1
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Li R, Takata T, Zhang B, Feng C, Wu Q, Cui C, Zhang Z, Domen K, Li Y. Criteria for Efficient Photocatalytic Water Splitting Revealed by Studying Carrier Dynamics in a Model Al-doped SrTiO 3 Photocatalyst. Angew Chem Int Ed Engl 2023; 62:e202313537. [PMID: 37857989 DOI: 10.1002/anie.202313537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 10/09/2023] [Accepted: 10/19/2023] [Indexed: 10/21/2023]
Abstract
Overall water splitting (OWS) using semiconductor photocatalysts is a promising method for solar fuel production. Achieving a high quantum efficiency is one of the most important prerequisites for photocatalysts to realize high solar-to-fuel efficiency. In a recent study (Nature 2020, 58, 411-414), a quantum efficiency of almost 100 % has been achieved in an aluminum-doped strontium titanate (SrTiO3 : Al) photocatalyst. Herein, using the SrTiO3 : Al as a model photocatalyst, we reveal the criteria for efficient photocatalytic water splitting by investigating the carrier dynamics through a comprehensive photoluminescence study. It is found that the Al doping suppresses the generation of Ti3+ recombination centers in SrTiO3 , the surface band bending facilitates charge separation, and the in situ photo-deposited Rh/Cr2 O3 and CoOOH co-catalysts render efficient charge extraction. By suppressing photocarrier recombination and establishing a facile charge separation and extraction mechanism, high quantum efficiency can be achieved even on photocatalysts with a very short (sub-ns) intrinsic photocarrier lifetime, challenging the belief that a long carrier lifetime is a fundamental requirement. Our findings could provide guidance on the design of OWS photocatalysts toward more efficient solar-to-fuel conversion.
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Affiliation(s)
- Ronghua Li
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Tsuyoshi Takata
- Research Initiative for Supra-Materials (RISM), Shinshu University, Nagano, 380-8553, Japan
| | - Beibei Zhang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Chao Feng
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Qianbao Wu
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Chunhua Cui
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Zemin Zhang
- School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - Kazunari Domen
- Research Initiative for Supra-Materials (RISM), Shinshu University, Nagano, 380-8553, Japan
- Office of University Professors, The University of Tokyo, Tokyo, 113-8656, Japan
| | - Yanbo Li
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China
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2
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Ruan J, Zhong T, Guo Y. Enhanced water splitting over ethylenediaminetetraacetate treated SrTiO 3 photocatalysts with high crystallinity, reduced size, and surface nanostructure. J Colloid Interface Sci 2023; 650:1424-1433. [PMID: 37481780 DOI: 10.1016/j.jcis.2023.07.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 06/27/2023] [Accepted: 07/08/2023] [Indexed: 07/25/2023]
Abstract
The key elements that influence the properties and capabilities of particulate photocatalysts are their crystallinity, size, and surface active sites. However, simultaneously controlling these three variables remains a challenge. In this study, we present the first exploration into the use of a simple ethylenediaminetetraacetate (EDTA) etching technique to decrease the particle size and increase the surface active sites of photocatalysts while preserving their high crystallinity. By employing SrTiO3 as a model photocatalyst, we were able to create an ordered step nanostructure on the surface of sintered SrTiO3. As a result of the EDTA treatment, the particle size was reduced while the crystallinity was maintained. The separation of photogenerated electrons and holes is enhanced by the combination of reduced particle size and high crystallinity. To enhance chemical reaction activities, the organized surface nano-step structures serve as high-activity sites. As a result, when subjected to simulated light irradiation, the EDTA-treated SrTiO3 samples demonstrate improved photocatalytic performance for water splitting into H2 and O2 in a stoichiometric amount that is 3.8 times greater than that of untreated SrTiO3. Since EDTA interacts with most metals, this simple EDTA etching technique has the potential to be further developed to modify additional photocatalysts with exceptional performance for a variety of applications.
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Affiliation(s)
- Jiajun Ruan
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China; Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Rongjiang Laboratory), Jieyang 515200, China
| | - Tao Zhong
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China; Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Rongjiang Laboratory), Jieyang 515200, China
| | - Yuxi Guo
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China; Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Rongjiang Laboratory), Jieyang 515200, China.
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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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He D, Wang W, Feng N, Zhang Z, Zhou D, Zhang J, Luo H, Li Y, Chen X, Wu J. Defect-Modified nano-BaTiO 3 as a Sonosensitizer for Rapid and High-Efficiency Sonodynamic Sterilization. ACS APPLIED MATERIALS & INTERFACES 2023; 15:15140-15151. [PMID: 36929922 DOI: 10.1021/acsami.2c23113] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Multidrug-resistant bacteria caused by the unlimited overuse of antibiotics pose a great challenge to global health. An antibacterial method based on reactive oxygen species (ROS) is one of the effective strategies without inducing bacterial resistance. Owing to the ability of generating ROS, piezocatalytic material-mediated sonodynamic therapy (SDT) has drawn much attention. However, its major challenge is the low ROS generation efficiency in the piezocatalytic process due to the poor charge carrier concentration of piezoelectric materials. Vacancy engineering can regulate the charge density and largely promote ROS generation under ultrasound (US) irradiation. Herein, a US-responsive self-doped barium titanate with controlled oxygen vacancy (Vo) concentrations was successfully synthesized through a facile thermal reduction treatment at different temperatures (i.e., 350, 400, and 450 °C), and the corresponding samples were named as BTO-350, BTO-400, and BTO-450, respectively. Then, the effect of Vo concentrations on ROS generation efficiency during the piezocatalytic process was systematically studied. And BTO-400 was found to possess the highest piezocatalytic activity and excellent sonodynamic antibacterial performance against Escherichia coli and Staphylococcus aureus. Furthermore, its antibacterial mechanism was confirmed that the ROS generated under US could damage bacterial cell membrane and cause considerable leakage of cytoplasmic components and irreversible death of bacteria. Notably, the in vivo results illustrated that the BTO-400 could serve as an effective antibacterial agent and accelerate skin healing via SDT therapy. In all, the Vo defect-modified nano-BaTiO3 has a noticeable potential to induce a rapid and efficient sterilization as well as skin tissue repair by SDT.
