Time filter

Source Type

Zhu Y.S.,Nanjing University of Technology | Zhu Y.S.,Fudan University | Li L.,Fudan University | Li L.,Shaanxi Applied Physics Chemistry Research Institute | And 3 more authors.
International Journal of Hydrogen Energy | Year: 2015

The photoelectrochemical (PEC) behaviour of cadmium sulphide/fluorine-doped tin oxide conductive glass (CdS/FTO) photoanode that prepared by simple chemical bath deposition to split formic acid and produce hydrogen was tested. Compared to splitting water or utilizing FTO as anode, the splitting voltage to produce hydrogen on CdS/FTO anode is extremely low when the PEC reaction is carried out in formic acid solution irradiated with visible light. Furthermore, the energy conversion efficiency can be 1.2%. This may offer a new route for hydrogen production and treatment of formic acid waste water. © 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. Source

Yin D.,Northwestern Polytechnical University | Liu H.,Shaanxi Applied Physics Chemistry Research Institute | Ma L.,Northwestern Polytechnical University | Zhang Q.,Northwestern Polytechnical University
Polymers for Advanced Technologies | Year: 2015

Microencapsulated phase change materials (MePCMs) using melamine-formaldehyde resin/SiO2 as shell were investigated in this paper. Organically modified SiO2 particles were employed to stabilize Pickering emulsion, and in situ polymerization of melamine and formaldehyde was carried out to form hybrid shell. The performances of resultant MePCMs with hybrid shell were investigated comparatively with the MePCMs with polymer shell. SiO2 particles raise the microencapsulation efficiency by improving the stability of emulsion and providing a precipitation site for melamine-formaldehyde resin. Also, the mechanical strength, thermal reliability, and anti-osmosis performance of MePCMs were improved significantly by SiO2 particles in the shell. Our study shows that Pickering emulsion is a simple and robust template for MePCMs with polymer-inorganic hybrid shell. © 2015 John Wiley & Sons, Ltd. Source

Wang Y.,Northwestern Polytechnical University | Kou K.,Northwestern Polytechnical University | Zhao W.,Shaanxi Applied Physics Chemistry Research Institute | Wu G.,Northwestern Polytechnical University | And 2 more authors.
RSC Advances | Year: 2015

Functionalized benzoxazine with allyl groups has recently attracted a great deal of attention due to its polymerizable group. In order to improve the properties of 4,4′-bismaleimidodiphenyl methane (BMI)/cyanate ester (BADCy), benzoxazine (Boz) was added into the BMI/BADCy system in this paper. The effect of functionalized Boz with allyl groups on the dielectric, mechanical and thermal properties of BMI/BADCy composites was systematically investigated in detail using mechanical measurements, scanning electron microscopy (SEM), dynamic mechanical analysis (DMA) and thermo-gravimetric analysis (TGA). The results showed that the formation of Mannich bridge networks and an interpenetrating polymer network through the polymerization of Bz-allyl and BMI/BADCy increased the cross-linking densities and thermal stability. Allyl-based polymers also exhibited high glass transition temperatures, and higher char yields. The dielectric constant value and the dielectric loss factor of BBz2 reached minimum values of 3.17 and 0.083 at 106 Hz respectively. The mechanical properties (a high flexural modulus of 4.18 GPa and flexural strength of 120 MPa) of BBz2 were superior. Scanning electron microscopy analysis showed a distinct characteristic of ductile fractures for the blends. © The Royal Society of Chemistry 2015. Source

Li H.,Yulin University | Zhao B.,Northwest University, China | Bai W.,Shaanxi Applied Physics Chemistry Research Institute | Zhang X.,Northwest University, China
Advanced Materials Research | Year: 2013

This study has investigated the degradation of H-acid (1-amino-8-naphthol-3, 6-disulfonic acid) containing water by catalytic wet hydrogen peroxide oxidation method, in which the catalyst of Fe/SiO2 was prepared by impregnation technology. The effect of catalyst dosage, initial pH value, amount of hydrogen peroxide and reaction temperature on the degradation process have been discussed, and the results indicated that wet hydrogen peroxide oxidation is an effective method for treating the wastewater containing H-acid, under the conditions that: catalyst dosage was 2 g, initial pH value was 7, amount of hydrogen peroxide was 10 mL (0.83 time of theoretical required amount) and reaction temperature was 80 °C, the COD and color removal rate can reach 87.3% and 96.5%, respectively. © (2013) Trans Tech Publications, Switzerland. Source

Li P.,Northwestern Polytechnical University | Yang R.,Northwestern Polytechnical University | Zheng Y.,Northwestern Polytechnical University | Qu P.,Shaanxi Applied Physics Chemistry Research Institute | Chen L.,Northwestern Polytechnical University
Carbon | Year: 2015

A series of specific solvent-free nanofluids with ionically tethered polyether amine terminated polymers were successfully prepared and evaluated based on multiwalled carbon nanotubes (MWCNTs). The newly synthesized sorbents exhibited enhanced carbon dioxide (CO2) capture capacities compared to their corresponding polyether amine and pristine MWCNTs. The effects of polyether amine canopy structure such as amine types, Molecular weight (Mw), Ethylene Oxide/Propylene Oxide (EO/PO), viscosity and melting point on CO2 capture capacities were investigated. It had been demonstrated that the sorbents impregnated with more unprotonated amine groups and higher Mw or EO/PO showed larger CO2 capture capacities and good stabilities over multiple adsorption-desorption cycles. Last but not least, we also demonstrated that the lower melting point and viscosity were beneficial for the CO2 uptake. © 2015 Elsevier Ltd. Source

Discover hidden collaborations