01991nas a2200229   4500008004100000022001400041245011500055210006900170260010600239300001200345490000700357520109500364653002501459653001201484653001901496653002301515653001801538100002801556700002201584700002501606856013001631       2011                        eng d  a0025-540800aLow temperature pH dependent synthesis of flower-like ZnO nanostructures with enhanced photocatalytic activity0 aLow temperature pH dependent synthesis of flowerlike ZnO nanostr  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcMAY  a771-7780 v463 a<p>In the present study we have synthesized flower-like ZnO nanostructures comprising of nanobelts of 20 nm width by template and surfactant free low-temperature (4 degrees C) aqueous solution route. The ZnO nanostructures exhibit flower-like morphology, having crystalline hexagonal wurtzite structure with (001) orientation. The flowers with size between 600 and 700 nm consist of ZnO units having crystallite size of similar to 40 nm. Chemical and structural characterization reveals a significant role of precursor: ligand molar ratio, pH, and temperature in the formation of single-step flower-like ZnO at low temperature. Plausible growth mechanism for the formation of flower-like structure has been discussed in detail. Photoluminescence studies confirm formation of ZnO with the defects in crystal structure. The flower-like ZnO nanostructures exhibit enhanced photochemical degradation of methylene blue (MB) with the increased concentration of ligand, indicating attribution of structural features in the photocatalytic properties. (C) 2010 Elsevier Ltd. All rights reserved.</p>10aCatalytic properties10aDefects10aNanostructures10aOptical properties10aSemiconductor1 aVaishampayan, Mukta, V.1 aMulla, Imtiaz, S.1 aJoshi, Satyawati, S.  uhttps://library.ncl.res.in/content/low-temperature-ph-dependent-synthesis-flower-zno-nanostructures-enhanced-photocatalytic-0