Synthesis of metal oxide nanoparticles (CuO and ZnO NPs) via biological template and their optical sensor applications

Maruthupandy, Muthuchamy; Zuo, Yong; Chen, Jingshuai; Song, Ji‐Ming; Niu, Helin; Zhang, Shengyi; Shen, Yuhua

doi:10.1016/j.apsusc.2016.11.118

Cited by 107 publications

(28 citation statements)

References 37 publications

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“…Several nanomaterials (NMs) including graphene, carbon nanotubes (CNTs), metal-oxide nanowires (NWs) have recently emerged as intriguing points of research in multidisciplinary fields, since these NMs exhibit enhanced structural, electrical, and optical properties [1][2][3][4][5][6][7][8][9]. Thus, they may serve as promising sources of innovation in space applications.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical Characteristics of Nanocomposites under Environmental Exposure Conditions for Space Applications

Hee¹,

S²,

M³

et al. 2019

Int J Nanoparticles Nanotech

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Despite well-perceived advancements of nanotechnology for space applications, application of nanotechnology in the aerospace industry has potential challenges in the perspectives of monitoring and accurately measuring types and levels of pollution. Nanomaterials applied for chemical nanosensors should be well characterized and designed to detect contaminant levels different from Earth's. However, a few studies have investigated the transformation and efficacy of aged nanomaterials in sensor development. The present study explored the aging effect of oxygenation, UV irradiation, and heat treatment on selected nanomaterials (i.e., GO, CNTs, ZnO nanowire, TiO 2 , and ZnO) in the perspective of sensing performance to detect trace contaminants. Further, GO-CNT nanocomposite thin films deposited on electrode chips were exposed to the CO 2 gas contaminant, and their electrical resistance was measured. Results indicate significant changes in physicochemical properties (particle size, zeta potential, and absorbance) of the model nanomaterials under oxygenation and UV irradiation, which was further investigated on their electric resistance upon exposure to gaseous contaminants. The assessment of changes to the CO 2-sensing ability of carbon-nanotube or graphene-oxide hybrid thin films suggests decreasing sensitivity under both UV irradiation and oxygenation.

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Section: Introductionmentioning

confidence: 99%

Physicochemical Characteristics of Nanocomposites under Environmental Exposure Conditions for Space Applications

Hee¹,

S²,

M³

et al. 2019

Int J Nanoparticles Nanotech

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“…0.10 M NaOH aqueous solution of three hundred microliters was titrated at the rate of 1 mL/h. Carbonate salt formation was minimized, by titrating under nitrogen flow condition (Maruthupandy et al 2017). To free the content from NO 3 − ions, precipitate centrifugation and washing were carried out.…”

Section: Synthesis Of Copper Oxide-rbh Kaolinite Compositementioning

confidence: 99%

“…These factors include metal speciation, metal mobility, sizes of adsorbent, adsorbent surface charge, adsorbent surface area, and chemistry of proton-metal ratio (Arancibia-Miranda et al 2016). The contact time and pH are regulating factors in the hydrolysis of Lead ions and species solubility (Zhengn et al 2018;Maruthupandy et al 2017;Kuncoro et al 2018). These parameters enhance the reorganization of reactive sites (Wang et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of kaolinite coated with copper oxide and its effect on the removal of aqueous Lead(II) ions

et al. 2019

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The removal of Lead (Pb 2+) ions from waste water in the aquatic environment by copper oxide-kaolinite composite forms an important step involved in the reduction of Lead ions in the environment. The study investigated the synthesis, characterization, and application of copper oxide-kaolinite composite in the removal of Lead ions from aqueous systems. The synthesis of the composite involved a trimetric process to produce the copper oxide (CuO)-kaolinite composite. The characterization involved the determination of cation exchange capacity, specific surface area, and spectral analysis by sodium saturation method, nitrogen gas adsorption techniques, and scanning electron spectroscopy, respectively. The determination of parameters affecting the reaction mechanism and reaction kinetics involved the use of batch mode techniques. The findings indicated a reaction mechanism that was less than one proton coefficient, higher mass transfer rates when compared with uncoated kaolinite. Here, the intraparticle diffusion was higher than the value for the uncoated kaolinite. The reactions based on Pb 2+ initial concentration indicated that the coated kaolinite gradually became saturated as the concentration was increased. The reactions based on solid concentration (Cp) demonstrated a complex change in the capacity of adsorption over different Pb 2+ concentrations (10-40 mgL −1) and solid concentrations (2-10 gL −1). Here, the reduction in specific surface area, particle size increase, mineral aggregation, and concentration gradient effect controlled the complex changes in adsorption. In conclusion, the copper oxide-kaolinite composite significantly enhanced the adsorption of Pb 2+ ions.

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“…Metal oxides are known to be used in many electrochemicalbased devices such as gas sensor, biosensor, and chemical sensor [1], optical sensors [2], lithium ion batteries [3], photoanodes [4], and environmental remediation photocatalysts [5]. A group of bismuth inorganic compounds such as Bi 2 O 3 , BiVO 4 , BIMEVOX, BiMoO 6 , BiOCl, and Bi 2 WO 6 are known to act as electrode materials, exhibiting high electrical capacity, chemical stability under multiple polarization cycles, photoelectroactivity, and photocatalytical properties [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Does the low optical band gap of yellow Bi3YO6 guarantee the photocatalytical activity under visible light illumination?

Trzciński

Szkoda

Herman

et al. 2018

J Solid State Electrochem

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Bi 3 YO 6 , which is known as an ionic conductor, was tested here as an electrode and photoanode in contact with aqueous electrolytes. Bi 3 YO 6 was deposited onto the Pt substrate and the such prepared electrode was polarized in various aqueous electrolytes. The optical energy band gap of the material equal to 1.89 eV was determined using the Kubelka-Munk function resulting from the UV-Vis spectrum (allowed indirect transition) and also was calculated using the semi-empirical PM7 method (3.38 eV of HOMO-LUMO energy gap). Despite the yellow color of Bi 3 YO 6 , the tested material exhibits photoelectroactivity only in the UV range of electromagnetic radiation. The anodic photocurrent characteristic for n-type metal oxide semiconductors was recorded. The electrode exhibits diffusion-controlled cathodic activity while polarized in chloride-free aqueous electrolytes.

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Synthesis of metal oxide nanoparticles (CuO and ZnO NPs) via biological template and their optical sensor applications

Cited by 107 publications

References 37 publications

Physicochemical Characteristics of Nanocomposites under Environmental Exposure Conditions for Space Applications

Physicochemical Characteristics of Nanocomposites under Environmental Exposure Conditions for Space Applications

Synthesis and characterization of kaolinite coated with copper oxide and its effect on the removal of aqueous Lead(II) ions

Does the low optical band gap of yellow Bi3YO6 guarantee the photocatalytical activity under visible light illumination?

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