Matches in SemOpenAlex for { <https://semopenalex.org/work/W2941418760> ?p ?o ?g. }
- W2941418760 abstract "Mild growth conditions based novel techniques are essential for the controlled synthesis of zinc oxide (ZnO) nanostructure (ZNS) with desired properties. Most of the existing synthesis methods of ZNSs are limited by complicated growth conditions such as high vacuum, expensive devices, high temperature, long growth time and requirement of template. The freshwater pollution due to residual industrial organic dyes is presently being a major environmental concern that needs efficient photocatalytic materials to overcome it. To achieve these goals, this work synthesized good quality ZNS films using two different methods and evaluated the photodegradation of industrial methylene blue (MB) dye by these ZNS films under sunlight irradiation. Such films were grown on glass and silicon (Si) substrates via a simple hydrothermal method in the absence of any catalyst. Prepared samples were characterized using various techniques to determine their physical and optical properties. The effects of growth time and temperature, substrate type, nutrient pH and concentration on the morphology, size, crystallinity, and the emission properties of as-grown ZNS films were evaluated. Results showed that the morphology of these ZNSs was strongly influenced by the growth time, nutrient pH and concentration. A good quality ZNS was achieved within 5 min whereby nutrient solution with lower pH was appropriate for the growth of 1D ZNSs. However, higher pH values produced 3D flower-like ZNSs. Variation of growth temperature from 90-110 oC allowed good size-control of ZNSs. Growth conditions and substrate type dependent emission spectra were used to evaluate the optical band-gap energy. To get better control of the ZNS growth and evolving morphology, a novel catalyst-free and rapid preparation technique was adopted. In this method a mixture of precursor solution and ZnO nanoparticles (ZNPs) colloid/or only ZNPs colloid as a nutrient solution was used. Pulse laser ablation in liquid (PLAL) was combined with hydrothermal (H) method to develop PLAL-H growth technique. A Q-switched Nd:YAG laser with wavelength 532 nm, 8 ns pulse duration, and 10 Hz repetition rate was employed as the irradiation source. Metallic zinc target of 1 mm thick was used to produce colloidal ZNPs. The effects of varying growth time of 0.5, 5, 30 and 60 min and ablation energy of 200-400 mJ on the physical and optical properties of the grown ZNSs were examined. Four types of ZNSs with varying sizes and shapes were obtained on Si substrate at 110 oC for 5 min duration. Increasing ablation energy led to a substantial change of ZNS morphology and promoted the structure quality together with photoluminescence emission intensity. ZNSs synthesized under prolonged growth time of 60 min exhibited remarkable morphology alteration from rod/flower-like ZNSs to ZNPs with higher crystallinity and enlarged bandgap due to increase of nutrient pH of 10.5. Finally, the photocatalytic activities of the optimal ZNS films were assessed via sunlight driven photodegradation of MB dye. Experimental findings verified that the ZNPs prepared by PLAL-H technique possessed excellent photocatalytic efficiency (97.4%) towards degradation of MB dye. The observed boost in the photocatalytic activities was ascribed to the synergism of the improved surface area and band-gap modification. It was established that the proposed novel PLAL-H growth strategy is not only cost-effective but greatly useful for the rapid production of different quality of ZNSs at low temperature in a controlled way. This may overcome the shortcomings involving the effective exploitation of sunlight source towards practical photocatalytic applications of ZNSs." @default.
- W2941418760 created "2019-05-03" @default.
- W2941418760 creator A5083631091 @default.
- W2941418760 date "2017-01-01" @default.
- W2941418760 modified "2023-09-23" @default.
- W2941418760 title "Photocatalytic properties of zinc oxide nanostructures synthesized using synergistic pulse laser ablation and hydrothermal methods" @default.
- W2941418760 cites W1002594732 @default.
- W2941418760 cites W1212490493 @default.
- W2941418760 cites W1497472629 @default.
- W2941418760 cites W1521579547 @default.
- W2941418760 cites W1578696950 @default.
- W2941418760 cites W1851631694 @default.
- W2941418760 cites W1854025783 @default.
- W2941418760 cites W1951833847 @default.
