Preparation and photoactivity of BiVO4

... PREPARATION AND PHOTOACTIVITY OF BiVO4 LUO YINGLING (B Sc., Beijing Forestry University) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF SCIENCE DEPARTMENT OF CHEMISTRY NATIONAL UNIVERSITY OF ... 1.5 Aims of the present study 11 References 11 Chapter Experimental 2.1 Catalyst preparation 14 2.1.1 Synthesis of BiVO4 with BiCl3 and NH4VO3 14 2.1.2 Synthesis of BiVO...

Ngày tải lên: 30/09/2015, 10:12

... PVDF-SPS composite membrane Table shows the water uptake of the pristine PVDF membrane, the PVDF-PS membrane and the PVDF-SPS composite membrane The blending of PS polymer reduces the water uptake of ... of the PVDF-SPS membrane: (a) C1s, (b) O1s, (c) S2p 3.4 Morphology of the PVDF-SPS composite membrane The morphologies of the pristine PVDF...

Ngày tải lên: 05/09/2013, 16:11

... range of 227-247 o C and the ratio of the height of the main peak to that of the other small peaks is rather great In order to obtain high sensitive LiF:Mg,Cu,Na,Si TL powder, the optimum preparation ... as a single dopant and its concentration was calculated as total of Na and Si because the compound Na2 SiO3.9H2 O was added) The X-ray diffraction (XRD) patterns of four...

Ngày tải lên: 13/02/2014, 04:20

... concentration of the SnCl4 solution, and the films were annealed at different temperatures and for different period of time Photoconductivity measurement In order to evaluate properties of obtained films ... steps of spray pyrolysis for TiO2 and sol-gel for SnO2 As prepared films exhibit a nanocomposite structure, constituting of a majority of TiO2 and a small amou...

Ngày tải lên: 13/02/2014, 04:20

Ngày tải lên: 14/03/2014, 13:20

... scale, high density SiOx nanowires have been synthesized by using a novel nm Fe3O4 nanoparticles catalyst The SiOx nanowires with lengths of several tens to hundreds of micrometers and diameters of ... also detected the existence of iron only at the top of SiOx nanowires The fact suggested that the Fe3O4 catalysts play a key role in the formation of Si...

Ngày tải lên: 16/03/2014, 15:11

... area of CNTs was also the basis for formation of the composites Though the density of TiO2 is larger than that of CNTs, the TiO2 – CNTs composites could form a homogeneous dispersion in ethanol and ... particles formed in the course of hydrolysis of Ti (OBu)4 Due to the – OH group on TiO2 [23] and the C –O, C=O and O – C=O groups on purified CNTs as aforesai...

Ngày tải lên: 20/03/2014, 13:06

... The nanosheet structure after calcinations was destroyed and changed to nanorods/nanoparticles composite at high temperature [27,30] Conclusions In summary, high surface area nanosheet TiO2 with ... diameter and about 5–10 nm in particles diameter, Fig 6(a–f)) The SEM, TEM, and SAED images of the nanosheet TiO2 calcined at 600 and 700 °C showed almost nanoparticles...

Ngày tải lên: 20/03/2014, 13:06

... physisorption on Ti4+ cations and the second maximum (45 Æ K) is ascribed to N2 physisorption on O2À anions On as-deposited WO3, the TPD intensity of physisorbed N2 attributable to adsorption on Ti4+ ... would contain 2.6 (WO3) 3 nmÀ2, i.e., one (WO3) 3 cluster for every pair of Ti4+ along the [001] direction With this definition, deposition of 7.8 nmÀ2 of WO3 corresponds...

Ngày tải lên: 20/03/2014, 13:06

... sample S2 (c and d) and ␥-Fe2 O3 nanotubes in sample S3 (e and f) B Lv et al / Particuology (2008) 334–339 and outer and inner diameters of 70–120 nm and 45–80 nm, respectively Fig 3(c) and (d) show ... loop of ␥-Fe2 O3 nanotubes shows ferromagnetic behavior with a Ms of 42.71 emu/g, a Mr of 338 B Lv et al / Particuology (2008) 334–339 Fig M–H loops of Fe3 O4 nan...

Ngày tải lên: 20/03/2014, 13:06

... Vecchio P, Fessas D, Giancola C & Graziano G (1993) THESEUS: a new software package for the handling and analysis of thermal denaturation data of biological macromolecules J Thermal Anal 38, 2779–2790 ... C Giancola et al Geodin, a sponge bc-crystallin-type protein Table Domain–domain interface analysis of alternative models of geodin domain assembly Mod-prs Mod-prs Mod...

Ngày tải lên: 30/03/2014, 15:20

... the preparation   and   serving   of   special   food   items     Successfully   completed,   this subcourse will provide you with a working knowledge of the preparation and serving of   special ... requiring  a knowledge of the preparation and serving of special food items i CONTENTS LESSON CREDIT HOURS TITLE PAGE Buffet Service 2 Preparation and Serving of Appetizers and Pa...

Ngày tải lên: 03/05/2014, 12:14

... 3.6 g of iron-oleate, 1.91 mL of oleylamine and 0.64 mL of oleic acid were mixed together and were heated at 120∘C for one hour After that, the dark solution was quickly heated up to 200∘C and ... CTAB;[16] and 0.5 mL of the resulting Fe3 O4 /CTAB aqueous solution were diluted with 10 mL of water Then 0.3 mL of NH4 OH aqueous solution, 0.03 mL of tetraethylorthosilicat...

Ngày tải lên: 14/05/2014, 15:49

... angles on nanoporous alumina AK and CE participated in the design of the study and coordination of the work All authors contributed to interpretation of the results and drafting of the manuscript and ... technological applications Additional material Additional file 1: Water contact angles on alumina surfaces Contact angles of the water droplets on HMDS-modified th...

Ngày tải lên: 21/06/2014, 01:20

... viscosity, thermal conductivity, and thermal oxidation stability of the nanofluids are also investigated Experimental Materials and preparation of ligand All the materials and solvents used in this ... r and ν are the density and kinematic viscosity of the nanofluid, respectively, at the same temperature Measurements of the thermal conductivities of Cu nanofluids were pe...

Ngày tải lên: 21/06/2014, 03:20