Ag Nanoparticles-Based Zinc Hydroxide-Layered Hybrids as Novel and Efficient Catalysts for Reduction of 4-Nitrophenol to 4-Aminophenol

Quites, Fernando Júnior; Azevedo, Camila K. S.; Alves, Everton P. P.; Germino, José Carlos; Vinhas, Rita C. G.; Landers, Richard; Terezo, Ailton José; Atvars, Teresa Dib Zambon

doi:10.5935/0103-5053.20160152

Cited by 8 publications

(3 citation statements)

References 30 publications

(118 reference statements)

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“…Further, calculation of the turn over frequency (TOF) is a crucial factor to access the catalytic activity, which is determined by dividing the concentration of 4‐NP with the amount of catalyst used and reaction time . The TOF of present catalyst is found to be 154.32 h −1 , which is greater than other nano silver–based hybrid materials …”

Section: Resultsmentioning

confidence: 95%

Nano silver imprinted graphene oxide as catalyst in reduction of 4‐nitrophenol

Sahu

Sarkar

Sahoo

et al. 2019

J of Physical Organic Chem

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Herein, a low-cost and eco-friendly approach is adopted for the synthesis of L-cysteine-assisted silver/reduced graphene oxide (L-cys-rGO/Ag) nanocomposites using sodium citrate as reducing agent. The morphology of graphene oxide (GO) and L-cys-rGO/Ag nanocomposites are studied by scanning electron microscope (SEM). The strong interactions of rGO/Ag with L-cysteine are established by Fourier transferred infrared (FTIR) study. The average diameter of dispersed Ag NPs is 40 to 70 nm, which is evidenced by transmission electron microscope (TEM). In the preparation of L-cys-rGO/Ag nanocomposites, both GO and L-cysteine are used as supporting and stabilising media to avoid the unexpected agglomeration in the in situ formed Ag NPs and to get high surface area in the nanocomposites. The excellent behaviour of L-cys-rGO/Ag nanocomposites acting as a heterogeneous catalyst for the conversion of 4-nitrophenol to 4-aminophenol with NaBH 4 is achieved that is due to the high adsorption of reactant on the surface rGO and more transfers of electron from rGO to Ag NPs. Beside this, Lcys-rGO/Ag nanocatalyst can be reused several times with negligible loss of catalytic efficiency. Further, the as-synthesised nanocomposites show good antioxidant behaviour.

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Section: Resultsmentioning

confidence: 95%

Nano silver imprinted graphene oxide as catalyst in reduction of 4‐nitrophenol

Sahu

Sarkar

Sahoo

et al. 2019

J of Physical Organic Chem

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“…Berdasarkan penelitian Gu et al, 2014 (12) terdapat informasi bahwa terdapat dua hingga tiga trend pada penurunan konsentrasi 4-nitrofenol yaitu penundaan reaksi seperti pada waktu 0 hingga 400 detik pada dosis 15 μL dan 0 hingga 100 detik pada 30 μL, kemudian trend penurunan seperti pada 0 hingga 1000 detik pada dosis 50 μL . Trend penurunan absorbansi pada 401 nm akan digunakan untuk mencari tetapan laju reduksi sesuai persamaan berikut ini (11,13).…”

Section: [Jurusan Kimia Fmipa Universitas Bengkulu]unclassified

Reduksi Katalitik 4-Nitrofenol dengan Katalis Nanopartikel Perak Terkonjugasi L-Lisine

Alfanaar

Afthoni

2021

rjna

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Nanopartikel perak berpotensi menjadi katalis homogen dalam reduksi 4-nitrofenol menjadi 4-aminofenol. Berbagai penelitian menunjukan L-lisine berpotensi bertindak sebagai agen penstabil nanopartikel perak sehingga mempengaruhi sifat katalitik nanopartikel perak. Pada penelitian ini dilakukan reduksi 4-nitrofenol menggunakan katalis nanopartikel perak yang terkonjugasi dengan L-lisini dengan reduktor NaBH4. Dari hasil reduksi didapatkan nanopartikel perak dengan dosis 50 ?L mampu mengubah 99,99% 4-nitrofenol menjadi 4-aminofenol dengan tetapan laju reaksi 0,1130 menit-1.