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Affiliation(s)
- Dongcai He
- College of Materials Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Weijie Wang
- College of Materials Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Nan Feng
- Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Ziqiang Zhang
- College of Materials Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Dali Zhou
- College of Materials Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Jing Zhang
- College of Architecture and Environment, Sichuan University, Chengdu 610065, Sichuan, China
| | | | - Yunfeng Li
- Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xianchun Chen
- College of Polymer Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Jiagang Wu
- College of Materials Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
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5
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Zhu Y, Azough F, Liu X, Zhong X, Zhao M, Margaronis K, Kar-Narayan S, Kinloch I, Lewis DJ, Freer R. Precursor-Led Grain Boundary Engineering for Superior Thermoelectric Performance in Niobium Strontium Titanate. ACS APPLIED MATERIALS & INTERFACES 2023; 15:13097-13107. [PMID: 36854123 PMCID: PMC10020962 DOI: 10.1021/acsami.2c22712] [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: 12/19/2022] [Accepted: 02/16/2023] [Indexed: 06/18/2023]
Abstract
We present a novel method to significantly enhance the thermoelectric performance of ceramics in the model system SrTi0.85Nb0.15O3 through the use of the precursor ammonium tetrathiomolybdate (0.5-2% w/w additions). After sintering the precursor-infused green body at 1700 K for 24 h in 5% H2/Ar, single-crystal-like electron transport behavior developed with electrical conductivity reaching ∼3000 S/cm at ∼300 K, almost a magnitude higher than that in the control sample. During processing, the precursor transformed into MoS2, then into MoOx, and finally into Mo particles. This limited grain growth promoted secondary phase generation but importantly helped to reduce the grain boundary barriers. Samples prepared with additions of the precursor exhibited vastly increased electrical conductivity, without significant impact on Seebeck coefficients giving rise to high power factor values of 1760 μW/mK2 at ∼300 K and a maximum thermoelectric figure-of-merit zT of 0.24 at 823 K. This processing strategy provides a simple method to achieve high charge mobility in polycrystalline titanate and related materials and with the potential to create "phonon-glass-electron-crystal" oxide thermoelectric materials.
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Affiliation(s)
- Yibing Zhu
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
| | - Feridoon Azough
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
| | - Xiaodong Liu
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
| | - Xiangli Zhong
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
| | - Minghao Zhao
- Department
of Chemistry, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
| | - Kalliope Margaronis
- Department
of Materials Science & Metallurgy, University
of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, U.K.
| | - Sohini Kar-Narayan
- Department
of Materials Science & Metallurgy, University
of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, U.K.
| | - Ian Kinloch
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
- Henry
Royce Institute and National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - David J. Lewis
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
| | - Robert Freer
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
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6
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Jia Q, Wang C, Liu J, Cai X, Zhong L, Chen S, Li T, Yu G, Wu LZ, Duan D. Synergistic Effect of Sr-O Divacancy and Exposing Facets in SrTiO 3 Micro/Nano Particle: Accelerating Exciton Formation and Splitting, Highly Efficient Co 2+ Photooxidation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2202659. [PMID: 36059245 DOI: 10.1002/smll.202202659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 07/17/2022] [Indexed: 06/15/2023]
Abstract
As a typical perovskite-type crystal, polyhedral strontium titanate (SrTiO3 ) has shown anisotropic charge transport behavior in recent studies, however, the carrier transportation and transition of which has not been explained very clearly. This work present the existence of Sr and O divacancies in the novel rhombicuboctahedron SrTiO3 micro/nano particles (Sr1- x TiO3- x /TiO2- x ) with exposing (100), (110) and (111) facets and the diameter of 300-700 nm synthesized via hydrothermal synthesis, and also summarizes the dissociation mechanism of self-trapped excitons (STEs) caused by the divacancy and facet effect. In addition, most importantly, the metastable STEs with ultra-low binding energy (Eb < 3 meV) under illumination are discovered. Combining the model of S-scheme heterojunction, a conversion mechanism of photoinduced carriers is proposed. The photocatalytic reaction of Co2+ is used as the probe reaction, and the unique Sr1- x TiO3- x /TiO2- x possesses a high photooxidation efficiency of Co2+ , by which 70.3% of Co2+ is oxidized to Co3+ (CoOOH) in 5 min. This finding may provide a guideline for an optimal design of the photocatalytic materials for the recovery and extraction of metal ions based on SrTiO3 .
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Affiliation(s)
- Qibo Jia
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Chuyu Wang
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jian Liu
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xiaojiao Cai
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Li Zhong
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Siming Chen
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Ting Li
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Gangqiang Yu
- Faculty of Environment and Life, Beijing University of Technology, Beijing, 100124, P. R. China
| | - Li-Zhu Wu
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Dongping Duan
- CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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7
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Low-frequency acoustic irradiation coupled photocatalytic degradation of dye pollutant using LaNi0.5Co0.5O3/g-C3N4 nanocatalyst. J Taiwan Inst Chem Eng 2022. [DOI: 10.1016/j.jtice.2022.104570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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8
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Su Z, Fang F, Li X, Han W, Liu X, Chang K. Synergistic surface oxygen defect and bulk Ti3+ defect engineering on SrTiO3 for enhancing photocatalytic overall water splitting. J Colloid Interface Sci 2022; 626:662-673. [DOI: 10.1016/j.jcis.2022.06.109] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/13/2022] [Accepted: 06/21/2022] [Indexed: 10/31/2022]
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9
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Fang F, Xu R, Su Z, Li J, Sun R, Guo D, Chang K. Insight of SrCl2 as an Appropriate Flux Medium in Synthesizing Al-Doped SrTiO3 Photocatalyst for Overall Water Splitting. Catal Letters 2022. [DOI: 10.1007/s10562-022-04048-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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10
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Sun H, Dong C, Huang A, Zhan H, Wang G, Liu W, Ma B, Wang W. Transition Metal Doping Induces Ti 3+ to Promote the Performance of SrTiO 3 @TiO 2 Visible Light Photocatalytic Reduction of CO 2 to Prepare C1 Product. Chemistry 2022; 28:e202200019. [PMID: 35266216 DOI: 10.1002/chem.202200019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Indexed: 11/07/2022]
Abstract
Transition metal Fe, Co, Ni and Cu doped strontium titanate-rich SrTiO3 @TiO2 (STO@T) materials were prepared by hydrothermal method. The prepared doped materials exhibit better photocatalytic CO2 reduction to CH4 ability under visible light conditions. Among them, Fe-doped and undoped SrTiO3 @TiO2 under visible light conditions CO2 reduction products only CO, while M-STO@T (M=Co, Ni, Cu) samples converted CO2 to CH4 . The average methane yield of Ni-doped STO@T samples are as high as 73.85 μmol g-1 h-1 . The production of methane is mainly due to the increase in the response of the doped samples to visible light. And the increase in the separation rate of photogenerated electrons and holes and the efficiency of electron transport caused by the generation of impurity levels. The impurity level caused by Ti3+ plays an important role in the production of methane by CO2 visible light reduction. Ni doping effectively improves the photocatalytic performance of STO@T and CO2 reduction mechanism were explained.
