1
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Neha, Singh H, Singh SV. Insights into the interface of NiCo 2O 4 spinel /LaCoO 3 perovskite nano-composite for CO and soot oxidation. J Environ Sci (China) 2024; 138:339-349. [PMID: 38135401 DOI: 10.1016/j.jes.2023.03.018] [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: 04/12/2022] [Revised: 03/05/2023] [Accepted: 03/11/2023] [Indexed: 12/24/2023]
Abstract
In the quest for the development of thermally stable, highly active and low-cost catalysts for use in catalyzed diesel particulate filter, nano-composites are new areas of research. Therefore, we reported the easy synthesis of spinel NiCo2O4/perovskite LaCoO3 nano-composite, and its individual oxides NiCo2O4 and LaCoO3 for comparison. The detailed insights into the physio-chemical characteristics of formed NiCo2O4/ LaCoO3 nano-composite were done based on various characterization analysis such as X-ray diffraction (XRD), Fourier transform infrared (FT-IR), N2 physiosorption, scanning electron microscopy-energy dispersive spectroscopy (SEM-EDX), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The characterization analysis of NiCo2O4/LaCoO3 revealed the successful formation of a chemical interface possessing strong interfacial interaction, resulting in desirable physicochemical characteristics such as small crystallite size, abundant mesoporosity, high specific surface area and activation of surface lattice oxygen. Owing to the desirable characteristics, the activity results over NiCo2O4/LaCoO3 nano-composite showed the excellent CO oxidation performance and high soot oxidation activity, recyclability and thermal stability. This work mainly attempts to emphasize the effectiveness of the facile, inexpensive and conventionally used precipitation method for the successful formation of highly efficient nano-composites.
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Affiliation(s)
- Neha
- Department of Chemical Engineering, Indian Institute of Technology (BHU), Varanasi, 221005, India.
| | - Harshita Singh
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Satya Vir Singh
- Department of Chemical Engineering, Indian Institute of Technology (BHU), Varanasi, 221005, India
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2
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Tian W, Ren P, Hou X, Xue R, Chen Z, Guo Z, Jin Y, Ren F. MnO 2 porous carbon composite from cellulose enabling high gravimetric/volumetric performance for supercapacitor. Int J Biol Macromol 2024; 261:129977. [PMID: 38316321 DOI: 10.1016/j.ijbiomac.2024.129977] [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: 12/14/2023] [Revised: 01/22/2024] [Accepted: 02/02/2024] [Indexed: 02/07/2024]
Abstract
Preparing electrode material integrated with high gravimetric/volumetric capacitance and fast electron/ion transfer is crucial for the practical application. Owing to the structural contradiction, it is a big challenge to construct electrode material with high packing density, sufficient ion transport channels, and fast electronic transfer pathways. Herein, MnO2 porous carbon composite with abundant porous structure and 3D carbon skeleton was facilely fabricated from Linum usitatissimum. L stems via NaOH activation and MnO2 introduction. The in-situ introduced MnO2 not only increases the packing density and the electrical conductivity of the porous carbon but also provides more active sites for oxidation reactions. These unique characteristics endow the resultant MnO2 porous carbon composite with remarkable gravimetric capacitance of 549 F g-1, volumetric capacitance of 378 F cm-3, and capacitance retention of 54.9 %. Giving the simple process and low cost, this work might offer a new approach for structural design and the practical application of high-performance electrode materials.
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Affiliation(s)
- Wenhui Tian
- School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, PR China
| | - Penggang Ren
- School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, PR China; The Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, PR China.
| | - Xin Hou
- School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, PR China
| | - Runzhuo Xue
- The Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, PR China
| | - Zhengyan Chen
- The Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, PR China; State Key Laboratory of Polymer Materials Engineering, Sichuan University, Sichuan 610065, PR China
| | - Zhengzheng Guo
- The Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, PR China
| | - Yanlin Jin
- The Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, PR China
| | - Fang Ren
- The Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, PR China
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3
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Alharbi SM, Alkhalifah MA, Howchen B, Rahmah ANA, Celorrio V, Fermin DJ. Activating Mn Sites by Ni Replacement in α-MnO 2. ACS MATERIALS AU 2024; 4:74-81. [PMID: 38221925 PMCID: PMC10786130 DOI: 10.1021/acsmaterialsau.3c00051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 09/01/2023] [Accepted: 10/05/2023] [Indexed: 01/16/2024]
Abstract
Transition metal oxides are characterized by an acute structure and composition dependent electrocatalytic activity toward the oxygen evolution (OER) and oxygen reduction (ORR) reactions. For instance, Mn containing oxides are among the most active ORR catalysts, while Ni based compounds tend to show high activity toward the OER in alkaline solutions. In this study, we show that incorporation of Ni into α-MnO2, by adding Ni precursor into the Mn-containing hydrothermal solution, can generate distinctive sites with different electronic configurations and contrasting electrocatalytic activity. The structure and composition of the Ni modified hollandite α-MnO2 phase were investigated by X-ray absorption spectroscopy (XAS), X-ray diffraction (XRD), transmission electron microscopy coupled to energy-dispersive X-ray spectroscopy (TEM-EDX), inductively coupled plasma-optical emission spectroscopy (ICP-OES), and X-ray photoelectron spectroscopy (XPS). Our analysis suggests that Mn replacement by Ni into the α-MnO2 lattice (site A) occurs up to approximately 5% of the total Mn content, while further increasing Ni content promotes the nucleation of separate Ni phases (site B). XAS and XRD show that the introduction of sites A and B have a negligible effect on the overall Mn oxidation state and bonding characteristics, while very subtle changes in the XPS spectra appear to suggest changes in the electronic configuration upon Ni incorporation into the α-MnO2 lattice. On the other hand, changes in the electronic structure promoted by site A have a significant impact in the pseudocapacitive responses obtained by cyclic voltammetry in KOH solution at pH 13, revealing the appearance of Mn 3d orbitals at the energy (potential) range relevant to the ORR. The evolution of Mn 3d upon Ni replacement significantly increases the catalytic activity of α-MnO2 toward the ORR. Interestingly, the formation of segregated Ni phases (site B) leads to a decrease in the ORR activity while increasing the OER rate.
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Affiliation(s)
- Sami M. Alharbi
- School
of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K.
- Department
of Chemistry, College of Science, Qassim
University, Buraydah 52571, Saudi Arabia
| | - Mohammed A. Alkhalifah
- School
of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K.
- Department
of Chemistry, College of Science, King Faisal
University, P.O. Box 380, Al-Ahsa, 31982, Saudi Arabia
| | - Benjamin Howchen
- School
of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K.
| | - Athi N. A. Rahmah
- School
of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K.
| | - Veronica Celorrio
- Diamond
Light Source Ltd., Diamond
House, Harwell Campus, Didcot OX11 0DE, U.K.
| | - David J. Fermin
- School
of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K.
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4
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Kaladi Chondath S, Menamparambath MM. Self-assembly of random networks of zirconium-doped manganese oxide nanoribbons and poly(3,4-ethylenedioxythiophene) flakes at the water/chloroform interface. Faraday Discuss 2023; 247:227-245. [PMID: 37466038 DOI: 10.1039/d3fd00077j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
Owing to their magnificent chemical and physical properties, transition metal-based heterostructures are potential materials for applications ranging from point-of-care diagnostics to sustainable energy technologies. The cryptomelane-type octahedral molecular sieves (K-OMS-2) are extensively studied porous materials with a hollandite (2 × 2 tunnel of dimensions 4.6 × 4.6 Å2) structure susceptible to the isovalent substitution of metal cations at the framework of MnO6 octahedral chains. Here we report a facile in situ synthesis of framework-level zirconium (Zr)-doped K-OMS-2 nanoribbons in poly(3,4-ethylenedioxythiophene) (PEDOT) nanoflakes at a water/chloroform interface at ambient conditions. An oxidant system of KMnO4 and ZrOCl2·8H2O initiated the polymerisation at temperatures ranging from 5° to 50 °C. The lattice distortions arising from the framework-level substitution of Mn4+ by Zr4+ in the K-OMS-2 structure were evidenced with powder X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and N2 adsorption-desorption studies. Transmission electron microscopic and mapping images confirmed that PEDOT/Zr-K-OMS-2 comprises a highly crystalline random network of two-dimensional PEDOT flakes and Zr-doped K-OMS-2 nanoribbons. In this regard, the proposed interfacial strategy affirms an in situ method for the morphological tuning of heterostructures on polymer supports at low temperatures.
