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1. A carbon modified MnO₂ nanosheet array as a stable high-capacitance supercapacitor electrode

Author:
Huang, Yu; Li, Yuanyuan; Hu, Zuoqi; Wei, Guangming; Guo, Junling; Liu, Jinping
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9809-9813
ISSN:
2050-7496
Subject:
carbon; carbonization; electrical conductivity; electrodes; electron transfer; foil; glucose; hot water treatment; manganese dioxide; nanosheets; titanium
Abstract:
... A carbon-modified manganese dioxide (MnO₂@C) nanosheet array has been synthesized on a titanium foil current collector via a facile hydrothermal method followed by carbonization of glucose pre-adsorbed onto the nanosheets. The direct growth of MnO₂@C nanosheets on a current collector leads to enhanced electron transport/collection and more sufficient ion adsorption–desorption. Carbon modification ...
DOI:
10.1039/c3ta12148h

2. A cationic microporous metal–organic framework for highly selective separation of small hydrocarbons at room temperature

Author:
Xu, Hui; Cai, Jianfeng; Xiang, Shengchang; Zhang, Zhangjing; Wu, Chuande; Rao, Xiangtang; Cui, Yuanjing; Yang, Yu; Krishna, Rajamani; Chen, Banglin; Qian, Guodong
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9916-9921
ISSN:
2050-7496
Subject:
adenine; adsorption; ambient temperature; chromatography; coordination polymers; methane; porous media; surface area
Abstract:
... A new three-dimensional cationic metal–organic framework Zn₈O(EDDA)₄(ad)₄·(HEDDA)₂·6DMF·27H₂O (ZJU-48; H₂EDDA = (E)-4,4′-(ethene-1,2-diyl)dibenzoic acid; ad = adenine) was solvothermally synthesized and structurally characterized. ZJU-48 features a three-dimensional structure with a cationic skeleton and has one-dimensional pores along the c axis of about 9.1 × 9.1 Ų. The activated ZJU-48a exhibi ...
DOI:
10.1039/c3ta12086d

3. A microchanneled ceramic membrane for highly efficient oxygen separation

Author:
Shao, Xin; Dong, Dehua; Parkinson, Gordon; Li, Chun-Zhu
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9641-9644
ISSN:
2050-7496
Subject:
ceramics; chemistry; oxygen; permeability
Abstract:
... A microchanneled ceramic membrane has been developed for oxygen separation. Numerous parallel microchannels traverse the ceramic membrane with one open end and another end terminating with a thin dense layer. Compared with conventional dense membranes, the new membrane substantially increases oxygen permeation flux by a factor of greater than 5. ...
DOI:
10.1039/c3ta11952a

4. Amine group functionalized fullerene derivatives as cathode buffer layers for high performance polymer solar cells

Author:
Zhang, Zhi-Guo; Li, Hui; Qi, Boyuan; Chi, Dan; Jin, Zhiwen; Qi, Zhe; Hou, Jianhui; Li, Yongfang; Wang, Jizheng
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9624-9629
ISSN:
2050-7496
Subject:
aluminum; calcium; cathodes; chemistry; copper; fullerene; gold; polymers; silver; solar cells
Abstract:
... An easy-accessible amine group functionalized fullerene derivative, DMAPA-C₆₀, is explored as a cathode buffer layer (CBL) in polymer solar cells (PSCs) for our presently tested three different material systems, namely P3HT:PCBM, PBDTTT-C:PC₇₀BM and PBDTTT-C-T:PC₇₀BM. The power conversion efficiencies of the three systems with DMAPA-C₆₀ as the CBL reach 3.88%, 6.29% and 7.42%, respectively, which ...
DOI:
10.1039/c3ta12478a

5. Antimony doped tin oxide modified carbon nanotubes as catalyst supports for methanol oxidation and oxygen reduction reactions