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Affiliation(s)
- Hao Sun
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, P. R. China
| | - Cunlu Dong
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, P. R. China
| | - Aijun Huang
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, P. R. China
| | - Haijuan Zhan
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, P. R. China
| | - Gang Wang
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, P. R. China
| | - Wanyi Liu
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, P. R. China
| | - Baojun Ma
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, P. R. China
| | - Wei Wang
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, P. R. China
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11
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Lim J, Choi E, Kim M, Lee M, Chen D, Green MA, Seidel J, Kim C, Park J, Hao X, Yun JS. Revealing the Dynamics of the Thermal Reaction between Copper and Mixed Halide Perovskite Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2022; 14:20866-20874. [PMID: 35499459 DOI: 10.1021/acsami.2c01061] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Copper (Cu) is present not only in the electrode for inverted-structure halide perovskite solar cells (PSCs) but also in transport layers such as copper iodide (CuI), copper thiocyanate (CuSCN), and copper phthalocyanine (CuPc) alternatives to spiro-OMeTAD due to their improved thermal stability. While Cu or Cu-incorporated materials have been effectively utilized in halide perovskites, there is a lack of thorough investigation on the direct reaction between Cu and a perovskite under thermal stress. In this study, we investigated the thermal reaction between Cu and a perovskite as well as the degradation mechanism by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Kelvin probe force microscopy (KPFM). The results show that high temperatures of 100 °C induce Cu to be incorporated into the perovskite lattice by forming "Cu-rich yet organic A-site-poor" perovskites, (CuxA1-x)PbX3, near the grain boundaries, which result in device performance degradation.
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Affiliation(s)
- Jihoo Lim
- Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Eunyoung Choi
- Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Moonyong Kim
- Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Minwoo Lee
- Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, NSW 2052, Australia
- School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Daniel Chen
- Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, NSW 2052, Australia
- Sundrive Solar, Kirrawee, NSW 2232, Australia
| | - Martin A Green
- Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Jan Seidel
- School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Changheon Kim
- Solar Energy R&D Department, Green Energy Institute, Mokpo, Chonnam 58656, Republic of Korea
| | - Jongsung Park
- Department of Energy Engineering, Gyeongsang National University, Jinju 52849, Republic of Korea
| | - Xiaojing Hao
- Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Jae Sung Yun
- Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, NSW 2052, Australia
- Department of Electrical and Electronic Engineering, Advanced Technology Institute (ATI), University of Surrey, Guildford GU2 7XH, United Kingdom
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12
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Insight into the effect of OH modification on the piezo-photocatalytic hydrogen production activity of SrTiO 3. J Colloid Interface Sci 2022; 612:111-120. [PMID: 34983011 DOI: 10.1016/j.jcis.2021.10.170] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/21/2021] [Accepted: 10/27/2021] [Indexed: 11/24/2022]
Abstract
Surface modification by hydrophilic functional group have a tremendous influence on the catalytic activity of photocatalyst, however, there are few reports on improving piezoelectric catalytic performance through surface functionalization. Herein, OH-modified SrTiO3 was successfully obtained via a novel low-temperature solid-state precursor method and employed as a catalyst for photocatalytic, piezocatalytic and piezo-photocatalytic hydrogen production. Thanks to the super hydrophilic that is facilitating the contact of catalyst and water molecular and the more oxygen vacancies that can promote electron-hole separation, the photocatalytic, piezocatalytic and piezo-photocatalytic hydrogen generation of OH-modified SrTiO3 (OH-STO) is about two times higher than pristine SrTiO3 (STO). It is worth mentioning that the optimal piezo-photocatalytic hydrogen evolution rate of OH-STO (701.2 µmol h-1 g-1) is 5.3 times higher than the photocatalytic hydrogen evolution process of STO. This study presents a low-energy approach to the rational design of functional group modification nanomaterials that possess excellent piezo-photocatalytic performance.
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13
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Su Z, Fang F, Liu S, Wang N, Wan Y, Guo D, Han W, Chang K. Size-dependent Al-doped SrTiO 3 affecting solar-driven overall water splitting. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01146h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The equilibrium relationship between the charge transfer and gas evolution capacities of reasonable size Al-STO nanoparticles induces the balance point of HER and OER half-reactions.
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Affiliation(s)
- Zhiyuan Su
- Centre for Hydrogenergy, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, PR China
| | - Fan Fang
- Centre for Hydrogenergy, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, PR China
| | - Shuaishuai Liu
- Centre for Hydrogenergy, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, PR China
| | - Ni Wang
- Centre for Hydrogenergy, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, PR China
| | - Yutong Wan
- Centre for Hydrogenergy, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, PR China
| | - Donglei Guo
- Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, 471934, People's Republic of China
| | - Wenjun Han
- Centre for Hydrogenergy, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, PR China
| | - Kun Chang
- Centre for Hydrogenergy, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, PR China
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Evangelista AJ, Ivanchenko M, Jing H. Efficient Near-Infrared-Activated Photocatalytic Hydrogen Evolution from Ammonia Borane with Core-Shell Upconversion-Semiconductor Hybrid Nanostructures. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:3237. [PMID: 34947585 PMCID: PMC8707141 DOI: 10.3390/nano11123237] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 11/23/2021] [Accepted: 11/26/2021] [Indexed: 11/16/2022]
Abstract
In this work, the photocatalytic hydrogen evolution from ammonia borane under near-infrared laser irradiation at ambient temperature was demonstrated by using the novel core-shell upconversion-semiconductor hybrid nanostructures (NaGdF4:Yb3+/Er3+@NaGdF4@Cu2O). The particles were successfully synthesized in a final concentration of 10 mg/mL. The particles were characterized via high resolution transmission electron microscopy (HRTEM), photoluminescence, energy dispersive X-ray analysis (EDAX), and powder X-ray diffraction. The near-infrared-driven photocatalytic activities of such hybrid nanoparticles are remarkably higher than that with bare upconversion nanoparticles (UCNPs) under the same irradiation. The upconverted photoluminescence of UCNPs efficiently reabsorbed by Cu2O promotes the charge separation in the semiconducting shell, and facilitates the formation of photoinduced electrons and hydroxyl radicals generated via the reaction between H2O and holes. Both serve as reactive species on the dissociation of the weak B-N bond in an aqueous medium, to produce hydrogen under near-infrared excitation, resulting in enhanced photocatalytic activities. The photocatalyst of NaGdF4:Yb3+/Er3+@NaGdF4@Cu2O (UCNPs@Cu2O) suffered no loss of efficacy after several cycles. This work sheds light on the rational design of near-infrared-activated photocatalysts, and can be used as a proof-of-concept for on-board hydrogen generation from ammonia borane under near-infrared illumination, with the aim of green energy suppliers.
