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Alikarami S, Soltanizadeh A, Rashchi F. Enhancing decomposition of rhodamine (RhB) and methylene blue (MB) using CdS decorated with Ag or Ru driven by visible radiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:62847-62866. [PMID: 36947379 DOI: 10.1007/s11356-023-26542-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 03/15/2023] [Indexed: 05/10/2023]
Abstract
The development of photocatalysts has an influential role in solving the environmental pollution crisis. Herein, the two different noble metals of silver (Ag)/ruthenium (Ru) were separately decorated on cadmium sulfide (CdS) photocatalysts by novel chemical methods. Characterization tests confirmed the formation of Ag/Ru-decorated CdS with spherical morphologies. According to the DRS and PL experiments, Ru-decorated CdS accounted for the highest light absorbance and the most accelerated transfer and detachment of photoelectrons/holes, followed by Ag-decorated CdS compared to pure CdS, which brought proper optical properties of Ag/Ru-decorated CdS. The photodecomposition of methylene blue (MB)/rhodamine B (RhB) as dyes and phenol as a colorless pollutant in the presence of Ag-decorated CdS (96%, 95%, and 69%) and Ru-decorated CdS (100%, 100%, and 80%) exposed to visible light radiation climbed compared to pure CdS (80%, 67%, and 61%) respectively. The influence of various parameters on the MB/RhB photocatalytic activity was investigated. The quenching experiment determined the functions of active species. Finally, experimental results proved that the MB/RhB photodecomposition by Ag/Ru-decorated CdS followed the pseudo-first-order kinetic model.
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Affiliation(s)
- Somayeh Alikarami
- School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Ali Soltanizadeh
- School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Fereshteh Rashchi
- School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran.
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Han W, Yang J, Jiang B, Wang X, Wang C, Guo L, Sun Y, Liu F, Sun P, Lu G. Conductometric ppb-Level CO Sensors Based on In 2O 3 Nanofibers Co-Modified with Au and Pd Species. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3267. [PMID: 36234395 PMCID: PMC9565841 DOI: 10.3390/nano12193267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/11/2022] [Accepted: 09/14/2022] [Indexed: 06/16/2023]
Abstract
Carbon monoxide (CO) is one of the most toxic gases to human life. Therefore, the effective monitoring of it down to ppb level is of great significance. Herein, a series of In2O3 nanofibers modified with Au or Pd species or simultaneous Au and Pd species have been prepared by electrospinning combined with a calcination process. The as-obtained samples are applied for the detection of CO. Gas-sensing investigations indicate that 2 at% Au and 2 at% Pd-co-modified In2O3 nanofibers exhibit the highest response (21.7) to 100 ppm CO at 180 °C, and the response value is ~8.5 times higher than that of pure In2O3 nanofibers. More importantly, the detection limit to CO is about 200 ppb with a response value of 1.23, and is obviously lower than that (6 ppm) of pure In2O3 nanofibers. In addition, the sensor also shows good stability within 19 days. These demonstrate that co-modifying In2O3 nanofibers with suitable amounts of Pd and Au species might be a meaningful strategy for the development of high-performance carbon monoxide gas sensors.
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Affiliation(s)
- Wenjiang Han
- State Key Laboratory of Integrated Optoelectronics, Jilin Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Jiaqi Yang
- State Key Laboratory of Integrated Optoelectronics, Jilin Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Bin Jiang
- State Key Laboratory of Integrated Optoelectronics, Jilin Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Xi Wang
- State Key Laboratory of Integrated Optoelectronics, Jilin Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Chong Wang
- College of Communication Engineering, Jilin University, Changchun 130022, China
| | - Lanlan Guo
- School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo 454003, China
| | - Yanfeng Sun
- State Key Laboratory of Integrated Optoelectronics, Jilin Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Fangmeng Liu
- State Key Laboratory of Integrated Optoelectronics, Jilin Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
- International Center of Future Science, Jilin University, Changchun 130012, China
| | - Peng Sun
- State Key Laboratory of Integrated Optoelectronics, Jilin Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
- International Center of Future Science, Jilin University, Changchun 130012, China
| | - Geyu Lu
- State Key Laboratory of Integrated Optoelectronics, Jilin Key Laboratory of Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
- International Center of Future Science, Jilin University, Changchun 130012, China
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Yang W, Ou Q, Yan X, Liu L, Liu S, Chen H, Liu Y. High Sensing Performance Toward Acetone Vapor Using TiO 2 Flower-Like Nanomaterials. NANOSCALE RESEARCH LETTERS 2022; 17:82. [PMID: 36053407 PMCID: PMC9440186 DOI: 10.1186/s11671-022-03721-4] [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: 04/13/2022] [Accepted: 08/20/2022] [Indexed: 06/15/2023]
Abstract
For real-application gas sensors, high performances (response, selectivity, response/recovery time and stability) are demanded. An effective strategy is applying nanomaterials in gas sensors. In this study, the anatase TiO2 flower-like nanomaterials (FLNMs) are prepared through a one-step hydrothermal method which exhibit high-performance toward acetone vapor. TiO2 FLNMs sensors property are characterized at optimal working temperature of 330 °C with selectivity (acetone), response (S = 33.72 toward 250 ppm acetone), linear dependence (R2 = 0.9913), response/recovery time (46/24 s toward 250 ppm acetone) and long-term stability (30 days). These demonstrate that TiO2 FLNMs get a high performance for acetone sensor. Moreover, the limit of detection of acetone is 0.65 ppm which is lower than that of exhaled air for diabetes (0.8 ppm), indicating that TiO2 FLNMs gas sensor gets potential application in medical diagnosis.
