1
|
Akinnawo CA, Bingwa N, Meijboom R. Metal-doped mesoporous ZrO 2 catalyzed chemoselective synthesis of allylic alcohols from Meerwein–Ponndorf–Verley reduction of α,β-unsaturated aldehydes. NEW J CHEM 2021. [DOI: 10.1039/d1nj00936b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The activity of the Cr_ZrO2 catalyst is attributed to the Cr–Zr electronic interaction, which resulted in the enhanced surface acidity on ZrO2.
Collapse
Affiliation(s)
- Christianah Aarinola Akinnawo
- Research Centre for Synthesis and Catalysis
- Department of Chemical Sciences
- University of Johannesburg
- Johannesburg 2006
- South Africa
| | - Ndzondelelo Bingwa
- Research Centre for Synthesis and Catalysis
- Department of Chemical Sciences
- University of Johannesburg
- Johannesburg 2006
- South Africa
| | - Reinout Meijboom
- Research Centre for Synthesis and Catalysis
- Department of Chemical Sciences
- University of Johannesburg
- Johannesburg 2006
- South Africa
| |
Collapse
|
2
|
Duan T, Xiao Y, Zhang G, Hou B, Jia L, Li D. Effect of crystalline phases and acid sites on the dehydration of 1-octadecanol to 1-octadecene over TiO2–ZrO2 mixed oxides. J CHEM SCI 2020. [DOI: 10.1007/s12039-020-01848-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
3
|
An M, Li L, Cao Y, Ma F, Liu D, Gu F. Coral reef-like Pt/TiO2-ZrO2 porous composites for enhanced photocatalytic hydrogen production performance. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.110482] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
4
|
Reddy CV, Reddy IN, Reddy KR, Jaesool S, Yoo K. Template-free synthesis of tetragonal Co-doped ZrO2 nanoparticles for applications in electrochemical energy storage and water treatment. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.06.010] [Citation(s) in RCA: 119] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
5
|
Fujiwara K, Tada S, Honma T, Sasaki H, Nishijima M, Kikuchi R. Influences of particle size and crystallinity of highly loaded CuO/ZrO
2
on CO
2
hydrogenation to methanol. AIChE J 2019. [DOI: 10.1002/aic.16717] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Kakeru Fujiwara
- Department of Chemistry and Chemical EngineeringYamagata University Yonezawa Yamagata Japan
| | - Shohei Tada
- Department of Chemical System Engineering, Graduate School of EngineeringThe University of Tokyo Tokyo Japan
| | - Tetsuo Honma
- Japan Synchrotron Radiation Research Institute Sayo‐cho Hyogo Japan
| | - Hiro Sasaki
- Department of Chemistry and Chemical EngineeringYamagata University Yonezawa Yamagata Japan
| | | | - Ryuji Kikuchi
- Department of Chemical System Engineering, Graduate School of EngineeringThe University of Tokyo Tokyo Japan
| |
Collapse
|
6
|
Impact of Zr precursor on the electrochemical properties of V2O5 sol-gel films. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.03.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
7
|
Riyanto, Sahroni I, Bindumadhavan K, Chang PY, Doong RA. Boron Doped Graphene Quantum Structure and MoS 2 Nanohybrid as Anode Materials for Highly Reversible Lithium Storage. Front Chem 2019; 7:116. [PMID: 30931296 PMCID: PMC6425007 DOI: 10.3389/fchem.2019.00116] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Accepted: 02/14/2019] [Indexed: 11/13/2022] Open
Abstract
Herein, the boron-doped graphene quantum structure (BGQS), which contains both the advantages of 0-D graphene quantum dot and 2-D reduced graphene oxide, has been fabricated by top-down hydrothermal method and then mixed with molybdenum sulfide (MoS2) to serve as an active electrode material for the enhanced electrochemical performance of lithium ion battery. Results show that 30 wt% of BGQS/MoS2 nanohybrid delivers the superior electrochemical performance in comparison with other BGQS/MoS2 and bare components. A highly reversible capacity of 3,055 mAh g-1 at a current density of 50 mA g-1 is achieved for the initial discharge and a high reversible capacity of 1,041 mAh g-1 is obtained at 100 mA g-1 after 50 cycles. The improved electrochemical performance in BGQS/MoS2 nanohybrid is attributed to the well exfoliated MoS2 structures and the presence of BGQS, which can provide the vitally nano-dimensional contact for the enhanced electrochemical performance. Results obtained in this study clearly demonstrate that BGQS/MoS2 is a promising material for lithium ion battery and can open a pathway to fabricate novel 2-D nanosheeted nanocomposites for highly reversible Li storage application.
