1
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Song Y, Jian M, Qiao L, Zhao Z, Yang Y, Jiao T, Zhang Q. Efficient Removal and Recovery of Ag from Wastewater Using Charged Polystyrene-Polydopamine Nanocoatings and Their Sustainable Catalytic Application in 4-Nitrophenol Reduction. ACS APPLIED MATERIALS & INTERFACES 2024; 16:5834-5846. [PMID: 38261542 DOI: 10.1021/acsami.3c16414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
This study addresses the long-standing challenges of removing and recovering trace silver (Ag) ions from wastewater while promoting their sustainable catalysis utilization. We innovatively developed a composite material by combining charged sulfonated polystyrene (PS) with a PDA coating. This composite serves a dual purpose: effectively removing and recovering trace Ag+ from wastewater and enabling reused Ag for sustainable applications, particularly in the catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). The PS-PDA demonstrated exceptional selectivity to trace Ag+ recycling, which is equal to 14 times greater than the commercial ion exchanger. We emphasize the distinct roles of different charged functional groups in Ag+ removal and catalytic reduction performance. The negatively charged SO3H groups exhibited the remarkable ability to rapidly enrich trace Ag ions from wastewater, with a capacity 2-3 times higher than that of positively-N+(CH3)3Cl and netural-CH2Cl-modified composites; this resulted in an impressive 96% conversion of 4-NP to 4-AP within just 25 min. The fixed-bed application further confirmed the effective treatment capacity of approximately 4400 L of water per kilogram of adsorbent, while maintaining an extremely low effluent Ag+ concentration of less than 0.1 mg/L. XPS investigations provided valuable insights into the conversion of Ag+ ions into metallic Ag through the enticement of negatively charged SO3H groups and the in situ reduction facilitated by PDA. This breakthrough not only facilitates the efficient extraction of Ag from wastewater but also paves the way for its environmentally responsible utilization in catalytic reactions.
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Affiliation(s)
- Yaran Song
- State Key Laboratory of Metastable Materials Science and Technology, Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, Hebei Key Laboratory of Nano-biotechnology, Yanshan University, Qinhuangdao 066004, China
| | - Meili Jian
- State Key Laboratory of Metastable Materials Science and Technology, Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, Hebei Key Laboratory of Nano-biotechnology, Yanshan University, Qinhuangdao 066004, China
| | - Lili Qiao
- State Key Laboratory of Metastable Materials Science and Technology, Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, Hebei Key Laboratory of Nano-biotechnology, Yanshan University, Qinhuangdao 066004, China
| | - Ziyi Zhao
- State Key Laboratory of Metastable Materials Science and Technology, Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, Hebei Key Laboratory of Nano-biotechnology, Yanshan University, Qinhuangdao 066004, China
| | - Yujia Yang
- State Key Laboratory of Metastable Materials Science and Technology, Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, Hebei Key Laboratory of Nano-biotechnology, Yanshan University, Qinhuangdao 066004, China
| | - Tifeng Jiao
- State Key Laboratory of Metastable Materials Science and Technology, Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, Hebei Key Laboratory of Nano-biotechnology, Yanshan University, Qinhuangdao 066004, China
| | - Qingrui Zhang
- State Key Laboratory of Metastable Materials Science and Technology, Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, Hebei Key Laboratory of Nano-biotechnology, Yanshan University, Qinhuangdao 066004, China
- Hebei Province Engineering Research Center for Harmless Synergistic Treatment and Recycling of Municipal Solid Waste, Yanshan University, Qinhuangdao 066004, China
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2
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Fu X, Niemann VA, Zhou Y, Li S, Zhang K, Pedersen JB, Saccoccio M, Andersen SZ, Enemark-Rasmussen K, Benedek P, Xu A, Deissler NH, Mygind JBV, Nielander AC, Kibsgaard J, Vesborg PCK, Nørskov JK, Jaramillo TF, Chorkendorff I. Calcium-mediated nitrogen reduction for electrochemical ammonia synthesis. NATURE MATERIALS 2024; 23:101-107. [PMID: 37884670 DOI: 10.1038/s41563-023-01702-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 09/22/2023] [Indexed: 10/28/2023]
Abstract
Ammonia (NH3) is a key commodity chemical for the agricultural, textile and pharmaceutical industries, but its production via the Haber-Bosch process is carbon-intensive and centralized. Alternatively, an electrochemical method could enable decentralized, ambient NH3 production that can be paired with renewable energy. The first verified electrochemical method for NH3 synthesis was a process mediated by lithium (Li) in organic electrolytes. So far, however, elements other than Li remain unexplored in this process for potential benefits in efficiency, reaction rates, device design, abundance and stability. In our demonstration of a Li-free system, we found that calcium can mediate the reduction of nitrogen for NH3 synthesis. We verified the calcium-mediated process using a rigorous protocol and achieved an NH3 Faradaic efficiency of 40 ± 2% using calcium tetrakis(hexafluoroisopropyloxy)borate (Ca[B(hfip)4]2) as the electrolyte. Our results offer the possibility of using abundant materials for the electrochemical production of NH3, a critical chemical precursor and promising energy vector.