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Affiliation(s)
- Weiye Yang
- Yunnan Key Laboratory of Opto-Electronic Information Technology, Yunnan Normal University, Kunming, 650500, China
- Institute of Physics and Electronic Information, Yunnan Normal University, Kunming, 650500, China
- Key Laboratory of Advanced Technique and Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, 650500, China
- Zunyi Medical University, Zunyi, 563000, China
| | - Quanhong Ou
- Yunnan Key Laboratory of Opto-Electronic Information Technology, Yunnan Normal University, Kunming, 650500, China
- Institute of Physics and Electronic Information, Yunnan Normal University, Kunming, 650500, China
- Key Laboratory of Advanced Technique and Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, 650500, China
| | - Xueqian Yan
- Yunnan Key Laboratory of Opto-Electronic Information Technology, Yunnan Normal University, Kunming, 650500, China
- Institute of Physics and Electronic Information, Yunnan Normal University, Kunming, 650500, China
- Key Laboratory of Advanced Technique and Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, 650500, China
| | - Lei Liu
- Yunnan Key Laboratory of Opto-Electronic Information Technology, Yunnan Normal University, Kunming, 650500, China
- Institute of Physics and Electronic Information, Yunnan Normal University, Kunming, 650500, China
- Key Laboratory of Advanced Technique and Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, 650500, China
| | - Shaoyu Liu
- Yunnan Key Laboratory of Opto-Electronic Information Technology, Yunnan Normal University, Kunming, 650500, China
- Institute of Physics and Electronic Information, Yunnan Normal University, Kunming, 650500, China
- Key Laboratory of Advanced Technique and Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, 650500, China
| | - Huohuo Chen
- Yunnan Key Laboratory of Opto-Electronic Information Technology, Yunnan Normal University, Kunming, 650500, China
- Institute of Physics and Electronic Information, Yunnan Normal University, Kunming, 650500, China
- Key Laboratory of Advanced Technique and Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, 650500, China
| | - Yingkai Liu
- Yunnan Key Laboratory of Opto-Electronic Information Technology, Yunnan Normal University, Kunming, 650500, China.
- Institute of Physics and Electronic Information, Yunnan Normal University, Kunming, 650500, China.
- Key Laboratory of Advanced Technique and Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, 650500, China.
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4
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Nami-Ana SF, Nasresfahani S, Tashkhourian J, Shamsipur M, Zargarpour Z, Sheikhi MH. Nanofibers of Polyaniline and Cu(II)-l-Aspartic Acid for a Room-Temperature Carbon Monoxide Gas Sensor. ACS APPLIED MATERIALS & INTERFACES 2021; 13:39791-39805. [PMID: 34397209 DOI: 10.1021/acsami.1c07116] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In the present study, the carbon monoxide (CO) sensing property of Cu(II)-l-aspartic acid nanofibers/polyaniline (PANI) nanofibers composite was investigated at room temperature. The nanofiber composite was formed through the ultrasound mixing of emeraldine salt PANI nanofibers and Cu(II)-l-aspartic acid nanofibers, which were synthesized by using a polymerization process and simple self-assembly method, respectively. The nanofibers composite demonstrated a branched structure in which the Cu(II)-l-aspartic acid nanofiber framework is similar to the trunk of a tree and the polyaniline nanofibers is like its branches. It seems that this special structure and one-dimension/one-dimension interface are suitable for gas adsorption and sensing. The performance of the prepared sensor toward CO gas was investigated at room temperature in a wide concentration range (200-8000 ppm). The experimental results indicate that the incorporation of amino acid-based copper metal-biomolecule framework nanofibers to PANI nanofibers enhances the response value (12.41% to 4000 ppm), yielding good selectivity and acceptable response and recovery characteristics (220 s/240 s) at room temperature. The detection limit of Cu(II)-l-aspartic acid nanofibers/PANI nanofibers sensor for carbon monoxide is obtained at 120 ppm.
