Low-temperature hydrothermal synthesis of ZnO nanosheet using organic/inorganic composite as seed layer

Ueno, Naoyuki; Yamamoto, Akinobu; Uchida, Yoshiyuki; Egashira, Yasuyuki; Nishiyama, Norikazu

doi:10.1016/j.matlet.2012.07.033

Cited by 12 publications

(4 citation statements)

References 21 publications

(18 reference statements)

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“…The results indicate that the AZO seed layer possesses a wurtzite crystal structure according to the standard data (JCPDS, No. 99–1111) with (100) preferred plane, different from (002) dominant ZnO thin layer prepared using other methods like the sol-gel and magnetron sputtering methods 26 . There are no extra peaks related to aluminum metal and those from other zinc aluminum phase, indicating that the Al ions substituted the Zn sites without changing the wurtzite structure.…”

Section: Resultsmentioning

confidence: 96%

Micro/Nano hierarchical peony-like Al doped ZnO superhydrophobic film: The guiding effect of (100) preferred seed layer

Wang

Kong

et al. 2016

Sci Rep

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In this communication, we present a versatile and controllable strategy for formation of superhydrophobic micro/nano hierarchical Al doped ZnO (AZO) films with a water contact angle (CA) of 170 ± 4°. This strategy involves a two-step layer-by-layer process employing an atomic layer deposition (ALD) technique followed by a hydrothermal method, and the resulting novel AZO surface layer consists of (100) dominant nano-rice-like AZO seed layer (the water CA of 110 ± 4°) covered with micro-peony-like AZO top. The growth mechanisms and superhydrophobic properties of the hierarchical AZO layer are discussed. It is believed that the present route holds promise for future success in the design and development of practical superhydrophobic materials.

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Section: Resultsmentioning

confidence: 96%

Micro/Nano hierarchical peony-like Al doped ZnO superhydrophobic film: The guiding effect of (100) preferred seed layer

Wang

Kong

et al. 2016

Sci Rep

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“…Such as continuous hydrothermal synthesis using decanoil acid‐modified and oleic acid modified nano‐particles. Other researchers who have published in this area and reported their findings include [ 231 , 232 , 233 , 234 ].…”

Section: Catalyst Preparation Methodsmentioning

confidence: 99%

A review of sustainable biodiesel production using biomass derived heterogeneous catalysts

Maroa

Inambao

2021

Engineering in Life Sciences

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The production of biodiesel through chemical production processes of transesterification reaction depends on suitable catalysts to hasten the chemical reactions. Therefore, the initial selection of catalysts is critical although it is also dependent on the quantity of free fatty acids in a given sample of oil. Earlier forms of biodiesel production processes relied on homogeneous catalysts, which have undesirable effects such as toxicity, high flammability, corrosion, by-products such as soap and glycerol, and high wastewater. Heterogeneous catalysts overcome most of these problems. Recent developments involve novel approaches using biomass and bio-waste resource derived heterogeneous catalysts. These catalysts are renewable, non-toxic, reusable, offer high catalytic activity and stability in both acidic and base conditions, and show high tolerance properties to water. This review work critically reviews biomass-based heterogeneous catalysts, especially those utilized in sustainable production of biofuel and biodiesel. This review examines the sustainability of these catalysts in literature in terms of small-scale laboratory and industrial applications in large-scale biodiesel and biofuel production. Furthermore, this work will critically review natural heterogeneous biomass waste and bio-waste catalysts in relation to upcoming nanotechnologies. Finally, this work will review the gaps identified in the literature for heterogeneous catalysts derived from biomass and other biocatalysts with a view to identifying future prospects for heterogeneous catalysts.Abbreviations: Al 2 O 3 , aluminum oxide; Ba, barium; BaO, barium oxide; C=O, carbonyl group; Ca, calcium; Ca 10 (PO 4 ) 6 (OH) 2 , HAP, hydroxyapatite; Ca 2 FeO 5 , calcium ferrite oxide; CaCO 3 , calcium carbonate; CaMg (CO 3 )2, dolomite; CaMnO 3 , orthorhombic perovskite; CaO, calcium oxide; CaO-CeO 2 , cerium (IV) oxide; CaTiO 3 , calcium titanate; CaZrO 3 , calcium zirconate; CH 3 OK, potassium methoxide; CH 3 ONa, sodium methoxide; CO 2 , carbon dioxide; COOH, carboxylic group; CsZrO 2 , chitoson zirconium oxide; DNA, deoxyribonucleic acid; FAAE, fatty acid alkyl esters; FAME, fatty acid methyl ester; Fe 3 O 4 , magnetic oxide (magnetite); FeCl 3 , ferric chloride; FFA, free fatty acid; FTIR, Fourier transform infrared; H 2 SO 4 , sulfuric acid; H 3 PO 4 , phosphoric acid; HCL, hydrochloric acid; HCs, hydrocarbons; HTHP, higher temperatures and pressure; K 2 CO 3 , potassium carbonate; K 2 O, potassium oxide; KF, potassium fluoride; KI, potassium iodide; KNO 3 , potassium nitrate; KOH, potassium hydroxide; La 2 O 3 , lanthanum oxide; Li/ZnO, lithium (Li) doped zinc oxide;

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“…Hydrothermal synthesis of ZnO nanosheets is a well-established method, and it deals with synthesis at a temperature less than 100 °C using a hot air oven in most of the literature [15]. A hot plate was used in the current work instead of a hot air oven to provide growth temperature to the growth precursor solution.…”

Section: Introductionmentioning

confidence: 99%

A simple and low-cost approach for the synthesis and fabrication of ZnO nanosheet-based nanogenerator for energy harvesting and sensing

Supraja

Mishra

et al. 2021

Eng. Res. Express

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Reducing the cost of the synthesis process and device fabrication plays an essential role in modestly developing products. In the present report, a simple and low-cost approach for the synthesis of ZnO nanosheets and the fabrication of a piezoelectric nanogenerator is developed. The ZnO nanosheets are synthesized by hot plate assisted hydrothermal method and characterized for their morphology, crystallinity, composition. The fabricated nanogenerator device produced an open-circuit voltage of ∼220 mV upon finger tapping. The series connection of seven such devices produced an open-circuit voltage of ∼1.2 V. The ZnO nanosheets films synthesized at a growth temperature of 85 °C for a growth duration of 4 h are found to be optimum parameters for making the nanogenerator device with high output. The nanogenerator response is recorded for different frequencies of finger tapping and different finger-tapping pressures. Further, the fabricated nanogenerator exhibited a stable output response over 1100 cycles confirms the high durability of the fabricated device. The fabricated nanogenerator is explored further for pressure sensing application.

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Low-temperature hydrothermal synthesis of ZnO nanosheet using organic/inorganic composite as seed layer

Cited by 12 publications

References 21 publications

Micro/Nano hierarchical peony-like Al doped ZnO superhydrophobic film: The guiding effect of (100) preferred seed layer

Micro/Nano hierarchical peony-like Al doped ZnO superhydrophobic film: The guiding effect of (100) preferred seed layer

A review of sustainable biodiesel production using biomass derived heterogeneous catalysts

A simple and low-cost approach for the synthesis and fabrication of ZnO nanosheet-based nanogenerator for energy harvesting and sensing

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