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Affiliation(s)
- Xianbiao Fu
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Valerie A Niemann
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Yuanyuan Zhou
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Shaofeng Li
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Ke Zhang
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Jakob B Pedersen
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Mattia Saccoccio
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Suzanne Z Andersen
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | | | - Peter Benedek
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Aoni Xu
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Niklas H Deissler
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | | | - Adam C Nielander
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Jakob Kibsgaard
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Peter C K Vesborg
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Jens K Nørskov
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark.
| | - Thomas F Jaramillo
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA.
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, CA, USA.
| | - Ib Chorkendorff
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark.
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3
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Kumar A, Sharma M, Sheoran S, Jaiswal S, Patra A, Bhattacharya S, Krishnan V. Tailoring defects in SrTiO 3 by one step nanoarchitectonics for realizing photocatalytic nitrogen fixation in pure water. NANOSCALE 2023. [PMID: 37378646 DOI: 10.1039/d3nr01982a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Surface contamination of materials by nitrogenous impurities is a major problem that can bias the quantification of ammonia in photocatalytic N2 fixation reactions. In this work, SrTiO3 nanocubes were prepared by using a nitrogenous precursor and engineered with Ti3+ sites and oxygen vacancy defects in a one-step solvothermal approach. It was observed that the synthesized materials were containing surface nitrogenous impurities and therefore a rigorous cleaning procedure was adopted to eliminate them to the best extent. The contribution of unavoidable surface impurities was deduced in the form of adventitious NH3 by employing control experiments and a realistic photocatalytic NH3 generation was achieved. It was found that pristine SrTiO3 showed no photocatalytic activity, whereas one of the defected SrTiO3 materials showed the highest NH3 formation under natural sunlight in pure water, which was ascribed to the tuned defect sites, enhanced surface area and efficient separation of photogenerated charges. Based on the experimental results, a stringent protocol has been suggested for materials synthesis while working with nitrogenous precursors and for subsequent photocatalytic N2 fixation experiments. Thus, the present study provides a simple and affordable procedure for catalyst synthesis for the studied application and expands the scope of perovskite oxide materials to fabricate efficient photocatalysts for sustainable NH3 production.
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Affiliation(s)
- Ashish Kumar
- School of Chemical Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi 175075, Himachal Pradesh, India.
- Department of Chemistry, Sardar Patel University Mandi, Mandi 175001, Himachal Pradesh, India
| | - Manisha Sharma
- School of Chemical Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi 175075, Himachal Pradesh, India.
| | - Sajjan Sheoran
- Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India.
| | - Shilpi Jaiswal
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Madhya Pradesh 462066, India.
| | - Abhijit Patra
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Madhya Pradesh 462066, India.
| | - Saswata Bhattacharya
- Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India.
| | - Venkata Krishnan
- School of Chemical Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi 175075, Himachal Pradesh, India.