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Affiliation(s)
- S F Nami-Ana
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71456, Iran
| | - Sh Nasresfahani
- Department of Electrical and Computer Engineering, Golpayegan College of Engineering, Isfahan University of Technology, Golpayegan 87717-67498, Iran
| | - J Tashkhourian
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71456, Iran
| | - M Shamsipur
- Department of Chemistry, Razi University, Kermanshah 67149, Iran
| | - Z Zargarpour
- School of Electrical and Computer Engineering, Shiraz University, Shiraz 71456, Iran
| | - M H Sheikhi
- School of Electrical and Computer Engineering, Shiraz University, Shiraz 71456, Iran
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Ye XL, Lin SJ, Zhang JW, Jiang HJ, Cao LA, Wen YY, Yao MS, Li WH, Wang GE, Xu G. Boosting Room Temperature Sensing Performances by Atomically Dispersed Pd Stabilized via Surface Coordination. ACS Sens 2021; 6:1103-1110. [PMID: 33576603 DOI: 10.1021/acssensors.0c02369] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The urgent requirement of monitoring air pollution worldwide evokes intensive research interest in developing chemiresistive gas sensing techniques. To overcome the limits in sensitivity and selectivity of room temperature (RT) chemiresistive sensing materials, a new strategy using single-atom catalysts (SACs) via surface coordination is proposed. As a proof-of-concept, single Pd atoms on TiO2 (Pd1-TiO2) possess high efficiency in generating adsorbed O2- as well as high activity and selectivity in catalyzing CO oxidation at RT. As a result, Pd1-TiO2 shows record high sensitivity among the reported RT sensing materials, which is even comparable to those of the best materials working at high temperature. It also provides an approximately 1 order of magnitude lower limit of detection than the best CO sensing materials. Moreover, Pd1-TiO2 presents high selectivity toward 12 kinds of interference gases. This work not only paves a way to design high-performance RT gas sensing materials but also extends the application of SACs.
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Affiliation(s)
- Xiao-Liang Ye
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS), Fuzhou, Fujian 350002, P. R. China
| | - Shu-Juan Lin
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS), Fuzhou, Fujian 350002, P. R. China
| | - Jiang-Wei Zhang
- Dalian National Laboratory for Clean Energy & State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Dalian, Liaoning 116023, P. R. China
| | - Hui-Jie Jiang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS), Fuzhou, Fujian 350002, P. R. China
| | - Lin-An Cao
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS), Fuzhou, Fujian 350002, P. R. China
| | - Ying-Yi Wen
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS), Fuzhou, Fujian 350002, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Ming-Shui Yao
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS), Fuzhou, Fujian 350002, P. R. China
| | - Wen-Hua Li
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS), Fuzhou, Fujian 350002, P. R. China
| | - Guan-E Wang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS), Fuzhou, Fujian 350002, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Gang Xu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS), Fuzhou, Fujian 350002, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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6
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Meng J, Li Z. Schottky-Contacted Nanowire Sensors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2000130. [PMID: 32484268 DOI: 10.1002/adma.202000130] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 03/16/2020] [Accepted: 03/22/2020] [Indexed: 06/11/2023]
Abstract
The progress of the Internet-of-Things in the past few years has necessitated the support of high-performance sensors. Schottky-contacted nanowire sensors have attracted considerable attention owing to their high sensitivity and fast response time. Their progress is reviewed here, based on several kinds of important nanowires, for applications such as bio/chemical sensors, gas sensors, photodetectors, and strain sensors. Although Schottky-contacted nanowire sensors deliver excellent performance in these fields, they can be further improved by various methods, including defect engineering, surface modification, the piezotronic effect, and the piezophototronic effect, all of which are discussed here. With regard to practical applications, further efforts are required to address challenges such as the stability, selectivity, ultrafast response, multifunctionality, flexibility, distributed energy supply, and sustainability of Schottky-contacted nanowire sensors. Finally, future perspectives and solutions are discussed.
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Affiliation(s)
- Jianping Meng
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, China
| | - Zhou Li
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
- Center of Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China
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7
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GaN/Ga2O3 Core/Shell Nanowires Growth: Towards High Response Gas Sensors. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9173528] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The development of sensors working in a large range of temperature is of crucial importance in areas such as monitoring of industrial processes or personal tracking using smart objects. Devices integrating GaN/Ga2O3 core/shell nanowires (NWs) are a promising solution for monitoring carbon monoxide (CO). Because the performances of sensors primarily depend on the material properties composing the active layer of the device, it is essential to control them and achieve material synthesis in the first time. In this work, we investigate the synthesis of GaN/Ga2O3 core-shell NWs with a special focus on the formation of the shell. The GaN NWs grown by plasma-assisted molecular beam epitaxy, are post-treated following thermal oxidation to form a Ga2O3-shell surrounding the GaN-core. We establish that the shell thickness can be modulated from 1 to 14 nm by changing the oxidation conditions and follows classical oxidation process: A first rapid oxide-shell growth, followed by a reduced but continuous oxide growth. We also discuss the impact of the atmosphere on the oxidation growth rate. By combining XRD-STEM and EDX analyses, we demonstrate that the oxide-shell is crystalline, presents the β-Ga2O3 phase, and is synthesized in an epitaxial relationship with the GaN-core.