- W2941418760 cites W1963920922 @default.
- W2941418760 cites W1965185584 @default.
- W2941418760 cites W1967045162 @default.
- W2941418760 cites W1967276978 @default.
- W2941418760 cites W1967652077 @default.
- W2941418760 cites W1974124703 @default.
- W2941418760 cites W1975834248 @default.
- W2941418760 cites W1977336573 @default.
- W2941418760 cites W1977527032 @default.
- W2941418760 cites W1977767591 @default.
- W2941418760 cites W1978733928 @default.
- W2941418760 cites W1979480447 @default.
- W2941418760 cites W1980838398 @default.
- W2941418760 cites W1982418552 @default.
- W2941418760 cites W1982595994 @default.
- W2941418760 cites W1982717603 @default.
- W2941418760 cites W1985702283 @default.
- W2941418760 cites W1987809524 @default.
- W2941418760 cites W1991850955 @default.
- W2941418760 cites W1993964620 @default.
- W2941418760 cites W1997724541 @default.
- W2941418760 cites W1998645477 @default.
- W2941418760 cites W1998674391 @default.
- W2941418760 cites W1998693251 @default.
- W2941418760 cites W1998756352 @default.
- W2941418760 cites W1999471567 @default.
- W2941418760 cites W2001512848 @default.
- W2941418760 cites W2002159152 @default.
- W2941418760 cites W2002416577 @default.
- W2941418760 cites W2003042754 @default.
- W2941418760 cites W2004088665 @default.
- W2941418760 cites W2005988666 @default.
- W2941418760 cites W2010318691 @default.
- W2941418760 cites W2010790057 @default.
- W2941418760 cites W2015459002 @default.
- W2941418760 cites W2017138767 @default.
- W2941418760 cites W2017592593 @default.
- W2941418760 cites W2020384118 @default.
- W2941418760 cites W2020389439 @default.
- W2941418760 cites W2020947404 @default.
- W2941418760 cites W2022423007 @default.
- W2941418760 cites W2023988808 @default.
- W2941418760 cites W2025915913 @default.
- W2941418760 cites W2026646517 @default.
- W2941418760 cites W2027303310 @default.
- W2941418760 cites W2028402842 @default.
- W2941418760 cites W2031815116 @default.
- W2941418760 cites W2034148026 @default.
- W2941418760 cites W2034778416 @default.
- W2941418760 cites W2035966361 @default.
- W2941418760 cites W2037370354 @default.
- W2941418760 cites W2039091772 @default.
- W2941418760 cites W2039388581 @default.
- W2941418760 cites W2040392078 @default.
- W2941418760 cites W2041341136 @default.
- W2941418760 cites W2043269636 @default.
- W2941418760 cites W2043749475 @default.
- W2941418760 cites W2044817986 @default.
- W2941418760 cites W2046905865 @default.
- W2941418760 cites W2047103001 @default.
- W2941418760 cites W2047663581 @default.
- W2941418760 cites W2048193275 @default.
- W2941418760 cites W2051301259 @default.
- W2941418760 cites W2053997426 @default.
- W2941418760 cites W2054683423 @default.
- W2941418760 cites W2057962355 @default.
- W2941418760 cites W2058234472 @default.
- W2941418760 cites W2060256316 @default.
- W2941418760 cites W2063877501 @default.
- W2941418760 cites W2065746456 @default.
- W2941418760 cites W2067213359 @default.
- W2941418760 cites W2067847810 @default.
- W2941418760 cites W2068389071 @default.
- W2941418760 cites W2068483613 @default.
- W2941418760 cites W2069145116 @default.
- W2941418760 cites W2069547105 @default.
- W2941418760 cites W2070061074 @default.
- W2941418760 cites W2071772389 @default.
- W2941418760 cites W2074425686 @default.
- W2941418760 cites W2077844985 @default.
- W2941418760 cites W2078485055 @default.
- W2941418760 cites W2080493238 @default.
- W2941418760 cites W2081577998 @default.
- W2941418760 cites W2083584399 @default.
- W2941418760 cites W2086271246 @default.
- W2941418760 cites W2086440506 @default.