Collapse
Affiliation(s)
- Riyanto
- Department of Chemistry, Faculty of Mathematics and Natural Science, Islamic University of Indonesia, Yogyakarta, Indonesia
| | - Imam Sahroni
- Department of Chemistry, Faculty of Mathematics and Natural Science, Islamic University of Indonesia, Yogyakarta, Indonesia
| | - Kartick Bindumadhavan
- Institute of Environmental Engineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Pei-Yi Chang
- Institute of Environmental Engineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Ruey-an Doong
- Institute of Environmental Engineering, National Chiao Tung University, Hsinchu, Taiwan
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu, Taiwan
| |
Collapse
|
8
|
Mao Y, Bai J, Zhang M, Zhao H, Sun G, Pan X, Zhang Z, Zhou J, Xie E. Interface/defect-tuneable macro and micro photoluminescence behaviours of trivalent europium ions in electrospun ZrO 2/ZnO porous nanobelts. Phys Chem Chem Phys 2017; 19:9223-9231. [PMID: 28319219 DOI: 10.1039/c7cp01101f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
It was demonstrated that suitable interfaces between two materials can enhance the separation of photogenerated carriers. In this study, ZrO2/ZnO interfaces with type I structure were designed and prepared by the electrospinning technique. The obtained ZrO2/ZnO:Eu3+ (ZZOE) composites are highly porous in the form of nanobelts with width of 600-700 nm, comprising ZnO and ZrO2 nanocrystals, and the Eu doping can hinder the t-m phase transition of ZrO2. By tuning the annealing temperature, the inner stress and defects can be well controlled to improve the photoluminescence (PL) of the ZZOE porous nanobelts. Macro- and micro-PL spectra indicated that the body oxygen vacancies benefit the PL from Eu3+ ions, whereas the surficial ones do not. The optimal parameters for the preparation of ZZOE porous nanobelts were also investigated. Finally, a charge transfer mechanism was proposed to illuminate the PLs from the ZZOE porous nanobelts.
Collapse
Affiliation(s)
- Yanzhe Mao
- School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China.
| | - Jinglong Bai
- School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China.
| | - Mingxiang Zhang
- School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China.
| | - Hao Zhao
- School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China.
| | - Gengzhi Sun
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China
| | - Xiaojun Pan
- School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China.
| | - Zhenxing Zhang
- School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China.
| | - Jinyuan Zhou
- School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China.
| | - Erqing Xie
- School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China.
| |
Collapse
|
9
|
Sudrajat H, Babel S, Sakai H, Takizawa S. Rapid enhanced photocatalytic degradation of dyes using novel N-doped ZrO2. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2016; 165:224-234. [PMID: 26439860 DOI: 10.1016/j.jenvman.2015.09.036] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Revised: 09/21/2015] [Accepted: 09/25/2015] [Indexed: 05/11/2023]
Abstract
A novel N-doped ZrO2 (N-ZrO2) photocatalyst is synthesized through thermal decomposition of zirconium hydroxide-urea complex and is characterized using various techniques, including XRD, FTIR, TGA, SEM, TEM, UV-DRS, XPS, XANES, and BET. The N-ZrO2 possesses pure monoclinic structure with high crystallinity. By using the proposed facile route of synthesis, both interstitial and substitutional N doping with high dopant stability can be realized. The optical properties of the catalyst are significantly altered after N doping, giving an optical response in the visible and near infrared regions and an additional strong absorption peak in the UVA region. The N-ZrO2 showed a higher photocatalytic activity than pristine ZrO2 for the degradation of amaranth (AM) and methylene blue (MB) under visible or UV light irradiation, which could be attributed to the band gap narrowing, higher specific area, smaller crystalline size, and higher availability of surface hydroxyl groups. Due to its molecular structure and light absorption characteristics, MB is easier to degrade than AM. Overall removal efficiencies, including adsorption and photolysis, for AM and MB by N-ZrO2 at pH 7 with initial dye concentration of 10 mg/L, catalyst concentration of 1 g/L, and visible light irradiation of 144.7 W/m(2) are 67.2 and 96%, respectively. Using UVA light of only 3.5 W/m(2) under identical experimental conditions, complete removal of MB and AM is obtained. The photocatalytically treated solution of either AM or MB is nontoxic against Bacillus cereus, an agriculturally important soil microorganism.
Collapse
Affiliation(s)
- Hanggara Sudrajat
- School of Biochemical Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, P. O. Box 22, Pathum Thani 12121, Thailand
| | - Sandhya Babel
- School of Biochemical Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, P. O. Box 22, Pathum Thani 12121, Thailand.