Author:
Xu, Junyuan; Aili, David; Li, Qingfeng; Pan, Chao; Christensen, Erik; Jensen, Jens Oluf; Zhang, Wei; Liu, Gaoyang; Wang, Xindong; Bjerrum, Niels J.
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9737-9745
ISSN:
2050-7496
Subject:
X-ray photoelectron spectroscopy; antimony; carbon nanotubes; catalysts; catalytic activity; composite materials; electrochemistry; fuel cells; methanol; nanoparticles; oxidation; oxygen; platinum; surface area; temperature; tin dioxide
Abstract:
... Antimony doped tin oxide (ATO) and its composites with carbon nanotubes (CNTs) were synthesized and investigated as alternative Pt catalyst supports for the oxygen reduction reaction (ORR) and the methanol oxidation reaction (MOR). The synthesized ATO nanoparticles had a BET surface area of 88 m² g⁻¹ and an electronic conductivity of 0.75 S cm⁻¹. When loaded on the CNT surface at a content of e.g. ...
DOI:
10.1039/c3ta11238a

6. A performance study of enhanced visible-light-driven photocatalysis and magnetical protein separation of multifunctional yolk–shell nanostructures

Author:
Dong, Wenjun; Zhu, Yanjun; Huang, Huandi; Jiang, Liangshu; Zhu, Huijuan; Li, Chaorong; Chen, Benyong; Shi, Zhan; Wang, Ge
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 10030-10036
ISSN:
2050-7496
Subject:
chemical composition; iron oxides; light; magnetic separation; magnetism; methylene blue; nanocrystals; nanoparticles; nickel; photocatalysis; porous media; proteins; silica; surface area; titanium dioxide
Abstract:
... Synthesis of functional yolk–shell nanostructures (YSNs) containing SiO₂ nanoparticle yolk and a mesoporous shell of NiTiO₃ is reported. SiO₂@TiO₂ core–shell spheres were first prepared via a sol–gel approach, and then a Ni(OH)₂ nanowhisker was deposited on the surface of a TiO₂ layer and SiO₂ nanoparticle-core etching took place simultaneously in a H₂O–ethanol–ammonia solution reaction, and then ...
DOI:
10.1039/c3ta12272g

7. A porous polymer–silica composite with a “vespula-like” structure for thermal insulating materials prepared via high pressure phase control

Author:
Yoda, Satoshi; Ohara, Motohiro; Takebayashi, Yoshihiro; Sue, Kiwamu; Hakuta, Yukiya; Furuya, Takeshi; Yamada, Mitsuhiko; Otake, Katsuto
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9620-9623
ISSN:
2050-7496
Subject:
aerogels; carbon dioxide; foams; insulating materials; microparticles; polymers; separation; silica; silicon
Abstract:
... A new fabrication route for polymer–silica composite foams is developed which includes (1) a homogeneous mixture of polymer, silicon alkoxide, and CO₂ under high pressure and (2) multiple phase separations of the mixture induced by a pressure drop. The method provides a unique “vespula like” porous polymer composite in which the cells include spherical silica-rich microparticles. This is an import ...
DOI:
10.1039/c3ta11772c

8. Application of long wavelength visible light (λ > 650 nm) in photocatalysis with a p-CuO–n-In₂O₃ quantum dot heterojunction photocatalyst

Author:
Yu, Linhui; Huang, Yan; Xiao, Guangcan; Li, Danzhen
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9637-9640
ISSN:
2050-7496
Subject:
cupric oxide; hot water treatment; irradiation; light; photocatalysis; photocatalysts; quantum dots; wavelengths
Abstract:
... A novel CuO quantum dot (QD) sensitized In₂O₃ heterojunction was synthesized by a hydrothermal method and a post-calcination process. The as-prepared CuO-QD–In₂O₃ maintained its photocatalytic activity even under visible light irradiation at a long wavelength beyond 650 nm, which has been observed for the first time. ...
DOI:
10.1039/c3ta12207g

