Turning Trash into Treasure: Pencil Waste–Derived Materials for Solar‐Powered Water Evaporation

Lü, Yi; Dai, Tianyi; Fan, Deqi; Min, Huihua; Ding, Shuai; Yang, Xiaofei

doi:10.1002/ente.202000567

Cited by 23 publications

(6 citation statements)

References 65 publications

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“…Carbonizing Platanus fruits requires a two-step heating (180 °C for 1 h and 600 °C for 1 h) for processing a three-dimensional (3D) spherical structure for solar evaporation of water, showing an evaporation efficiency of 81.3%. 33 Similarly carbonized waste products like pencil shavings (900 °C for 5 h) 34 and coffee grounds (1000 °C) 4 require high energy for processing and show efficiencies of 82.2 and 71.7% respectively, under 1 sun illumination.…”

Section: Introductionmentioning

confidence: 99%

“…Carbonizing natural biomass (i.e., loofah, bamboo, mushrooms, lotus seedpods, and so forth) − as well as waste (i.e. coffee grounds, pencil shavings, moldy bread) ,, is another way of making solar absorbers for solar thermal evaporation of water. However, carbonizing these biomass or wastes requires a very high temperature, which is energy consuming.…”

Section: Introductionmentioning

confidence: 99%

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Waste Egg Tray and Toner-Derived Highly Efficient 3D Solar Evaporator for Freshwater Generation

Ivan

Saleque

Ahmed

et al. 2022

ACS Appl. Mater. Interfaces

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With the advancement of civilization, water purification, as well as management and disposal of ever-increasing municipal solid waste (MSW), and e-waste, have become global concerns. To address these issues in a sustainable way, a 3D solar evaporator has been proposed in this paper by repurposing recycled paper from MSW in the form of egg trays and waste dry toner (e-waste) using a facile fabrication method. The unique 3D porous structure, fibrous surface, superior water absorbing capability as well as low thermal conductivity of wastepaperderived egg trays make them an excellent candidate for an efficient solar evaporator, while the waste toner powder coating significantly enhances the optical absorbance capacity. Under 1 sun illumination, the proposed solar evaporator demonstrates an excellent evaporation rate and efficiency of 1.3 kg/m 2 h and 78.5%, respectively. Moreover, the competitive advantage of the 3D structure in collecting solar irradiance at various light incident angles in comparison to a 2D structure, excellent cycle stability, low processing temperature, and the use of low-cost waste materials enable its use for large-scale water purification systems.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Waste Egg Tray and Toner-Derived Highly Efficient 3D Solar Evaporator for Freshwater Generation

Ivan

Saleque

Ahmed

et al. 2022

ACS Appl. Mater. Interfaces

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“…Du et al [ 139 ] prepared resorcinol–formaldehyde (RF) aerogel by sol–gel polymerization, and carbonized it to obtain carbon black aerogel (CA), which was used as an SSGD under 1 sun irradiation with evaporation rate of 1.29 kg m −2 h −1 , and the water evaporation rate can be increased to 1.37 kg m −2 h −1 after CO 2 activation; the corresponding evaporation efficiency was 87.5%. The crosslinked aromatic polymer porous foam (PDVB–PS) was prepared by one‐step hydrothermal method using styrene as monomer and two vinyl benzene as crosslinking agent by Li.…”

Section: Polymer‐based Solar Steam Generatorsmentioning

confidence: 99%

Recent Progress on the Solar‐Driven Interfacial Evaporation Based on Natural Products and Synthetic Polymers

Wang

Bai

et al. 2021

Solar RRL

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Solar steam generation (SSG) has emerged as a promising technology to utilize solar energy for desalination. As the key part of the SSG system, photothermal materials (PMs) play a critical role due to their unique solar‐driven interface evaporation pattern. Herein, the research progress of PMs based on natural products and synthetic polymers in recent years is reviewed. The major emphasis lies on the preparation method, the structure, and the solar energy conversion efficiency of such PMs. Further understanding of the structure–performance relationship of these materials may supply useful guidance for design and fabrication of high‐performance PMs, which is of great importance for the promotion of practical application of SSG.

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“…One way to valorize agro-wastes is via pyrolysis into biochar [1], under inert atmosphere or in the presence of very low amount of air [2][3][4]. "Biochar" is nowadays a very hot research topic because it arises from the Trash-to-Treasure concept [5,6], and thus falls within the general domain of sustainable development [7]. Much has been said on the preparation of biochar [8], and control of its composition [9], graphitization degree [10] and porosity [11] among other features [2,12,13].…”

Section: Introductionmentioning

confidence: 99%

Citric Acid-Assisted Preparation of Biochar Loaded with Copper/Nickel Bimetallic Nanoparticles

Omiri¹,

Snoussi²,

Bhakta³

et al. 2022

Preprint

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Biochar is a carbon allotrope obtained by pyrolysis of biomass, usually agro-waste. Owing to the demand for sustainable development, biochar is continuously raising much hope in the scientific community. However, in order to impart it with new properties, its modification is required, either in situ during pyrolysis, or after the carbonization process. Herein, we propose a new direct approach to obtain bimetallic copper/nickel nanoparticle-loaded on olive stone biochar. The bimetallic-coated biochar and the reference materials bare biochar, copper-loaded and nickel-loaded biochar were prepared at 400 °C under a stream of dinitrogen from olive pit powder particles impregnated first with citric acid (CA), and then with copper and nickel nitrates. We have employed citric acid in the process in order to check its effect on the structural and textural properties of biochar supporting the metallic nanoparticles. Surprisingly, citric acid induced the formation of agglomerated or even raspberry-shaped, bimetallic copper/nickel nanoparticles. Large 450-500 nm-sized agglomerates of ~80 nm bimetallic CuNi NPs were noted for B-CA@CuNi. Interestingly, for biochar material prepared with initial Cu/Ni=10 molar ratio (B-CA@CuNi10/1), the bimetallic NPs formed unusual nano-raspberries (1748 nm in size) which are agglomerates of individual 10-20 nm-sized CuNi10/1 nanoparticles. The B-CA@CuNi and reference materials were characterized by Raman spectroscopy, scanning electron microscopy (SEM)/energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and magnetometry. The B-CA@CuNi and B-CA@Ni materials could be attracted efficiently with a magnet, but not B-CA@CuNi10/1 due to a low nickel loading. B-CA@CuNi was tested as a catalyst for the degradation of methyl orange (MO). Discoloration was noted within 10 min, much faster than a similar material prepared in the absence of CA. B-CA@CuNi could be recycled at least 3 times with exhibit as fast discoloration catalysis performance. This paper stresses the important role of citric acid in shaping the bimetallic nanoparticles loaded in situ on biochar during the slow pyrolysis process and to enable faster catalysed discoloration of organic dye solution.

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Turning Trash into Treasure: Pencil Waste–Derived Materials for Solar‐Powered Water Evaporation

Cited by 23 publications

References 65 publications

Waste Egg Tray and Toner-Derived Highly Efficient 3D Solar Evaporator for Freshwater Generation

Waste Egg Tray and Toner-Derived Highly Efficient 3D Solar Evaporator for Freshwater Generation

Recent Progress on the Solar‐Driven Interfacial Evaporation Based on Natural Products and Synthetic Polymers

Citric Acid-Assisted Preparation of Biochar Loaded with Copper/Nickel Bimetallic Nanoparticles

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