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1. Preparation of thermo-chromic coating and establishment of variable temperature model | |||
Huang Houqiang,He Deliang,Lei Huibin,Hu Jun,Lu Yao | |||
Chemistry 22 May 2018 | |||
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Abstract: 6 reversible thermo-chromic coatings were prepared between thermo-chromic microcapsule and resin such as acrylic resin, silicone resin, respectively. The thermochromic performance and color coordinates (RGB) of the obtained thermochromic coating were evaluated. And models for displaying the relationship between temperatures and coating color coordinates were established using own experiment. Results showed that the correlation coefficient of each temperature model was above 0.9. The temperature measurement errors were about ±1 C after simulated trials of the model, which proved that the feasibility of measure temperature by using the variable temperature model. Also, a contactless method for obtaining specific temperature by thermochromic coating is proposed. | |||
TO cite this article:Huang Houqiang,He Deliang,Lei Huibin, et al. Preparation of thermo-chromic coating and establishment of variable temperature model[OL].[22 May 2018] http://en.paper.edu.cn/en_releasepaper/content/4745170 |
2. Porous N-Doped Carbon Prepared From Triazine-Based Polypyrrole Network: An Highly Efficient Metal-Free Catalyst for Oxygen Reduction Reaction in Alkaline Media | |||
YANG Mei,LIU Yijiang,LIU Bei,YANG Duanguang,CHEN Hongbiao,LI Huaming | |||
Chemistry 04 August 2016 | |||
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Abstract:Metal-free N-doped carbon (NC) materials have been considered as one of the most promising catalysts for the oxygen reduction reaction (ORR) in alkaline media owing to their high ORR catalytic activity, long-term stability, and excellent methanol tolerance. So far only a few examples of such catalysts have been prepared from triazine-based polymeric networks. Herein, we report the synthesis of such NC catalyst by directly pyrolyzing a nitrogen-rich, triazine-based polypyrrole network (TPN). The TPN is fabricated by oxidative polymerization of 2,4,6-tripyrrol-1,3,5-triazine monomer in the presence of TfOH using benzoyl peroxide as the oxidizing agent. Compared to commercial Pt/C catalyst, the as-prepared NC-900 (pyrolyzed at 900 C) catalyst exhibits superior ORR activity in alkaline electrolytes with a high onset potential of 0.972 V (vs. RHE), a large kinetic-limiting current density of 15.83 mA cm?2, and excellent methanol tolerance and durability. The results obtained are significant for the development of novel NC catalysts for alkaline fuel cells. | |||
TO cite this article:YANG Mei,LIU Yijiang,LIU Bei, et al. Porous N-Doped Carbon Prepared From Triazine-Based Polypyrrole Network: An Highly Efficient Metal-Free Catalyst for Oxygen Reduction Reaction in Alkaline Media[OL].[ 4 August 2016] http://en.paper.edu.cn/en_releasepaper/content/4700837 |
3. Highly Effective La Modified Ni Catalysts Derived from NiAl-LDHs for Anthraquinone Hydrogenation | |||
GUAN Chaoyang,HONG Runrun,ZHANG Na,FENG Junting,YIN Min,LI Dianqing | |||
Chemistry 27 April 2016 | |||
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Abstract:A series of Ni/Al2O3 catalysts were prepared using NiAl-CO3-layered double hydroxides (NiAl-LDHs) with different Ni/Al molar ratio (2:1~4:1) as precursors and studied in the hydrogenation of anthraquinone. The catalytic results show that Ni/Al2O3-2:1 catalyst exhibits highest hydrogenation activity due to the highest surface area. Moreover, different amount of lanthanum modified Ni/Al2O3-2:1 catalysts show higher hydrogenation activity. When the La loading reaches 2 %, the hydrogenation activity increases by 20.7 % and shows preferable selectivity compared with Ni/Al2O3-2:1 catalyst. Superior hydrogenation activity can be ascribed to the smaller Ni particle size and higher Ni dispersion. Preferable selectivity can be ascribed to the electronic effect of lanthanum, resulting in electron-rich Ni and weakening the adsorption of anthraquinone hydrogenation products. In addition, a new type of pores is generated during the calcination process, which is advantageous for the generated anthraquinone molecules to spread out to prevent overhydrogenation. | |||
