02054nas a2200169   4500008004100000022001400041245012200055210006900177260007100246300001600317490000700333520134600340100002801686700002201714700002501736856012301761       2011                        eng d  a0743-746300aOptical and photocatalytic properties of single crystalline ZnO at the air-liquid interface by an aminolytic reaction0 aOptical and photocatalytic properties of single crystalline ZnO   a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcOCT  a12751-127590 v273 a<p>Crystalline flowerlike ZnO was synthesized by an aminolytic reaction at the air-liquid interface in an aqueous media at an alkaline pH. A thin visible film was formed at the air-liquid interface by self-assembly of flowerlike ZnO. Diffraction studies show rearrangement of the single crystalline units at the air-liquid interface leading to the formation of nanobelts. These nanobelts overlap systematically to form petals of the flowerlike structure; individual petals get curved with time. Each nanobelt is found to be single crystalline and can be indexed as the hexagonal ZnO phase. The organic product formed in the aminolytic reaction and dissolution-reprecipitation mechanism is the driving force for the formation of flowerlike ZnO at the air-liquid interface. A clear relationship between the surface, photocatalytic, and photoluminescent properties of ZnO is observed. The flowerlike structure exhibits a blue shift (3.56 eV) in the band emission as compared to bulk ZnO (3.37 eV). The photodegradation of methylene blue over the flowerlike ZnO catalyst formed at the air-liquid interface and in the sediments shows enhanced photocatalytic activity. The sub-bands formed due to surface defects facilitate separation of charge carriers increasing their lifetime, leading to enhanced photocatalytic activity of flowerlike ZnO.</p>1 aVaishampayan, Mukta, V.1 aMulla, Imtiaz, S.1 aJoshi, Satyawati, S.  uhttps://library.ncl.res.in/content/optical-and-photocatalytic-properties-single-crystalline-zno-air-liquid-interface-0