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Affiliation(s)
| | | | - Hao Jing
- Department of Chemistry and Biochemistry, George Mason University, Fairfax, VA 22030, USA; (A.J.E.); (M.I.)
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15
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Zhang G, Xu Y, Mi H, Zhang P, Li H, Lu Y. Donor Bandgap Engineering without Sacrificing the Reduction Ability of Photogenerated Electrons in Crystalline Carbon Nitride. CHEMSUSCHEM 2021; 14:4516-4524. [PMID: 34363651 DOI: 10.1002/cssc.202101431] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 07/25/2021] [Indexed: 06/13/2023]
Abstract
Crystalline carbon nitride (CCN) with a light response up to 700 nm has been seldom reported but is significant for the artificial photocatalysis. In this study, it is proposed that, unlike acceptors, introducing donors can effectively narrow the bandgap without sacrificing the reduction ability of photogenerated electrons, which is more advantageous to photocatalytic reduction reactions. Hence, a series of heptazine-based K+ -implanted CCN (KCN) with a narrow bandgap (2.87-1.86 eV) are constructed by copolymerization of pyrimidine donors. The optimized photocatalysts can extend the light response to 700 nm and account for approximately 122- and 33-fold enhancements in H2 production (λ>500 nm) in comparison to CN and KCN, respectively. The apparent quantum efficiency (AQE) can reach 8.2 % at 500 nm and is comparable to the top-level CN- and CCN- based materials. Its photoactive wavelength has significant advantages over previously reported CCN-based photocatalysts. This method offers a universal donor bandgap engineering strategy towards photocatalytic reduction reactions.
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Affiliation(s)
- Guoqiang Zhang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, P. R. China
| | - Yangsen Xu
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, Guangdong, 518060, P. R. China
| | - Hongwei Mi
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, P. R. China
- Guangdong Flexible Wearable Energy and Tools Engineering Technology Research Center, Shenzhen University, Shenzhen, Guangdong, 518060, P. R. China
| | - Peixin Zhang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, P. R. China
- Guangdong Flexible Wearable Energy and Tools Engineering Technology Research Center, Shenzhen University, Shenzhen, Guangdong, 518060, P. R. China
| | - Haowen Li
- Micro Optical Instruments (Shenzhen) Inc., Guangdong Engineering Research Center for Intelligent Spectroscopy, Shenzhen, Guangdong, 518118, P. R. China
| | - Yujuan Lu
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, P. R. China
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16
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Cui J, Yang X, Yang Z, Sun Y, Chen X, Liu X, Wang D, Jiang S, Liu L, Ye J. Zr-Al co-doped SrTiO 3 with suppressed charge recombination for efficient photocatalytic overall water splitting. Chem Commun (Camb) 2021; 57:10640-10643. [PMID: 34581715 DOI: 10.1039/d1cc04514h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zr-Al co-doped SrTiO3 with reduced Ti3+ concentration demonstrates more than 2 times enhancement compared with Al-doped SrTiO3 in photocatalytic overall water splitting. Systematic studies reveal that the co-doping of Zr4+ can reduce the substitution of Ti4+ by Al3+ and effectively suppress the formation of charge carrier recombination centers (Ti3+).
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Affiliation(s)
- Jiwei Cui
- TJU-NIMS International Collaboration Laboratory, Key Lab of Advanced Ceramics and Machining Technology (Ministry of Education) and Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin 300072, P. R. China.
| | - Xinmin Yang
- TJU-NIMS International Collaboration Laboratory, Key Lab of Advanced Ceramics and Machining Technology (Ministry of Education) and Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin 300072, P. R. China.
| | - Zhongshan Yang
- TJU-NIMS International Collaboration Laboratory, Key Lab of Advanced Ceramics and Machining Technology (Ministry of Education) and Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin 300072, P. R. China.
| | - Yanhui Sun
- TJU-NIMS International Collaboration Laboratory, Key Lab of Advanced Ceramics and Machining Technology (Ministry of Education) and Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin 300072, P. R. China.
| | - Xin Chen
- TJU-NIMS International Collaboration Laboratory, Key Lab of Advanced Ceramics and Machining Technology (Ministry of Education) and Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin 300072, P. R. China.
| | - Xiaolu Liu
- TJU-NIMS International Collaboration Laboratory, Key Lab of Advanced Ceramics and Machining Technology (Ministry of Education) and Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin 300072, P. R. China.
| | - Defa Wang
- TJU-NIMS International Collaboration Laboratory, Key Lab of Advanced Ceramics and Machining Technology (Ministry of Education) and Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin 300072, P. R. China.
| | - Shaokun Jiang
- Purification Equipment Research Institute of Handan, Handan 056000, Hebei, China
| | - Lequan Liu
- TJU-NIMS International Collaboration Laboratory, Key Lab of Advanced Ceramics and Machining Technology (Ministry of Education) and Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin 300072, P. R. China.
| | - Jinhua Ye
- TJU-NIMS International Collaboration Laboratory, Key Lab of Advanced Ceramics and Machining Technology (Ministry of Education) and Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin 300072, P. R. China. .,International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan
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Liu X, Xie H, Qu X, Yu K, Yin H, Song Q, Ning Z. Electrochemical potential controlling preparation of oxygen vacancies modified SrTiO3 with Ti3+ and Ti2+ self-doping in molten salt. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122387] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Zhang S, Si Y, Li B, Yang L, Dai W, Luo S. Atomic-Level and Modulated Interfaces of Photocatalyst Heterostructure Constructed by External Defect-Induced Strategy: A Critical Review. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2004980. [PMID: 33289948 DOI: 10.1002/smll.202004980] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 10/26/2020] [Indexed: 06/12/2023]
Abstract
Despite the existence of numerous photocatalyst heterostructures, their separation efficiency and charge flow precision remain low due to the poor study on interfacial properties. The photocatalysts with confined defects can effectively control the photogenerated carrier migration, but the metastability of such defects considerably decreases the photocatalyst stability. Meanwhile, the introduction of defective region can increase the coordinative unsaturation and delocalize local electrons to promote their interactions with the molecules/ions in that region. The selective growth of modulated heterogeneous interface by defect-induced strategy may not only increase the stability of defective structures, but also enhance the migration of interfacial charges. Using this method, photocatalytic heterostructures with low contact resistances and intimate interfaces are constructed to achieve the optimal charge migration in terms of efficiency and accuracy. In this work, the point, linear, and planar heterogeneous interfaces and related defect engineering techniques are discussed. Particularly, it is focused on the external, defect-induced interfacial heterogeneities with various spatial and dimensional configurations, which exhibit modulated and controllable interfacial properties. Furthermore, the main aspects of fabricating photocatalyst heterostructures by the defect-induced strategy, including the i) controllable generation of defects, ii) advanced characterization methods, and iii) elaborate construction of the minimal interface, are described.