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Affiliation(s)
- Subin Kaladi Chondath
- Department of Chemistry, National Institute of Technology Calicut, Calicut-673601, Kerala, India.
| | - Mini Mol Menamparambath
- Department of Chemistry, National Institute of Technology Calicut, Calicut-673601, Kerala, India.
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5
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Zuhra Z, Li S, Xie G, Wang X. Soot Erased: Catalysts and Their Mechanistic Chemistry. Molecules 2023; 28:6884. [PMID: 37836727 PMCID: PMC10574243 DOI: 10.3390/molecules28196884] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 09/25/2023] [Accepted: 09/26/2023] [Indexed: 10/15/2023] Open
Abstract
Soot formation is an inevitable consequence of the combustion of carbonaceous fuels in environments rich in reducing agents. Efficient management of pollution in various contexts, such as industrial fires, vehicle engines, and similar applications, relies heavily on the subsequent oxidation of soot particles. Among the oxidizing agents employed for this purpose, oxygen, carbon dioxide, water vapor, and nitrogen dioxide have all demonstrated effectiveness. The scientific framework of this research can be elucidated through the following key aspects: (i) This review situates itself within the broader context of pollution management, emphasizing the importance of effective soot oxidation in reducing emissions and mitigating environmental impacts. (ii) The central research question of this study pertains to the identification and evaluation of catalysts for soot oxidation, with a specific emphasis on ceria-based catalysts. The formulation of this research question arises from the need to enhance our understanding of catalytic mechanisms and their application in environmental remediation. This question serves as the guiding principle that directs the research methodology. (iii) This review seeks to investigate the catalytic mechanisms involved in soot oxidation. (iv) This review highlights the efficacy of ceria-based catalysts as well as other types of catalysts in soot oxidation and elucidate the underlying mechanistic strategies. The significance of these findings is discussed in the context of pollution management and environmental sustainability. This study contributes to the advancement of knowledge in the field of catalysis and provides valuable insights for the development of effective strategies to combat air pollution, ultimately promoting a cleaner and healthier environment.
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Affiliation(s)
- Zareen Zuhra
- Department of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China; (Z.Z.); (S.L.); (X.W.)
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
| | - Shuo Li
- Department of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China; (Z.Z.); (S.L.); (X.W.)
| | - Guanqun Xie
- Department of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China; (Z.Z.); (S.L.); (X.W.)
| | - Xiaoxia Wang
- Department of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China; (Z.Z.); (S.L.); (X.W.)
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6
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Zheng C, Bao S, Mao D, Xu Z, Zheng S. Insight into phase structure-dependent soot oxidation activity of K/MnO 2 catalyst. J Environ Sci (China) 2023; 126:668-682. [PMID: 36503792 DOI: 10.1016/j.jes.2022.05.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 05/17/2022] [Accepted: 05/24/2022] [Indexed: 06/17/2023]
Abstract
In the present study, two nanosized MnO2 with β and δ phase structures and potassium loaded MnO2 catalysts with varied K loading amounts (denoted as K/MnO2) were prepared. Temperature programmed oxidation and isothermal reactions in loose contact modes were employed to examine the soot oxidation activity of the as-prepared catalysts. Characterization results show that as compared with β-MnO2, δ-MnO2 has larger surface area and higher content of hydroxyl groups. Upon K loading, abundant hydroxyl groups in δ-MnO2 effectively sequestrate K cation to form bound K species and free K species are available only at K loading above 3.0 wt.%. In contrast, the majority of K species present as free state in β-MnO2 even at a K loading of 1.0 wt.% due to its very low hydroxyl group content. The O2 temperature-programmed desorption (O2-TPD) demonstrates that the catalysts with free K species exhibit strong ability in activating gaseous O2, whereas the catalysts only having bound K display minor O2 activation capability. As a result, despite of slightly lower activity of β-MnO2 than δ-MnO2, the K/β-MnO2 catalysts exhibit substantially higher activities than K/δ-MnO2 catalysts with identical K loadings. The finding in this study clearly demonstrates that for MnO2 based catalysts, the enhancement of catalytic activity for soot oxidation is highly K loading amount dependent and the dependency is strongly associated with the phase structure of MnO2.
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Affiliation(s)
- Changlong Zheng
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Shidong Bao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Danjun Mao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Zhaoyi Xu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Shourong Zheng
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
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7
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Peng C, Yu D, Zhang C, Chen M, Wang L, Yu X, Fan X, Zhao Z, Cheng K, Chen Y, Wei Y, Liu J. Alkali/alkaline-earth metal-modified MnO x supported on three-dimensionally ordered macroporous-mesoporous Ti xSi 1-xO 2 catalysts: Preparation and catalytic performance for soot combustion. J Environ Sci (China) 2023; 125:82-94. [PMID: 36375963 DOI: 10.1016/j.jes.2021.10.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 10/25/2021] [Accepted: 10/27/2021] [Indexed: 06/16/2023]
Abstract
The performance of catalysts used in after-treatment systems is the key factor for the removal of diesel soot, which is an important component of atmospheric fine particle emissions. Herein, three-dimensionally ordered macroporous-mesoporous TixSi1-xO2 (3DOM-m TixSi1-xO2) and its supported MnOx catalysts doped with different alkali/alkaline-earth metals (AMnOx/3DOM-m Ti0.7Si0.3O2 (A: Li, Na, K, Ru, Cs, Mg, Ca, Sr, Ba)) were prepared by mesoporous template (P123)-assisted colloidal crystal template (CCT) and incipient wetness impregnation methods, respectively. Physicochemical characterizations of the catalysts were performed using scanning electron microscopy, X-ray diffraction, N2 adsorption-desorption, H2 temperature-programmed reduction, O2 temperature-programmed desorption, NO temperature-programmed oxidation, and Raman spectroscopy techniques; then, we evaluated their catalytic performances for the removal of diesel soot particles. The results show that the 3DOM-m Ti0.7Si0.3O2 supports exhibited a well-defined 3DOM-m nanostructure, and AMnOx nanoparticles with 10-50 nm were evenly dispersed on the inner walls of the uniform macropores. In addition, the as-prepared catalysts exhibited good catalytic performance for soot combustion. Among the prepared catalysts, CsMnOx/3DOM-m Ti0.7Si0.3O2 had the highest catalytic activity for soot combustion, with T10, T50, and T90 (the temperatures corresponding to soot conversion rates of 10%, 50%, and 90%) values of 285, 355, and 393°C, respectively. The high catalytic activity of the CsMnOx/3DOM-m Ti0.7Si0.3O2 catalysts was attributed to their excellent low-temperature reducibility and homogeneous macroporous-mesoporous structure, as well as to the synergistic effects between Cs and Mn species and between CsMnOx and the Ti0.7Si0.3O2 support.
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Affiliation(s)
- Chao Peng
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, China
| | - Di Yu
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, China
| | - Chunlei Zhang
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, China
| | - Maozhong Chen
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, China
| | - Lanyi Wang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Xuehua Yu
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, China.
| | - Xiaoqiang Fan
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, China
| | - Zhen Zhao
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, China; State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China.
| | - Kai Cheng
- Energy and Catalysis Laboratory, Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Hong Kong, China
| | - Yongsheng Chen
- Energy and Catalysis Laboratory, Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Hong Kong, China
| | - Yuechang Wei
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Jian Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
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8
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Zhou C, Zhu X, Zhang F, Li X, Chen G, Zhou Z, Yang G. Soot Combustion over Cu-Co Spinel Catalysts: The Intrinsic Effects of Precursors on Catalytic Activity. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:14737. [PMID: 36429456 PMCID: PMC9690947 DOI: 10.3390/ijerph192214737] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 10/23/2022] [Accepted: 10/28/2022] [Indexed: 06/16/2023]
Abstract
In this work, a series of CuCo2O4-x (x = N, A and C) catalysts were synthesized using different metal salt precursors by urea hydrothermal method for catalytic soot combustion. The effect of CuCo2O4-x catalysts on soot conversion and CO2 selectivity in both loose and tight contact mode was investigated. The CuCo2O4-N catalyst exhibited outstanding catalytic activity with the characteristic temperatures (T10, T50 and T90) of 451 °C, 520 °C and 558 °C, respectively, while the CO2 selectivity reached 98.8% during the reaction. With the addition of NO, the soot combustion was further accelerated over all catalysts. Compared with the loose contact mode, the soot conversion was improved in the tight contact mode. The CuCo2O4-N catalysts showed better textural properties compared to the CuCo2O4-A and CuCo2O4-C, such as higher specific surface areas and pore volumes. The XRD results confirmed that the formation of a CuCo2O4 crystal phase in all catalysts. However, the CuO crystal phase only presented in CuCo2O4-N and CuCo2O4-A. The relative contents of Cu2+, Co3+ and Oads on the surface of CuCo2O4-x (x = N, A and C) catalysts were analyzed by XPS. The CuCo2O4-N catalyst displayed the highest relative content of Cu2+, Co3+ and Oads. The activity of catalytic soot combustion showed a good correlation with the order of the relative contents of Cu2+, Co3+ and Oads. Additionally, the CuCo2O4-N catalyst exhibited lower reduction temperature compared to the CuCo2O4-A and CuCo2O4-C. The cycle tests clarified that the copper-cobalt spinel catalyst obtained good stability. In addition, based on the Mars-van Krevelen mechanism, the process of catalytic soot combustion was described combined with the electron transfer process and the role of oxygen species over CuCo2O4 spinel catalysts.
