CATALYSIS LETTERS
·
2018
·Vol. 149
·期 1
·180-189
·
IF 2.911
Hu Yin,Chen Wei,Ba Mingwei,Song Weiguo
Solvent-free selective hydrogenation of α -pinene to synthesize cis -pinane with high efficiency has always been a challenge in the catalytic research. The key to achieve this goal is the development of the highly efficient and recyclable catalysts. Cubic NaNbO 3 crystals were functionalized by (γ-aminopropyl)-triethoxysilane (APTS) and decorated with Ru species by a simple solvothermal approach combined with a sol-gel method. And this compound was applied to the catalytic hydrogenation of α -pinene. The crystal phase, chemical structure and surface components of the catalysts were analyzed by X-ray diffraction, field emission transmission electron microscope, X-ray photoelectron spectroscopy, Fourier transform infrared spectra and thermogravimetric analysis. APTS-functionalization of the catalyst surface contributes to the highly dispersed and uniform Ru species with small particle size, leading to the outstanding conversion of α -pinene and selectivity of cis -pinane over NaNbO 3 /APTS/Ru catalyst. The performance of this catalyst is better than that of other similar catalysts, and is comparable to that of commercial Ru/C. The possible mechanisms of the formation of catalyst and the hydrogenation reaction were proposed and discussed. The decrease of catalytic performance after seven cycles should be ascribed to the decomposition and leaching of APTS during the hydrogenation process. The work provides an alternative strategy to design a kind of reusable catalyst with highly efficient hydrogenation performance based on the surface functionalization. Graphical Abstract
研究领域:
催化
·
材料科学
·
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2019
·Vol. 24
·期 9
·1667
·
IF 3.06
Jinghui Lyu,Kaiyue Xu,Ning Zhang,Chunshan Lu,Qunfeng Zhang,Lu Yu,Feng Feng,Xiaonian Li
A series of waterborne polyurethanes (WPU) with crosslinked siloxane were obtained through introducing 3-(2-aminoethylamino)propyldimethoxymethylsilane (APTS) into WPU by in situ polymerization. The properties of WPU modified by APTS were studied through a variety of experimental methods. The water contact angle of the WPU coating surface increased from 64° to 86°, and the water resistance reduced to 3.90% when 3 wt% APTS was added, which improved the coating surface hydrophobicity. Firstly, Fourier transform infrared (FT-IR) and1H-NMR spectra demonstrated the successful incorporation of APTS to polyurethanes and completed the hydrolytic condensation reaction-generated Si–O–Si crosslinking structure. Furthermore, the surface energy of the membrane was reduced when the crosslinking structure migrated and enriched on the surface of film. Besides, the crosslinking structure was abundant, and the distribution of siloxane in WPU was more uniform.Keywords:waterborne polyurethane;cross-linked siloxane;APTS
研究领域:
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2022
·
IF 7.305
Wei Wang,Zhengzhao Yang,Jiaxin Ding,Jiaqi Kong,Xin Li
Inverted flexible perovskite solar cells (FPSCs) offer a promising route towards commercialization by using undoped inorganic hole transport layers and thermally-stable electron transport layers (ETLs), which deliver good environmental stability such as water resistance. But the power-conversion-efficiencies (PCEs) of inverted flexible perovskite cells are still far below those of FPSCs in regular configuration so far. One main challenge for achieving high-performance FPSCs lies in optimizing the ETLs and their adjacent buffering layers. Herein, we modify the fullerene derivatives (Phenyl-C61-butyric acid methyl ester , PCBM) ETLs by adding 3-aminopropyl triethoxysilane (APTS) molecules into the PCBM solutions. The addition of APTS results in smoother and denser PCBM layers via a physically steric-hindrance effect mechanism, which could benefit the electron collection between the PCBM layer and the perovskite layer. More importantly, APTS can offer nucleating sites, such as amine groups or hydroxy groups by partially hydrolyzing, to grow conformal tin oxide (SnO x ) layers by atomic layer deposition (ALD), which acts as robust buffer layers to replace traditional bathocuproine (BCP) layer. Finally, high-performance inverted FPSCs based on the optimized PCBM/SnO x electron-selective layers are fabricated, delivering a best PCE of 18.62%. The unencapsulated FPSC showed a slow decay and remained above 90% of its initial PCE after being stored for more than 600 h in a damp environment with a humidity of more than 85% R.H. The strategy is demonstrated to be applicable in the future large-scale production of stable FPSCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2011
·Vol. 16
·期 2
·731-738
·
IF 2.234
Yin Huanshun,Zhou Yunlei,Liu Tao,Tang Tiantian,Ai Shiyun,Zhu Lusheng
In this work, 3-aminopropyltriethoxysilane modified Fe 3 O 4 nanoparticles (ATPS-Fe 3 O 4 ) were used to modify glassy carbon electrode for aminopyrine determination. ATPS-Fe 3 O 4 showed obviously catalytic activity and adsorptivity towards aminopyrine oxidation proven by the increased oxidation peak current and the decreased oxidation peak potential. The best analytical response was obtained by immobilizing 8 μL 3 mg/mL APTS-Fe 3 O 4 dispersion with an accumulation time of 200 s at −0.2 V in 0.1 M phosphate buffer solution (pH 9.0). The oxidation peak current of aminopyrine showed linear relationship with its concentration in the range from 0.5 to 100 and 100 to 1600 μM. The detection limit was 0.1 μM (S/N = 3). The proposed method showed satisfactory repeatability and anti-interference ability. The fabricated electrode was successfully applied to determine aminopyrine in pharmaceutical formulations.