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Affiliation(s)
- Shuqu Zhang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
| | - Yanmei Si
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
| | - Bing Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
| | - Lixia Yang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
| | - Weili Dai
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
| | - Shenglian Luo
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
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19
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Oral B, Saadetnejad D, Yıldırım R. Photocatalytic hydrogen production on chemically etched strontium titanate surfaces. REACTION KINETICS MECHANISMS AND CATALYSIS 2020. [DOI: 10.1007/s11144-020-01872-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Wei H, Cai J, Zhang Y, Zhang X, Baranova EA, Cui J, Wang Y, Shu X, Qin Y, Liu J, Wu Y. Synthesis of SrTiO 3 submicron cubes with simultaneous and competitive photocatalytic activity for H 2O splitting and CO 2 reduction. RSC Adv 2020; 10:42619-42627. [PMID: 35514889 PMCID: PMC9057969 DOI: 10.1039/d0ra08246e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Accepted: 11/11/2020] [Indexed: 11/21/2022] Open
Abstract
Single crystalline strontium titanate (SrTiO3) submicron cubes have been synthesized based on a molten salt method. The submicron cubes showed superior photocatalytic activity towards both water splitting and carbon dioxide reduction, in which methane (CH4) and hydrogen (H2) were simultaneously produced. The average production rate of methane up to 8 h is 4.39 μmol g-1 h-1 but drops to 0.46 μmol g-1 h-1. However, the average production rate of hydrogen is 14.52 before 8 h but then increases to 120.23 μmol g-1 h-1 after 8 h. The rate change of the two processes confirms the competition between the H2O splitting and CO2 reduction reactions. Band structure and surface characteristics of the SrTiO3 submicron cubes were characterized by diffuse reflective UV-Vis spectroscopy, Mott-Schottky analysis, X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). The results reveal that the simultaneous and competitive production of methane and hydrogen is due to a thermodynamics factor, as well as the competition between the adsorption of carbon dioxide and water molecules on the surface of the faceted SrTiO3. This work demonstrates that SrTiO3 photocatalysts are efficient in producing sustainable fuels via water splitting and carbon dioxide reduction reactions.
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Affiliation(s)
- Haoshan Wei
- School of Materials Science and Engineering, Hefei University of Technology Hefei 230009 Anhui China
- Key Laboratory of Advanced Functional Materials and Devices of Anhui Province Hefei 230009 Anhui China
| | - Jingyi Cai
- School of Materials Science and Engineering, Hefei University of Technology Hefei 230009 Anhui China
- Key Laboratory of Advanced Functional Materials and Devices of Anhui Province Hefei 230009 Anhui China
| | - Yong Zhang
- School of Materials Science and Engineering, Hefei University of Technology Hefei 230009 Anhui China
- Key Laboratory of Advanced Functional Materials and Devices of Anhui Province Hefei 230009 Anhui China
| | - Xueru Zhang
- Instrumental Analysis Center, Hefei University of Technology Hefei 230009 China
| | - Elena A Baranova
- China International S&T Cooperation Base for Advanced Energy and Environmental Materials Hefei 230009 Anhui China
- Department of Chemical and Biological Engineering, Centre for Catalysis Research and Innovation (CCRI), University of Ottawa 161 Louis-Pasteur Ottawa ON K1N 6N5 Canada
| | - Jiewu Cui
- School of Materials Science and Engineering, Hefei University of Technology Hefei 230009 Anhui China
- Key Laboratory of Advanced Functional Materials and Devices of Anhui Province Hefei 230009 Anhui China
| | - Yan Wang
- School of Materials Science and Engineering, Hefei University of Technology Hefei 230009 Anhui China
- Key Laboratory of Advanced Functional Materials and Devices of Anhui Province Hefei 230009 Anhui China
| | - Xia Shu
- School of Materials Science and Engineering, Hefei University of Technology Hefei 230009 Anhui China
- Key Laboratory of Advanced Functional Materials and Devices of Anhui Province Hefei 230009 Anhui China
| | - Yongqiang Qin
- School of Materials Science and Engineering, Hefei University of Technology Hefei 230009 Anhui China
- Key Laboratory of Advanced Functional Materials and Devices of Anhui Province Hefei 230009 Anhui China
| | - Jiaqin Liu
- Key Laboratory of Advanced Functional Materials and Devices of Anhui Province Hefei 230009 Anhui China
- Institute of Industry & Equipment Technology, Hefei University of Technology Hefei 230009 Anhui China
| | - Yucheng Wu
- School of Materials Science and Engineering, Hefei University of Technology Hefei 230009 Anhui China
- Key Laboratory of Advanced Functional Materials and Devices of Anhui Province Hefei 230009 Anhui China
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21
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Ye C, Wang R, Wang H, Jiang F. The high photocatalytic efficiency and stability of LaNiO 3/g-C 3N 4 heterojunction nanocomposites for photocatalytic water splitting to hydrogen. BMC Chem 2020; 14:65. [PMID: 33292406 PMCID: PMC7596961 DOI: 10.1186/s13065-020-00719-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 10/17/2020] [Indexed: 11/16/2022] Open
Abstract
A binary direct Z-scheme LaNiO3/g-C3N4 nanocomposite photocatalyst consisted with LaNiO3 nanoparticles and g-C3N4 nanosheets was successfully synthesized by means of mechanical mixing and solvothermal methods in order to improve the photocatalytic water splitting activity. The as-prepared materials were characterized by powder X-ray diffraction (XRD), Scanning Electron microscope (SEM), Transmission Electron microscope (TEM), X-ray photoelectron spectroscope (XPS), Fourier Transform Infrared Spectroscopy (FT-IR) and N2 adsorption–desorption experiments, respectively, demonstrating the formation of interfacial interaction and heterogeneous structure in LaNiO3/g-C3N4 nanocomposites. Under UV-light irradiation, the LaNiO3/g-C3N4 samples which without the addition of any noble metal as co-catalyst behaved enhanced photocatalytic water splitting activity compared with pure LaNiO3 and g-C3N4, owing to the Z-scheme charge carrier transfer pathway. Especially, the LaNiO3/70%g-C3N4 nanocomposite reach an optimal yield of up to 3392.50 µmol g−1 in 5 h and held a maximum H2 evolution rate of 678.5 µmol h−1 g−1 that was 5 times higher than that of pure LaNiO3. ![]()
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Affiliation(s)
- Changyu Ye
- Department of Chemistry, Beijing Normal University, Beijing, 100875, China
| | - Rui Wang
- Department of Chemistry, Beijing Normal University, Beijing, 100875, China
| | - Haoyu Wang
- Department of Chemistry, Beijing Normal University, Beijing, 100875, China
| | - Fubin Jiang
- Department of Chemistry, Beijing Normal University, Beijing, 100875, China.