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Affiliation(s)
- Chunlin Zhou
- Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China
| | - Xinbo Zhu
- Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China
| | - Fei Zhang
- Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China
| | - Xinbao Li
- Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China
| | - Geng Chen
- Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China
| | - Zijian Zhou
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Guohua Yang
- Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China
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9
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Zhu M, Wen Y, Shi L, Tan Z, Shen Y, Yin K, Sun L. Revealing the promoting effect of multiple Mn valences on the catalytic activity of CeO 2 nanorods toward soot oxidation. NANOSCALE 2022; 14:11963-11971. [PMID: 35894864 DOI: 10.1039/d2nr03101a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Mn-modified CeO2 nanomaterials have attracted extensive attention as efficient and promising catalysts for soot combustion due to their low cost and high catalytic activity. However, a detailed mechanism of how Mn promotes soot oxidation over CeO2 is still not clearly elucidated, which is crucial to further optimize the catalyst for achieving its practical applications. We here report a Mn-doped CeO2 catalyst with tunable surface Mn chemical valence states to study the Mn-promoting mechanism for improving CeO2 catalyst activity in soot oxidation. Experimental results show that Mn-doped CeO2 nanorods with surface Mn chemical valence states being optimized (Mn0.19Ce0.81O2) can lower the eliminating temperature of soot to 410 °C (T90) when in a loose contact and exhibit a strong resistance towards water molecules. The catalytic performances of Mn0.19Ce0.81O2 nanorods are comparable with those of other reported oxide catalysts both in the mimetic realistic and ideal reaction environments. Detailed characterization and theoretical calculation results demonstrate that balanced multiple Mn valences can dramatically enhance the catalysts' redox properties and their ability to activate O2 molecules, as well as improve the dynamic contact efficiency during the oxidation, which synergistically result in superior catalytic performances. This work might provide insight for the future design and preparation of catalysts to efficiently eliminate soot particles.
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Affiliation(s)
- Mingyun Zhu
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, China.
| | - Yifeng Wen
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, China.
| | - Lei Shi
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Zhiyuan Tan
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, China.
| | - Yuting Shen
- School of Electronic and Information Engineering, Changshu Institute of Technology, Changshu, 215500, China
| | - Kuibo Yin
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, China.
| | - Litao Sun
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, China.
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10
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Enhancing the Low-Temperature CO Oxidation over CuO-Based α-MnO 2 Nanowire Catalysts. NANOMATERIALS 2022; 12:nano12122083. [PMID: 35745420 PMCID: PMC9229205 DOI: 10.3390/nano12122083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/13/2022] [Accepted: 06/14/2022] [Indexed: 02/01/2023]
Abstract
A series of CuO-based catalysts supported on the α-MnO2 nanowire were facilely synthesized and employed as the CO oxidation catalysts. The achieved catalysts were systematically characterized by XRD, SEM, EDS-mapping, XPS and H2-TPR. The catalytic performances toward CO oxidation had been carefully evaluated over these CuO-based catalysts. The effects of different loading methods, calcination temperatures and CuO loading on the low temperature catalytic activity of the catalyst were investigated and compared with the traditional commercial MnO2 catalyst with a block structure. It was found that the slenderness ratio of a CuO/α-MnO2 nanowire catalyst decreases with the increase in CuO loading capacity. The results showed that when CuO loading was 3 wt%, calcination temperature was 200 °C and the catalyst that was supported by the deposition precipitation method had the highest catalytic activity. Besides, the α-MnO2 nanowire-supported catalysts with excellent redox properties displayed much better catalytic performances than the commercial MnO2-supported catalyst. In conclusion, the CuO-based catalysts that are supported by α-MnO2 nanowires are considered as a series of promising CO oxidation catalysts.
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11
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Shao J, Lan X, Zhang C, Cao C, Yu Y. Recent advances in soot combustion catalysts with designed micro-structures. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.08.057] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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12
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Surface Functionalization of Mesoporous Co3O4 and MnOx with Sodium for the Soot Oxidation Reaction. Top Catal 2022. [DOI: 10.1007/s11244-022-01595-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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13
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Selvakumar K, Duraisamy V, Venkateshwaran S, Arumugam N, Almansour AI, Wang Y, Xiaoteng Liu T, Murugesan Senthil Kumar S. Development of α‐MnO
2
Nanowire with Ni‐ and (Ni, Co)‐Cation Doping as an Efficient Bifunctional Oxygen Evolution and Oxygen Reduction Reaction Catalyst. ChemElectroChem 2022. [DOI: 10.1002/celc.202101303] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Karuppiah Selvakumar
- Electroorganic and Materials Electrochemistry (EME) Division CSIR-Central Electrochemical Research Institute (CECRI) Karaikudi-630 003 Tamil Nadu India
| | - Velu Duraisamy
- Electroorganic and Materials Electrochemistry (EME) Division CSIR-Central Electrochemical Research Institute (CECRI) Karaikudi-630 003 Tamil Nadu India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
| | - Selvaraj Venkateshwaran
- Electroorganic and Materials Electrochemistry (EME) Division CSIR-Central Electrochemical Research Institute (CECRI) Karaikudi-630 003 Tamil Nadu India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
| | - Natarajan Arumugam
- Department of Chemistry, College of Science King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia
| | - Abdulrahman I. Almansour
- Department of Chemistry, College of Science King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia
| | - Yucheng Wang
- Faculty of Engineering and Environment Northumbria University Newcastle Upon Tyne NE1 8ST United Kingdom
| | - Terence Xiaoteng Liu
- Faculty of Engineering and Environment Northumbria University Newcastle Upon Tyne NE1 8ST United Kingdom
| | - Sakkarapalayam Murugesan Senthil Kumar
- Electroorganic and Materials Electrochemistry (EME) Division CSIR-Central Electrochemical Research Institute (CECRI) Karaikudi-630 003 Tamil Nadu India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
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14
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Wang X, Sun Y, Li M, Zhang W, Zhu Y. Excellent catalytic oxidation performance on toluene and benzene over OMS-2 with a hierarchical porous structure synthesized by a one-pot facile method: modifying surface properties by introducing different amounts of K. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00032f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The formation of K–O–Mn bond weaken the bond of Mn–O–Mn which increases oxygen species mobility leading to excellent catalytic oxidation performance over OMS-2 by introducing different amounts of K.
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Affiliation(s)
- Xiaotong Wang
- Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, 150080 P. R. China
| | - Yanling Sun
- Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, 150080 P. R. China
| | - Mingyang Li
- Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, 150080 P. R. China
| | - Wanlu Zhang
- Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, 150080 P. R. China
| | - Yujun Zhu
- Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin, 150080 P. R. China
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15
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Wang L, Ren Y, Yu X, Yu D, Peng C, Zhou Q, Hou J, Zhong C, Yin C, Fan X, Zhao Z, Cheng K, Chen Y, Sojka Z, Kotarba A, Wei Y, Liu J. Facile preparation, catalytic performance and reaction mechanism of MnxCo1-xOδ/3DOM-m Ti0.7Si0.2W0.1Oy catalysts for the simultaneous removal of soot and NOx. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00077f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, three-dimensionally ordered macroporous-mesoporous Ti0.7Si0.2W0.1Oy (3DOM-m TiSiWO) supported MnxCo1-xOδ catalysts with different x values were prepared using the colloidal crystal template method and incipient wetness impregnation method. The...
