Microwave-enhanced catalytic degradation of phenol over nickel oxide

Lai, Teh-Long; Lee, Chia-Chan; Wu, Kuen-Shian; Shu, Youn‐Yuen; Wang, Chen-Bin

doi:10.1016/j.apcatb.2006.07.023

Cited by 94 publications

(38 citation statements)

References 23 publications

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“…From the mass loss between the 100 and 800 C, attributed to the carbon deposition, the carbon/coke deposition was severer in the 200 °C-spent catalyst than the 300 °C-spent Ni 10% /Zeolite, which is in a good agreement with the amount of SR yields being higher at the 200 °C test (9.3 (±2.3) wt.%) than at the 300 °C test (0.2 wt.%) as presented previously in Table 4 In addition, strong XRD diffraction peaks of reduced Ni metal (face-centered cubic crystalline structure) were also observed at 2θ = 44.5° and 51.9° (Lai et al, 2006).…”

Section: Analysis Of Gaseous Productssupporting

confidence: 71%

Reductive de-polymerization of kraft lignin for chemicals and fuels using formic acid as an in-situ hydrogen source

Huang

Mahmood

Tymchyshyn

et al. 2014

Bioresource Technology

101

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Section: Analysis Of Gaseous Productssupporting

confidence: 71%

Reductive de-polymerization of kraft lignin for chemicals and fuels using formic acid as an in-situ hydrogen source

Huang

Mahmood

Tymchyshyn

et al. 2014

Bioresource Technology

101

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“…Lai et al [22] demonstrated that microwave irradiation enhances the catalytic degradation of phenol over nickel oxide, while Horikoshi et al [23] showed that the simultaneous irradiation by UV light and microwaves in the presence of TiO 2 was superior for the degradation of the Rhodamine-B dye compared to the photocatalytic degradation by UV irradiation TiO 2 alone. In addition, there is strong ESR evidence [24] for the production of OH radicals during MW irradiation.…”

Section: Introductionmentioning

confidence: 98%

Kinetics of microwave-enhanced oxidation of phenol by hydrogen peroxide

Zhao

Cheng

Hoffmann

2010

Front. Environ. Sci. Eng. China

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Aqueous solutions of phenol were oxidized by hydrogen peroxide assisted by microwave (MW) irradiation. A simple kinetic model for the overall degradation of phenol in the presence of excess H 2 O 2 is proposed in which the degradation rate of phenol is expressed as a linear function of the concentrations of phenol and H 2 O 2 . A detailed parametric study showed that the degradation rate of phenol increased with increasing [H 2 O 2 ] until saturation was observed. Phenol degradation followed apparent zero-order kinetics under MW radiation or H 2 O 2 oxidation. However, after 90 min of irradiation, the observed kinetics shifted to pseudo first order. The overall reaction rates were significantly enhanced in the combined MW/H 2 O 2 system, mainly because microwave could accelerate H 2 O 2 to generate hydroxyl radical ( $ OH) and other reactive oxygen intermediates. The observed synergetic effects of the MW/H 2 O 2 process resulted in an increased in the net reaction rate by a factor of 5.75. When hydrogen peroxide is present in a large stoichiometric excess, the time required to achieve complete mineralization is reduced significantly.

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“…Another important application of NiO is in battery systems [12,13]. Non-stoichiometric nickel o xide is a good P-type semiconductor owing to its defect structure [14], a potential gas sensor for H 2 [ 15] and high active in the degradation of phenol and phenolic derivatives [16]. These applications can be enhanced by decreasing the particle size (preferably to less than 20 n m) and are highly dependent on particle size; the precise control of the size and distribution in a nanometer region is required.…”

Section: Introductionmentioning

confidence: 99%

Chemical Capping Synthesis of Nickel Oxide Nanoparticles and their Characterizations Studies

Rifaya¹,

Thirugnanasambandan²,

Alagar³

2012

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This work reports aspect related to chemical capping synthesis of nano-sized particles of nickel o xide. It is a simp le, novel and cost effective method. The average particle size, specific surface area, crystallin ity index are estimated fro m XRD analysis. The structural, functional groups and optical characters are analyzed with using of SEM, FTIR and UV-visib le techniques. XRD studies confirm the p resence of high degree of crystallin ity nature of nickel o xide nanoparticles. Their particle size is found to be 12 n m and specific surface area (SSA) is 74m2 g-1. The optical band gap energy value 3.83ev has also been determined fro m UV-Vis spectrum.

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Microwave-enhanced catalytic degradation of phenol over nickel oxide

Cited by 94 publications

References 23 publications

Reductive de-polymerization of kraft lignin for chemicals and fuels using formic acid as an in-situ hydrogen source

Reductive de-polymerization of kraft lignin for chemicals and fuels using formic acid as an in-situ hydrogen source

Kinetics of microwave-enhanced oxidation of phenol by hydrogen peroxide

Chemical Capping Synthesis of Nickel Oxide Nanoparticles and their Characterizations Studies

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