TO cite this article:GUAN Chaoyang,HONG Runrun,ZHANG Na, et al. Highly Effective La Modified Ni Catalysts Derived from NiAl-LDHs for Anthraquinone Hydrogenation[OL].[27 April 2016] http://en.paper.edu.cn/en_releasepaper/content/4685749 |
4. Acid-switching of the Triplet Excited State of Rhodamine/Iodo-sryryl-BODIPY Dyad Based on the FRET Effect | |||
XU Kejing,ZHAO Jianzhang | |||
Chemistry 21 July 2015 | |||
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Abstract:A acid-controlable triplet photosensetizer (BR-1) enhanced with the fluorescence resonance energy transfer (FRET) effect was prepared. Rhodamine was used as an intramolecular energy donor as well as acid-controlable unit, and iodo-styryl-Bodipy was used as an intramolecular energy acceptor/spin converter. The intramolecular energy transfer from open-formed Rhodamine unit to iodo-styryl-Bodipy unit was studied upon the addition of acid (trifluoroacetic acid, TFA) at different time. The fluorescence quenching and excitation spectra indicated that the FRET efficiency is significantly enhanced from 0.0% to 56.1%. Our results are useful to design the triplet photosensitizers with controlable triplet state property . | |||
TO cite this article:XU Kejing,ZHAO Jianzhang. Acid-switching of the Triplet Excited State of Rhodamine/Iodo-sryryl-BODIPY Dyad Based on the FRET Effect[OL].[21 July 2015] http://en.paper.edu.cn/en_releasepaper/content/4650729 |
5. Study on preparation and performance of MgAl-WO4-LDHs/EVA composites | |||
CHEN Chunxia,ZHAO Hanqing | |||
Chemistry 12 December 2013 | |||
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Abstract:The controllable nano-Mg3Al-WO4-LDHs particles with the particle size of 10-90 nm could be swiftly prepared by reconstruction method of the calcined Mg3Al-CO3-LDHs product under microwave irradiation. The thus synthesized sample was applied to ethylene vinyl acetate (EVA) copolymer, the ?ame retardancy and thermal degradation properties of LDHs/EVA composites were studied in detail by the techniques of limiting oxygen index (LOI), UL-94 vertical burning and thermogravimetric analysis (TGA). The results show the best LOI value can be increased up to 34% and achieve UV-94V1 when the content of the nano-LDHs in LDHs/EVA composite is 70%. TGA also shows that the thermal stability of the composite is increasing with the LDHs content increasing. LDHs can decrease initial temperature of thermal degradation, and promote char formation of the composite, moreover, the residue mass is increasing with the LDHs content increasing. It is suggested that LDHs can catalyze esteri?cation, dehydration and char formation of EVA. | |||
TO cite this article:CHEN Chunxia,ZHAO Hanqing. Study on preparation and performance of MgAl-WO4-LDHs/EVA composites[OL].[12 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4574765 |
6. Efficient degradation of methylene blue by Fe3O4/chitosan/TiO2 nanocomposites | |||
He Yu,Song Gongwu | |||
Chemistry 07 November 2013 | |||
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Abstract:In this work, a facile and low-cost method for fabrication of the Fe3O4/chitosan/TiO2 nanocomposites with good adsorptive, photocatalytic, regenerated and magnetic properties was demonstrated. The synthesized nanocomposites had potential applications for the adsorption and degradation of organic pollutants in wastewater. Under the optimal condition, degradation rate of the methyl blue by the Fe3O4/chitosan/TiO2 nanocomposites was 93%. The renewable photocatalytic activity of the nanocomposites was also investigated. After multi-run experiments, the reused Fe3O4/chitosan/TiO2 nanocomposites still kept high photocatalytic performance. Thus, Fe3O4/chitosan/TiO2 nanocomposites could serve as convenient, effective, and recyclable photocatalysts. | |||
TO cite this article:He Yu,Song Gongwu. Efficient degradation of methylene blue by Fe3O4/chitosan/TiO2 nanocomposites[OL].[ 7 November 2013] http://en.paper.edu.cn/en_releasepaper/content/4566673 |
7. Visual Detection of rpoB Mutations in Rifampin-Resistant Mycobacterium tuberculosis Strains by Use of an Asymmetrically Split Peroxidase DNAzyme | |||
Deng Minggang,Feng Shuo,Luo Fengling,Sun Xiaoming,Wang Shaoru,Zhou Xiang,ZHANG Xiao-Lian | |||
Chemistry 03 April 2013 | |||