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16
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Song H, Xu L, Chen M, Cui Y, Wu CE, Qiu J, Xu L, Cheng G, Hu X. Recent progresses in the synthesis of MnO 2 nanowire and its application in environmental catalysis. RSC Adv 2021; 11:35494-35513. [PMID: 35493136 PMCID: PMC9043261 DOI: 10.1039/d1ra06497e] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 10/27/2021] [Indexed: 12/27/2022] Open
Abstract
Nanostructured MnO2 with various morphologies exhibits excellent performance in environmental catalysis owing to its large specific surface area, low density, and adjustable chemical properties. The one-dimensional MnO2 nanowire has been proved to be the dominant morphology among various nanostructures, such as nanorods, nanofibers, nanoflowers, etc. The syntheses and applications of MnO2-based nanowires also have become a research hotspot in environmental catalytic materials over the last two decades. With the continuous deepening of the research, the control of morphology and crystal facet exposure in the synthesis of MnO2 nanowire materials have gradually matured, and the catalytic performance also has been greatly improved. Differences in the crystalline phase structure, preferably exposed crystal facets, and even the length of the MnO2 nanowires will evidently affect the final catalytic performances. Besides, the modifications by doping or loading will also significantly affect their catalytic performances. This review carefully summarizes the synthesis strategies of MnO2 nanowires developed in recent years as well as the influences of the phase structure, crystal facet, morphology, dopant, and loading amount on the catalytic performance. Besides, the cutting-edge applications of MnO2 nanowires in the field of environmental catalysis, such as CO oxidation, the removal of VOCs, denitrification, etc., have been also summarized. The application of MnO2 nanowire in environmental catalysis is still in the early exploratory stage. The gigantic gap between theoretical investigation and industrial application is still a great challenge. Compared with noble metal based traditional environmental catalytic materials, the lower cost of MnO2 has injected new momentum and promising potential into this research field.
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Affiliation(s)
- Huikang Song
- Collaborative Innovation Centre of the Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing 210044 P. R. China
| | - Leilei Xu
- Collaborative Innovation Centre of the Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing 210044 P. R. China
| | - Mindong Chen
- Collaborative Innovation Centre of the Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing 210044 P. R. China
| | - Yan Cui
- Collaborative Innovation Centre of the Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing 210044 P. R. China
| | - Cai-E Wu
- College of Light Industry and Food Engineering, Nanjing Forestry University Nanjing 210037 P. R. China
| | - Jian Qiu
- Jiangsu ShuangLiang Environmental Technology Co., Ltd Jiangyin 214400 P. R. China
| | - Liang Xu
- Jiangsu ShuangLiang Environmental Technology Co., Ltd Jiangyin 214400 P. R. China
| | - Ge Cheng
- Collaborative Innovation Centre of the Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing 210044 P. R. China
| | - Xun Hu
- School of Material Science and Engineering, University of Jinan Jinan 250022 P. R. China
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17
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Optimal exposed crystal facets of α-Mn2O3 catalysts with enhancing catalytic performance for soot combustion. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.05.039] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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18
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Xu K, Wang M, Zhang Y, Shan W, He H. Promotion Effects of Barium and Cobalt on Manganese Oxide Catalysts for Soot Oxidation. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01524] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ke Xu
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Meng Wang
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yan Zhang
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- Ningbo Urban Environment Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Ningbo 315800, China
| | - Wenpo Shan
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- Ningbo Urban Environment Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Ningbo 315800, China
| | - Hong He
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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19
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Ma C, Sun S, Lu H, Hao Z, Yang C, Wang B, Chen C, Song M. Remarkable MnO 2 structure-dependent H 2O promoting effect in HCHO oxidation at room temperature. JOURNAL OF HAZARDOUS MATERIALS 2021; 414:125542. [PMID: 33667806 DOI: 10.1016/j.jhazmat.2021.125542] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/10/2021] [Accepted: 02/24/2021] [Indexed: 06/12/2023]
Abstract
H2O is often critical in determining the activity and stability of metal oxide catalysts for HCHO oxidation; however, synthesis of metal oxide catalysts with super resistance to H2O remains a challenging. Herein, we synthesized Akhtenskite-type MnO2 catalyst with Mn-O-Mn stretching along MnO6 octahedra layers, which promotes the utilization of the associatively adsorbed H2O. The activity and stability of formaldehyde oxidation at room temperature enhanced in humid air. Diffuse-reflectance infrared Fourier transform (DRIRFT) spectroscopy was used to characterize the H2O adsorption and intermediate species. The associatively adsorbed H2O promotes the oxidation of formaldehyde to CO2 via the formic acid intermediate. The service life of MnO2 is prolonged due to formic acid generation. MnO2 gradually deactivates when formic acid accumulates and forms formate and hydrogen carbonate species. This study provides significant insights into the development of a high-efficiency MnO2 catalyst for formaldehyde oxidation in humid air, and the developed MnO2 catalyst is a promising candidate for application in practical formaldehyde elimination.
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Affiliation(s)
- Chunyan Ma
- Key Laboratory of Environmental Nanotechnology and Health Effects, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shumei Sun
- Department of Physics and Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875, China
| | - Hao Lu
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Zhengping Hao
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chenggong Yang
- Key Laboratory of Environmental Nanotechnology and Health Effects, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Bin Wang
- Beijing Research Institute of Chemical Industry, Sinopec Group, Beijing 100013, China
| | - Cheng Chen
- Key Laboratory of Environmental Nanotechnology and Health Effects, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Maoyong Song
- Key Laboratory of Environmental Nanotechnology and Health Effects, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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20
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Mo S, Peng P, Pei Y, Shen T, Xie Q, Fu M, Chen Y, Ye D. Immobilizing ultrafine bimetallic PtAg alloy onto uniform MnO2 microsphere as a highly active catalyst for CO oxidation. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.11.062] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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Sun X, Sun J, Sun Y, Li C, Fang J, Zhang T, Wan Y, Xu L, Zhou Y, Wang L, Dong B. Oxygen Self‐Sufficient Nanoplatform for Enhanced and Selective Antibacterial Photodynamic Therapy against Anaerobe‐Induced Periodontal Disease. ADVANCED FUNCTIONAL MATERIALS 2021; 31:2101040. [DOI: 10.1002/adfm.202101040] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Indexed: 07/31/2023]
Affiliation(s)
- Xiaolin Sun
- Department of Oral Implantology School of Dentistry Jilin University Changchun 130021 China
| | - Jiao Sun
- Department of Cell Biology Norman Bethune College of Medicine Jilin University Changchun 130021 China
| | - Yue Sun
- Department of Oral Implantology School of Dentistry Jilin University Changchun 130021 China
| | - Chunyan Li
- Jilin Provincial Key Laboratory of Sciences and Technology for Stomatology Nanoengineering Changchun 130021 China
| | - Jiao Fang
- Department of Oral Implantology School of Dentistry Jilin University Changchun 130021 China
| | - Tianshou Zhang
- Jilin Provincial Key Laboratory of Sciences and Technology for Stomatology Nanoengineering Changchun 130021 China
| | - Yao Wan
- Department of Oral Implantology School of Dentistry Jilin University Changchun 130021 China
| | - Lin Xu
- State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University Changchun 130012 China
| | - Yanmin Zhou
- Department of Oral Implantology School of Dentistry Jilin University Changchun 130021 China
| | - Lin Wang
- Department of Oral Implantology School of Dentistry Jilin University Changchun 130021 China
| | - Biao Dong
- State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University Changchun 130012 China
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22
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Yu X, Ren Y, Yu D, Chen M, Wang L, Wang R, Fan X, Zhao Z, Cheng K, Chen Y, Gryboś J, Kotarba A, Sojka Z, Wei Y, Liu J. Hierarchical Porous K-OMS-2/3DOM-m Ti 0.7Si 0.3O 2 Catalysts for Soot Combustion: Easy Preparation, High Catalytic Activity, and Good Resistance to H 2O and SO 2. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00748] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Xuehua Yu
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, China
| | - Yu Ren
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18# Fuxue Road, Chang Ping, Beijing 102249, China
| | - Di Yu
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, China
| | - Maozhong Chen
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, China
| | - Lanyi Wang
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, China
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18# Fuxue Road, Chang Ping, Beijing 102249, China
| | - Ruidan Wang
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, China
| | - Xiaoqiang Fan
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, China
| | - Zhen Zhao
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, China
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18# Fuxue Road, Chang Ping, Beijing 102249, China
| | - Kai Cheng
- Energy and Catalysis Laboratory, Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
| | - Yongsheng Chen
- Energy and Catalysis Laboratory, Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
| | - Joanna Gryboś
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland
| | - Andrzej Kotarba
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland
| | - Zbigniew Sojka
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland
| | - Yuechang Wei
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18# Fuxue Road, Chang Ping, Beijing 102249, China
| | - Jian Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18# Fuxue Road, Chang Ping, Beijing 102249, China
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23
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Yang R, Fan Y, Ye R, Tang Y, Cao X, Yin Z, Zeng Z. MnO 2 -Based Materials for Environmental Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2004862. [PMID: 33448089 DOI: 10.1002/adma.202004862] [Citation(s) in RCA: 124] [Impact Index Per Article: 41.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/31/2020] [Indexed: 06/12/2023]
Abstract
Manganese dioxide (MnO2 ) is a promising photo-thermo-electric-responsive semiconductor material for environmental applications, owing to its various favorable properties. However, the unsatisfactory environmental purification efficiency of this material has limited its further applications. Fortunately, in the last few years, significant efforts have been undertaken for improving the environmental purification efficiency of this material and understanding its underlying mechanism. Here, the aim is to summarize the recent experimental and computational research progress in the modification of MnO2 single species by morphology control, structure construction, facet engineering, and element doping. Moreover, the design and fabrication of MnO2 -based composites via the construction of homojunctions and MnO2 /semiconductor/conductor binary/ternary heterojunctions is discussed. Their applications in environmental purification systems, either as an adsorbent material for removing heavy metals, dyes, and microwave (MW) pollution, or as a thermal catalyst, photocatalyst, and electrocatalyst for the degradation of pollutants (water and gas, organic and inorganic) are also highlighted. Finally, the research gaps are summarized and a perspective on the challenges and the direction of future research in nanostructured MnO2 -based materials in the field of environmental applications is presented. Therefore, basic guidance for rational design and fabrication of high-efficiency MnO2 -based materials for comprehensive environmental applications is provided.