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Qiu Y, Lin C, Li J, Zhang L, Xu L, Zhao Y, Du XX, Wang L, Pan F, Liao F, Sun J. Discovery of Layered Indium Hydroxide via a Hydroperoxyl Anion Coordinated Precursor at Room Temperature. Chemistry 2018; 24:15491-15494. [PMID: 30113745 DOI: 10.1002/chem.201803093] [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: 06/17/2018] [Indexed: 11/08/2022]
Abstract
All reported layered metal hydroxides have brucite-like metal-hydroxyl host layers, and the discovery of other types of layered metal hydroxides could significantly extend the layered metal hydroxide families, which is meaningful in both theory and applications. Here, through hydroperoxyl anion coordinated In3+ cations as a precursor, a new layered indium hydroxide was synthesized, where only a three-dimensional cubic phase had existed before. The layer of the product exhibits an unusual structure where In(OH)6 octahedra share edges and vertexes with each other to form layers, which is completely different from the common edge-sharing brucite-like metal-hydroxyl layers. By investigating the formation mechanism, the new layered structure is found to be formed by changing the traditional crystallization path through the hydroperoxyl anion coordinated intermediates. Many other new phases could also be discovered by following the same intrinsic principle.
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Affiliation(s)
- Yaming Qiu
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Cong Lin
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China.,College of Chemistry and Chemical Engineering, Chongqing University, NO. 174 Shazheng Street, Shapingba District, Chongqing, 400044, P. R. China
| | - Jian Li
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Lei Zhang
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Le Xu
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Yifang Zhao
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - X Xin Du
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Ligang Wang
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Fengjuan Pan
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Fuhui Liao
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Junliang Sun
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
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Zhang H, Qin H, Gao C, Hu J. An Ultrahigh Sensitivity Acetone Sensor Enhanced by Light Illumination. SENSORS (BASEL, SWITZERLAND) 2018; 18:E2318. [PMID: 30018252 PMCID: PMC6068944 DOI: 10.3390/s18072318] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 07/13/2018] [Accepted: 07/15/2018] [Indexed: 11/22/2022]
Abstract
Au:SmFe0.9Zn0.1O₃ is synthesized by a sol-gel method and annealed at 750 °C. Through XRD, SEM and XPS analysis methods, the microstructure of the material has been observed. The average particle size is about 50 nm. The sensor shows a high sensitivity toward acetone vapor. As the relative humidity increases, the resistance and sensitivity of the sensor decline. To obtain a low optimum operating temperature, light illumination with different wavelengths has been introduced. The sensitivity toward acetone is improved at lower operating temperature when the sensor is irradiated by light. The smaller the wavelengths, the better the sensitivity of the sensor. Compared with other gases, the sensor shows excellent selectivity to acetone vapor, with better sensitivity, selectivity and stability when under light illumination.
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Affiliation(s)
- Heng Zhang
- School of Physics, State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100, China.
| | - Hongwei Qin
- School of Physics, State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100, China.
| | - Chengyong Gao
- School of Physics, State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100, China.
| | - Jifan Hu
- School of Physics, State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100, China.
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Zhang H, Qin H, Zhang P, Hu J. High Sensing Properties of 3 wt % Pd-Doped SmFe 1- xMg xO 3 Nanocrystalline Powders to Acetone Vapor with Ultralow Concentrations under Light Illumination. ACS APPLIED MATERIALS & INTERFACES 2018; 10:15558-15564. [PMID: 29671566 DOI: 10.1021/acsami.7b17281] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nanocrystalline powders of 3 wt % Pd-doped SmFe1- xMg xO3 ( x = 0, 0.1, 0.2, and 0.3) were prepared by a sol-gel method and annealed at 750 °C. Pd:SmFe0.9Mg0.1O3 has a maximum response at 220 °C. When exposed to 0.5 ppm acetone vapor, the response of undoped SmFeO3 is 2.26 and the response of Pd:SmFe0.9Mg0.1O3 is 7.16. Under light illumination, Pd:SmFe0.9Mg0.1O3 has a better sensing performance and lower optimal operating temperature. The sensor shows good selectivity and stability for acetone vapor. The high response and good selectivity of Pd:SmFe0.9Mg0.1O3 to ultralow concentrations of acetone vapor indicate its potential for applications in many areas.
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11
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Chen KW, Liu JP, Hsu YS, Liu CH, Pai YH, Chen CH. Controlled synthesis of Pt and Co3O4 dual-functionalized In2O3 nanoassemblies for room temperature detection of carbon monoxide. NEW J CHEM 2018. [DOI: 10.1039/c8nj03543a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Innovative Pt and Co3O4 nanostructure co-decorated In2O3 nanobundles have been successfully developed and demonstrated as high-performance room-temperature CO gas sensors.
