
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13
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He JX, Xiao YS, Liu C, Zhu ML, Song YH, Liu ZW. Elucidating the layer-number impact of MoS2 on the adsorption and hydrogenation of CO. J Catal 2021. [DOI: 10.1016/j.jcat.2021.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Synthesis of Methyl Mercaptan on Mesoporous Alumina Prepared with Hydroxysafflor Yellow A as Template: The Synergistic Effect of Potassium and Molybdenum. Catalysts 2021. [DOI: 10.3390/catal11111365] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
K-promoted Mo-based catalysts showed great promise for the hydrogenation of CS2 to methyl mercaptan (CH3SH). However, the research on the synergistic effect of K and Mo, and the active site of CS2 hydrogenation to CH3SH were unexplored widely. To solve this problem, the synergistic effect of K and Mo in the K-promoted Mo-based catalysts for CS2 hydrogenation to prepare CH3SH was investigated. The mesoporous alumina was the support and loaded the active components potassium and molybdenum to prepare the catalyst. The results suggested that the active components K and Mo can not only cooperatively regulate the acid-base sites on the catalyst surface, but also stabilize the molybdate species at +5 valence during the reduction process and increase the Mo unsaturated coordination sites. Combined with the results of the catalytic activity evaluation, indicating that the main active site of the catalysts is the weak Lewis acid-base site, and the strong acidic site and strong alkaline site are not conducive to the formation of CH3SH. Moreover, the possible catalytic mechanism of CS2 hydrogenation to CH3SH on the weak Lewis acid-base sites of the catalysts was proposed. The research results of this paper can provide an experimental basis and theoretical guidance for the design of high-performance CH3SH synthesis catalyst and further mechanism research.
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Acid Gas Converting to Organosulfur and Hydrogen in Methanol Thiolation Using Alkali Promoted Catalysts: Case Study. CATALYSIS SURVEYS FROM ASIA 2021. [DOI: 10.1007/s10563-021-09345-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Zhang Z, He D, Huang Z, He S, Lu J, Luo Y. Flowing-Air-Induced Transformation to Promote the Dispersion of the CrO x Catalyst for Propane Dehydrogenation. ACS APPLIED MATERIALS & INTERFACES 2021; 13:19873-19883. [PMID: 33877819 DOI: 10.1021/acsami.0c22759] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Highly dispersed chromium (Cr)-based catalysts are promising candidates for the catalytic dehydrogenation of propane (DHP). However, the easier aggregation of Cr species into crystalline Cr2O3 at the high-temperature calcination and reaction process is a big challenge, which severely restricts the improvement of activity and stability of the DHP reaction. Herein, a flowing-air-induced transformation method was first proposed, and the catalytic performance of the prepared Cr/MCM-41 catalysts was found to be significantly improved compared to that of the Cr-based catalyst prepared by the traditional calcination method, even better than that of most of the reported Cr-based catalysts and some noble metal-based catalysts. X-ray absorption spectroscopy and in situ Raman spectroscopy as well as other characterization techniques demonstrated that the in situ calcination in flowing air could not only effectively restrain the conversion of Cr(VI) into Cr(III) but also largely improve the dispersion of Cr species. Furthermore, DHP activity is found to have a positive correlation with the amount of monomeric Cr(VI) species, which is proved to be the precursor of active coordinatively unsaturated Cr sites. Our proposed flowing-air-induced transformation method provides a general strategy for preparing the highly dispersed Cr-based catalysts and other metal oxide materials with varied valence and exhibits potential application prospects in industry.
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Affiliation(s)
- Zhewei Zhang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming 650500, P. R. China
- The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, P. R. China
| | - Dedong He
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming 650500, P. R. China
- The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, P. R. China
| | - Zijun Huang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming 650500, P. R. China
- The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, P. R. China
| | - Sufang He
- Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, P. R. China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming 650500, P. R. China
- The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, P. R. China
| | - Jichang Lu
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming 650500, P. R. China
- The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, P. R. China
| | - Yongming Luo
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming 650500, P. R. China
- The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, P. R. China
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Xu Z, Lu J, Zheng X, Chen B, Luo Y, Tahir MN, Huang B, Xia X, Pan X. A critical review on the applications and potential risks of emerging MoS 2 nanomaterials. JOURNAL OF HAZARDOUS MATERIALS 2020; 399:123057. [PMID: 32521321 DOI: 10.1016/j.jhazmat.2020.123057] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 05/21/2020] [Accepted: 05/25/2020] [Indexed: 06/11/2023]
Abstract
Molybdenum disulfide (MoS2) nanomaterials have been widely used in various fields such as energy store and transformation, environment protection, and biomedicine due to their unique physicochemical properties. Unfortunately, such large-scale production and use of MoS2 nanomaterials would inevitably release into the environmental system and then potentially increase the risks of wildlife/ecosystem and human beings as well. In this review, we first introduce the physicochemichemical properties, synthetic methods and environmental behaviors of MoS2 nanomaterials and their typical functionalized materials, then summarize their environmental and biomedical applications, next assess their potential health risks, covering in vivo and in vitro studies, along with the underlying toxicological mechanisms, and last point out some special phenomena about the balance between applications and potential risks. This review aims to provide guidance for harm predication induced by MoS2 nanomaterials and to suggest prevention measures based on the recent research progress of MoS2' applications and exerting toxicological data.