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Affiliation(s)
- Ruijie Yang
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China
| | - Yingying Fan
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China
| | - Ruquan Ye
- Department of Chemistry, State Key Lab of Marine Pollution, City University of Hong Kong, Hong Kong, 999077, P. R. China
| | - Yuxin Tang
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Xiehong Cao
- College of Materials Science and Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang, 310014, P. R. China
| | - Zongyou Yin
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Zhiyuan Zeng
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China
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25
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Yang W, Wang Y, Yang W, Liu H, Li Z, Peng Y, Li J. Surface In Situ Doping Modification over Mn 2O 3 for Toluene and Propene Catalytic Oxidation: The Effect of Isolated Cu δ+ Insertion into the Mezzanine of Surface MnO 2 Cladding. ACS APPLIED MATERIALS & INTERFACES 2021; 13:2753-2764. [PMID: 33401915 DOI: 10.1021/acsami.0c19972] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Heterocation insertion and substitution in tunnels and mezzanines of MnO2 present significant influences on the microchemical environment at the surfaces and interfaces. An innovative surface in situ doping modification method via Cu2+-H+/KMnO4 treatment was applied onto the Mn2O3 surface to provide Mn2O3@MnO2 nanospheres. Cu was stabilized into resulting MnO2 cladding substituting original K+ during a mild comproportionation reaction between Mn(VII) and Mn(III). The Cu25 (Cu(II): Mn(VII)atomic = 25%) catalyst shows significant promotion of the catalytic performance compared with bare Mn2O3 and Cu0 (without Cu involving). Isolated Cuδ+ was predominantly inserted into the mezzanine of the [MnO6]δ- layers in MnO2 instead of K+, leading to slight electron transfer from Cuδ+ to outermost Mn(4-ε)+ and a decrease of interlayer spacing as well as crystallinity. Such a configuration facilitates the formation of additional oxygen vacancies, promoting the redox ability and oxygen mobility at relatively low temperatures. The mechanistic study reveals that Cuδ+ in MnO2 cladding boosts the activation of toluene (methyl) to form benzoates and propene (methyl and double bonds) to form carboxylates, enhancing the chemical adsorption of reactants. Moreover, it also inhibits the unfavored accumulation of incomplete oxidized intermediates on the surface at high temperatures.
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Affiliation(s)
- Wenhao Yang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Ya Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Weinan Yang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Hao Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Zhenguo Li
- National Engineering Laboratory for Mobile Source Emission Control Technology, China Automotive Technology & Research Center Co., Ltd, Tianjin 300300, China
| | - Yue Peng
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Junhua Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
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26
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Wang M, Zhang Y, Yu Y, Shan W, He H. Synergistic Effects of Multicomponents Produce Outstanding Soot Oxidation Activity in a Cs/Co/MnO x Catalyst. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:240-248. [PMID: 33337142 DOI: 10.1021/acs.est.0c06082] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The control of soot emission from diesel vehicles is of extraordinary importance to the environment, and catalytic removal of soot is a highly effective and clean method. Here, we report a novel, non-noble metal catalyst for application in the catalytic combustion of soot with superb activity and resistance to H2O and SO2. MnOx oxide was prepared via a hydrothermal method, and then, Cs and Co were loaded on MnOx by impregnation. The 5%Cs/1%Co/MnOx catalyst displayed excellent catalytic activity with values of T10 (332 °C), T50 (371 °C), and T90 (415 °C) under loose contact. The as-prepared catalysts were investigated by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), H2 temperature-programmed reduction (TPR), O2 temperature-programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS), and X-ray absorption fine structure (XAFS). The results suggest that, after the introduction of Cs and Co into the MnOx oxide, more NO2 molecules take part in soot oxidation, exhibiting higher NO2 utilization efficiency; this is due to the synergistic effects of multiple components (Cs, Co, and Mn) promoting the generation of more surface-active oxygen and then accelerating the reaction between NO2 and soot. This study provides significant insights into the development of high-efficiency catalysts for soot oxidation, and the developed 5%Cs/1%Co/MnOx catalyst is a promising candidate for application in diesel particulate filters.
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Affiliation(s)
- Meng Wang
- Center for Excellence in Regional Atmospheric Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yan Zhang
- Center for Excellence in Regional Atmospheric Environment, Chinese Academy of Sciences, Xiamen 361021, China
- Ningbo Urban Environment Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Ningbo 315800, China
| | - Yunbo Yu
- Center for Excellence in Regional Atmospheric Environment, Chinese Academy of Sciences, Xiamen 361021, China
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenpo Shan
- Center for Excellence in Regional Atmospheric Environment, Chinese Academy of Sciences, Xiamen 361021, China
- Ningbo Urban Environment Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Ningbo 315800, China
| | - Hong He
- Center for Excellence in Regional Atmospheric Environment, Chinese Academy of Sciences, Xiamen 361021, China
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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Zhong Y, Dai J, Xu X, Su C, Shao Z. Facilitating Oxygen Redox on Manganese Oxide Nanosheets by Tuning Active Species and Oxygen Defects for Zinc‐Air Batteries. ChemElectroChem 2020. [DOI: 10.1002/celc.202001419] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yijun Zhong
- Western Australian School of Mines: Minerals Energy and Chemical Engineering (WASM-MECE) Curtin University Perth Western Australia 6102 Australia
| | - Jie Dai
- State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Nanjing 211816 P. R. China
| | - Xiaomin Xu
- Western Australian School of Mines: Minerals Energy and Chemical Engineering (WASM-MECE) Curtin University Perth Western Australia 6102 Australia
| | - Chao Su
- Western Australian School of Mines: Minerals Energy and Chemical Engineering (WASM-MECE) Curtin University Perth Western Australia 6102 Australia
- School of Energy and Power Jiangsu University of Science and Technology Zhenjiang 212100 P. R. China
| | - Zongping Shao
- Western Australian School of Mines: Minerals Energy and Chemical Engineering (WASM-MECE) Curtin University Perth Western Australia 6102 Australia
- State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Nanjing 211816 P. R. China
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Rao BG, Sudarsanam P, Rao TV, Amin MH, Bhargava SK, Reddy BM. Highly Dispersed MnOx Nanoparticles on Shape-Controlled SiO2 Spheres for Ecofriendly Selective Allylic Oxidation of Cyclohexene. Catal Letters 2020. [DOI: 10.1007/s10562-020-03205-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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May YA, Wei S, Yu WZ, Wang WW, Jia CJ. Highly Efficient CuO/α-MnO 2 Catalyst for Low-Temperature CO Oxidation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:11196-11206. [PMID: 32787057 DOI: 10.1021/acs.langmuir.0c00692] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Copper manganese composite (hopcalite) catalyst has been widely explored for low-temperature CO oxidation reactions. However, the previous reports on the stabilization of such composite catalysts have shown that they deactivated severely under moist conditions. Herein, we developed an α-MnO2 nanorod-supported copper oxide catalyst that is very active and stable for the conditions with or without moisture by the deposition precipitation (DP) method. Incredibly, the CuO/MnO2 DP catalyst (with 5 wt % copper loading) achieves superior activity with a reaction rate of 9.472 μmol-1·gcat-1·s-1 even at ambient temperatures, which is at least double times of that for the reported copper-based catalyst. Additionally, the CuO/MnO2 DP catalyst is significantly more stable than the copper manganese composite catalysts reported in the literature under the presence of 3% water vapor as well as without moisture. A correlation between the catalytic CO oxidation activity and textural characteristics was derived via multitechnique analyses. The results imply that the superior activity of the CuO/MnO2 DP catalyst is associated with the proper adsorption of CO on partially reduced copper oxide as Cu(I)-CO and more surface oxygen species at the interfacial site of the catalyst.