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22
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Kumar A, Kumar A, Krishnan V. Perovskite Oxide Based Materials for Energy and Environment-Oriented Photocatalysis. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02947] [Citation(s) in RCA: 205] [Impact Index Per Article: 51.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Ashish Kumar
- School of Basic Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi, Himachal Pradesh 175075, India
| | - Ajay Kumar
- School of Basic Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi, Himachal Pradesh 175075, India
| | - Venkata Krishnan
- School of Basic Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi, Himachal Pradesh 175075, India
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23
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Zhang M, Cheng G, Wei Y, Wen Z, Chen R, Xiong J, Li W, Han C, Li Z. Cuprous ion (Cu+) doping induced surface/interface engineering for enhancing the CO2 photoreduction capability of W18O49 nanowires. J Colloid Interface Sci 2020; 572:306-317. [DOI: 10.1016/j.jcis.2020.03.090] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 03/22/2020] [Accepted: 03/23/2020] [Indexed: 10/24/2022]
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24
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Yu X, Wang J, Fu X, Meng H, Zhu Y, Zhang Y. Construction of Z-scheme SrTiO3/Ag/Ag3PO4 photocatalyst with oxygen vacancies for highly efficient degradation activity towards tetracycline. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116718] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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25
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Ling J, Wang K, Wang Z, Huang H, Zhang G. Enhanced piezoelectric-induced catalysis of SrTiO 3 nanocrystal with well-defined facets under ultrasonic vibration. ULTRASONICS SONOCHEMISTRY 2020; 61:104819. [PMID: 31669844 DOI: 10.1016/j.ultsonch.2019.104819] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 08/11/2019] [Accepted: 10/01/2019] [Indexed: 06/10/2023]
Abstract
Facet engineering of nanocomposite has been confirmed to be an efficient strategy to accelerate their catalytic performances, but to improve their piezoelectric catalytic activities by facet engineering has been seldom reported. Herein, we developed a series of SrTiO3 nanocrystals with exposed {0 0 1} facet, dominant {1 1 0} facet and co-exposed {0 0 1} and {1 1 0} facets, respectively, and firstly revealed its piezoelectric catalytic performance under ultrasonic vibration. Moreover, the relationship between piezoelectric-induced catalytic activity and facet-dependence of SrTiO3 nanocrystal was disclosed for the first time. The SrTiO3 nanocrystal with co-exposed {0 0 1} and {1 1 0} facets exhibited effectively enhanced piezoelectric catalytic activity by degrading Rhodamine B (RhB) under ultrasonic vibration, as compared to that of SrTiO3 nanocrystals with exposed {0 0 1} facet and dominant {1 1 0} facet, respectively. In addition, trapping experiments and active species quantitative experiments confirmed that the co-exposed {0 0 1} and {1 1 0} facets were beneficial to produce O2- and OH with the generation rates of 8.3 and 132.2 μmol g-1 h-1, respectively. The OH radical played a dominant role in piezoelectric catalytic process. Finally, the piezoelectric catalysis mechanism of SrTiO3 surface heterojunction was proposed based on a DFT study. This study presents an in-depth understanding of piezoelectric-induced catalytic of perovskite nanocrystals with exposed well-defined facets.
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Affiliation(s)
- Jiasen Ling
- State Key Laboratory of Silicate Materials for Architectures, Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China
| | - Kai Wang
- State Key Laboratory of Silicate Materials for Architectures, Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China
| | - Zeyan Wang
- State Key Lab of Crystal Materials, Shandong University, Jinan 250100, China
| | - Haitao Huang
- Department of Applied Physics, The Hong Kong Polytechnic University, China
| | - Gaoke Zhang
- State Key Laboratory of Silicate Materials for Architectures, Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
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26
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Zhang G, Ling X, Liu G, Xu Y, Xiao S, Zhang Q, Yang X, Qiu C, Mi H, Su C. Construction of Defective Zinc-Cadmium-Sulfur Nanorods for Visible-Light-Driven Hydrogen Evolution Without the Use of Sacrificial Agents or Cocatalysts. CHEMSUSCHEM 2020; 13:756-762. [PMID: 31840937 DOI: 10.1002/cssc.201902889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 12/15/2019] [Indexed: 06/10/2023]
Abstract
Solar-driven H2 evolution is an essential process for sustainable energy development. Currently, the greatest challenge is the development of efficient photocatalysts to drive this reaction, especially in pure water systems (without the use of a sacrificial agent). In this study, structural defects in Zn-Cd-S nanorod photocatalysts are found to increase charge separation efficiency significantly by sevenfold. Efficient H2 evolution (352.7 μmol h-1 g-1 , 100 mg of catalyst) is achieved by using this defective Zn-Cd-S nanorod photocatalyst in the absence of sacrificial agents and precious metal cocatalysts under visible-light irradiation. Thus, this cocatalyst- and sacrificial-agent-free, visible-light-responsive system shows remarkable potential as a new artificial photosynthesis route for green H2 production.
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Affiliation(s)
- Guoqiang Zhang
- International Collaborative Laboratory of 2 D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, P.R. China
- Department College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, P.R. China
| | - Xiang Ling
- International Collaborative Laboratory of 2 D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, P.R. China
| | - Guoshuai Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, P.R. China
| | - Yangsen Xu
- International Collaborative Laboratory of 2 D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, P.R. China
| | - Shuning Xiao
- International Collaborative Laboratory of 2 D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, P.R. China
| | - Qitao Zhang
- International Collaborative Laboratory of 2 D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, P.R. China
| | - Xun Yang
- School of Physics, Zhengzhou University, Zhengzhou, 450052, P.R. China
| | - Chuntian Qiu
- International Collaborative Laboratory of 2 D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, P.R. China
| | - Hongwei Mi
- Department College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, P.R. China
| | - Chenliang Su
- International Collaborative Laboratory of 2 D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, P.R. China
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Zhang G, Yang X, Li Y, Zhang P, Mi H. Donor-Acceptor Cyanocarbazole-Based Supramolecular Photocatalysts for Visible-Light-Driven H 2 Production. CHEMSUSCHEM 2019; 12:5070-5074. [PMID: 31738007 DOI: 10.1002/cssc.201902553] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 10/16/2019] [Accepted: 10/24/2019] [Indexed: 06/10/2023]
Abstract
Highly efficient, stable, and metal-free supramolecular photocatalysts for H2 production are uncommon and of significant interest. In this study, a donor-acceptor (D-A) cyanocarbazole-based supramolecule (2CzPN) is assembled by intermolecular C≡N⋅⋅⋅H-Ar H-bonding interactions to form an efficient, stable, and metal-free photocatalyst for H2 evolution. The catalyst affords an H2 production rate of 91.8 μmol h-1 (20 mg of samples, λ>420 nm) and a corresponding apparent quantum efficiency of 7.5 % at 420 nm. The photon-generated carrier separation of the 2CzPN supramolecule, which is higher than that of the analogous polymer, can be attributed to the strong D-A characteristics and high crystallinity. This study offers the first experimental evidence of visible-light H2 evolution among D-A cyanocarbazole-based supramolecules and it enriches the variety of supramolecular photocatalysts. This stable and effective metal-free 2CzPN supramolecular photocatalyst has obvious advantages among very few supramolecular photocatalysts for H2 production.