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Affiliation(s)
- Kuan-Wei Chen
- Department of Materials Science and Engineering
- National Chiao Tung University
- Hsin-Chu
- Republic of China
| | - Jen-Pu Liu
- Department of Materials Science and Engineering
- National Chiao Tung University
- Hsin-Chu
- Republic of China
| | - Yu-Shan Hsu
- Department of Materials Science and Engineering
- National Chiao Tung University
- Hsin-Chu
- Republic of China
| | - Chao-Heng Liu
- Department of Materials Science and Engineering
- National Chiao Tung University
- Hsin-Chu
- Republic of China
| | - Ying-Hao Pai
- Department of Materials Science and Engineering
- National Chiao Tung University
- Hsin-Chu
- Republic of China
| | - Chun-Hua Chen
- Department of Materials Science and Engineering
- National Chiao Tung University
- Hsin-Chu
- Republic of China
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12
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Shanmugasundaram A, Gundimeda V, Hou T, Lee DW. Realizing Synergy between In 2O 3 Nanocubes and Nitrogen-Doped Reduced Graphene Oxide: An Excellent Nanocomposite for the Selective and Sensitive Detection of CO at Ambient Temperatures. ACS APPLIED MATERIALS & INTERFACES 2017; 9:31728-31740. [PMID: 28875705 DOI: 10.1021/acsami.7b06253] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Hierarchical mesoporous In2O3 nanocubes and nitrogen-doped reduced graphene oxide-indium oxide nanocube (InNrGO) composites were prepared for carbon monoxide (CO) sensing. The as-synthesized materials were systematically investigated by different characterization techniques such as field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, thermogravimetic analysis, X-ray photoelectron spectroscopy, micro-Raman, Fourier transform infrared spectroscopy, and photoluminesce analysis. The obtained results are consistent with each other. The CO-sensing characteristics of the In2O3 nanocubes and InNrGO composites were examined at different operating temperatures (35 °C < Ts < 300 °C) and CO concentrations (1-1000 ppm). Owing to their large surface-to-volume ratio and porosity, the In2O3 nanocubes exhibited a superior sensitivity with a detection limit of 1 ppm at 250 °C. Furthermore, to enhance the sensing characteristics and reduce the operating temperature, a composite of NrGO and In2O3 nanocubes was fabricated. The incorporation of NrGO drastically improved the sensing performance of the In2O3 nanocubes, showing an excellent sensitivity (SR ∼ 3.6-5 ppm of CO at ∼35 °C) with appreciably fast response (ΓRES ∼ 22 s) and recovery (ΓREC ∼ 32 s) times. The sensing studies supported by the structural and morphological material characteristics lead to the plausible sensing mechanism proposed.
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Affiliation(s)
- Arunkumar Shanmugasundaram
- MEMS and Nanotechnology Laboratory, School of Mechanical Systems Engineering, Chonnam National University , Gwangju-61186, Republic of Korea
| | - Veerabrahmachari Gundimeda
- Nanomaterials Laboratory, Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology , Hyderabad-500 007, Telangana, India
| | - Tianfeng Hou
- MEMS and Nanotechnology Laboratory, School of Mechanical Systems Engineering, Chonnam National University , Gwangju-61186, Republic of Korea
| | - Dong Weon Lee
- MEMS and Nanotechnology Laboratory, School of Mechanical Systems Engineering, Chonnam National University , Gwangju-61186, Republic of Korea
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13
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Bärtsch M, Niederberger M. The Role of Interfaces in Heterostructures. Chempluschem 2017; 82:42-59. [DOI: 10.1002/cplu.201600519] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 12/16/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Mario Bärtsch
- Laboratory for Multifunctional Materials; Department of Materials; ETH Zürich; Vladimir-Prelog-Weg 5 8093 Zürich Switzerland
| | - Markus Niederberger
- Laboratory for Multifunctional Materials; Department of Materials; ETH Zürich; Vladimir-Prelog-Weg 5 8093 Zürich Switzerland
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14
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Dong R, Zhang L, Zhu Z, Yang J, Gao X, Wang S. Fabrication and formaldehyde sensing performance of Fe-doped In2O3hollow microspheres via a one-pot method. CrystEngComm 2017. [DOI: 10.1039/c6ce02061e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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15
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Catalysis-Based Cataluminescent and Conductometric Gas Sensors: Sensing Nanomaterials, Mechanism, Applications and Perspectives. Catalysts 2016. [DOI: 10.3390/catal6120210] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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16
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17
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Zeng D, Gong P, Chen Y, Zhang Q, Xie Q, Peng DL. Colloidal synthesis of Cu-ZnO and Cu@CuNi-ZnO hybrid nanocrystals with controlled morphologies and multifunctional properties. NANOSCALE 2016; 8:11602-10. [PMID: 27216552 DOI: 10.1039/c6nr02055k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Metal-semiconductor hybrid nanocrystals have received extensive attention owing to their multiple functionalities which can find wide technological applications. The utilization of low-cost non-noble metals to construct novel metal-semiconductor hybrid nanocrystals is important and meaningful for their large-scale applications. In this study, a facile solution approach is developed for the synthesis of Cu-ZnO hybrid nanocrystals with well-controlled morphologies, including nanomultipods, core-shell nanoparticles, nanopyramids and core-shell nanowires. In the synthetic strategy, Cu nanocrystals formed in situ serve as seeds for the heterogeneous nucleation and growth of ZnO, and it eventually forms various Cu-ZnO hetero-nanostructures under different reaction conditions. These hybrid nanocrystals possess well-defined and stable heterostructure junctions. The ultraviolet-visible-near infrared spectra reveal morphology-dependent surface plasmon resonance absorption of Cu and the band gap absorption of ZnO. Furthermore, we construct a novel Cu@CuNi-ZnO ternary hetero-nanostructure by incorporating the magnetic metal Ni into the pre-synthesized colloidal Cu nanocrystals. Such hybrid nanocrystals possess a magnetic Cu-Ni intermediate layer between the ZnO shell and the Cu core, and exhibit ferromagnetic/superparamagnetic properties which expand their functionalities. Finally, enhanced photocatalytic activities are observed in the as-prepared non-noble metal-ZnO hybrid nanocrystals. This study not only provides an economical way to prepare high-quality morphology-controlled Cu-ZnO hybrid nanocrystals for potential applications in the fields of photocatalysis and photovoltaic devices, but also opens up new opportunities in designing ternary non-noble metal-semiconductor hybrid nanocrystals with multifunctionalities.