9. BaNb₀.₀₅Fe₀.₉₅O₃₋δ as a new oxygen reduction electrocatalyst for intermediate temperature solid oxide fuel cells

Author:
Dong, Feifei; Chen, Yubo; Ran, Ran; Chen, Dengjie; Tadé, Moses O.; Liu, Shaomin; Shao, Zongping
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9781-9791
ISSN:
2050-7496
Subject:
X-ray diffraction; ambient temperature; catalysts; cathodes; cooling; crystal structure; desorption; dielectric spectroscopy; electrical conductivity; electrochemistry; fuel cells; oxygen; phase transition; thermal expansion; thermogravimetry; transmission electron microscopy
Abstract:
... Cobalt-free perovskite BaNb₀.₀₅Fe₀.₉₅O₃₋δ (BNF) is synthesized and characterized towards application as a cathode material for intermediate temperature solid oxide fuel cells. In situ X-ray diffraction and transmission electron microscopy are applied to study the crystal structure and thermally induced phase transformation. BNF exists as a multiphase structure composed of a monoclinic phase and a ...
DOI:
10.1039/c3ta11447c

10. Black brookite titania with high solar absorption and excellent photocatalytic performance

Author:
Zhu, Guilian; Lin, Tianquan; Lü, Xujie; Zhao, Wei; Yang, Chongyin; Wang, Zhou; Yin, Hao; Liu, Zhanqiang; Huang, Fuqiang; Lin, Jianhua
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9650-9653
ISSN:
2050-7496
Subject:
absorption; aluminum; oxygen; photocatalysis; solar energy; titanium; titanium dioxide
Abstract:
... Black platelike brookite with outstanding photocatalytic performance is prepared by constructing a distinct crystalline core/disordered shell structure (TiO₂@TiO₂₋ₓ) through aluminium reduction. Many oxygen vacancies and Ti³⁺ states are introduced into the distorted shell, which increase the solar energy absorption and boost the photocatalytic activity. ...
DOI:
10.1039/c3ta11782k

11. Broadband light confinement using a hierarchically structured TiO₂ multi-layer for dye-sensitized solar cells

Author:
Chang, Yong-June; Kong, Eui-Hyun; Park, Yoon-Cheol; Jang, Hyun Myung
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9707-9713
ISSN:
2050-7496
Subject:
nanocrystals; reflectance; solar cells; surface area; titanium dioxide; transmittance
Abstract:
... Herein, we present a simple strategy for broadband light confinement without sacrificing dye-loading capacity by suitably combining multi-layer architecture with hierarchically structured TiO₂. For this purpose, three distinct TiO₂ hierarchical nanomaterials were exploited to simultaneously realize high internal surface area and a graded series of optical properties (in terms of reflectance and tr ...
DOI:
10.1039/c3ta11527e

12. Characterization of layered silicate HUS-5 and formation of novel nanoporous silica through transformation of HUS-5 ion-exchanged with alkylammonium cations

Author:
Tsunoji, Nao; Fukuda, Miki; Yoshida, Kaname; Sasaki, Yukichi; Ikeda, Takuji; Ide, Yusuke; Sadakane, Masahiro; Sano, Tsuneji
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9680-9688
ISSN:
2050-7496
Subject:
acetic acid; acid treatment; adsorption; catalysts; catalytic activity; cations; condensation reactions; crystal structure; micropores; nanopores; quaternary ammonium compounds; silica; silicates; sodium; surface area; transmission electron microscopy
Abstract:
... Hiroshima University Silicate-1 (HUS-1) and its precursor (HUS-5), whose crystal structure was similar to that of β-HLS layered silicate, were prepared. The interlayer distance of HUS-5 was 0.4 nm; both Na⁺ cations and hydrated water were present in the interlayer. The interlayer distance of HUS-5 was expanded by ion-exchanging with several bulky organic cations such as dodecyltrimethylammonium, h ...
DOI:
10.1039/c3ta11971h

13. Characterizations of in situ grown ceria nanoparticles on reduced graphene oxide as a catalyst for the electrooxidation of hydrazine

