microwave assisted hydrothermal synthesis of single crystalline zno nanorods for

... 2011 Keywords: Ceramics ZnO nanorods Microwave- assisted hydrothermal synthesis Single crystalline Gas sensing property Single crystalline ZnO nanorods were synthesized via microwave assisted hydrothermal ... Microwave assisted hydrothermal synthesis of single crystalline ZnO nanorods for gas sensor application Prabhakar Rai, Hyeon-Min Song, .....

Ngày tải lên: 06/05/2014, 13:24

... spectra of the as-synthesized ZnO samples. (b) (ahv) 2 versus hv curves for the band gap determination. Table 1 Relevant information of as-synthesized ZnO samples. Sample ZnO- 12 ZnO- 13 ZnO- 14 S BET (m 2 /g) ... mechanisms of different ZnO microstructures The schematic illustration of the formation process is presented in Fig. 4 and the possible formation mechanisms of...

Ngày tải lên: 06/05/2014, 13:26

... fabricating single- crystalline b-FeOOH hollow nanorods with length in the range of 70–110 nm and width in the range of 20–30 nm. In particular, a process mechanism has been revealed for synthesis of single- crystalline b-FeOOH ... single- crystalline b-FeOOH hollow nanorods: (i) formation of b-FeOOH nanorods by aggregation-dehydration of most amorphous Fe(OH) 3 ;...

Ngày tải lên: 20/03/2014, 13:08

... H 2 Ois favorable for the formation of ZnO with rod-like morphology [30]. The concentration of NH 3 Á H 2 O is 15 mol/L in present experiment, and therefore a large number of ZnO nanorods were synthesized ... TEM image of ZnO dumbbell. The SEM and TEM results show that the dumbbell-shaped ZnO micro- structures may be formed by self-assembly of ZnO nanorods in present...

Ngày tải lên: 06/05/2014, 13:24

... www.elsevier.com/locate/apsusc Controllable hydrothermal synthesis of ZnO nanowires arrays on Al-doped ZnO seed layer and patterning of ZnO nanowires arrays via surface modification of substrate Jin ... temperature of 500 ◦ C for 1 h in the air [19]. 2.2. Hydrothermal synthesis of the ZnO NWs on the ZnO and AZ...

Ngày tải lên: 06/05/2014, 13:22

... spectrum of the ZnO. Fig. 4. Growth schematic diagram of flower like ZnO architecture prepared (a) absence of ethylene glycol and (b) presence of ethylene glycol. Fig. 5. Raman spectrum of ZnO crystals. ... ses me thods ca pable of formation of different types of ZnO nanostructures have been demon- strated [8,9].Uptonow,well-defined ZnO nanostructures with an abundant...

Ngày tải lên: 06/05/2014, 13:23

... necessary for effective photodegradation of the KGL dye [51]. After irradiation for 120 min, the degrees of degradation of KGL were about 82.17% for the ZnO (150 ºC) sample, and almost 100% for ZnO ... illustration of the formation process of the 3D flower-like ZnO. Fig. 4. (a) Bar graph illustration of the photocatalytic degradation of KGL using ZnO samples sy...

Ngày tải lên: 06/05/2014, 13:26

... heat treatment is more ascendant for providing ultrafast growth of single- crystalline Si nanowires and controlling the diameter of them easily. The growth of single- crystalline SiNWs and morphology ... simple method of growing SiNWs. Si nanopowder was used in our work instead of the dangerous gas of silane as the Si source. The synthesis of SiNWs was carried out usin...

Ngày tải lên: 16/03/2014, 15:13

... www.elsevier.com/locate/mseb A rapid hydrothermal synthesis of rutile SnO 2 nanowires O. Lupan a,b,∗ , L. Chow a , G. Chai c , A. Schulte a ,S.Park a , H. Heinrich a,d a Department of Physics, University of Central Florida, ... reported a low- temperature hydrothermal synthesis of SnO 2 nanorods at 160 ◦ C, but the process requires at least 12h. Vayssieres and Graetzel [15]...

Ngày tải lên: 19/03/2014, 16:47

... reduced form of M x W 6+ (1Àx) W 5+ x O 3 is close to 1 for the rod-type WO 3 Æ H 2 O nanocrystals instead of 0.7 for the platelet-type WO 3 Æ H 2 O nanocrystals. The electrochromic performance of ... Electrochromics of single crystalline WO 3 Æ H 2 O nanorods Xiaolan Wei 1 , Pei Kang Shen * State Key Laboratory of Optoelectronic Materials and Technologies, School of Phy...

Ngày tải lên: 19/03/2014, 16:48