Preparation, environmental application and prospect of biochar-supported metal nanoparticles: A review

Liu, Jiwei; Jiang, Jianguo; Meng, Yuan; Aihemaiti, Aikelaimu; Xu, Yiwen; Xiang, Honglin; Gao, Yuchen; Chen, Xuejing

doi:10.1016/j.jhazmat.2020.122026

Cited by 234 publications

(83 citation statements)

References 191 publications

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“…The raw biochar (BC) material was prepared by the pyrolysis of sewage sludge using a muffle furnace (Asahi Rika tabletop, AMF-25 N, Japan). An oxygen-free condition was enabled by vacuum evacuation for about 5 min, and the pyrolysis process was performed at 900 °C with a heating rate of 5 °C/min for 60 min [17,19,20]. For the preparation of modified biochar, chicken eggshell waste was acquired from a restaurant at Egypt-Japan University of Science and Technology (E-JUST).…”

Section: Preparation Of Adsorbent (Ie Biochar and Eggshell-modifiementioning

confidence: 99%

“…The review articles by Liu et al [17] and Xiang et al [18] have summarized the recent applications of biochar as a low-cost, highly efficient, and eco-friendly adsorbent for the removal of a wide range of pollutants from industrial, agricultural, and municipal wastewaters. However, these comprehensive reviews demonstrate that few studies have focused on applying biochar for the removal of petroleum pollutants, suggesting that this topic has a knowledge gap in the existing literature.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of sludge-derived biochar modified with eggshell waste for monoethylene glycol removal from aqueous solutions

et al. 2020

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In this study, the pyrolysis of sewage sludge was employed to prepare a biochar (BC) adsorbent that was modified using eggshell wastes, obtaining eggshell-modified biochar (EMBC). The adsorbent material was used for the removal of monoethylene glycol (MEG) from aqueous solutions under various adsorption conditions. Results showed that the specific surface area of EMBC (i.e., 3.95 m 2 /g) was approximately twofold higher than that of BC, implying that the application of eggshell waste would improve the surface adsorption performance. The optimum adsorption pH value was 7, achieving MEG removal efficiencies of 29.9% for BC and 89.9% for EMBC using adsorbent dosage = 2 g/L, initial MEG concentration = 100 mg/L, and 25 °C within 60 min. The adsorption mechanisms were illustrated regarding XRD, FTIR, and SEM, demonstrating that surface adsorption, pore-filling, precipitation, and complexation contributed to the adsorption process. The adsorption data fitted well to the Langmuir isotherm model with the maximum monolayer adsorption capacity of 12.20 mg/g, implying a reversible physisorption mechanism. Based on a techno-economic feasibility assessment, the preparation of BC and EMBC adsorbents for the treatment of 1 m 3 of wastewater-containing ethylene glycol would require capital costs of 4.80 and 6.50 US$, respectively. The selling of adsorbents and the economic benefit of tertiary treated water showed adequate annual profitability with payback periods of 12.97 and 6.79 years for the BC and EMBC scenarios, respectively. Hence, the study succeeded in preparing efficient and low-cost adsorbents that could be used for the tertiary treatment of petrochemical industrial wastewater containing toxic environmental pollutants.

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Section: Preparation Of Adsorbent (Ie Biochar and Eggshell-modifiementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of sludge-derived biochar modified with eggshell waste for monoethylene glycol removal from aqueous solutions

et al. 2020

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“…There are three common methods for preparing biochars/metals catalysts ( Figure ): [ 177 ] 1)Enrichment of target metallic elements through biological accumulation; 2)Pretreatment of biomass with metal salts before pyrolysis; 3)Loading metal nanoparticles onto biochar after pyrolysis. …”

Section: Conversion Of Biomasses Into Biochar Catalystsmentioning

confidence: 99%

Hydrothermal and Pyrolytic Conversion of Biomasses into Catalysts for Advanced Oxidation Treatments