Author:
Srivastava, Manish; Das, Ashok Kumar; Khanra, Partha; Uddin, Md. Elias; Kim, Nam Hoon; Lee, Joong Hee
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9792-9801
ISSN:
2050-7496
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; catalysts; catalytic activity; ceric oxide; cerium; cetyltrimethylammonium bromide; electrochemistry; graphene oxide; hot water treatment; hydrazine; nanocomposites; nanoparticles; nitrates; scanning electron microscopy; synergism; transmission electron microscopy; ultraviolet-visible spectroscopy
Abstract:
... Ceria (CeO₂) nanoparticles were grown on reduced graphene oxide (RGO) via the in situ reduction of graphene oxide (GO) in the presence of cerium nitrate and CTAB, followed by a one step hydrothermal treatment. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible spectroscopy (UV-Vis), Raman spectroscopy (RS), field emission scanning electron microscopy (FE- ...
DOI:
10.1039/c3ta11311f

14. Cobalt doped LaSrTiO₃₋δ as an anode catalyst: effect of Co nanoparticle precipitation on SOFCs operating on H₂S-containing hydrogen

Author:
Cui, Shao-Hua; Li, Jian-Hui; Zhou, Xin-Wen; Wang, Guang-Ya; Luo, Jing-Li; Chuang, Karl T.; Bai, Yang; Qiao, Li-Jie
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9689-9696
ISSN:
2050-7496
Subject:
anodes; catalysts; catalytic activity; cobalt; electrochemistry; electrolytes; fuel cells; fuels; hydrogen; lanthanum; nanoparticles; oxidative stability; particle size; strontium; temperature
Abstract:
... This article compares the effects of Co doping on phase structures and stability of lanthanum strontium titanate (LST) anodes and electrochemical measurements in solid oxide fuel cells (SOFCs) employing H₂S-containing H₂ as fuel. The Co-doped LST (LSCT) with a perovskite structure was synthesized via a solid state approach, achieving excellent phase purity and refined particle size. The catalytic ...
DOI:
10.1039/c3ta11315a

15. Combinatorial deposition of a dense nano-thin film YSZ electrolyte for low temperature solid oxide fuel cells

Author:
Ha, Seungbum; Su, Pei-Chen; Cha, Suk-Won
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9645-9649
ISSN:
2050-7496
Subject:
air; aluminum oxide; anodes; ceramics; electric potential difference; electrolytes; films (materials); fuel cells; hydrogen; nanopores; temperature; thermal stability
Abstract:
... This paper presents a combinatorial deposition of a nano-thin film yttria-stabilized zirconia (YSZ) electrolyte deposited on a nanoporous anodic aluminum oxide (AAO) membrane, which serves as a supporting and gas-permeable substrate. The dense YSZ electrolyte was deposited by combining atomic layer deposition (ALD) and sputtering in an attempt to realize a pinhole-free electrolyte on a porous stru ...
DOI:
10.1039/c3ta11758h

16. Controlled synthesis of mesoporous anatase TiO₂ microspheres as a scattering layer to enhance the photoelectrical conversion efficiency

Author:
Miao, Xiaohuan; Pan, Kai; Liao, Yongping; Zhou, Wei; Pan, Qingjiang; Tian, Guohui; Wang, Guofeng
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9853-9861
ISSN:
2050-7496
Subject:
X-ray diffraction; crystal structure; dielectric spectroscopy; electric current; electron microscopy; light scattering; microparticles; nanoparticles; porous media; solar cells; solvents; surface area; titanium dioxide
Abstract:
... TiO₂ microspheres with a large surface area, high crystallinity, uniform nanostructure and good light scattering properties were synthesized in an acetone–phenol mixed solvent via a simple solvothermal process. X-ray diffraction patterns and electron microscopy images indicated that the prepared TiO₂ microspheres had a highly mesoporous structure and were composed of highly crystalline anatase nan ...
DOI:
10.1039/c3ta11625e