研究领域:
分析化学
·
药学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Xue Xue Liang,Xiao-Kun Ouyang,Songyan Wang,Li-Ye Yang,Fangfang Huang,Chao Ji,Xiaohong Chen
The performance of Fe 3 O 4 /attapulgite (APT) nanoparticles in Pb(II) adsorption from aqueous solutions could be improved by modifying the particles with aminopropyltriethoxysilane (APTS) and then combining with chitosan (CS) into beads. After preparing the APTS-Fe 3 O 4 /APT@CS beads, their surface morphology and crystal phases were analyzed by Fourier-transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction. The magnetic properties of APTS-Fe 3 O 4 /APT@CS were studied by a vibrating sample magnetometer, while their heat resistance and stability were characterized by thermal weight analysis. A recycling test and comparison of adsorption capacities were also carried out. The adsorption capacity of Fe 3 O 4 /APT was improved by the modification with APTS and CS. The adsorption process conforms to the pseudo-second-order kinetic and Langmuir adsorption isotherm models. The adsorption of Pb(II) reaches a maximum of 625.34 mg/g, which compares favorably with other reported adsorbents. The results show that APTS-Fe 3 O 4 /APT@CS is a promising hybrid adsorbent for effective removal of Pb(II) from water.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2016
·
IF 4.035
Dan-Dan Zhang,Lin-Lin Hu,Qing Chen,Xu-Wei Chen,Jian-Hua Wang
A novel polyoxometalate (POM)-based hybrid P 8 W 48 -APTS is prepared by the solidification of super-lacunary P 8 W 48 O 184 40- polyoxoanions with APTS in an acidic medium. The oxygen (O − ) atoms in P 8 W 48 O 184 40- are bound to silicon atoms in APTS by the formation of Si-O linkage through dehydration condensation . The solidification is confirmed by characterizations with XRD, FT-IR, TGA , SEM and EDXS . Selective isolation of proteins of interest, hemoglobin (Hb) in this case, from complex sample matrices is achieved by using P 8 W 48 -APTS hybrid as adsorbent under controlled conditions. 5.0 mg of P 8 W 48 -APTS hybrid results in an adsorption efficiency of 93% for 100 mg L −1 hemoglobin in 1.0 mL sample solution at pH 7. The adsorption behavior of Hb onto P 8 W 48 -APTS hybrid fits Langmuir adsorption model, corresponding to an adsorption capacity of 355.0 mg g −1 . The retained Hb could be readily recovered with either a SDS solution (0.1 mol L −1 ) or a Na 3 PO 4 (0.1 mol L −1 ) solution as stripping reagent, providing recoveries of 94.6% or 83.9%, respectively. The biological activity of Hb remains 96.7% after an adsorption/desorption process (with elution by SDS), which illustrates virtually no change on the conformation of hemoglobin. The P 8 W 48 -APTS hybrid has been applied for the selective adsorption of Hb from human whole blood, and the results are demonstrated by SDS-PAGE assay.
研究领域:
材料科学
·
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITE STRUCTURES
·
2019
·
IF 4.829
Chen Xue,Hanyang Gao,Yuchen Hu,Guoxin Hu
In order to meet the increasing demand of damping and shock absorption materials, graphene-based rubber composites are considered as a candidate material because of their excellent strength and toughness. Here, we propose a small and excessive amount of 3-aminopropyl triethoxy silane (APTS) modified graphene oxide as a functional composite material for filling and reinforcing natural rubber, and we also prepare the corresponding natural rubber composites containing graphene oxide (go) and reduced graphene oxide (rgo). Compared with natural rubber filled with carbon black, the crosslinking density and mechanical properties of the composites containing graphene prepared in this paper improved significantly. The strengthening and toughening mechanism of APTS modified graphene oxide filled composites revealed at the micron, nano and even molecular level by FTIR, AFM and SEM characterisation. Notably, by comparing the surface RMS roughness of graphene oxide edited with a small and excessive amount of APTS, we find that the higher the surface roughness of graphene, the more obvious the effect of strengthening and toughening after compounding with natural rubber. These results will be helpful for the application of graphene composites in rubber damping materials.
研究领域:
材料科学
·
复合材料
·
机械工程
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PAPERS
·
2017
·Vol. 69
·期 10
·1298-1311
·
IF 1.258
Shao Yong-Bo,Jing Tao,Tian Jing-Zhi,Zheng Yong-Jie,Shang Ming-Hui
In this paper, Fe 3 O 4 nanoparticles coated with mesoporous silica were prepared successfully, noted as Fe 3 O 4 at the mobile composition of matter No. 41 (MCM-41). Also, Fe 3 O 4 at MCM-41 was grafted by both 3-aminopropyltriethoxysilane (APTS) and 3-chloropropyltriethoxysilane (CPS), noted as Fe 3 O 4 at MCM-41/APTS and Fe 3 O 4 at MCM-41/CPS. The compounds were characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, vibrating sample magnetometry, thermogravimetry and N 2 adsorption/desorption. Then, the enzyme, porcine pancreas lipase (PPL), was immobilized onto these modified nanoparticles by covalent attachment, physical adsorption and cross-linking, noted as Fe 3 O 4 at MCM-41/CPS-PPL, Fe 3 O 4 at MCM-41-PPL and Fe 3 O 4 at MCM-41/APTS-PPL, respectively. The results showed that Fe 3 O 4 at MCM-41/CPS was the best nanomaterial for PPL immobilization, exhibiting enhanced immobilization efficiency (maximum 96%), maximum relative activity (up to 96%), high stability and reusability (83% 56 days and 86.7% ten cycles). Additionally, it offered some other advantages, such as easy recycling and reuse, complying with the trend of green chemistry. Therefore, Fe 3 O 4 at MCM-41/CPS in combination with a relevant method can be proposed for commercial applications.
研究领域:
纳米技术
·
生物催化
·
材料科学
·
酶工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）