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Affiliation(s)
- Guoqiang Zhang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, P.R. China
| | - Xun Yang
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, P.R. China
| | - Yongliang Li
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, P.R. China
| | - Peixin Zhang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, P.R. China
- Guangdong Flexible Wearable Energy and Tools Engineering Technology Research Centre, Shenzhen University, Shenzhen, Guangdong, 518060, P.R. China
| | - Hongwei Mi
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, P.R. China
- Guangdong Flexible Wearable Energy and Tools Engineering Technology Research Centre, Shenzhen University, Shenzhen, Guangdong, 518060, P.R. China
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Zhou X, Liu N, Yokosawa T, Osvet A, Miehlich ME, Meyer K, Spiecker E, Schmuki P. Intrinsically Activated SrTiO 3: Photocatalytic H 2 Evolution from Neutral Aqueous Methanol Solution in the Absence of Any Noble Metal Cocatalyst. ACS APPLIED MATERIALS & INTERFACES 2018; 10:29532-29542. [PMID: 30088904 DOI: 10.1021/acsami.8b08564] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Noble metal cocatalysts are conventionally a crucial factor in oxide-semiconductor-based photocatalytic hydrogen generation. In the present work, we show that optimized high-temperature hydrogenation of commercially available strontium titanate (SrTiO3) powder can be used to engineer an intrinsic cocatalytic shell around nanoparticles that can create a photocatalyst that is highly effective without the use of any additional cocatalyst for hydrogen generation from neutral aqueous methanol solutions. This intrinsic activation effect can also be observed for SrTiO3[100] single crystal as well as Nb-doped SrTiO3[100] single crystal. For all types of SrTiO3 samples (nanopowders and either of the single crystals), hydrogenation under optimum conditions leads to a surface-hydroxylated layer together with lattice defects visible by transmission electron microscopy, electron paramagnetic resonance (EPR), and photoluminescence (PL). Active samples provide specific defects identified by EPR, PL, and electron-energy loss spectroscopy as Ti3+ states in a defective matrix-this is in contrast to the inactive defects formed in other reductive atmospheres. In aqueous media, active SrTiO3 samples show a significant negative shift of the flatband potential (in photoelectrochemical as well as in capacitance data) and a lower charge-transfer resistance for photoexcited electrons. We therefore ascribe the remarkable cocatalyst-free activation of the material to a synergy between thermodynamics (altered interface energetics induced by hydroxylation) and kinetics (charge transfer mediation by suitable Ti3+ states).
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Affiliation(s)
| | | | - Tadahiro Yokosawa
- Center for Nanoanalysis and Electron Microscopy (CENEM) , University of Erlangen-Nuremberg , Cauerstrasse 6 , 91058 Erlangen , Germany
| | | | - Matthias E Miehlich
- Department of Chemistry and Pharmacy, Inorganic & General Chemistry , University of Erlangen-Nuremberg , Egerlandstrasse 1 , 91058 Erlangen , Germany
| | - Karsten Meyer
- Department of Chemistry and Pharmacy, Inorganic & General Chemistry , University of Erlangen-Nuremberg , Egerlandstrasse 1 , 91058 Erlangen , Germany
| | - Erdmann Spiecker
- Center for Nanoanalysis and Electron Microscopy (CENEM) , University of Erlangen-Nuremberg , Cauerstrasse 6 , 91058 Erlangen , Germany
| | - Patrik Schmuki
- Department of Chemistry, Faculty of Science , King Abdulaziz University , P.O. Box 80203, Jeddah 21569 , Saudi Arabia
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Nishioka S, Hyodo J, Vequizo JJM, Yamashita S, Kumagai H, Kimoto K, Yamakata A, Yamazaki Y, Maeda K. Homogeneous Electron Doping into Nonstoichiometric Strontium Titanate Improves Its Photocatalytic Activity for Hydrogen and Oxygen Evolution. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01379] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shunta Nishioka
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
- Japan Society for the Promotion of Science, Kojimachi Business Center Building, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo 102-0083, Japan
| | - Junji Hyodo
- INAMORI Frontier Research Center, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Junie Jhon M. Vequizo
- Graduate School of Engineering, Toyota Technical Institute, 2-12-1 Hisakata, Tempaku, Nagoya, Aichi 468-8511, Japan
| | - Shunsuke Yamashita
- Electron Microscopy Group, Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Hiromu Kumagai
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Koji Kimoto
- Electron Microscopy Group, Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Akira Yamakata
- Graduate School of Engineering, Toyota Technical Institute, 2-12-1 Hisakata, Tempaku, Nagoya, Aichi 468-8511, Japan
| | - Yoshihiro Yamazaki
- INAMORI Frontier Research Center, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- Department of Materials Science and Engineering, Graduate School of Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- Kyushu University Platform of Inter-/Transdisciplinary Energy Research (Q-PIT), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kazuhiko Maeda
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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30
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Yoon HJ, Kim SK, Huang W, Sohn Y. Comparable electrocatalytic performances of carbon- and Rh-loaded SrTiO3 nanoparticles. CHINESE CHEM LETT 2018. [DOI: 10.1016/j.cclet.2018.01.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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31
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Liu QF, Zhang Q, Liu BR, Li S, Ma JJ. Building surface defects by doping with transition metal on ultrafine TiO2 to enhance the photocatalytic H2 production activity. CHINESE JOURNAL OF CATALYSIS 2018. [DOI: 10.1016/s1872-2067(18)63044-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Han K, Lin YC, Yang CM, Jong R, Mul G, Mei B. Promoting Photocatalytic Overall Water Splitting by Controlled Magnesium Incorporation in SrTiO 3 Photocatalysts. CHEMSUSCHEM 2017; 10:4510-4516. [PMID: 29072368 DOI: 10.1002/cssc.201701794] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 10/26/2017] [Indexed: 06/07/2023]
Abstract
SrTiO3 is a well-known photocatalyst inducing overall water splitting when exposed to UV irradiation of wavelengths <370 nm. However, the apparent quantum efficiency of SrTiO3 is typically low, even when functionalized with nanoparticles of Pt or Ni@NiO. Here, we introduce a simple solid-state preparation method to control the incorporation of magnesium into the perovskite structure of SrTiO3 . After deposition of Pt or Ni@NiO, the photocatalytic water-splitting efficiency of the Mg:SrTiOx composites is up to 20 times higher compared to SrTiO3 containing similar catalytic nanoparticles, and an apparent quantum yield (AQY) of 10 % can be obtained in the wavelength range of 300-400 nm. Detailed characterization of the Mg:SrTiOx composites revealed that Mg is likely substituting the tetravalent Ti ion, leading to a favorable surface-space-charge layer. This originates from tuning of the donor density in the cubic SrTiO3 structure by Mg incorporation and enables high oxygen-evolution rates. Nevertheless, interfacing with an appropriate hydrogen evolution catalyst is mandatory and non-trivial to obtain high-performance in water splitting.