17. Cu–Bi–Se-based pavonite homologue: a promising thermoelectric material with low lattice thermal conductivity

Author:
Cho, Jung Young; Mun, Hyeona; Ryu, Byungki; Kim, Sang Il; Hwang, Sungwoo; Roh, Jong Wook; Yang, Dae Jin; Shin, Weon Ho; Lee, Sang Mock; Choi, Soon-Mok; Kang, Dae Joon; Kim, Sung Wng; Lee, Kyu Hyoung
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9768-9774
ISSN:
2050-7496
Subject:
ambient temperature; bismuth; copper; power generation; thermal conductivity
Abstract:
... Pavonite homologues, Cuₓ₊yBi₅₋ySe₈ (1.2 ≤ x ≤ 1.5, 0.1 ≤ y ≤ 0.4), in a polycrystalline bulk form have been synthesized using a conventional solid state sintering technique. Their thermal and electronic transport properties were evaluated for mid-temperature thermoelectric power generation applications. Structural complexity, based on unique substitutional and interstitial Cu atoms in the structur ...
DOI:
10.1039/c3ta11457k

18. D–π–A structured porphyrins for efficient dye-sensitized solar cells

Author:
Lu, Jianfeng; Xu, Xiaobao; Cao, Kun; Cui, Jin; Zhang, Yibo; Shen, Yan; Shi, Xiaobo; Liao, Liangsheng; Cheng, Yibing; Wang, Mingkui
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 10008-10015
ISSN:
2050-7496
Subject:
carboxylic acids; dyes; electrochemistry; porphyrins; solar cells; thiophene; zinc
Abstract:
... In this study, new push–pull alkoxy-wrapped zinc porphyrin dyes with intramolecular donor–π–acceptor structures have been designed and synthesized for dye-sensitized solar cells (DSCs). The linkers based on thiophene or 2,3-dihydrothieno[3,4-b][1,4] dioxine with cyanoacetic acid can broaden the spectral response of porphyrins into the near-IR region (∼850 nm), which is mainly attributed to the cya ...
DOI:
10.1039/c3ta11870c

19. Design and synthesis of a fluoro-silane amine monomer for novel thin film composite membranes to dehydrate ethanol via pervaporation

Author:
Zuo, Jian; Chung, Tai-Shung
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9814-9826
ISSN:
2050-7496
Subject:
Fourier transform infrared spectroscopy; chemical structure; ethanol; films (materials); nuclear magnetic resonance spectroscopy; pervaporation; polyamides; polymerization; silane; thin film composite membranes
Abstract:
... A novel hybrid organic–inorganic amine monomer has been designed and synthesized to prepare thin film composite (TFC) membranes for ethanol dehydration via pervaporation. Different from the conventional amine monomer, m-phenylenediamine (MPD), used for interfacial polymerization, the new monomer was molecularly designed to sandwich an inorganic component nonafluorohexylmethyldichloro silane (ClSi) ...
DOI:
10.1039/c3ta11728f

20. Designed synthesis of hematite-based nanosorbents for dye removal

Author:
Wu, Junshu; Wang, Jinshu; Li, Hongyi; Du, Yucheng; Huang, Kelin; Liu, Baixiong
Source:
Journal of materials chemistry A 2013 v.1 no.34 pp. 9837-9847
ISSN:
2050-7496
Subject:
adsorption; ambient temperature; aqueous solutions; dyes; hematite; iron; nanowires; nitrates; organic wastes; sodium dodecylbenzenesulfonate; sorption isotherms; wastewater; water purification
Abstract:
... We report the design and synthesis of two hematite (α-Fe₂O₃)-based nanomaterials based on effective hydrothermal conversion of chemically metastable K₁.₃₃Mn₈O₁₆ nanowires (KWs) in Fe(NO₃)₃ aqueous solution. Insights are gained into the functions of sodium dodecyl benzene sulfonate (SDBS) and the mechanisms for generating large quantities of α-Fe₂O₃ hollow structures (FHSs) and K₁.₃₃Mn₈O₁₆@α-Fe₂O₃ ...
DOI:
10.1039/c3ta11520h