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4
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Zhang M, Cao A, Zhang H, Yang C. Defective MNiFeO (M = Cu, Zn, Co, Mn) NRs derived from cation-exchanged Fe2Ni-MOFs for catalytic nitroarene hydrogenation. J Colloid Interface Sci 2022; 623:63-76. [DOI: 10.1016/j.jcis.2022.04.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 04/28/2022] [Accepted: 04/30/2022] [Indexed: 10/18/2022]
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5
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Shaw M, Samanta D, Bera S, Mahto MK, Salam Shaik MA, Konar S, Mondal I, Dhara D, Pathak A. Role of Surface Oxygen Vacancies and Oxygen Species on CuO Nanostructured Surfaces in Model Catalytic Oxidation and Reductions: Insight into the Structure-Activity Relationship Toward the Performance. Inorg Chem 2022; 61:14568-14581. [PMID: 35914234 DOI: 10.1021/acs.inorgchem.2c01467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Defect engineering, such as modification of oxygen vacancy density, has been considered as an effective approach to tailor the catalytic performance on transition-metal oxide nanostructured surfaces. The role of oxygen vacancies (OV) on the surface of the as-prepared, zinnia-shaped morphology of CuO nanostructures and their marigold forms on calcination at 800 °C has been investigated through the study of model catalytic reactions of reduction of 4-nitrophenol and aerobic oxidation of benzyl alcohol. The OV on the surfaces of different morphologies of CuO have been identified and quantified through Rietveld analysis and HRTEM, EPR, and XPS studies. The structure-activity relationships between surface oxygen vacancies (OV) and catalytic performance have been systematically investigated. The enhanced catalytic performance of the cubic CuO nanostructures compared to their as-prepared forms has been attributed to the formation of surface oxygen species on the reactive and dominant (110) surface that has low oxygen vacancy formation energy. The mechanistic role of surface oxygen species in the studied reactions has been quantitatively correlated with the catalytic activity of the different morphological forms of the CuO nanostructures.
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Affiliation(s)
- Manisha Shaw
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Dipanjan Samanta
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Sharmita Bera
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Madhusudan Kr Mahto
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Md Abdus Salam Shaik
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Suraj Konar
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India.,Department of Chemistry, R.D. & D.J. College, Munger, Bihar 811201, India
| | - Imran Mondal
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Dibakar Dhara
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Amita Pathak
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
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6
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Shi X, Yang J, Wen X, Tian F, Li C. Oxygen vacancy enhanced biomimetic superoxide dismutase activity of CeO2-Gd nanozymes. J RARE EARTH 2021. [DOI: 10.1016/j.jre.2020.06.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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7
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Liu T, Bai X. In situ preparation of highly dispersed Pd supported on exfoliated layered double hydroxides via nitrogen plasma for 4-nitrophenol reduction. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:30090-30100. [PMID: 33582960 DOI: 10.1007/s11356-021-12689-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/25/2021] [Indexed: 06/12/2023]
Abstract
In this work, a simple and environmental-friendly nitrogen glow discharge plasma reduction method has been developed for synthesizing palladium nanoparticles (PdNPs) supported on exfoliated Mg-Al-layered double hydroxide (Pd/LDH) catalysts. The as-prepared catalysts were characterized by means of characterizations methods, which contain X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectrometry (XPS), and Fourier transform infrared (FT-IR). Highly dispersed ultrafine PdNPs were supported on exfoliated, defect-induced LDHs uniformly without agglomeration. The effects of treatment time of nitrogen plasma and Pd loading amount on structure, morphology, and catalytic performance of Pd/LDHs were investigated. The comparisons of structure and morphology between LDHs and Pd/LDHs were also discussed. The average particle size of as-synthesized PdNPs with face-centered cubic structure is 2.01 nm, which ranges from 1.18 to 3.01 nm. Nitrogen plasma cannot only reduce Pd2+, but also exfoliate LDHs, introduce defects, and even destroy the structure of LDHs. The Pd/LDH catalyst with 1 wt% Pd loading under nitrogen plasma treatment for 60 min showed the best catalytic performance in 4-nitrophenol reduction. The turnover frequency (TOF) of as-prepared catalyst is 20-fold higher than that of commercial Pd/C catalyst.