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Abstract:Multidrug-resistant Mycobacterium tuberculosisis resistant to two first-line antituberculosis drugs, isoniazid and rifampin, resulting in the relapse of tuberculosis. M. tuberculosisgrows very slowly, and thus traditional examination methods take time to test its drug resistance and cannot meet clinical needs. The use of a DNA probe makes it possible to test rifampin resistance. Wedeveloped an asymmetrical split-assembly DNA peroxidase assay to detect drug-resistant mutation of rifampin-resistant M. tuberculosisin the rpoBgene rapidly and visibly. A new strategy was also designed to eliminate the adverse effects caused by the complicated secondary structure of the target DNA and to improve the efficiency of the probes. This detection system consists of five group detections, covers rifampin-resistant determination region of therpoBgene, and tests 40 kinds of mutations, including the most common mutations at codons 531 and 526. Every group detection or individual mutant allele detection can distinguish corresponding mutant DNA sequences from the wild-type DNA sequences. | |||
TO cite this article:Deng Minggang,Feng Shuo,Luo Fengling, et al. Visual Detection of rpoB Mutations in Rifampin-Resistant Mycobacterium tuberculosis Strains by Use of an Asymmetrically Split Peroxidase DNAzyme[OL].[ 3 April 2013] http://en.paper.edu.cn/en_releasepaper/content/4531343 |
8. Bio-based chemicals: a sustainable candidate for new generation of green solvents | |||
Gu Yanlong | |||
Chemistry 09 January 2013 | |||
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Abstract:Biomass has exhibited great potential to replace fossil resources for the production of chemicals and fuels. The search for alternative reaction media to replace petroleum-based, volatile and often toxic solvents commonly used in chemical processes is an important objective of significant environmental consequence. Recently, bio-based compounds have been either used entirely as green solvents or utilized as pivotal ingredients for constructing innovative solvents, providing a new generation of green solvents, which are inexpensive, less toxic and bio-compatible. This review presents background and classification of these new media and highlights recent advances in their use in various areas including organic synthesis, biotransformations and separations. | |||
TO cite this article:Gu Yanlong . Bio-based chemicals: a sustainable candidate for new generation of green solvents[OL].[ 9 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4513564 |
9. A Simple Solid-State Reaction Route to Chromium Nitride Nanocrystalline | |||
HUO Junhao,SHI Chong,CAI Peijun | |||
Chemistry 21 December 2012 | |||
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Abstract:Chromium nitride nanocrystalline were successfully synthesized at 550 oC through a new solid-state reaction route. The synthesis was carried out in an autoclave by using Cr and NaNH2 as the reactants. Characterized by XRD, TEM and SAED, the composition and morphology of the products were confirmed. This work contributes an effective and facile method for preparing the refractory metal nitride. | |||
TO cite this article:HUO Junhao,SHI Chong,CAI Peijun. A Simple Solid-State Reaction Route to Chromium Nitride Nanocrystalline[OL].[21 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4504074 |
10. vanadia funtionalized mesoporous silicates (VMS) and their oxidation activity on aromatic compounds | |||
Fan Hongjie,Ma Peipei,Ren Tiezhen | |||
Chemistry 05 November 2012 | |||
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Abstract:Vanadium-based catalytic mesoporous silicates are the good candidates as the redox catalysts, which are used for degradation of volatile organic compounds and combustion of waste organic pollutants. Vanadium modified mesoporous silicates (VMS) was prepared by in-situ method with the assistant of surfactants Brij 56. The properties of VMS were characterized with SEM, N2-sorption isotherm and UV-vis, their activation was studied on the oxidation of phenol, styrene, anisole and toluene. Those catalysts showed a relative low activity for the conversion of phenol and high activity for toluene. The highest conversion of toluene can be achieved with the catalyst Y05. | |||
TO cite this article:Fan Hongjie,Ma Peipei,Ren Tiezhen. vanadia funtionalized mesoporous silicates (VMS) and their oxidation activity on aromatic compounds[OL].[ 5 November 2012] http://en.paper.edu.cn/en_releasepaper/content/4492916 |
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