Deposition and Characterization of Silver Oxide from Silver Solution Recovered from Industrial Wastes

Ekpunobi, Uchenna; K., Okwukogu, O.; Anozie, A. I.; Ogbuagu, A. S.; Ajiwe, Vincent Ishmael Egbulefu; Nweze, Christian

doi:10.9734/acsj/2013/3214

Cited by 8 publications

(4 citation statements)

References 10 publications

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“…It is important to note that, in the Ag 2 O compound, the Ag 3d5/2 core level binding energy in the range 367.6-367.8 eV and O 1 s were in the range 529.2-529.5 eV, while in pure metallic silver was in 368.0-368.3 eV range [21].…”

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 98%

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Optoelectronic properties of highly porous silver oxide thin film

et al. 2021

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In this paper, we report oxidation time effect on highly porous silver oxide nanowires thin films fabricated using ultrasonic spray pyrolysis and oxygen plasma etching method. The NW’s morphological, electrical, and optical properties were investigated under different plasma etching periods and the number of deposition cycles. The increase of plasma etching and oxidation time increases the surface roughness of the Ag NWs until it fused to form a porous thin film of silver oxide. AgNWs based thin films were characterized using X-ray diffraction, scanning electron microscope, transmission electron microscope, X-ray photoemission spectroscopy, and UV–Vis spectroscopy techniques. The obtained results indicate the formation of mixed mesoporous Ag2O and AgO NW thin films. The Ag2O phase of silver oxide appears after 300 s of oxidation under the same conditions, while the optical transparency of the thin film decreases as plasma etching time increases. The sheet resistance of the final film is influenced by the oxidation time and the plasma application periodicity. Graphic abstract

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Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 98%

“…Various methods are employed for growing silver oxide thin films, such as thermal oxidation, electron beam evaporation, pulsed laser deposition, chemical vapor deposition (CVD), and DC sputtering [21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Optoelectronic properties of highly porous silver oxide thin film

et al. 2021

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“…Fluida dasar (base fluid) dapat berupa air dan partikel nano berupa logam yakni Ag (Perak). Partikel nano Ag memiliki daya hantar dan tingkat kondutivitas yang tinggi [3]. Adanya pengaruh medan magnet pada Fluida nano Ag-Air, maka menjadi fluida tersebut dapat menghantarkan arus listrik.…”

Section: Pendahuluanunclassified

Pergerakan Aliran MHD Ag-AIR Melewati Bola Pejal

Norasia

Widodo

Adzkiya

2021

LIMITS

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Fluida merupakan zat yang dapat mengalir dan mengalami perubahan secara kontinu akibat adanya tegangan geser. Analisis pengukuran dari ketahanan fluida terhadap tegangan geser menggunakan viskositas. Berdasarkan viskositas, fluida dibagi menjadi dua yaitu fluida newtonian dan fluida nonnewtonian. Fluida non-newtonian terdiri atas fluida viskos, fluida mikropolar dan fluida nano. Salah satu contoh fluida nano adalah Ag-Air. Fluida tersebut tersusun dari fluida dasar air dan partikel nano Ag yang memiliki daya hantar dan tingkat konduktivitas yang tinggi. Adanya pengaruh medan magnet pada Fluida nano Ag-Air, maka menjadi fluida tersebut dapat menghantarkan arus listrik (memiliki sifat magnetohidrodinamik/MHD). Merujuk pada hasil riset sebelumnya bahwa parameter magnetik dan konveksi dapat mempengaruhi profil kecepatan dan temperatur pada fluida. Pada penelitian ini dibahas mengenai model matematika dan penyelesaian numeriknya dari permasalahan pergerakan aliran MHD Ag-Air yang melewati bola pejal dengan pengaruh parameter magnetik dan konveksi. Diperoleh hasil bahwa variasi magnetik yang meningkat mengakibatkan pergerakan Ag-Air melambat dan temperatur Ag-Air meningkat. Dengan meningkatkan parameter konveksi diperoleh pergerakan Ag-Air lebih cepat dan temperatur Ag-Air mengalami penurunan.

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“…This method is the most primitive one and generates undesirable foul smell and causes enormous environmental pollution by producing undesired emissions. The chemical method for silver recovery from X-ray films involves usage of acid and alkali, and thus, it is quite harsh and environmentally hazardous (Marinkovic et al 2006;Ekpunobi et al 2013). Furthermore, the polyester film on which emulsion of silver and gelatin is coated cannot be recovered by these methods.…”

Section: Proteases In Photographic Industrymentioning

confidence: 99%

Potential application spectrum of microbial proteases for clean and green industrial production

Singh

Bajaj

2017

Energ. Ecol. Environ.

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Enzymes are the cornerstones of metabolism and constitute the fundamental basis for existence of life. However, recently enzymes are being implicated in diverse industrial processes because of their specific and fast action for efficient bioconversion of substrate to product, and their capability to save raw materials, energy and chemicals for various manufacturing processes. Enzymes are considered as environment-friendly (green) chemicals that may potentially help replacing completely or reducing the usage of hazardous chemicals for industrial processes, thus promising sustainable production and manufacturing. Among various industrial enzymes microbial proteases dominate the world enzyme market due to their multifaceted application potential in varied bioindustries like food, pharmaceutical, textile, photographic, leather and detergent. Promising applications of proteases in agricultural sector for instance may include biocontrol of pests, degumming of silk, selective delignification of hemp and wool processing. However, for successful industrial applications the proteases must be robust enough to suit the process conditions which are generally hostile. Proteases intended for industrial applications must have activity and stability over wide range of temperature and pH extremes for prolonged time periods and even in the presence of various potential enzyme inhibitors. Of various microbial proteases those from Bacillus spp. have got special significance because the latter are known for their ability to produce sturdy enzymes that might have suitability for industrial process conditions. The current article presents an interpretive summary of the recent developments on application potential of proteases for various industries.

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Deposition and Characterization of Silver Oxide from Silver Solution Recovered from Industrial Wastes

Abstract: Aims: To recover silver from industrial waste and use its solution in silver oxide deposition. Study Design: Extraction, electrodeopsition on different substrates, XRD and topographical characterizations.

Cited by 8 publications

References 10 publications

Optoelectronic properties of highly porous silver oxide thin film

Optoelectronic properties of highly porous silver oxide thin film

Pergerakan Aliran MHD Ag-AIR Melewati Bola Pejal

Potential application spectrum of microbial proteases for clean and green industrial production

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