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Affiliation(s)
- Teng Liu
- School of Chemistry and Material Sciences, Heilongjiang University, Harbin, 150080, People's Republic of China
| | - Xuefeng Bai
- School of Chemistry and Material Sciences, Heilongjiang University, Harbin, 150080, People's Republic of China.
- Institute of Petrochemistry, Heilongjiang Academy of Sciences, Harbin, 150040, People's Republic of China.
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8
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Fabrication of visible-light-driven Bi2O3-Bi3TaO7 nanocomposite for tetracycline degradation with enhanced photocatalytic efficiency. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.120894] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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9
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Huang S, Kou X, He D, Du C, Wang X, Su Y. Oxygen‐Vacancy‐Mediated Photocatalysis over Bi
2
Sn
2
O
7
: Exceptional Catalytic Activity and Selectivity. ChemCatChem 2019. [DOI: 10.1002/cctc.201900454] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Shushu Huang
- College of Chemistry and Chemical EngineeringInner Mongolia University Hohhot 010021 P.R. China
| | - Xin Kou
- College of Chemistry and Chemical EngineeringInner Mongolia University Hohhot 010021 P.R. China
| | - Dan He
- College of Chemistry and Chemical EngineeringInner Mongolia University Hohhot 010021 P.R. China
| | - Chunfang Du
- College of Chemistry and Chemical EngineeringInner Mongolia University Hohhot 010021 P.R. China
| | - Xiaojing Wang
- College of Chemistry and Chemical EngineeringInner Mongolia University Hohhot 010021 P.R. China
| | - Yiguo Su
- College of Chemistry and Chemical EngineeringInner Mongolia University Hohhot 010021 P.R. China
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10
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Sahiner N, Demirci S. The use of M@p(4‐VP) and M@p (VI) (M:Co, Ni, Cu) cryogel catalysts as reactor in a glass column in the reduction of p‐nitrophenol to p‐aminophenol under gravity. ASIA-PAC J CHEM ENG 2019. [DOI: 10.1002/apj.2305] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Nurettin Sahiner
- Faculty of Science & Arts, Department of ChemistryCanakkale Onsekiz Mart University Canakkale Turkey
- Nanoscience and Technology Research and Application Center (NANORAC)Canakkale Onsekiz Mart University Canakkale Turkey
| | - Sahin Demirci
- Faculty of Science & Arts, Department of ChemistryCanakkale Onsekiz Mart University Canakkale Turkey
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11
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Wang L, Xu X, Feng Z, Bian L, Wang Y. WO3-x based composite material with chitosan derived nitrogen doped mesoporous carbon as matrix for oxygen vacancy induced organic pollutants catalytic reduction and IR driven H2 production. J SOLID STATE CHEM 2018. [DOI: 10.1016/j.jssc.2018.04.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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12
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Huang S, Wang C, Sun H, Wang X, Su Y. Steering Charge Kinetics of Tin Niobate Photocatalysts: Key Roles of Phase Structure and Electronic Structure. NANOSCALE RESEARCH LETTERS 2018; 13:161. [PMID: 29796920 PMCID: PMC5966348 DOI: 10.1186/s11671-018-2578-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 05/16/2018] [Indexed: 06/08/2023]
Abstract
Tin niobate photocatalysts with the phase structures of froodite (SnNb2O6) and pyrochlore (Sn2Nb2O7) were obtained by a facile solvothermal method in order to explore the impact of phase structure and electronic structure on the charge kinetics and photocatalytic performance. By employing tin niobate as a model compound, the effects of phase structure over electronic structure, photocatalytic activity toward methyl orange solution and hydrogen evolution were systematically investigated. It is found that the variation of phase structure from SnNb2O6 to Sn2Nb2O7 accompanied with modulation of particle size and band edge potentials that has great consequences on photocatalytic performance. In combination with the electrochemical impedance spectroscopy (EIS), transient photocurrent responses, transient absorption spectroscopy (TAS), and the analysis of the charge-carrier dynamics suggested that variation of electronic structure has great impacts on the charge separation and transfer rate of tin niobate photocatalysts and the subsequent photocatalytic performance. Moreover, the results of the X-ray photoelectron spectroscopy (XPS) indicated that the existent of Sn4+ species in Sn2Nb2O7 could result in a decrease in photocatalytic activity. Photocatalytic test demonstrated that the SnNb2O6 (froodite) catalyst possesses a higher photocatalytic activity toward MO degradation and H2 evolution compared with the sample of Sn2Nb2O7 (pyrochlore). On the basis of spin resonance measurement and trapping experiment, it is expected that photogenerated holes, O2-•, and OH• active species dominate the photodegradation of methyl orange.