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Affiliation(s)
- Deqian Zeng
- Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, 361005, P.R. China.
| | - Pingyun Gong
- Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, 361005, P.R. China.
| | - Yuanzhi Chen
- Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, 361005, P.R. China.
| | - Qinfu Zhang
- Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, 361005, P.R. China.
| | - Qingshui Xie
- Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, 361005, P.R. China.
| | - Dong-Liang Peng
- Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, 361005, P.R. China.
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18
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Zhang J, Liu X, Neri G, Pinna N. Nanostructured Materials for Room-Temperature Gas Sensors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:795-831. [PMID: 26662346 DOI: 10.1002/adma.201503825] [Citation(s) in RCA: 441] [Impact Index Per Article: 55.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Indexed: 05/20/2023]
Abstract
Sensor technology has an important effect on many aspects in our society, and has gained much progress, propelled by the development of nanoscience and nanotechnology. Current research efforts are directed toward developing high-performance gas sensors with low operating temperature at low fabrication costs. A gas sensor working at room temperature is very appealing as it provides very low power consumption and does not require a heater for high-temperature operation, and hence simplifies the fabrication of sensor devices and reduces the operating cost. Nanostructured materials are at the core of the development of any room-temperature sensing platform. The most important advances with regard to fundamental research, sensing mechanisms, and application of nanostructured materials for room-temperature conductometric sensor devices are reviewed here. Particular emphasis is given to the relation between the nanostructure and sensor properties in an attempt to address structure-property correlations. Finally, some future research perspectives and new challenges that the field of room-temperature sensors will have to address are also discussed.
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Affiliation(s)
- Jun Zhang
- College of Physics, Qingdao University, Qingdao, 266071, China
- School of Materials Science and Engineering, University of Jinan, Jinan, 250022, China
| | - Xianghong Liu
- College of Physics, Qingdao University, Qingdao, 266071, China
- Institute for Integrative Nanosciences, IFW-Dresden, Helmholtzstrasse 20, 01069, Dresden, Germany
| | - Giovanni Neri
- Department of Electronic Engineering, Chemistry and Industrial Engineering, University of Messina, Contrada di Dio, 98166, Messina, Italy
| | - Nicola Pinna
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany
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19
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Chava RK, Oh SY, Yu YT. Enhanced H2gas sensing properties of Au@In2O3core–shell hybrid metal–semiconductor heteronanostructures. CrystEngComm 2016. [DOI: 10.1039/c6ce00352d] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Li L, Qin H, Zhang L, Hu J. Ultrasensitive sensing performances to sub-ppb level acetone for Pd-functionalized SmFeO3packed powder sensors. RSC Adv 2016. [DOI: 10.1039/c6ra05761f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Pd-SmFeO3is functionalized by mixing PdCl2with nanocrystalline powders and subsequently followed by an annealing at 750 °C.
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Affiliation(s)
- Ling Li
- School of Physics
- State Key Laboratory for Crystal Materials
- Shandong University
- Jinan 250100
- China
| | - Hongwei Qin
- School of Physics
- State Key Laboratory for Crystal Materials
- Shandong University
- Jinan 250100
- China
| | - Ling Zhang
- School of Resource and Environment
- University of Jinan
- Jinan 250022
- China
| | - Jifan Hu
- School of Physics
- State Key Laboratory for Crystal Materials
- Shandong University
- Jinan 250100
- China
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21
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Wang YT, Whang WT, Chen CH. Hollow V₂O₅ Nanoassemblies for High-Performance Room-Temperature Hydrogen Sensors. ACS APPLIED MATERIALS & INTERFACES 2015; 7:8480-8487. [PMID: 25839194 DOI: 10.1021/am509182s] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Nanostructured oxides with characteristic morphologies are essential building blocks for high-performance gas-sensing devices. We describe the high-yield fabrication of a series of functionalized V2O5 nanoassemblies through a facile polyol approach with specific varieties of polyvinylpyrrolidone. The synthesized V2O5 nanoassemblies consisting of tiny one-dimensional nanoblocks with the absence of any extrinsic catalysts exhibit distinct hemispherical or spherical hollow morphologies and operate as room-temperature hydrogen sensors with remarkable sensitivities and responses.