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Affiliation(s)
- Yu Aung May
- Key Laboratory for Colloid and Interface Chemistry, Key Laboratory of Special Aggregated Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Shuai Wei
- Key Laboratory for Colloid and Interface Chemistry, Key Laboratory of Special Aggregated Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Wen-Zhu Yu
- Key Laboratory for Colloid and Interface Chemistry, Key Laboratory of Special Aggregated Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Wei-Wei Wang
- Key Laboratory for Colloid and Interface Chemistry, Key Laboratory of Special Aggregated Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Chun-Jiang Jia
- Key Laboratory for Colloid and Interface Chemistry, Key Laboratory of Special Aggregated Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
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30
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Wang J, Yang S, Sun H, Qiu J, Men Y. Highly improved soot combustion performance over synergetic Mn xCe 1-xO 2 solid solutions within mesoporous nanosheets. J Colloid Interface Sci 2020; 577:355-367. [PMID: 32485417 DOI: 10.1016/j.jcis.2020.05.090] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 05/10/2020] [Accepted: 05/23/2020] [Indexed: 10/24/2022]
Abstract
Constructing synergetic bimetal oxide solid solutions with exceptional catalytic performances for efficient soot elimination is becoming a research frontier in environmental catalysis. Herein, synergetic MnxCe1-xO2 solid solutions within mesoporous nanosheets, synthesized by a facile hydrothermal method for the first time, have been performed to catalyze the NOx-assisted soot combustion. Research results validate that MnxCe1-xO2 solid solutions displayed highly improved soot combustion performance with respect to activity and selectivity, mainly due to the synergetic effect by combining factors of the unique mesoporous nanosheet-shaped feature, the enhanced chemical nature stemmed from high-valence Mn species, abundant active oxygen species originated from the enriched oxygen vacancies and the escalated redox properties. Furthermore, the enhanced NOx storage and oxidation abilities, mainly derived from integrating reciprocal merits of high-valence Mn species and CeO2, were also responsible for the highly improved soot combustion performance via NOx-assisted mechanism. Moreover, MnxCe1-xO2 solid solutions also exhibited excellent reusability due to the unique morphological structure and stable crystal phase, showing good potential in practical applications.
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Affiliation(s)
- Jinguo Wang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, PR China.
| | - Shuaifeng Yang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, PR China
| | - Honghua Sun
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, PR China
| | - Jianqiang Qiu
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, PR China
| | - Yong Men
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, PR China
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31
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Wang Y, Zhang L, Zhang C, Xu X, Xie Y, Chen W, Wang J, Zhang R. Promoting the Generation of Active Oxygen over Ag-Modified Nanoflower-like α-MnO2 for Soot Oxidation: Experimental and DFT Studies. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c01308] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yuhang Wang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Longzhu Zhang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Changsen Zhang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Xingmin Xu
- School of Forensic Medicine, Henan University of Technology, Luoyang 471000, Henan, China
| | - Yunyun Xie
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Wenjun Chen
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Jie Wang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Ruiqin Zhang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, Henan, China
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32
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Chatterjee A, Or SW. Metal–organic framework-derived MnO/CoMn2O4@N–C nanorods with nanoparticle interstitial decoration in core@shell structure as improved bifunctional electrocatalytic cathodes for Li–O2 batteries. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.135809] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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33
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Medina JC, Rodil SE, Zanella R. Synthesis of a CeO2/Co3O4 catalyst with a remarkable performance for the soot oxidation reaction. Catal Sci Technol 2020. [DOI: 10.1039/c9cy01821b] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A highly active catalyst based on CeO2/Co3O4 for soot oxidation at low temperatures with complete selectivity toward CO2.
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Affiliation(s)
- J. C. Medina
- Instituto de Ciencias Aplicadas y Tecnología
- Universidad Nacional Autónoma de México
- C.P. 04510 Mexico City
- Mexico
| | - S. E. Rodil
- Instituto de Investigaciones en Materiales
- Universidad Nacional Autónoma de México
- Mexico City
- Mexico
| | - Rodolfo Zanella
- Instituto de Ciencias Aplicadas y Tecnología
- Universidad Nacional Autónoma de México
- C.P. 04510 Mexico City
- Mexico
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34
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Highly dispersed cobalt oxide nanoparticles on manganese oxide nanotubes for aerobic oxidation of benzyl alcohol. CATAL COMMUN 2019. [DOI: 10.1016/j.catcom.2019.105763] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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35
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Zhao H, Dong F, Han W, Tang Z. Study of Morphology-Dependent and Crystal-Plane Effects of CeMnOx Catalysts for 1,2-Dichlorobenzene Catalytic Elimination. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b02138] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Haijun Zhao
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, and National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Fang Dong
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, and National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Weiliang Han
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, and National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Zhicheng Tang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, and National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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36
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Yan L, Shen C, Niu L, Liu MC, Lin J, Chen T, Gong Y, Li C, Liu X, Xu S. Experimental and Theoretical Investigation of the Effect of Oxygen Vacancies on the Electronic Structure and Pseudocapacitance of MnO 2. CHEMSUSCHEM 2019; 12:3571-3581. [PMID: 31127866 DOI: 10.1002/cssc.201901015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Revised: 05/14/2019] [Indexed: 06/09/2023]
Abstract
Defect engineering is an effective way to modulate the intrinsic physicochemical properties of materials. In this work, δ-MnO2 with oxygen vacancies is fabricated by a simple oxidation or reduction process, and the relationship between the electronic structure and pseudocapacitance is systematically studied through experimental analysis and theoretical calculations. The peaks in the Raman spectra of the as-prepared samples are shifted compared with those of pure MnO2 and the Mn3+ /Mn4+ ratio and O species content also change after the introduction of oxygen vacancies. The optimized samples exhibit a better specific capacitance of 207 F g-1 after the oxidation process and 181.4 F g-1 after the reduction treatment compared with only 143.9 F g-1 for the pure MnO2 . The samples obtained through the oxidation or reduction process also retain 93.3 or 86.4 % of the initial capacity after 5000 cycles. The excellent properties are attributed to the enhanced conductivity and increased surface reactivity or electrochemically active sites. Theoretical calculations demonstrate that the presence of oxygen vacancies leads to an increase in the density of states, which improves the redox reaction of MnO2 . This study will provide a reference for exploring and designing highperformance pseudocapacitive materials.
