Catalysis-involved 3D N-doped graphene aerogel achieves a superior solar water purification rate and efficiency

Tian, Yue; Du, Chunfang; Yong, Shanghai; Zhou, Xin; Zhou, Chen; Yang, Shengyang

doi:10.1016/j.cej.2022.139793

Cited by 44 publications

(8 citation statements)

References 59 publications

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“…This is caused by the larger surface evaporation area that 3D evaporators have over 2D evaporators. 81,82 Moreover, 3D evaporators are able to achieve a lower temperature than the surrounding air during solar steam generation, leading to an evaporative cooling effect. The 3D evaporator can then extract net energy from the environment, which significantly improves water evaporation performance.…”

Section: D Vs 3d Evaporatormentioning

confidence: 99%

Updated perspective on solar steam generation application

Onggowarsito,

Mao,

Zhang

et al. 2024

Energy Environ. Sci.

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Section: D Vs 3d Evaporatormentioning

confidence: 99%

Updated perspective on solar steam generation application

Onggowarsito,

Mao,

Zhang

et al. 2024

Energy Environ. Sci.

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“…[21,70,129] For example, Tian et al incorporated N-doped graphene aerogel with Ag-MnO 2 nanocatalytic. [13] The composite aerogel demonstrated exceptional absorption ability (95% of the whole spectrum) and exhibited a low thermal conductivity due to its highly porous structure. The efficiency of photothermal conversion was further improved by the excellent absorption ability and low thermal conductivity, achieving an efficiency of up to 90.25%.…”

Section: Photothermal Effect Assisted Photocatalysismentioning

confidence: 99%

“…For example, The CDs with heteroatom doping had higher photothermal conversion efficiency owing to the band‐gap energy being decreased, [ 91,92 ] and N‐doped graphene aerogel had higher optical absorption owing to the rough and disorganized laminar structure. [ 13 ] Similarly, N‐doped graphene sheets were demonstrated to have a lower total reflectance (2–10%) than pure graphene sheets (5–10%). [ 22 ] In addition, the formation of amorphous carbon can also achieve a tight arrangement of energy levels outside the nucleus, because the amorphous materials are no long‐range crystalline order and usually contain other atoms such as hydrogen and nitrogen.…”

Section: Design Of Carbonaceous Materials For Efficient Photothermal ...mentioning

confidence: 99%

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Carbonaceous Materials‐Based Photothermal Process in Water Treatment: From Originals to Frontier Applications

Hu,

Qin,

et al. 2023

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The photothermal process has attracted considerable attention in water treatment due to its advantages of low energy consumption and high efficiency. In this respect, photothermal materials play a crucial role in the photothermal process. Particularly, carbonaceous materials have emerged as promising candidates for this process because of exceptional photothermal performance. While previous research on carbonaceous materials has primarily focused on photothermal evaporation and sterilization, there is now a growing interest in exploring the potential of photothermal effect‐assisted advanced oxidation processes (AOPs). However, the underlying mechanism of the photothermal effect assisted by carbonaceous materials remains unclear. This review aims to provide a comprehensive review of the photothermal process of carbonaceous materials in water treatment. It begins by introducing the photothermal properties of carbonaceous materials, followed by a discussion on strategies for enhancing these properties. Then, the application of carbonaceous materials‐based photothermal process for water treatment is summarized. This includes both direct photothermal processes such as photothermal evaporation and sterilization, as well as indirect photothermal processes that assisted AOPs. Meanwhile, various mechanisms assisted by the photothermal effect are summarized. Finally, the challenges and opportunities of using carbonaceous materials‐based photothermal processes for water treatment are proposed.

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“…Generally, a typical high-performance solar interface evaporator should have some unique features, such as outstanding light absorption performance, continuous and reliable water supply capacity, good thermal management ability, and porous steam channel structure [ 12 , 13 , 14 , 15 ]. In this respect, metal materials [ 16 , 17 , 18 , 19 ], semiconductors [ 20 , 21 , 22 , 23 ], carbon-based materials [ 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ], and organic polymers [ 32 , 33 ] are the four broad categories of solar thermal conversion materials because of their high light absorption performance. Among these, biochar with high absorbance, high specific surface area, and stable chemical properties is regarded as an inexpensive and easily accessible carbon-based material.…”

Section: Introductionmentioning

confidence: 99%

Biochar-Based Photothermal Hydrogel for Efficient Solar Water Purification

et al. 2023

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The development of technology for solar interface evaporation has a significant meaning for the sustainable use of water resources in remote regions. However, establishing a solar evaporator with a high evaporation rate and favorable water treatment capabilities remains challenging. In this work, we reported a silver nanoparticle (AgNP)@carbonized cattail (CC)/polyvinyl alcohol (PVA) composite hydrogel (ACPH) membrane. Because of the successfully loaded AgNPs, which have a photothermal synergy with the CC, the ACPH-10 membrane obtained an excellent photothermal conversion performance. Additionally, the hydrophilicity of the ACPH-10 membrane ensures a sustainable water supply which is necessary for the improvement of the evaporation rate. Therefore, the ACPH-10 membrane achieves an evaporation rate of 1.66 kg m−2 h−1 and an efficiency of 88.0%, attributed to the remarkable photothermal conversion and water transmission. More importantly, the membrane exhibits superior purification ability in a variety of sewage. Pollutant removal rates in heavy metal and organic dye sewage have exceeded 99.8%. As a result, the ACPH membrane holds great promise for wastewater recovery and seawater desalination, which can aid in resolving the water crisis issue.

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Catalysis-involved 3D N-doped graphene aerogel achieves a superior solar water purification rate and efficiency

Cited by 44 publications

References 59 publications

Updated perspective on solar steam generation application

Updated perspective on solar steam generation application

Carbonaceous Materials‐Based Photothermal Process in Water Treatment: From Originals to Frontier Applications

Biochar-Based Photothermal Hydrogel for Efficient Solar Water Purification

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