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Affiliation(s)
- Shushu Huang
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021 Inner Mongolia People’s Republic of China
| | - Chunyan Wang
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021 Inner Mongolia People’s Republic of China
| | - Hao Sun
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021 Inner Mongolia People’s Republic of China
| | - Xiaojing Wang
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021 Inner Mongolia People’s Republic of China
| | - Yiguo Su
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021 Inner Mongolia People’s Republic of China
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13
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Wang F, Wang T, Lang J, Su Y, Wang X. Improved photocatalytic activity and durability of AgTaO3/AgBr heterojunction: The relevance of phase and electronic structure. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.molcata.2016.11.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Liu X, Li Y, Xing Z, Zhao X, Liu N, Chen F. Monolithic carbon foam-supported Au nanoparticles with excellent catalytic performance in a fixed-bed system. NEW J CHEM 2017. [DOI: 10.1039/c7nj03018e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A MCF/Au monolith can be innovatively utilized to construct a fixed-bed system, which exhibits exceptional reduction performance for 4-nitrophenol.
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Affiliation(s)
- Xiang Liu
- Zhenjiang Key Laboratory of Functional Chemistry & Institute of Medicine & Chemical Engineering
- Zhenjiang College
- Zhenjiang 212000
- China
- Biofuels Institute of Jiangsu University
| | - Yan Li
- School of Pharmacy
- Taizhou Polytechnic College
- Taizhou 225300
- China
| | - Zheng Xing
- Zhenjiang Key Laboratory of Functional Chemistry & Institute of Medicine & Chemical Engineering
- Zhenjiang College
- Zhenjiang 212000
- China
| | - Xiaohua Zhao
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang 212013
- China
| | - Ningning Liu
- Zhenjiang Key Laboratory of Functional Chemistry & Institute of Medicine & Chemical Engineering
- Zhenjiang College
- Zhenjiang 212000
- China
| | - Fangyuan Chen
- Zhenjiang Key Laboratory of Functional Chemistry & Institute of Medicine & Chemical Engineering
- Zhenjiang College
- Zhenjiang 212000
- China
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15
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Xing G, Zhao L, Sun T, Su Y, Wang X. Hydrothermal derived nitrogen doped SrTiO3 for efficient visible light driven photocatalytic reduction of chromium(VI). SPRINGERPLUS 2016; 5:1132. [PMID: 27478749 PMCID: PMC4951392 DOI: 10.1186/s40064-016-2804-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 07/11/2016] [Indexed: 11/10/2022]
Abstract
In this work, we report on the synthesis of nitrogen doped SrTiO3 nanoparticles with efficient visible light driven photocatalytic activity toward Cr(VI) by the solvothermal method. The samples are carefully characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV–Vis diffuse reflectance spectroscopy and photocatalytic test. It is found that nitrogen doping in SrTiO3 lattice led to an apparent lattice expansion, particle size reduction as well as subsequent increase of Brunner–Emmet–Teller surface area. The visible light absorption edge and intensity can be modulated by nitrogen doping content, which absorption edge extends to about 600 nm. Moreover, nitrogen doping can not only modulate the visible light absorption feature, but also have consequence on the enhancement of charge separation efficiency, which can promote the photocatalytic activity. With well controlled particle size, Brunner–Emmet–Teller surface area, and electronic structure via nitrogen doping, the photocatalytic performance toward Cr(VI) reduction of nitrogen doped SrTiO3 was optimized at initial hexamethylenetetramine content of 2.