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Affiliation(s)
- Lijin Yan
- Institute of Coordination Bond Metrology and Engineering (CBME), China Jiliang University, Hangzhou, 310018, P. R. China
- College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, P. R. China
| | - Cheng Shen
- Institute of Coordination Bond Metrology and Engineering (CBME), China Jiliang University, Hangzhou, 310018, P. R. China
- College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, P. R. China
| | - Lengyuan Niu
- Institute of Coordination Bond Metrology and Engineering (CBME), China Jiliang University, Hangzhou, 310018, P. R. China
- College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, P. R. China
| | - Mao-Cheng Liu
- State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals and School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, P. R. China
| | - Jianhua Lin
- Institute of Coordination Bond Metrology and Engineering (CBME), China Jiliang University, Hangzhou, 310018, P. R. China
- College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, P. R. China
| | - Taiqiang Chen
- Institute of Coordination Bond Metrology and Engineering (CBME), China Jiliang University, Hangzhou, 310018, P. R. China
- College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, P. R. China
| | - Yinyan Gong
- Institute of Coordination Bond Metrology and Engineering (CBME), China Jiliang University, Hangzhou, 310018, P. R. China
- College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, P. R. China
| | - Can Li
- Institute of Coordination Bond Metrology and Engineering (CBME), China Jiliang University, Hangzhou, 310018, P. R. China
- College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, P. R. China
| | - Xinjuan Liu
- Institute of Coordination Bond Metrology and Engineering (CBME), China Jiliang University, Hangzhou, 310018, P. R. China
- College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, P. R. China
| | - Shiqing Xu
- Institute of Coordination Bond Metrology and Engineering (CBME), China Jiliang University, Hangzhou, 310018, P. R. China
- College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, P. R. China
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37
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Liu G, Yu J, Chen L, Feng N, Meng J, Fang F, Zhao P, Wang L, Wan H, Guan G. Promoting Diesel Soot Combustion Efficiency over Hierarchical Brushlike α-MnO2 and Co3O4 Nanoarrays by Improving Reaction Sites. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b02155] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Geng Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, P.R. China
| | - Jiahuan Yu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, P.R. China
| | - Li Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, P.R. China
| | - Nengjie Feng
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, P.R. China
| | - Jie Meng
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, P.R. China
| | - Fan Fang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, P.R. China
| | - Peng Zhao
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, P.R. China
| | - Lei Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, P.R. China
| | - Hui Wan
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, P.R. China
| | - Guofeng Guan
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, P.R. China
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38
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Chalkidis A, Jampaiah D, Amin MH, Hartley PG, Sabri YM, Bhargava SK. CeO 2-Decorated ?-MnO 2 Nanotubes: A Highly Efficient and Regenerable Sorbent for Elemental Mercury Removal from Natural Gas. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:8246-8256. [PMID: 31132272 DOI: 10.1021/acs.langmuir.9b00835] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
CeO2 nanoparticle-decorated ?-MnO2 nanotubes (NTs) were prepared and tested for elemental mercury (Hg0) vapor removal in simulated natural gas mixtures at ambient conditions. The composition which had the largest surface area and a relative Ce/Mn atomic weight ratio of around 35% exhibited a maximum Hg0 uptake capacity exceeding 20 mg?g?1 (2 wt %), as determined from measurements of mercury breakthrough which corresponded to 99.5% Hg0 removal efficiency over 96 h of exposure. This represents a significant improvement in the activity of pure metal oxides. Most importantly, the composite nanosorbent was repeatedly regenerated at 350 ?C and retained the 0.5% Hg0 breakthrough threshold. It was projected to be able to sustain 20 regeneration cycles, with the presence of acid gases, CO2, and H2S, not affecting its performance. This result is particularly important, considering that pure CeO2 manifests rather poor activity for Hg0 removal at ambient conditions, and hence, a synergistic effect in the composite nanomaterial was observed. This possibly results from the addition of facile oxygen vacancy formation at ?-MnO2 NTs and the increased amount of surface-adsorbed oxygen species.
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Affiliation(s)
- Anastasios Chalkidis
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science , RMIT University , GPO Box 2476, Melbourne , Victoria 3001 , Australia
- CSIRO Energy , Private Bag 10, Clayton South , Victoria 3169 , Australia
| | - Deshetti Jampaiah
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science , RMIT University , GPO Box 2476, Melbourne , Victoria 3001 , Australia
| | - Mohamad Hassan Amin
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science , RMIT University , GPO Box 2476, Melbourne , Victoria 3001 , Australia
| | - Patrick G Hartley
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science , RMIT University , GPO Box 2476, Melbourne , Victoria 3001 , Australia
- CSIRO Energy , Private Bag 10, Clayton South , Victoria 3169 , Australia
| | - Ylias M Sabri
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science , RMIT University , GPO Box 2476, Melbourne , Victoria 3001 , Australia
| | - Suresh K Bhargava
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Science , RMIT University , GPO Box 2476, Melbourne , Victoria 3001 , Australia
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Wu Q, Xiong J, Mei X, Zhang Y, Wei Y, Zhao Z, Liu J, Li J. Efficient Catalysts of La2O3 Nanorod-Supported Pt Nanoparticles for Soot Oxidation: The Role of La2O3-{110} Facets. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01018] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Qiangqiang Wu
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, China
| | - Jing Xiong
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, China
| | - Xuelei Mei
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, China
| | - Yilin Zhang
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, China
| | - Yuechang Wei
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, China
| | - Zhen Zhao
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, China
| | - Jian Liu
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, China
| | - Jianmei Li
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, China
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40
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Wu Q, Xiong J, Zhang Y, Mei X, Wei Y, Zhao Z, Liu J, Li J. Interaction-Induced Self-Assembly of Au@La2O3 Core–Shell Nanoparticles on La2O2CO3 Nanorods with Enhanced Catalytic Activity and Stability for Soot Oxidation. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00107] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Qiangqiang Wu
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, People’s Republic of China
| | - Jing Xiong
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, People’s Republic of China
| | - Yilin Zhang
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, People’s Republic of China
| | - Xuelei Mei
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, People’s Republic of China
| | - Yuechang Wei
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, People’s Republic of China
| | - Zhen Zhao
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, People’s Republic of China
| | - Jian Liu
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, People’s Republic of China
| | - Jianmei Li
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, People’s Republic of China
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41
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Xu S, Li SP, Wang T, Wang CF. Effect of Surface Ionization of Doped MnO 2 on Capacitive Deionization Efficiency. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:628-640. [PMID: 30607960 DOI: 10.1021/acs.langmuir.8b03308] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Associating MnO2 with carbonaceous supports profoundly enhances capacitive deionization (CDI) efficiency. A fundamental question of how the surface chemistry of MnO2 itself influences CDI efficiency is not yet fully understood. In this study, the effect of surface ionization on the CDI efficiencies of Fe-, Co-, and Ni-doped α-MnO2 (<0.1 mol %) as a model cathode material was studied. A pattern that CDI efficiency decreased with increasing negative surface charge density resulting from surface deprotonation was noted. This is likely attributed to the appreciable co-ion expulsion occurring at a highly ionized surface in the mesopores of MnO2. It is thus concluded that the combination of surface charge modification and a microporous environment would be important for CDI efficiency enhancement by minimizing co-ion exclusion effect. In the former case, structural stress adjustment by doping elements would be a practical route to regulate the p Ka1 and p Ka2 values and consequently the degree of surface ionization of MnO2.
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Affiliation(s)
- Su Xu
- School of Environmental Sciences and Engineering , Xiamen University of Technology , Xiamen 361024 , P. R. China
- Department of Biomedical Engineering and Environmental Sciences , National Tsing Hua University , Hsinchu 300 , Taiwan
| | - Shu-Pin Li
- Department of Biomedical Engineering and Environmental Sciences , National Tsing Hua University , Hsinchu 300 , Taiwan
| | - TsingHai Wang
- Department of Chemical Engineering and Materials Science , Yuan Ze University , Zhongli 320 , Taiwan
| | - Chu-Fang Wang
- Department of Biomedical Engineering and Environmental Sciences , National Tsing Hua University , Hsinchu 300 , Taiwan
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42
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Zhao F, Li S, Wu X, Yue R, Li W, Chen Y. Synergetic effect over flame-made manganese doped CuO-CeO 2 nanocatalyst for enhanced CO oxidation performance. RSC Adv 2019; 9:2343-2352. [PMID: 35520527 PMCID: PMC9059897 DOI: 10.1039/c8ra09626k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 01/03/2019] [Indexed: 11/21/2022] Open
Abstract
CuO-CeO2 nanocatalysts with different amounts of Mn dopping (Mn/Cu molar ratios of 0.5 : 5, 1 : 5 and 1.5 : 5) were synthesized by flame spray pyrolysis (FSP) method and tested in the catalytic oxidation of CO. The physicochemical properties of the synthesised samples were characterized systematically, including using X-ray diffraction (XRD), Raman spectroscopy, field-emission scanning electron microscopy (FESEM), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), oxygen-temperature programmed desorption (O2-TPD), hydrogen-temperature programmed reduction (H2-TPR) and in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS). The results showed that the 1Mn-Cu-Ce sample (Mn/Cu molar ratio of 1 : 5) exhibited superior catalytic activity for CO oxidation, with the temperature of 90% CO oxidation at 131 °C at a high space velocity (SV = 60 000 mL g-1 h-1), which was 56 °C lower than that of the Cu-Ce sample. In addition, the 1Mn-Cu-Ce sample displays excellent stability with prolonged time on CO stream and the resistance to water vapor. The significantly enhanced activity was correlated with strong synergetic effect, leading to fine textual properties, abundant chemically adsorbed oxygen and high lattice oxygen mobility, which further induced more Cu+ species and less formation of carbon intermediates during the CO oxidation process detected by in situ DRIFTS analysis. This work will provide in-depth understanding of the synergetic effect on CO oxidation performances over Mn doped CuO-CeO2 composite catalysts through FSP method.
