Preparation of mesoporous Fe2O3·SiO2 composite from rice husk as an efficient heterogeneous Fenton-like catalyst for degradation of organic dyes

Vu, Anh Tuan; Xuan, Truong Nguyen; Lee, Chang Ha

doi:10.1016/j.jwpe.2019.01.019

Cited by 74 publications

(32 citation statements)

References 51 publications

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“…The catalytic performance for degradation of JGB in the as-synthesized Ag•ZnO•AC composite was compared with different catalysts from recent literatures [6,23,42,43]. sThe reaction condition and degradation efficiency of these catalysts are listed in Table 3.…”

Section: The Degradation Of Other Dyes and Organic Compounds And Compmentioning

confidence: 99%

“…The disappearance of the absorbance peak at 611 nm with the reaction time could stem from the fragmentation of the azo links by oxidation [44]. The decrease in intensity of band at 393 nm could be attributed to breaking the -N-Cbond [23]. In addition to this rapid degradation, the decay of the absorbance at 288 nm was considered as the evidence of degradation of aromatic fragments in the dye molecule and its intermediates.…”

Section: Reaction Mechanismmentioning

confidence: 99%

“…The bulk density of RH is approximately 100-122 kg/m 3 , containing about 15-28 wt% of silica and 72-85 wt% of lignocellulose [21,22]. Therefore, to utilize RH properly, the studies to convert RH into silica or activated carbon have been widely performed [1,[23][24][25]. Then, the developed porous material has been attracted for the great attention of water purification technology.…”

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confidence: 99%

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Synthesis of Nano-Flakes Ag•ZnO•Activated Carbon Composite from Rice Husk as A Photocatalyst under Solar Light

Pham

Tran

et al. 2020

Bull. Chem. React. Eng. Catal.

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This study aimed to synthesize Ag•ZnO•Activated carbon (Ag•ZnO•AC ) composite from rice husk for degradation of dyes. The deposition of Ag and ZnO on AC led to decreasing the surface area and pore volume of Ag•ZnO•AC composite. In addition, when Ag and ZnO were dispersed on activated carbon, the Ag•ZnO flakes became denser and tighter, but the particle size of Ag became smaller from 5 to 7 nm. The photocatalytic ability of Ag•ZnO•AC composite was evaluated by degradation of Janus Green B (JGB) and compared with that of AC, ZnO, Ag•ZnO, and ZnO•AC samples. The effects of catalyst dosages, pH values, and initial dye concentrations on photocatalytic degradation were investigated in detail. The Ag•ZnO•AC composite had a high degradation efficiency of 100% in 60 min, showing the reaction rate of 0.120 min-1 and degradation capacity of 17.8 mg/g within 20 min. The photocatalytic performance of the Ag•ZnO•AC composite was also evaluated by cyclic test and the degradation of other persistent dyes such as Methylene Blue, Tartrazine, Congo Red, and organic compounds (Caffeine and Bisphenol A). Based on the experimental results, the possible destruction route of JGB by the as-synthesized Ag•ZnO•AC composite was suggested. Copyright © 2020 BCREC Group. All rights reserved

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Section: The Degradation Of Other Dyes and Organic Compounds And Compmentioning

confidence: 99%

Section: Reaction Mechanismmentioning

confidence: 99%

mentioning

confidence: 99%

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Synthesis of Nano-Flakes Ag•ZnO•Activated Carbon Composite from Rice Husk as A Photocatalyst under Solar Light

Pham

Tran

et al. 2020

Bull. Chem. React. Eng. Catal.

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“…The broad peak at 20º was assigned to amorphous silica. [5] Figure 2(e) presents the N2 adsorption/desorption isotherm and pore size distribution of as-prepared silica. According to UIPAC classification, the silica sample showed a type IV with a type H1 hysteresis loop, indicating mesoporous structure with a well-defined cylindricallike pore channels inside.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

“…RH contains about 75 wt.% of volatile organic compounds, which will be burned during combustion, and remained contents (25 wt.%) will turn into ash. [5] Rice husk ash (RHA) contains over 80 wt.% of silica. RH has been used to prepare porous silica and it composites by directed extraction of silica form rice husk, burning the rice husk at high temperature (> 500 o C), and impregnation methods.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of mesoporous SiO₂ from rice husk for removal of organic dyes in aqueous solution

Thu

Dat

Tuấn

2019

Vietnam Journal of Chemistry

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Mesoporous SiO2 was prepared from rice husk for removal of methylene blue (MB) from aqueous solution. Asprepared SiO2 was characterized by FE-SEM, TEM, XRD, FT-IR and N2 adsorption/desorption isotherm. The effects of SiO2 dosage and contact time on adsorption of dye were investigated. The optimal dosage of SiO2 for removing methylene blue was 0.05 g and the removal efficiency of methylene blue reached to 91.9 % after 50 min of adsorption. The adsorption kinetic of methylene blue was studied to understand the mechanism of adsorption process. The kinetic data was analyzed by pseudo-first-order, pseudo-second-order, and intra-particle diffusion models. The results showed that rate of adsorption dye followed pseudo-second-model with a good regression correlation (R 2 = 0.999), the value of rate constant for adsorption process was calculated as 0.017 (g.mg -1 .min -1 ) and film diffusion was the rate limiting step. In addition, the cyclic test for as-prepared SiO2 was investigated and the removal efficiency was remained at 80.2% at 3 rd cyclic experiment.

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Iron-Based Nanomaterials for Fenton Reaction

Guidolin

Cechinel

Arcaro

2021

Environmental Applications of Nanomaterials

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Preparation of mesoporous Fe2O3·SiO2 composite from rice husk as an efficient heterogeneous Fenton-like catalyst for degradation of organic dyes

Cited by 74 publications

References 51 publications

Synthesis of Nano-Flakes Ag•ZnO•Activated Carbon Composite from Rice Husk as A Photocatalyst under Solar Light

Synthesis of Nano-Flakes Ag•ZnO•Activated Carbon Composite from Rice Husk as A Photocatalyst under Solar Light

Synthesis of mesoporous SiO₂ from rice husk for removal of organic dyes in aqueous solution

Iron-Based Nanomaterials for Fenton Reaction

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Preparation of mesoporous Fe2O3·SiO2 composite from rice husk as an efficient heterogeneous Fenton-like catalyst for degradation of organic dyes

Cited by 74 publications

References 51 publications

Synthesis of Nano-Flakes Ag•ZnO•Activated Carbon Composite from Rice Husk as A Photocatalyst under Solar Light

Synthesis of Nano-Flakes Ag•ZnO•Activated Carbon Composite from Rice Husk as A Photocatalyst under Solar Light

Synthesis of mesoporous SiO2 from rice husk for removal of organic dyes in aqueous solution

Iron-Based Nanomaterials for Fenton Reaction

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Product

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Synthesis of mesoporous SiO₂ from rice husk for removal of organic dyes in aqueous solution