Lignocellulosic biomass supported metal nanoparticles for the catalytic reduction of organic pollutants

Akhtar, Kalsoom; Ali, Fayaz; Sohni, Saima; Kamal, Tahseen; Asiri, Abdullah M.; Bakhsh, Esraa M.; Khan, Sher Bahadar

doi:10.1007/s11356-019-06908-y

Cited by 44 publications

(14 citation statements)

References 79 publications

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“…With the difference in pyrolysis temperature, heating time, preparation of raw materials, and other factors, the properties of biochar will differ, its functions will be more abundant, and its development potential is virtually unlimited [26][27][28][29]. In the pollutant treatment process, these carbon materials, including commercial carbon materials, biochar, and its modified materials, exhibit a wide range of effective applications for the treatment of halogenated hydrocarbons [30,31], benzene series [32,33], heavy metals [34,35], and other pollutants. As a matter of course, these series of carbon materials can be applied to the treatment of dyes, most of which feature adsorption and advanced oxidation [36,37], but few have been used as catalysts for the sulfide-based reduction of dyes.…”

Section: Introductionmentioning

confidence: 99%

Biochar Derived from Agricultural Wastes as a Means of Facilitating the Degradation of Azo Dyes by Sulfides

et al. 2021

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Dyes are common contaminants, some of which are teratogenic, carcinogenic, and causative of ecological damage, and dye wastewater often contains toxic sulfides. Biochar has been widely used for the adsorption and catalysis degradation of pollutants, including dyes and sulfides, due to its abundant surface functional groups and large specific surface area. Therefore, the simultaneous treatment of dyes and sulfides with biochar may be a feasible, effective, and novel solution. This study sought to utilize low-cost, environmentally friendly, and widely sourced biochar materials from agricultural wastes such as corn stalk, rice chaff, and bean stalk to promote the reduction of dyes by sulfides. Through the action of different biochars, sulfides can rapidly decompose and transform oxidizing dyes. The RCB800 (rice chaff biochar material prepared at 800 °C) was observed to have the best effect, with a degradation rate of 96.6% in 40 min and 100% in 50 min for methyl orange. This series of materials are highly adaptable to temperature and pH, and the concentration of sulfides has a significant effect on degradation rates. Compared with commercial carbon materials, biochars are similar in terms of their catalytic mechanism and are more economical. Scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption and desorption characterization results indicated that biochar contains more pores, including mesopores, and a sufficient specific surface area, both of which are conducive to the combination of sulfides and dyes with biochar. X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy showed that there are oxygen-containing functional groups (examples include quinones and carboxyl groups) on the surface of biochar that promote the reaction of sulfide and dye. The formation of active polysulfides also potentially plays an important role in the degradation reaction. This article outlines a new method for improving the degradation efficiency of azo dyes and sulfides via biochar materials derived from widely sourced agricultural wastes.

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Section: Introductionmentioning

confidence: 99%

Biochar Derived from Agricultural Wastes as a Means of Facilitating the Degradation of Azo Dyes by Sulfides

et al. 2021

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“…Other zero-valent metal NPs (25 nm) such as Cu, Ni, Co, Ag and Zn have been synthesized using lignocellulosic biomass as support and CuSO 4 , NiSO 4 , CoNO 3 , AgNO 3 and ZnNO 3 as precursors. 337 The combination of salts (CuSO 4 + NiSO 4 , CuSO 4 + CoNO 3 , CuSO 4 + AgNO 3 and CuSO 4 + ZnNO 3 ) was also investigated to afford Cu + Co, Cu + Ag, Cu + Ni and Cu + Zn NPs, respectively. Overall, lignin serves not only as a reducing agent but also as a supporting material to prevent the zero-valent NPs from oxidation and agglomeration, keeping their catalytic performance intact.…”

Section: Lignin-based Nanohybridsmentioning

confidence: 99%

Multifunctional lignin-based nanocomposites and nanohybrids

et al. 2021

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“…Much attention has been paid to obtain an effective solid support material to anchor Cu NPS. Over the years, numerous attempts have been focused on nding non-toxic, inexhaustible, and biodegradable composites from plant biomass (Akhtar et al 2020;Su et al 2019). Furthermore, when some functional groups such as carboxyl, amino, and hydroxyl are grafted into the supporting material, metal ions are immobilized spontaneously by electrostatic interactions, which can disperse the metal ions excellently to prevent self-aggregation (Liu et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Study on Reduction of 4-nitrophenol by Magnetic Maize Straw Supported with Copper Nanoparticles

Guo

Wang

et al. 2021

Preprint

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In this work, magnetic maize straw was prepared by the amidation process using renewable maize straw as starting material. After magnetic succinylated maize straw (Mag-S-MS) was mixed with cupric ions aqueous solution, Cu (II) could be captured by the amino and carboxylate groups. Then, the bonded Cu (II) was converted to valuable Cu nanoparticles (Cu NPS). It was characterized by SEM-EDS, XRD, XPS, and TGA, which indicated Cu NPS were formed successfully on Mag-S-MS without self-aggregation and oxidation. The above nanocomposites could be employed as a catalyst for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). The effect of the dosage of Cu NPS loaded-Mag-S-MS, the initial concentrations of NaBH4 and 4-NP were investigated, and a possible mechanism was discussed. The catalyst maintained relatively high catalytic activity after five cycle tests. Due to its superparamagnetic nature, it could be quickly collected from the aqueous solution under a magnetic field. These results could provide a method for using agricultural waste in nano catalytic reaction.

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Lignocellulosic biomass supported metal nanoparticles for the catalytic reduction of organic pollutants

Cited by 44 publications

References 79 publications

Biochar Derived from Agricultural Wastes as a Means of Facilitating the Degradation of Azo Dyes by Sulfides

Biochar Derived from Agricultural Wastes as a Means of Facilitating the Degradation of Azo Dyes by Sulfides

Multifunctional lignin-based nanocomposites and nanohybrids

Study on Reduction of 4-nitrophenol by Magnetic Maize Straw Supported with Copper Nanoparticles

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