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Affiliation(s)
- Ying-Ting Wang
- Department of Materials Science and Engineering, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsin-Chu, Taiwan 30010, ROC
| | - Wha-Tzong Whang
- Department of Materials Science and Engineering, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsin-Chu, Taiwan 30010, ROC
| | - Chun-Hua Chen
- Department of Materials Science and Engineering, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsin-Chu, Taiwan 30010, ROC
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22
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Kim WJ, Min BK, Pradhan D, Sohn Y. Crystal phase transformation and doping-induced blue emission of Eu-doped InOOH and cubic/corundum-type rhombohedral In2O3nanowires. CrystEngComm 2015. [DOI: 10.1039/c4ce02111h] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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23
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Huang M, Cui Z, Yang X, Zhu S, Li Z, Liang Y. Pd-loaded In2O3 nanowire-like network synthesized using carbon nanotube templates for enhancing NO2 sensing performance. RSC Adv 2015. [DOI: 10.1039/c4ra14580a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Pd–In2O3 nanowire-like network sensor with characteristic response curve has potential application in preparing multi-functional gas sensors.
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Affiliation(s)
- Mingqi Huang
- School of Materials Science and Engineering
- Tianjin University
- Tianjin 300072
- China
| | - Zhenduo Cui
- School of Materials Science and Engineering
- Tianjin University
- Tianjin 300072
- China
| | - Xianjin Yang
- School of Materials Science and Engineering
- Tianjin University
- Tianjin 300072
- China
- Tianjin Key Laboratory of Composite and Functional Materials
| | - Shengli Zhu
- School of Materials Science and Engineering
- Tianjin University
- Tianjin 300072
- China
- Tianjin Key Laboratory of Composite and Functional Materials
| | - Zhaoyang Li
- School of Materials Science and Engineering
- Tianjin University
- Tianjin 300072
- China
- Tianjin Key Laboratory of Composite and Functional Materials
| | - Yanqin Liang
- School of Materials Science and Engineering
- Tianjin University
- Tianjin 300072
- China
- Tianjin Key Laboratory of Composite and Functional Materials
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24
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A novel electronic nose based on porous In2O3 microtubes sensor array for the discrimination of VOCs. Biosens Bioelectron 2014; 64:547-53. [PMID: 25310487 DOI: 10.1016/j.bios.2014.09.081] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 09/23/2014] [Accepted: 09/29/2014] [Indexed: 11/20/2022]
Abstract
We have innovatively developed an electronic nose consisting of only one type of semiconductor metal oxide (SMO) material. The representative SMO material, porous In2O3 microtubes in this work, offered great surface area and large gas penetration channels. By using a solvent casting process, different amounts of porous In2O3 microtubes were coated on Al2O3 substrate, forming a resistometric SMO sensor array-based electronic nose. Each sensing unit in the electronic nose exhibited independent response toward ethanol. We have successfully applied this electronic nose to distinguish four alcohols at the same concentrations (100 ppm), and also utilized the electronic nose for the discrimination of 14 volatile organic compounds (VOCs). Clear differentiation among all the 14 VOCs both at their immediately dangerous to life or health (IDLH) and the permissible exposure limit (PEL) concentrations has been achieved with no errors or misclassifications. We expect that this method will expand the application of SMO sensor array-based electronic nose which has been largely limited by the selection of commercially available SMOs and dopants.
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25
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Fratoddi I, Macagnano A, Battocchio C, Zampetti E, Venditti I, Russo MV, Bearzotti A. Platinum nanoparticles on electrospun titania nanofibers as hydrogen sensing materials working at room temperature. NANOSCALE 2014; 6:9177-9184. [PMID: 24981799 DOI: 10.1039/c4nr01400f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Platinum nanoparticles (PtNPs), with diameters of 3-10 nm, were synthesized by water phase reduction, using 3-mercapto-1-propanesulfonate (3MPS) as a hydrophilic capping agent. PtNPs were deposited by a dipcoating technique on titania nanofibers (TiO2NFs), obtained by electrospinning. The investigated properties of the Pt-TiO2 hybrid at room temperature show that this material combines the properties of photoconduction of titania and the photocatalytic activity of the hybrid. To assess the best performance of Pt-TiO2, different measurements were performed at room temperature, comparing hydrogen response under UV of the uncoated TiO2NFs, compared with the Pt-TiO2 system prepared with two different amounts of PtNPs. During the sensing tests toward hydrogen an enhancement of photoconductivity (150%), an increase in response (400%) and an overall improvement of their dynamic behaviour were observed.
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Affiliation(s)
- Ilaria Fratoddi
- Department of Chemistry, University of Rome Sapiens, P.le A. Moro 5, I-00185 Rome, Italy.
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26
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Trung DD, Hoa ND, Tong PV, Duy NV, Dao TD, Chung HV, Nagao T, Hieu NV. Effective decoration of Pd nanoparticles on the surface of SnO2 nanowires for enhancement of CO gas-sensing performance. JOURNAL OF HAZARDOUS MATERIALS 2014; 265:124-132. [PMID: 24355775 DOI: 10.1016/j.jhazmat.2013.11.054] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 10/18/2013] [Accepted: 11/24/2013] [Indexed: 06/03/2023]
Abstract
Decoration of noble metal nanoparticles (NPs) on the surface of semiconducting metal oxide nanowires (NWs) to enhance material characteristics, functionalization, and sensing abilities has attracted increasing interests from researchers worldwide. In this study, we introduce an effective method for the decoration of Pd NPs on the surface of SnO2 NWs to enhance CO gas-sensing performance. Single-crystal SnO2 NWs were fabricated by chemical vapor deposition, whereas Pd NPs were decorated on the surface of SnO2 NWs by in situ reduction of the Pd complex at room temperature without using any linker or reduction agent excepting the copolymer P123. The materials were characterized by advanced techniques, such as high-resolution transmission electron microscopy, scanning transmission electron microscopy, and energy-dispersive X-ray spectroscopy. The Pd NPs were effectively decorated on the surface of SnO2 NWs. As an example, the CO sensing characteristics of SnO2 NWs decorated with Pd NPs were investigated at different temperatures. Results revealed that the gas sensor exhibited excellent sensing performance to CO at low concentration (1-25ppm) with ultrafast response-recovery time (in seconds), high responsivity, good stability, and reproducibility.
