microwave assisted hydrothermal synthesis of single crystalline zno nanorods for

... 2011Keywords: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 applicationPrabhakar Rai, Hyeon-Min Song, ... as prepared ZnO nanorods can beselectively used for ethanol at 200 °C testing temperature.4. Conclusions Single crystalline, ZnO nanorods are synthesized by microwave assisted hydrothermal...

sol–gel assisted hydrothermal synthesis of zno microstructure

... spectra of the as-synthesized ZnO samples. (b)(ahv)2versus hv curves for the band gap determination.Table 1Relevant information of as-synthesized ZnO samples.Sample ZnO- 12 ZnO- 13 ZnO- 14SBET(m2/g) ... mechanisms of different ZnO microstructuresThe schematic illustration of the formation process is presentedin Fig. 4 and the possible formation mechanisms of different mor-phologies of ZnO were ... morphology of the ZnO sample has great inﬂu-ence on its photocatalytic activity. After irradiation for 120 min,the degradation ratios of KGL were about 27.8% for ZnO- 13, whilenearly 100% for ZnO- 12,...

synthesis of single-crystalline hollow b-feooh nanorods via a controlled

... fabricating single- crystalline b-FeOOH hollow nanorods with lengthin the range of 70–110 nm and width in the range of 20–30 nm. In particular, a process mechanismhas 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; (ii) decomposition of residual Fe(OH)3inside the nanorods ... The formation mechanism of the hollow nanorods has been discussed. It is found that the mixed system including chitosan and n-propanol is essential for theﬁnal formation of the hollow b-FeOOH nanorods. IntroductionRecently,...

hydrothermal synthesis of dumbbell-shaped zno microstructures

... H2Oisfavorable for the formation of ZnO with rod-like morphology[30]. The concentration of NH3Á H2O is 15 mol/L in presentexperiment, and therefore a large number of ZnO nanorods were synthesized ... TEM image of ZnO dumbbell. The SEMand TEM results show that the dumbbell-shaped ZnO micro-structures may be formed by self-assembly of ZnO nanorods inpresent experiment. The possible formation ... reaction time, the dumbbell-shaped ZnO microstructures are formed by self-assembly of ZnO nanorods. The photoluminescence (PL) property of dumbbell-shaped ZnO microstructures was carried out...

controllable hydrothermal synthesis of zno nanowires arrays on al-doped zno

... www.elsevier.com/locate/apsuscControllable hydrothermal synthesis of ZnO nanowires arrays on Al-doped ZnO seed layer and patterning of ZnO nanowires arrays via surface modiﬁcation of substrateJin ... temperature of 500◦C for 1 h in the air [19].2.2. Hydrothermal synthesis of the ZnO NWs on the ZnO and AZOseed layersVertically aligned ZnO NW ... the length of the ZnO- NWA is much longer that of the ZnO- NWZ and the diam-eter of the ZnO- NWA is much smaller than that of the ZnO- NWZ.These...

ethylene glycol assisted hydrothermal synthesis offlower like zno architectures

... 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 anabundant variety of shapes, such as nanoneedles, ... E1(TO) of ZnO crystals respectively. The photoluminescencespectrum exhibits strong UV emission at ~397 nm, which comes from recombination of exciton. The possiblemechanism for the formation of...

solgel based hydrothermal method for the synthesis of 3d flowerlike zno microstructures

... 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 synthesized at 120 ƕC for different hydrothermal ... with flower-like ZnO composed of nanorods [1424], including hexagonal nanorods [1518], sword-like nanorods [1722], needle-like nanorods [23,24], or other forms of flower-like ZnO [5,2531]....

Ultrafast growth of single crystalline si nanowires

... 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 ... simplemethod of growing SiNWs. Si nanopowder was used in ourwork instead of the dangerous gas of silane as the Si source.The synthesis of SiNWs was carried out using a mixture of Sinanoparticles ... presence or absence of metal catalysts in the synthesis process, i.e., SLS and VLS except for oxide -assisted growth[12]. Unlike the well-developed VLS, the detail of SLS process for silicon nanowires...

a rapid hydrothermal synthesis of rutile sno2 nanowires

... www.elsevier.com/locate/msebA rapid hydrothermal synthesis of rutile SnO2nanowiresO. Lupana,b,∗, L. Chowa, G. Chaic, A. Schultea,S.Parka, H. Heinricha,daDepartment of Physics, University of Central Florida, ... reported a low-temperature hydrothermal synthesis of SnO2 nanorods at 160◦C,but the process requires at least 12h. Vayssieres and Graetzel [15]reported SnO2 nanorods arrays grown on F-SnO2glass ... ModelMSB-11957; No .of Pages4O. Lupan et al. / Materials Science and Engineering B xxx (2009) xxx–xxx 3Fig. 3. HRTEM images of an individual SnO2nanowire. The upper right inset is aSAED of a single- crystalline...

electrochromics of single crystalline wo3 · h2o nanorods

... reduced form of MxW6+(1Àx)W5+xO3is close to 1 for the rod-type WO3Æ H2O nanocrystals instead of 0.7 for the platelet-type WO3Æ H2O nanocrystals.The electrochromic performance of ... Electrochromics of single crystalline WO3Æ H2O nanorods Xiaolan Wei1, Pei Kang Shen*State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, ... stabilizer. The eﬀect of the mor-phologies of WO3Æ H2O for the same crystalline phase andthe diﬀerent intercalation degrees of cations into the WO3ﬁlms on the electrochromic performance was investigated.2....

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