Investigation on SiO2 derived from sugarcane bagasse ash and pumice stone as a catalyst support for silver metal in the 4-nitrophenol reduction reaction

Nurwahid, Imam Hidayat; Dimonti, Lizbeth Cantik Christina; Dwiatmoko, Adid Adep; Ha, Jeong‐Myeong; Yunarti, Rika Tri

doi:10.1016/j.inoche.2021.109098

Cited by 12 publications

(2 citation statements)

References 60 publications

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“…From this figure, a broad peak can be seen, which is attributed to the amorphous SiO 2 of raw pumice and appears between 20 °and 30 °(2θ) (Azad et al, 2020;Nurwahid et al, 2022). The appearance of a similar broad peak in all other spectra indicates that the dye adsorption did not cause any significant deformation of the crystallographic structure of the pumice and that the adsorption took place at the surface.…”

Section: Microscopic and Spectroscopic Analyzesmentioning

confidence: 75%

Investigation of the removal kinetics, thermodynamics and adsorption mechanism of anionic textile dye, Remazol Red RB, with powder pumice, a sustainable adsorbent from waste water

et al. 2023

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Excessive growth and abnormal use of dyes and water in the textile industry cause serious environmental problems, especially with excessive pollution of water bodies. Adsorption is an attractive, feasible, low-cost, highly efficient and sustainable technique in terms of green chemistry for the removal of pollutants from water. This study aims to investigate the removal kinetics, thermodynamics and adsorption mechanism of Remazol Red RB, which was chosen as a representative anionic reactive dye, from synthetic wastewater using powdered pumice, taking into account various experimental parameters such as initial dye concentration, adsorption time, temperature and pH. Moreover, to support the proposed adsorption mechanism, before and after adsorption of the samples, the Fourier transform infrared spectrophotometer (FTIR) spectra, X-ray powder diffraction (XRD) diffractograms and High resolution transmission electron microscopy (HRTEM) images were also taken and used. The results show that powder pumice can be an efficient adsorbent for anionic dye removal with a relatively high adsorption capacity of 38.90 mg/g, and it is very effective in 30–60 min in mild conditions. The experimental data showed a high agreement with the pseudo-second-order kinetic model and the Freundlich adsorption isotherm equation. In addition, thermodynamically, the process exhibited exothermic nature and standard isosteric enthalpy and entropy changes of −4.93 kJ/mol and 16.11 J/mol. K were calculated. It was determined that the adsorption mechanism was predominantly based on T-shaped pi-pi interactions and had physical characteristics.

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Section: Microscopic and Spectroscopic Analyzesmentioning

confidence: 75%

Investigation of the removal kinetics, thermodynamics and adsorption mechanism of anionic textile dye, Remazol Red RB, with powder pumice, a sustainable adsorbent from waste water

et al. 2023

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“…The solution of this compound was clear. Then, the addition of NaBH4 to the p-NP solution resulted in a deprotonation reaction and the formation of nitrophenolate ions (yellow solution), as indicated by a new peak at 401 nm (Figure 4b) (Nurwahid et al, 2022;Hou et al, 2016). The Ag@OPLA600 composite helped deliver hydrogen ions from NaBH4 to the nitro group in the p-nitrophenolate ion structure.…”

Section: Composite Applicationmentioning

confidence: 99%

Fabrication of Silver-Silica Composite using the Carbo-thermal Degradation of Oil Palm Leaves for the Reduction of p-nitrophenol

S¹,

Charles²,

Falahudin³

et al. 2023

IJTech

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Oil palm leaves are natural sources of bio-silica. In situ carbothermal degradation was conducted at 600°C using silver nitrate as a metallic silver (Ag) precursor and oil palm leaves as a silica (SiO2) source. X-ray diffraction of the solid product (Ag@OPLA600) revealed the presence of Ag and SiO2 from the oil palm leaves. Fourier transform infrared spectroscopy showed an absorbance consistent with the presence of SiO2. Scanning electron microscopy revealed a solid surface with cavities. Ag@OPLA600 was used as a heterogeneous mediator to reduce p-nitrophenol to p-aminophenol within 15 minutes. This work provides a new approach for the utilization of sustainable natural resources as a metal Ag supporting material to produce a mediator for the conversion of p-nitrophenol to p-aminophenol in a simple manner.

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Immobilization of silver-loaded graphene oxide (Ag-GO) on canvas fabric support for catalytic conversion of 4 nitrophenol

Tazi,

Majdoub,

Majdoub

et al. 2024

Environ Sci Pollut Res

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Investigation on SiO2 derived from sugarcane bagasse ash and pumice stone as a catalyst support for silver metal in the 4-nitrophenol reduction reaction

Cited by 12 publications

References 60 publications

Investigation of the removal kinetics, thermodynamics and adsorption mechanism of anionic textile dye, Remazol Red RB, with powder pumice, a sustainable adsorbent from waste water

Investigation of the removal kinetics, thermodynamics and adsorption mechanism of anionic textile dye, Remazol Red RB, with powder pumice, a sustainable adsorbent from waste water

Fabrication of Silver-Silica Composite using the Carbo-thermal Degradation of Oil Palm Leaves for the Reduction of p-nitrophenol

Immobilization of silver-loaded graphene oxide (Ag-GO) on canvas fabric support for catalytic conversion of 4 nitrophenol

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