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Affiliation(s)
- Zhixiang Xu
- Faulty of Environmental Science & Engineering, Kunming University of Science and Technology, Kunming 650500, China; Faculty of Life Science & Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Jichang Lu
- Faulty of Environmental Science & Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Xianyao Zheng
- Faulty of Environmental Science & Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Bo Chen
- Faulty of Environmental Science & Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Yongming Luo
- Faulty of Environmental Science & Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Muhammad Nauman Tahir
- Faulty of Environmental Science & Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Bin Huang
- Faulty of Environmental Science & Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Xueshan Xia
- Faculty of Life Science & Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Xuejun Pan
- Faulty of Environmental Science & Engineering, Kunming University of Science and Technology, Kunming 650500, China.
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Lu J, Fang J, Xu Z, He D, Feng S, Li Y, Wan G, He S, Wu H, Luo Y. Facile synthesis of few-layer and ordered K-promoted MoS2 nanosheets supported on SBA-15 and their potential application for heterogeneous catalysis. J Catal 2020. [DOI: 10.1016/j.jcat.2020.03.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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20
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Effect of Promoter Nature on Synthesis Gas Conversion to Alcohols over (K)MeMoS
2
/Al
2
O
3
Catalysts. ChemCatChem 2020. [DOI: 10.1002/cctc.201901698] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Jiang J, Shen Q, Xue P, Qi H, Wu Y, Teng Y, Zhang Y, Liu Y, Zhao X, Liu X. A Highly Sensitive and Stable SERS Sensor for Malachite Green Detection Based on Ag Nanoparticles In Situ Generated on 3D MoS
2
Nanoflowers. ChemistrySelect 2020. [DOI: 10.1002/slct.201903924] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jiayu Jiang
- State Key laboratory of Inorganic Synthesis and Preparative Chemistry, College of ChemistryJilin University, 2699 Qianjin Street Changchun 130012 P. R. China
| | - Qihui Shen
- Department of Chemistry and Pharmaceutical EngineeringJilin Institute of Chemical Technology 45 Chengde Street Jilin 132022 P. R. China
| | - Peng Xue
- State Key laboratory of Inorganic Synthesis and Preparative Chemistry, College of ChemistryJilin University, 2699 Qianjin Street Changchun 130012 P. R. China
| | - Hui Qi
- the Second Hospital of Jilin UniversityJilin University Changchun 130012 P. R. China
| | - Yunpeng Wu
- State Key laboratory of Inorganic Synthesis and Preparative Chemistry, College of ChemistryJilin University, 2699 Qianjin Street Changchun 130012 P. R. China
| | - Yifei Teng
- State Key laboratory of Inorganic Synthesis and Preparative Chemistry, College of ChemistryJilin University, 2699 Qianjin Street Changchun 130012 P. R. China
| | - Yuwan Zhang
- State Key laboratory of Inorganic Synthesis and Preparative Chemistry, College of ChemistryJilin University, 2699 Qianjin Street Changchun 130012 P. R. China
| | - Yan Liu
- Department of Chemistry and Pharmaceutical EngineeringJilin Institute of Chemical Technology 45 Chengde Street Jilin 132022 P. R. China
| | - Xudong Zhao
- State Key laboratory of Inorganic Synthesis and Preparative Chemistry, College of ChemistryJilin University, 2699 Qianjin Street Changchun 130012 P. R. China
| | - Xiaoyang Liu
- State Key laboratory of Inorganic Synthesis and Preparative Chemistry, College of ChemistryJilin University, 2699 Qianjin Street Changchun 130012 P. R. China
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Dibenzothiophene Hydrodesulfurization over P-CoMo on Sol-Gel Alumina Modified by La Addition. Effect of Rare-Earth Content. Catalysts 2019. [DOI: 10.3390/catal9040359] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Alumina-lanthana (La at 1, 3, or 5 wt%) supports were prepared by sol-gel from Al alkoxide sol where La(NO3)3 was added. Annealed (550 °C) xerogels were characterized by N2 physisorption, thermal analysis (TG-DTA), X-ray diffraction (XRD), scanning electron microscopy- energy dispersive spectroscopy (SEM-EDS), CO2-adsorption studied in IR region, Raman and ultraviolet-vis (UV-vis) spectroscopies. The texture of amorphous binary matrices of high La dispersion was adequate to applications in catalysts for middle distillates hydrodesulfurization (HDS). Generally, the amount and strength of surface basic sites increased with La content in solids. Mo (at 2.8 at. nm−2) and Co (at Co/(Co+Mo) = 0.3) were deposited over carriers by one-pot simultaneous impregnation in the presence of PO43− (P2O5/(NiO+MoO3) = 0.2 mass ratio). Calcined (400 °C) Co-Mo-P impregnated precursors had decreased basicity as to that of corresponding carriers, suggesting strong La-deposited species interaction. As La content in carriers increased Mo=O Raman stretching vibrations shifted to lower wave-numbers (949 to 935 cm−1) suggesting octahedral molybdates coordination change to tetrahedral. Although La at the lowest concentration (1 wt%) enhanced dibenzothiophene, HDS (~38% higher as to the Al2O3-supported formulation) desulfurization was significantly diminished at augmented content. Presence of hardly sulfidable tetrahedral Mo originated during impregnation at basic conditions in pores of La-modified carriers seemed to dictate observed behavior. Rare earth content in formulations enhanced selectivity to biphenyl.
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