Nanostructured zinc oxide films grown from microwave activated aqueous solutions

Peiró, Ana M.; Domingo, Concepción; Peral, José; Domènech, Xavier; Vigil, Elena; Hernández-Fenollosa, M.A.; Mollar, M.; Marı́, B.; Ayllón, José A.

doi:10.1016/j.tsf.2004.12.030

Cited by 60 publications

(45 citation statements)

References 34 publications

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“…Among which, ZnO has wide applications in the areas such as solar cells [2][3][4], catalysis [5,6], sensors [7], laser diodes [8] and varistors [5,9]. Various techniques had been employed for the synthesis of the nano/micro structured ZnO such as sol-gel process [10], homogeneous precipitation [5], thermal decomposition [11], microwave heating [12], conventional hydrothermal [13][14][15], etc. Compared with the conventional heating methods, the microwave heating has many advantages of developing small particles of metal oxides with nano or micro sizes and better purity in short time [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Effect of reducing agents on the structure of zinc oxide under microwave irradiation

2013

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Zinc oxide was synthesized from zinc sulphate using different reducing agents under microwave irradiation. The influence of sodium borohydride, hydrazine hydrate and urea on the shape and size of the products were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). SEM showed the nano-sized spherical and rectangular shaped structures in case of sodium borohydride and hydrazine hydrate, whereas micro-sized hexagonal structures were formed in case of urea under the same irradiation power. The reducing agents played an important role in forming the various structures. Thus different shapes and size of structures were produced by only varying the reducing agent, which had wide applications in various fields.

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Section: Introductionmentioning

confidence: 99%

Effect of reducing agents on the structure of zinc oxide under microwave irradiation

2013

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“…Accordingly, it should be possible to take advantage of microwave irradiation to selectively activate the surface of a substrate, whether it is a flat substrate or a curved particle, and to deposit another material on top of it. As a matter of fact, several papers reported the microwaveassisted solution deposition of metal oxides such as indium tin oxide [40], ZnO [41], TiO 2 [42], BaWO 4 [43], or Eu:YVO 4 [44], on conducting glass substrates or silicon. Also core-shell nanoparticles have been prepared in the microwave by coating preformed nanoparticles with another material, e.g., CdTe/CdS [45], or Au@Ag [46].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous formation of ferrite nanocrystals and deposition of thin films via a microwave-assisted nonaqueous sol–gel process

Bilecka

Kubli

Amstad

et al. 2010

J Sol-Gel Sci Technol

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Combination of the surfactant-free nonaqueous sol-gel approach with the microwave technique makes it possible to synthesize Fe 3 O 4 , CoFe 2 O 4 , MnFe 2 O 4 , and NiFe 2 O 4 nanoparticles of about 5-6 nm and with high crystallinity and good morphological uniformity. The synthesis involves the reaction of metal acetates or acetylacetonates as precursors with benzyl alcohol at 170°C under microwave irradiation of 12 min. Immersion of glass substrates in the reaction solution results in the deposition of homogeneous metal ferrite films whose thickness can be adjusted through the precursor concentration. If preformed nickel nanoparticles are used as a type of curved substrate, the ferrite nanoparticles coat the seeds and form core-shell structures. These results extend the microwave-assisted nonaqueous sol-gel approach beyond the simple synthesis of nanoparticles to the preparation of thin films on flat or curved substrates.

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“…This radical, as detailed by Hosseini et al (2007), is in resonance with radical structures in o-and p-positions [24] and becomes the starting point for the formation of different intermediates. More hydroxylated compounds such as catechol, hydroquinone, benzoquinone or hydroxyl hydroquinone are then produced from subsequent reactions of the intermediates with •OH [25]. So, the degradation rate are less than the synthetic RFCC wastewater.…”

Section: Uv/h2o2/o3 Processmentioning

confidence: 99%

Advanced Oxidation Processes (AOPs) for Refinery Wastewater Treatment Contains High Phenol Concentration

Azizah

Widiasa

2018

MATEC Web Conf.

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Abstract. Petroleum Refinery wastewater is characterized by a high phenol content. Phenol is toxic and resistant to biological processes for treatment of the petroleum refinery wastewater. The combination of an AOP and a biological process can be used for treatment of the refinery wastewater. It is necessary to conduct a study to determine the appropriate condition of AOP to meet the phenol removal level. Two AOP configurations were investigated: H2O2 / UV and H2O2 / UV / O3. From each process samples, COD, phenol and pH were measured. The oxidation was carried out until the targeted phenol concentration of treated effluent were obtained. The better result obtained by using process H2O2 / UV / O3 with the H2O2 concentration 1000 ppm. After 120 minutes, the final target has been achieved in which phenol concentration of 37.5 mg/L or phenol degradation of 93.75%.

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Nanostructured zinc oxide films grown from microwave activated aqueous solutions

Cited by 60 publications

References 34 publications

Effect of reducing agents on the structure of zinc oxide under microwave irradiation

Effect of reducing agents on the structure of zinc oxide under microwave irradiation

Simultaneous formation of ferrite nanocrystals and deposition of thin films via a microwave-assisted nonaqueous sol–gel process

Advanced Oxidation Processes (AOPs) for Refinery Wastewater Treatment Contains High Phenol Concentration

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