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Affiliation(s)
- Guanjie Xing
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021 People's Republic of China
| | - Lanxiao Zhao
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021 People's Republic of China
| | - Tao Sun
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021 People's Republic of China
| | - Yiguo Su
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021 People's Republic of China
| | - Xiaojing Wang
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021 People's Republic of China
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16
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Guo M, He J, Li Y, Ma S, Sun X. One-step synthesis of hollow porous gold nanoparticles with tunable particle size for the reduction of 4-nitrophenol. JOURNAL OF HAZARDOUS MATERIALS 2016; 310:89-97. [PMID: 26905608 DOI: 10.1016/j.jhazmat.2016.02.016] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 02/01/2016] [Accepted: 02/04/2016] [Indexed: 05/25/2023]
Abstract
Hollow porous gold nanoparticles (HPGNPs) were synthesized via a one-step solution phase method at ambient temperature. The particle size, ranging from 80nm to 350nm, was easily controlled by changing the concentration of HAuCl4. The morphology and the structure of the as-prepared HPGNPs were investigated by SEM, TEM, HRTEM and XPS. Langmuir isotherm analysis yielded values of 8973m(2)/g for the outer surface area and 58724m(2)/g for the inner surface area for the 80nm HPGNPs. Due to a special hollow porous nanostructure, the HPGNPs exhibited superior catalytic activity and stability for the reduction of 4-nitrophenol (4-NP). No significant inactivation of the 80nm HPGNPs was observed, even after recycling for six cycles or storing for more than 1 month. Due to these excellent properties, it is expected that HPGNPs can be used in such applications as water pollutant removal and environmental remediation.
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Affiliation(s)
- Mingzhen Guo
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, PR China
| | - Jiang He
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, PR China.
| | - Yan Li
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, PR China
| | - Shuang Ma
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, PR China
| | - Xiaohan Sun
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, PR China
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Gu Q, Zhu K, Sun Q, Liu J, Wang J, Qiu J, Wang J. A metastable cubic phase of sodium niobate nanoparticles stabilized by chemically bonded solvent molecules. Phys Chem Chem Phys 2016; 18:33171-33179. [DOI: 10.1039/c6cp07423e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A facile and green alternative was provided to prepare a metastable phase of cubic NaNbO3 nanoparticles. A new insight into the stabilization of cubic NaNbO3 nanoparticles by chemically bonded organic molecules was proposed on the basis of systematic structural and surface analyses.
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Affiliation(s)
- Qilin Gu
- State Key Laboratory of Mechanics and Control of Mechanical Structures
- College of Aerospace Engineering
- Nanjing University of Aeronautics and Astronautics
- Nanjing
- China
| | - Kongjun Zhu
- State Key Laboratory of Mechanics and Control of Mechanical Structures
- College of Aerospace Engineering
- Nanjing University of Aeronautics and Astronautics
- Nanjing
- China
| | - Qiaomei Sun
- State Key Laboratory of Mechanics and Control of Mechanical Structures
- College of Aerospace Engineering
- Nanjing University of Aeronautics and Astronautics
- Nanjing
- China
| | - Jinsong Liu
- College of Materials Science and Engineering
- Nanjing University of Aeronautics and Astronautics
- Nanjing 210016
- China
| | - Jing Wang
- State Key Laboratory of Mechanics and Control of Mechanical Structures
- College of Aerospace Engineering
- Nanjing University of Aeronautics and Astronautics
- Nanjing
- China
| | - Jinhao Qiu
- State Key Laboratory of Mechanics and Control of Mechanical Structures
- College of Aerospace Engineering
- Nanjing University of Aeronautics and Astronautics
- Nanjing
- China
| | - John Wang
- Department of Materials Science and Engineering
- National University of Singapore
- Singapore 117576
- Singapore
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