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Affiliation(s)
- Feng Zhao
- State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Shuangde Li
- State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Xiaofeng Wu
- State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Renliang Yue
- State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Weiman Li
- State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Yunfa Chen
- State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 P. R. China
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences Xiamen 361021 P. R. China
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43
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Zhao P, Fang F, Feng N, Chen C, Liu G, Chen L, Zhu Z, Meng J, Wan H, Guan G. Self-templating construction of mesopores on three-dimensionally ordered macroporous La0.5Sr0.5MnO3 perovskite with enhanced performance for soot combustion. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00096h] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A three-dimensionally ordered macroporous (3DOM) La0.5Sr0.5MnO3 perovskite was prepared by a colloidal crystal templating method, with extra mesopores created by selective dissolution method performed successively.
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44
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Yang S, Wang J, Chai W, Zhu J, Men Y. Enhanced soot oxidation activity over CuO/CeO2 mesoporous nanosheets. Catal Sci Technol 2019. [DOI: 10.1039/c8cy02605j] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
CuO/CeO2 mesoporous nanosheets exhibited superior soot oxidation activity owing to the synergistic effects.
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Affiliation(s)
- Shuaifeng Yang
- College of Chemistry and Chemical Engineering
- Shanghai University of Engineering Science
- Shanghai 201620
- P. R. China
| | - Jinguo Wang
- College of Chemistry and Chemical Engineering
- Shanghai University of Engineering Science
- Shanghai 201620
- P. R. China
| | - Wei Chai
- Department of Chemical Engineering
- Zaozhuang Vocational College
- ZaoZhuang 277800
- P. R. China
| | - Jian Zhu
- The Education Ministry Key Lab of Resource Chemistry
- Shanghai Normal University
- Shanghai 200234
- P. R. China
| | - Yong Men
- College of Chemistry and Chemical Engineering
- Shanghai University of Engineering Science
- Shanghai 201620
- P. R. China
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45
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Neelapala SD, Patnaik H, Dasari H. Enhancement of soot oxidation activity of manganese oxide (Mn2
O3
) through doping by the formation of Mn1.9
M0.1
O3-δ
(M = Co, Cu, and Ni). ASIA-PAC J CHEM ENG 2018. [DOI: 10.1002/apj.2234] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Satya Deepika Neelapala
- Department of Chemical Engineering, Manipal Institute of Technology; Manipal Academy of Higher Education; Manipal Karnataka India
| | - Harsh Patnaik
- Department of Chemical Engineering, Manipal Institute of Technology; Manipal Academy of Higher Education; Manipal Karnataka India
| | - Harshini Dasari
- Department of Chemical Engineering, Manipal Institute of Technology; Manipal Academy of Higher Education; Manipal Karnataka India
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46
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Bai X, Tong X, Gao Y, Zhu W, Fu C, Ma J, Tan T, Wang C, Luo Y, Sun H. Hierarchical multidimensional MnO2 via hydrothermal synthesis for high performance supercapacitors. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.06.003] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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47
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Liu W, Yang L, Xu S, Chen Y, Liu B, Li Z, Jiang C. Efficient removal of hexavalent chromium from water by an adsorption–reduction mechanism with sandwiched nanocomposites. RSC Adv 2018; 8:15087-15093. [PMID: 35541367 PMCID: PMC9080019 DOI: 10.1039/c8ra01805g] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 04/13/2018] [Indexed: 12/04/2022] Open
Abstract
Hexavalent chromium Cr(vi), one of the most toxic contaminants, is released in the environment due to various anthropogenic activities. This study presents a novel sandwiched nanocomposite synthesized using graphene oxide (GO), manganese dioxide (MnO2) nanowires, iron oxide (Fe3O4) nanoparticles and polypyrrole (PPy) to remove hexavalent chromium ion Cr(vi) from water by an adsorption–reduction mechanism. In the sandwiched nanocomposites, GO provided enough surface area, functional groups, and hydrophilic surface for efficient absorption. Fe3O4 nanoparticles with excellent magnetic properties make it easy to separate and recover from water. Under acidic conditions, MnO2 nanowires act as both template and oxidant to initiate the polymerization of pyrrole monomers on its freshly activated surface to obtain GO/MnO2/Fe3O4/PPy (designated as GMFP) nanocomposite. GMFP could effectively adsorb Cr(vi) through electrostatic attraction, and the adsorbed Cr(vi) ions were partly reduced to trivalent chromium Cr(iii) (62%), resulting in the efficient adsorption and high removal of Cr(vi) from water. Hexavalent chromium adsorption by GMFP is strongly pH dependent and the adsorption kinetics followed the pseudo-second-order model. The Langmuir isothermal model described the adsorption isotherm data well and the maximum adsorption capacity was up to 374.53 mg g−1 at pH 2.0. These experimental results suggested that GMFP had great potential as an economic and efficient adsorbent of hexavalent chromium from wastewater, which has huge application potential. A sandwiched nanocomposite has been developed to remove hexavalent chromium ion Cr(vi) from water by an adsorption–reduction mechanism.![]()
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Affiliation(s)
- Weikang Liu
- School of Chemical Engineering
- Anhui University of Science and Technology
- Huainan
- China
| | - Liang Yang
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei
- China
- State Key Laboratory of Transducer Technology
| | - Shihao Xu
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei
- China
- State Key Laboratory of Transducer Technology
| | - Yao Chen
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei
- China
- State Key Laboratory of Transducer Technology
| | - Bianhua Liu
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei
- China
- State Key Laboratory of Transducer Technology
| | - Zhong Li
- School of Chemical Engineering
- Anhui University of Science and Technology
- Huainan
- China
| | - Changlong Jiang
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei
- China
- State Key Laboratory of Transducer Technology
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48
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Huang P, Zhao M, Jin B, Li H, Zhu Z, Jiang L, Jiang Q. Rational design of MnCo2O4@NC@MnO2 three-layered core–shell octahedron for high-rate and long-life lithium storage. Dalton Trans 2018; 47:14540-14548. [DOI: 10.1039/c8dt03148g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
With the depletion of fossil energy and rapid development of electronic equipment, the commercial lithium-ion batteries (LIBs) do not meet the current energy demand.
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Affiliation(s)
- Peng Huang
- Key Laboratory of Automobile Materials
- Ministry of Education
- and College of Materials Science and Engineering
- Jilin University
- Changchun 130022
| | - Ming Zhao
- Key Laboratory of Automobile Materials
- Ministry of Education
- and College of Materials Science and Engineering
- Jilin University
- Changchun 130022
| | - Bo Jin
- Key Laboratory of Automobile Materials
- Ministry of Education
- and College of Materials Science and Engineering
- Jilin University
- Changchun 130022
| | - Huan Li
- Key Laboratory of Automobile Materials
- Ministry of Education
- and College of Materials Science and Engineering
- Jilin University
- Changchun 130022
| | - Zhi Zhu
- Key Laboratory of Automobile Materials
- Ministry of Education
- and College of Materials Science and Engineering
- Jilin University
- Changchun 130022
| | - Lixue Jiang
- Key Laboratory of Automobile Materials
- Ministry of Education
- and College of Materials Science and Engineering
- Jilin University
- Changchun 130022
| | - Qing Jiang
- Key Laboratory of Automobile Materials
- Ministry of Education
- and College of Materials Science and Engineering
- Jilin University
- Changchun 130022
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