| | - Hiroshi Sakai
- Department of Urban Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Satoshi Takizawa
- Department of Urban Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| |
Collapse
|
10
|
Herrera G, Montoya N, Doménech-Carbó A, Alarcón J. Synthesis, characterization and electrochemical properties of iron-zirconia solid solution nanoparticles prepared using a sol-gel technique. Phys Chem Chem Phys 2014; 15:19312-21. [PMID: 24121534 DOI: 10.1039/c3cp53216j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The range of compositions and temperatures at which single-phase tetragonal and monoclinic Fe-containing zirconia nanoparticles are stable is reported. Both types of iron-doped zirconia particles were synthesized by annealing dried gels FexZr1-xO2, with nominal compositions in the range 0 ≤ x ≤ 0.15, over the range of temperatures between 400 °C and 1300 °C. Monophasic crystalline specimens of Fe-ZrO2 solid solutions were characterized by different techniques including X-ray powder diffraction (XRD), infrared and Raman spectroscopies (IR and Raman), and transmission electron microscopy (TEM). Energy gaps were estimated from diffuse reflectance ultraviolet-visible spectra (DRUV-Vis) and compared with those obtained from electrochemical data. Upon increasing the amount of iron in both types of iron-containing zirconia-based structures the energy gaps slightly lowered. The electrochemical properties of those solid solutions obtained using the voltammetry of microparticles (VPM) technique indicated the presence of a small portion of iron as Fe(2+) in both types of crystalline Fe-doped ZrO2. Electrochemical data suggest that the monoclinic solid solutions provide a particularly high accessibility for promoting catalytic processes such as electrochemical oxygen reduction.
Collapse
Affiliation(s)
- G Herrera
- Department of Inorganic Chemistry, C/Doctor Moliner 50, 46100 Burjasot, Valencia, Spain.
| | | | | | | |
Collapse
|
11
|
Korake P, Kadam A, Garadkar K. Photocatalytic activity of Eu3+-doped ZnO nanorods synthesized via microwave assisted technique. J RARE EARTH 2014. [DOI: 10.1016/s1002-0721(14)60072-7] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
12
|
Villa-Sánchez G, Mendoza-Anaya D, Mondragón-Galicia G, Pérez-Hernández R, Olea-Mejía O, González-Martínez P. Thermoluminescence response induced by UV radiation in Eu-doped zirconia nanopowders. Radiat Phys Chem Oxf Engl 1993 2014. [DOI: 10.1016/j.radphyschem.2013.11.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
13
|
Bethge O, Nobile M, Abermann S, Glaser M, Bertagnolli E. ALD grown bilayer junction of ZnO:Al and tunnel oxide barrier for SIS solar cell. SOLAR ENERGY MATERIALS AND SOLAR CELLS : AN INTERNATIONAL JOURNAL DEVOTED TO PHOTOVOLTAIC, PHOTOTHERMAL, AND PHOTOCHEMICAL SOLAR ENERGY CONVERSION 2013; 117:178-182. [PMID: 26877596 PMCID: PMC4710496 DOI: 10.1016/j.solmat.2013.04.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 02/17/2013] [Accepted: 04/26/2013] [Indexed: 06/05/2023]
Abstract
Various metal oxides are probed as extrinsic thin tunnel barriers in Semiconductor Insulator Semiconductor solar cells. Namely Al2O3, ZrO2, Y2O3, and La2O3 thin films are in between n-type ZnO:Al (AZO) and p-type Si substrates by means of Atomic Layer Deposition. Low reverse dark current-density as low as 3×10-7 A/cm2, a fill factor up to 71.3%, and open-circuit voltage as high as 527 mV are obtained, achieving conversion efficiency of 8% for the rare earth oxide La2O3. ZrO2 and notably Al2O3 show drawbacks in performance suggesting an adverse reactivity with AZO as also indicated by X-ray Photoelectron Spectroscopy.
Collapse
Affiliation(s)
- O. Bethge
- Institute for Solid State Electronics, Vienna University of Technology, Floragasse 7, 1040 Vienna, Austria
| | - M. Nobile
- Institute for Solid State Electronics, Vienna University of Technology, Floragasse 7, 1040 Vienna, Austria
| | - S. Abermann
- Austrian Institute of Technology, Energy Department, Giefinggasse 2, 1210 Vienna, Austria
| | - M. Glaser
- Institute for Solid State Electronics, Vienna University of Technology, Floragasse 7, 1040 Vienna, Austria
| | - E. Bertagnolli
- Institute for Solid State Electronics, Vienna University of Technology, Floragasse 7, 1040 Vienna, Austria
| |
Collapse
|
14
|
Park HH, Zhang X, Lee SW, Kim KD, Choi DG, Choi JH, Lee J, Lee ES, Park HH, Hill RH, Jeong JH. Facile nanopatterning of zirconium dioxide films via direct ultraviolet-assisted nanoimprint lithography. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm01403f] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
15
|
LI K, MARTIN D, TANG J. Conversion of Solar Energy to Fuels by Inorganic Heterogeneous Systems. CHINESE JOURNAL OF CATALYSIS 2011. [DOI: 10.1016/s1872-2067(10)60209-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
16
|
Zhou H, Fan T, Zhang D. An Insight into Artificial Leaves for Sustainable Energy Inspired by Natural Photosynthesis. ChemCatChem 2010. [DOI: 10.1002/cctc.201000266] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|