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“…In this aspect, the reduction of organic nitro derivatives into amine derivatives has been attracting significant attention. There are a huge number of heterogeneous catalysts that are reported for the reduction of nitrophenol to aminophenol [7][8][9][10][11][12][13][14][15][16], etc. However, each method has its downside such as separation of chemicals, calcination to activate catalysts, number 2 Experimental section…”

Section: Introductionmentioning

confidence: 99%

Polyoxometalate functionalized matrix material: synthesis, characterization, reductive and thermal degradation kinetics

Sabarinathan¹,

Vijayakumar

Arumuganathan³

2020

SN Appl. Sci.

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One-pot synthesis of polyoxometalate (POM) based hybrid material 1 was synthesized by mixing copper nitrate, silicomolybdic acid and urea under hydrothermal condition. The reduction ability of 1 was examined by employing 2,4,6-trinitrophenol (2,4,6-TNP) and 4-nitrophenol (4-NP) in the presence of sodium borohydride in water. The catalytic reduction into the corresponding amine was monitored by UV-Visible spectroscopy. The rate and order of catalytic reduction were studied through chemical kinetics and follows pseudo-first-order. The efficiency of the catalyst was investigated by employing used catalyst 1 for at least ten cycles. Leaching experiments and performance of the reusability of catalyst were supported by FT-IR analyses. In addition, the electrochemical reduction ability of catalyst 1 was also executed by Cyclic Voltammetry (CV). Catalyst 1 was characterized by Fourier-Transform Infrared spectroscopy (FT-IR), Powder X-ray diffraction (PXRD), UV-Diffused Reflectance (UV DRS), Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDX), X-ray Photoelectron Spectroscopy (XPS), and Bruner-Emmet-Teller analyses (BET). Solid-state decomposition kinetics of 1 was performed from Thermogravimetric Analysis (TGA) data by fitting into model equations such as Flynn-Wall-Ozawa (FWO) and corrected (C-FWO).of steps in synthesis, reporting with a lower yield, specific and selectivity, etc. [17]. Copious reports were available with gracious metals such as Pd and Pt catalysts, however, the expensive nature of such metals restrict the common usage [18,19]. Hence, the development of a novel simple methodology for the reductive conversion with selectivity is currently required research area [20]. In this present work, we adopt the simple one-pot synthesis route of title compound by hydrothermal technique.The Polyoxometalates (POM) are metal-oxo clusters of molybdenum, tungsten, and vanadium, etc. attracting considerable interest because of their versatility [21]. The POMs are well known for their usage in multiple fields such as medicine, electronics, magnetism, optics [22], conductance, supramolecular chemistry [23], adsorption [24], antitumor [25], anti-cancer [26], anti-bacterial [27] and catalysis etc. [28]. Usage of POM cluster as a catalyst along with transition metal support in the form of matrix composite could have an added advantage over to either as bare transition metals/plain POM treatment like controlled oxidation, deactivation in air, stopping magnetically induced aggregation, etc. [29][30][31]. It is worth mentioning that in the presence of NaBH 4 the POM has been reported as an efficient reductive catalyst as the reduction concern [32]. In this present work, we report a novel inorganic-organic hybrid composite POM-hybrid (1) material isolated in situ and applied as a reductive catalyst for aromatic nitrophenol derivatives in an aqueous medium.

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Ag Nanoparticles-Based Zinc Hydroxide-Layered Hybrids as Novel and Efficient Catalysts for Reduction of 4-Nitrophenol to 4-Aminophenol

Cited by 8 publications

References 30 publications

Nano silver imprinted graphene oxide as catalyst in reduction of 4‐nitrophenol

Nano silver imprinted graphene oxide as catalyst in reduction of 4‐nitrophenol

Reduksi Katalitik 4-Nitrofenol dengan Katalis Nanopartikel Perak Terkonjugasi L-Lisine

Polyoxometalate functionalized matrix material: synthesis, characterization, reductive and thermal degradation kinetics

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