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Affiliation(s)
- Kai Han
- Photocatalytic Synthesis Group, MESA+ Institute for Nanotechnology, Faculty of Science and Technology (TNW), University of Twente, Meander, P.O. Box 217-7500, AE, Enschede, The Netherlands
| | - Yen-Chun Lin
- Photocatalytic Synthesis Group, MESA+ Institute for Nanotechnology, Faculty of Science and Technology (TNW), University of Twente, Meander, P.O. Box 217-7500, AE, Enschede, The Netherlands
- Department of Chemistry, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Chia-Min Yang
- Department of Chemistry, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Ronald Jong
- Photocatalytic Synthesis Group, MESA+ Institute for Nanotechnology, Faculty of Science and Technology (TNW), University of Twente, Meander, P.O. Box 217-7500, AE, Enschede, The Netherlands
| | - Guido Mul
- Photocatalytic Synthesis Group, MESA+ Institute for Nanotechnology, Faculty of Science and Technology (TNW), University of Twente, Meander, P.O. Box 217-7500, AE, Enschede, The Netherlands
| | - Bastian Mei
- Photocatalytic Synthesis Group, MESA+ Institute for Nanotechnology, Faculty of Science and Technology (TNW), University of Twente, Meander, P.O. Box 217-7500, AE, Enschede, The Netherlands
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Gao S, Gu B, Jiao X, Sun Y, Zu X, Yang F, Zhu W, Wang C, Feng Z, Ye B, Xie Y. Highly Efficient and Exceptionally Durable CO 2 Photoreduction to Methanol over Freestanding Defective Single-Unit-Cell Bismuth Vanadate Layers. J Am Chem Soc 2017; 139:3438-3445. [PMID: 28208016 DOI: 10.1021/jacs.6b11263] [Citation(s) in RCA: 217] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Unearthing an ideal model for disclosing the role of defect sites in solar CO2 reduction remains a great challenge. Here, freestanding gram-scale single-unit-cell o-BiVO4 layers are successfully synthesized for the first time. Positron annihilation spectrometry and X-ray fluorescence unveil their distinct vanadium vacancy concentrations. Density functional calculations reveal that the introduction of vanadium vacancies brings a new defect level and higher hole concentration near Fermi level, resulting in increased photoabsorption and superior electronic conductivity. The higher surface photovoltage intensity of single-unit-cell o-BiVO4 layers with rich vanadium vacancies ensures their higher carriers separation efficiency, further confirmed by the increased carriers lifetime from 74.5 to 143.6 ns revealed by time-resolved fluorescence emission decay spectra. As a result, single-unit-cell o-BiVO4 layers with rich vanadium vacancies exhibit a high methanol formation rate up to 398.3 μmol g-1 h-1 and an apparent quantum efficiency of 5.96% at 350 nm, much larger than that of single-unit-cell o-BiVO4 layers with poor vanadium vacancies, and also the former's catalytic activity proceeds without deactivation even after 96 h. This highly efficient and spectrally stable CO2 photoconversion performances hold great promise for practical implementation of solar fuel production.
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Affiliation(s)
- Shan Gao
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials, International Center for Quantum Design of Functional Materials, Department of Physics, Synergetic Innovation Center of Quantum Information and Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science & Technology of China , Hefei, Anhui 230026, P. R. China
| | - Bingchuan Gu
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials, International Center for Quantum Design of Functional Materials, Department of Physics, Synergetic Innovation Center of Quantum Information and Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science & Technology of China , Hefei, Anhui 230026, P. R. China
| | - Xingchen Jiao
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials, International Center for Quantum Design of Functional Materials, Department of Physics, Synergetic Innovation Center of Quantum Information and Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science & Technology of China , Hefei, Anhui 230026, P. R. China
| | - Yongfu Sun
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials, International Center for Quantum Design of Functional Materials, Department of Physics, Synergetic Innovation Center of Quantum Information and Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science & Technology of China , Hefei, Anhui 230026, P. R. China
| | - Xiaolong Zu
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials, International Center for Quantum Design of Functional Materials, Department of Physics, Synergetic Innovation Center of Quantum Information and Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science & Technology of China , Hefei, Anhui 230026, P. R. China
| | - Fan Yang
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials, International Center for Quantum Design of Functional Materials, Department of Physics, Synergetic Innovation Center of Quantum Information and Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science & Technology of China , Hefei, Anhui 230026, P. R. China
| | - Wenguang Zhu
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials, International Center for Quantum Design of Functional Materials, Department of Physics, Synergetic Innovation Center of Quantum Information and Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science & Technology of China , Hefei, Anhui 230026, P. R. China
| | - Chengming Wang
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials, International Center for Quantum Design of Functional Materials, Department of Physics, Synergetic Innovation Center of Quantum Information and Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science & Technology of China , Hefei, Anhui 230026, P. R. China
| | - Zimou Feng
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials, International Center for Quantum Design of Functional Materials, Department of Physics, Synergetic Innovation Center of Quantum Information and Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science & Technology of China , Hefei, Anhui 230026, P. R. China
| | - Bangjiao Ye
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials, International Center for Quantum Design of Functional Materials, Department of Physics, Synergetic Innovation Center of Quantum Information and Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science & Technology of China , Hefei, Anhui 230026, P. R. China
| | - Yi Xie
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials, International Center for Quantum Design of Functional Materials, Department of Physics, Synergetic Innovation Center of Quantum Information and Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science & Technology of China , Hefei, Anhui 230026, P. R. China
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