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Affiliation(s)
- Do Dang Trung
- International Training Institute for Materials Science, Hanoi University of Science and Technology, No. 1 Dai Co Viet Road, Hanoi, Viet Nam
| | - Nguyen Duc Hoa
- International Training Institute for Materials Science, Hanoi University of Science and Technology, No. 1 Dai Co Viet Road, Hanoi, Viet Nam.
| | - Pham Van Tong
- International Training Institute for Materials Science, Hanoi University of Science and Technology, No. 1 Dai Co Viet Road, Hanoi, Viet Nam
| | - Nguyen Van Duy
- International Training Institute for Materials Science, Hanoi University of Science and Technology, No. 1 Dai Co Viet Road, Hanoi, Viet Nam
| | - T D Dao
- National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - H V Chung
- National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - T Nagao
- National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Nguyen Van Hieu
- International Training Institute for Materials Science, Hanoi University of Science and Technology, No. 1 Dai Co Viet Road, Hanoi, Viet Nam.
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27
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Li P, Fan H, Cai Y, Xu M, Long C, Li M, Lei S, Zou X. Phase transformation (cubic to rhombohedral): the effect on the NO2 sensing performance of Zn-doped flower-like In2O3 structures. RSC Adv 2014. [DOI: 10.1039/c3ra47467d] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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28
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29
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Zhou B, Sun Z, Li D, Zhang T, Deng L, Liu YN. Platinum nanostructures via self-assembly of an amyloid-like peptide: a novel electrocatalyst for the oxygen reduction. NANOSCALE 2013; 5:2669-2673. [PMID: 23463381 DOI: 10.1039/c3nr33998j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
An aniline-GGAAKLVFF peptide (AFP) was prepared by solid-phase synthesis. The peptide can readily self-assemble into fibrils. Platinum nanoparticles (Pt NPs) were directly immobilized on the surface of the AFP fibrils via electrostatic interaction. Compared to other currently available techniques for the fabrication of metal-peptide fibrils, the noncovalent functionalization strategy is able to deposit nanoparticles on peptide fibrils with different morphologies and high metal loading, which is important for applications in catalysis, electronic materials and other corresponding fields. The Pt-AFP fibrils were employed to modify the electrode, which exhibits high electrocatalytic activities towards oxygen reduction. Thus, the Pt-AFP fibrils hold great potential for polymer electrolyte fuel cells and other electrochemical applications.
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Affiliation(s)
- Binbin Zhou
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, PR China
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30
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Liu B, Cai D, Liu Y, Li H, Weng C, Zeng G, Li Q, Wang T. High-performance room-temperature hydrogen sensors based on combined effects of Pd decoration and Schottky barriers. NANOSCALE 2013; 5:2505-2510. [PMID: 23412625 DOI: 10.1039/c3nr33872j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A new hydrogen sensor was fabricated by coating a Pd-decorated In2O3 film on Au electrodes. In response to 1 vol% H2 at room temperature, an ultra high sensitivity of 4.6 × 10(7) was achieved. But after an annealing treatment in vacuum, its sensitivity degenerated by 4 orders of magnitude. In addition, the response time and recovery time were also extended from 28 s and 32 s to 242 s and 108 s, respectively. It was found from contrast experiments that Pd decoration was essential to make the sensor work at room temperature and Schottky barriers played a vital role in enhancing the sensor's performance. The methodology demonstrated in this paper shows that a combination of novel sensing materials and Schottky contact is an effective approach to design high-performance gas sensors.
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Affiliation(s)
- Bin Liu
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen, China
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31
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Li P, Cai Y, Fan H. Porous thin sheet-based α-Fe2O3-doped In2O3 structures: hydrothermal synthesis and enhanced Cl2 sensing performance. RSC Adv 2013. [DOI: 10.1039/c3ra43616k] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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32
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Cui ZM, Mechai A, Guo L, Song WG. Palladium nanoparticles on the inner wall of tin oxide hollow nanospheres with enhanced hydrogen sensing properties. RSC Adv 2013. [DOI: 10.1039/c3ra41941j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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33
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Cai Y, Fan H, Xu M, Li Q, Long C. Fast economical synthesis of Fe-doped ZnO hierarchical nanostructures and their high gas-sensing performance. CrystEngComm 2013. [DOI: 10.1039/c3ce40915e] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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