Zheng

et al. 2020

Adv Funct Materials

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Biomasses are very important natural products. Transferring biomass into catalysts for the advanced oxidation process (AOP) via heat treatment has attracted extensive attention. This review systematically introduces and summarizes two kinds of innovative biomass‐based catalysts according to the treating temperature. At low temperature (<300 °C), biomasses are converted into hydrothermal carbonation carbon (HTCC) with semiconductive properties for photocatalysis application. At high temperature (>300 °C), by contrast, the products lose their semiconductive nature and become a conductive carbon‐based conductor (biochar). They usually work as AOP catalysts by activating oxidant of O2, H2O2, and peroxysulfate for environmental treatment. This review summarizes and compares HTCC and biochar according to their formation process, structure, catalytic mechanism, and key points for the activity enhancement. The active units in HTCC are the sp2‐hybridized polyfuran unit while those in biochar are the persistent free radicals, nitrogen‐containing unit, or defects. HTCC converts water into OH radicals by using the photoexcited electron/hole pairs induced by solar illumination, while biochar activates oxidants via the active unit on its surface. More importantly, this review summarizes and demonstrates the key points to obtain high‐efficiency HTCC and biochar catalysts. Finally, conclusions are drawn and the future aspects for biomass‐based catalysis are given.

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“…In addition, its chemical and thermal stability allows biochar-based materials to be used in a wide range of conditions, thus conferring the suitability to be used as a support for the nanoparticle-based catalyst. Supported metal nanoparticles on biochar-based materials and other carbon-based nanomaterials have been employed in several processes, including hydrogen production and storage or the methanation reaction of carbon monoxide/dioxide, photocatalysis, and environmental remediation [ 41 , 42 ]. In this section, we will focus on the use of biochar as a supporting material for metal oxides and/or nanoparticles and the use of this supported catalyst in selected energy applications, such as hydrogen storage and production and the methanation reaction of carbon dioxide.…”

Section: Biochar-based Materials For Catalysismentioning

confidence: 99%

“…However, the biochar-based material capacity for hydrogen adsorption is less than 1% wt at room temperature and this capacity does not increase even when high pressures are applied. Nonetheless, the hydrogen adsorption capacity can be enhanced with the use of metal-decorated porous carbon materials [ 4 , 42 ]. For example, Pd-decorated carbon from sepiolite exhibited a storage capacity 4 times higher than the raw material without Pd doping at room temperature [ 44 ].…”

Section: Biochar-based Materials For Catalysismentioning

confidence: 99%

Sustainable Carbon as Efficient Support for Metal-Based Nanocatalyst: Applications in Energy Harvesting and Storage

et al. 2020

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Sustainable activated carbon can be obtained from the pyrolysis/activation of biomass wastes coming from different origins. Carbon obtained in this way shows interesting properties, such as high surface area, electrical conductivity, thermal and chemical stability, and porosity. These characteristics among others, such as a tailored pore size distribution and the possibility of functionalization, lead to an increased use of activated carbons in catalysis. The use of activated carbons from biomass origins is a step forward in the development of more sustainable processes enhancing material recycling and reuse in the frame of a circular economy. In this article, a perspective of different heterogeneous catalysts based on sustainable activated carbon from biomass origins will be analyzed focusing on their properties and catalytic performance for determined energy-related applications. In this way, the article aims to give the reader a scope of the potential of these tailor-made sustainable materials as a support in heterogeneous catalysis and future developments needed to improve catalyst performance. The selected applications are those related with H2 energy and the production of biomethane for energy through CO2 methanation.

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Preparation, environmental application and prospect of biochar-supported metal nanoparticles: A review

Cited by 234 publications

References 191 publications

Synthesis of sludge-derived biochar modified with eggshell waste for monoethylene glycol removal from aqueous solutions

Synthesis of sludge-derived biochar modified with eggshell waste for monoethylene glycol removal from aqueous solutions

Hydrothermal and Pyrolytic Conversion of Biomasses into Catalysts for Advanced Oxidation Treatments

Sustainable Carbon as Efficient Support for Metal-Based Nanocatalyst: Applications in Energy Harvesting and Storage

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