Electrochemical sensor based on porous silicon/silver nanocomposite for the determination of hydrogen peroxide

Ensafi, Ali A.; Rezaloo, Fatemeh; Rezaei, Behzad

doi:10.1016/j.snb.2016.03.018

Cited by 106 publications

(42 citation statements)

References 23 publications

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“…Silver nanoparticles have been intensively investigated during the past decade in electrochemical sensing of many species like antioxidants, dyes, and drugs and especially hydrogen peroxide . They show diversity of electrochemical and chemical reactions useful for distinguishing various analytes.…”

Section: Introductionmentioning

confidence: 99%

“…For this reason, further efforts in searching new mediators for the Trp detection are needed. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Silver nanoparticles have been intensively investigated during the past decade in electrochemical sensing of many species like antioxidants, dyes, and drugs [21][22][23][24][25] and especially hydrogen peroxide [26][27][28][29]. They show diversity of electrochemical and chemical reactions useful for distinguishing various analytes.…”

Section: Introductionmentioning

confidence: 99%

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Glassy Carbon Electrode Modified with Silver Nanodendrites Implemented in Polylactide‐Thiacalix[4]arene Copolymer for the Electrochemical Determination of Tryptophan

et al. 2017

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Glassy carbon electrode (GCE) was modified by new polymeric materials obtained from oligolactides by cross‐linking with tetracarboxylated thiacalix[4]arene in cone, partial cone and 1,3‐alternate configurations and then silver was deposited by potential cycling in the pores of the polymer film. The modified electrode showed highly sensitive and selective signal toward tryptophan which was irreversibly oxidized on the coating due to Ag+ assisted accumulation in the surface layer. The role of macrocycle configuration and conditions for Ag nanodendrites formation are described. Granulation of the polymer films caused by the macrocycles improves both the conditions for silver deposition and tryptophan determination. The electrochemical sensor developed makes it possible to determine from 0.1 to 100 μM of tryptophan with the limit of detection down to 0.03 μM. No interference with oxidation of other amino acids (phenylalanine, histidine, cysteine and tyrosine) was found. The electrochemical sensor developed was validated in the determination of tryptophan sedative medication “Formula of calmness” in the presence of vitamins B5 and B6.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Glassy Carbon Electrode Modified with Silver Nanodendrites Implemented in Polylactide‐Thiacalix[4]arene Copolymer for the Electrochemical Determination of Tryptophan

et al. 2017

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“…[22][23] As summarized in previous reviews, the electrocatalysts cover metal and alloys (Au, Ag, Pt, Pd, AuAg, [a] Dr. PtPd, RuRh, et al), metal oxides (MnO 2 , TiO 2 , Co 3 O 4 , Fe 3 O 4 , CuO, et al), metal complexes (ferric hexacyanoferrate, metallophthalocyanines, metalloporphyrins, et al), organic and polymeric materials (redox dyes, conductive polymers, et al), carbon nanomaterials (carbon nanotubes, graphene, doped carbon materials, et al), as well as their hybrids with two or more composites. [24][25][26] Recent researches further develop cheap, abundant, easy-accessible materials including transition metal sulfides (TMSs), [27][28][29][30] metal-organic frameworks (MOFs), [31][32][33][34] layered double hydroxides (LDHs), [35][36] metal hydroxides, [37][38] polyoxometalates (POMs), [39][40][41] MXene, [42][43][44] zeolites [45][46][47] black phosphorus, [48][49] and porous silicon [50][51][52][53] based catalysts, et al Some non-enzyme biomaterials, like hemin, G-quadruplex, are also involved in inorganic-organic nanohybrid catalysts.…”

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confidence: 99%

Free‐Standing 3D Electrodes for Electrochemical Detection of Hydrogen Peroxide

et al. 2019

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Electrochemical detection of hydrogen peroxide has achieved rapid development, due to the wide presence in industrial production, everyday life, bioprocess and green energy chemistry, etc. Many three‐dimensional structures have emerged as state‐of‐the‐art electrocatalysts due to their fascinating structures and electrochemical properties. This review summarizes free‐standing three‐dimensional electrocatalysts based on metal, metal oxide, carbon & silicon, and unconventional materials for detection of hydrogen peroxide with low limit of detection, wide range and fast response. The work also highlights their applications in near neutral conditions, especially their ability for single cell detection and mapping in biological environment. Further exploration into these materials together with devices design will facilitate the development of next‐generation detection technologies toward in situ and real‐time detection and contribute to wearable/portable smart detection electronics.

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“…27‐1402) . However in case of Ag/PSi sample beside Si phase peaks, appearance of four additional peaks at 2 θ = 38.17°, 44.33°, 64.3° and 77.5° can be very well indexed to (111), (200), (220) and (311) planes of face centered cubic phase (fcc) of silver respectively confirming the presence of Ag in newly formed modified structure. As also revealed, the obtained diffraction patterns of all XRD peaks are very sharp indicating the well crystalline nature of prepared samples.…”

Section: Resultsmentioning

confidence: 84%

Enhanced photocatalytic reduction of Cr(VI) on silver nanoparticles modified mesoporous silicon under visible light

et al. 2019

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The development of visible‐light photocatalysts with desirable material characteristics and efficient performance is an existing challenge for photocatalysis community. Herein, we report on the synthesis of silver nanoparticles (AgNPs) modified porous silicon (PSi) nanopowder and its effective use in the photo‐reduction of hexavalent chromium Cr(VI) to trivalent Cr(III) under direct visible light irradiation in the presence of citric acid. The PSi was prepared via simple stain etching of Si microparticles in HF/HNO3 aqueous solution, followed by the deposition of AgNPs onto PSi by the immersion plating technique. The developed photocatalyst composed of PSi with <20 nm mesoporous structure, decorated with crystalline 15‐50 nm AgNPs. Photocatalytic experiments using unmodified Si microparticles, either PSi or sonicated one, indicated inactive catalytic behavior toward the photo‐reduction of Cr(VI). Remarkable photo‐reduction efficiency (97.4%) was achieved after 180 minutes irradiation using the AgNPs/PSi sample. The efficient photo‐reduction capability of AgNPs/PSi photocatalyst is attributed to the enhanced separation between photo‐generated electrons and holes (e−‐h+) enabling better utilization of light, as revealed from the photoluminescence measurement. Additionally, the presence of citric acid in solution promoted greatly the photo‐reduction reaction as it acted as a hole scavenger, suppressing further the rate of e−‐h+ recombination through rapid consumption of photo‐generated holes. Excellent reusability of the current photocatalyst was evidenced by performing cyclic five runs with minimal reactivity loss. Results of synthesis, characterization, photocatalytic activity and reaction mechanism are thoroughly addressed and discussed.

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Electrochemical sensor based on porous silicon/silver nanocomposite for the determination of hydrogen peroxide

Cited by 106 publications

References 23 publications

Glassy Carbon Electrode Modified with Silver Nanodendrites Implemented in Polylactide‐Thiacalix[4]arene Copolymer for the Electrochemical Determination of Tryptophan

Glassy Carbon Electrode Modified with Silver Nanodendrites Implemented in Polylactide‐Thiacalix[4]arene Copolymer for the Electrochemical Determination of Tryptophan

Free‐Standing 3D Electrodes for Electrochemical Detection of Hydrogen Peroxide

Enhanced photocatalytic reduction of Cr(VI) on silver nanoparticles modified mesoporous silicon under visible light

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