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Yang Z, Li D, Zhu Y, Zhu X, Yu W, Yang K, Chen B. Developing Salt-Rejecting Evaporators for Solar Desalination: A Critical Review. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:8610-8630. [PMID: 38720447 DOI: 10.1021/acs.est.3c09703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Solar desalination, a green, low-cost, and sustainable technology, offers a promising way to get clean water from seawater without relying on electricity and complex infrastructures. However, the main challenge faced in solar desalination is salt accumulation, either on the surface of or inside the solar evaporator, which can impair solar-to-vapor efficiency and even lead to the failure of the evaporator itself. While many ideas have been tried to address this ″salt accumulation″, scientists have not had a clear system for understanding what works best for the enhancement of salt-rejecting ability. Therein, for the first time, we classified the state-of-the-art salt-rejecting designs into isolation strategy (isolating the solar evaporator from brine), dilution strategy (diluting the concentrated brine), and crystallization strategy (regulating the crystallization site into a tiny area). Through the specific equations presented, we have identified key parameters for each strategy and highlighted the corresponding improvements in the solar desalination performance. This Review provides a semiquantitative perspective on salt-rejecting designs and critical parameters for enhancing the salt-rejecting ability of dilution-based, isolation-based, and crystallization-based solar evaporators. Ultimately, this knowledge can help us create reliable solar desalination solutions to provide clean water from even the saltiest sources.
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Affiliation(s)
- Zhi Yang
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou, Zhejiang 310058, China
- Innovation Center of Yangtze River Delta, Zhejiang University, Hangzhou, Zhejiang 311400, China
| | - Dawei Li
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou, Zhejiang 310058, China
| | - Yunxia Zhu
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou, Zhejiang 310058, China
| | - Xiangyu Zhu
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou, Zhejiang 310058, China
| | - Wentao Yu
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou, Zhejiang 310058, China
- Innovation Center of Yangtze River Delta, Zhejiang University, Hangzhou, Zhejiang 311400, China
| | - Kaijie Yang
- Advanced Membranes and Porous Materials (AMPM) Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Baoliang Chen
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou, Zhejiang 310058, China
- Innovation Center of Yangtze River Delta, Zhejiang University, Hangzhou, Zhejiang 311400, China
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Yi X, Zhang Z, Niu J, Wang H, Li T, Gong J, Zheng R. Green Strong Cornstalk Rind-Based Cellulose-PVA Aerogel for Oil Adsorption and Thermal Insulation. Polymers (Basel) 2024; 16:1260. [PMID: 38732729 PMCID: PMC11085144 DOI: 10.3390/polym16091260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 04/19/2024] [Accepted: 04/23/2024] [Indexed: 05/13/2024] Open
Abstract
Cellulose-based aerogel has attracted considerable attention for its excellent adsorption capacity, biodegradability, and renewability. However, it is considered eco-unfriendly due to defibrillation of agriculture waste and requires harmful/expensive chemical agents. In this study, cornstalk rind-based aerogel was obtained via the following steps: green H2O2/HAc delignification of cornstalk rind to obtain cellulose fibers, binding with carboxymethyl cellulose (CMC)/polyvinyl alcohol (PVA) and freeze-drying treatment, and hydrophobic modification with stearic acid. The obtained aerogel showed high compressive strength (200 KPa), which is apparently higher (about 32 kPa) than NaClO-delignified cornstalk-based cellulose/PVA aerogel. Characterization of the obtained aerogel through SEM, water contact angle, etc., showed high porosity (95%), low density (0.0198 g/cm-3), and hydrophobicity (water contact angle, 159°), resulting in excellent n-hexane adsorption capacity (35 g/g), higher (about 29.5 g/g) than NaClO-delignified cornstalk-based cellulose/PVA aerogel. The adsorbed oil was recovered by the extrusion method, and the aerogel showed excellent recyclability in oil adsorption.
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Affiliation(s)
- Xiaoyang Yi
- College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China; (X.Y.); (Z.Z.)
| | - Zhongxu Zhang
- College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China; (X.Y.); (Z.Z.)
| | - Junfeng Niu
- College of Biological & Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China; (J.N.); (T.L.); (J.G.)
| | | | - Tiankun Li
- College of Biological & Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China; (J.N.); (T.L.); (J.G.)
| | - Junjie Gong
- College of Biological & Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China; (J.N.); (T.L.); (J.G.)
| | - Rongbo Zheng
- College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China; (X.Y.); (Z.Z.)
- College of Biological & Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China; (J.N.); (T.L.); (J.G.)
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Liu Z, Miao Y, Shi Y, Yang Q, Zhao J, Feng Q. Natural down fiber-reinforced and polypyrrole-modified silk fibroin composite aerogel for efficient solar steam generation toward seawater desalination and wastewater treatment. Int J Biol Macromol 2024; 257:128678. [PMID: 38072342 DOI: 10.1016/j.ijbiomac.2023.128678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 11/28/2023] [Accepted: 12/06/2023] [Indexed: 01/27/2024]
Abstract
Poor mechanical properties and low photothermal efficiency of silk fibroin (SF)-based aerogels are current challenges that need to be addressed. Herein, SF composite aerogel was developed to enhance the mechanical properties through physical interpenetration of natural down fiber (Df) and hydrogen bonds formed among SF, Df, and polypyrrole (PPy) and to improve the evaporation performance via in-situ polymerization of PPy. The resultant Df/PPy@SF aerogel showed significant improvement of compressive stress (194.29 kPa), which was 6.96 times than that of SF aerogel (27.91 kPa), and also good compression resiliency. Furthermore, due to uniform distribution of PPy and high porosity of 95.27 %, Df/PPy@SF aerogel possessed high light absorbance of 99.87 % and low thermal conductivity (0.043 W·m-1·K-1). Thus, the Df/PPy@SF aerogel evaporator demonstrated high evaporation rates of 2.12 kg·m-2·h-1 for 3.5 wt% saline water, 2.04-2.15 kg·m-2·h-1 for various dye water, and 2.10 kg·m-2·h-1 for actual dye wastewater. Moreover, the developed aerogel exhibited evaporation stability and outstanding salt-resistance when treating seawater due to continuous water supply by superhydrophilic porous aerogel. Therefore, these findings demonstrate the excellent performance of Df/PPy@SF aerogel and will inspire further research on developing natural fiber-reinforced aerogels for use in the fields of solar water evaporation, energy, and other related applications.
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Affiliation(s)
- Zhi Liu
- School of Textile and Garment, Anhui Polytechnic University, Beijing Mid-Road, Wuhu 241000, China
| | - Yi Miao
- School of Textile and Garment, Anhui Polytechnic University, Beijing Mid-Road, Wuhu 241000, China
| | - Yiling Shi
- School of Textile and Garment, Anhui Polytechnic University, Beijing Mid-Road, Wuhu 241000, China
| | - Qinqin Yang
- School of Textile and Garment, Anhui Polytechnic University, Beijing Mid-Road, Wuhu 241000, China
| | - Jianghui Zhao
- School of Textile and Garment, Anhui Polytechnic University, Beijing Mid-Road, Wuhu 241000, China.
| | - Quan Feng
- School of Textile and Garment, Anhui Polytechnic University, Beijing Mid-Road, Wuhu 241000, China
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Lei C, Chen P, Zhang Z, Hua F, Hou X, Qu J, Zhao Y, Hu Q. Cellulose cryogels from herbal residues for oily wastewater purification. Int J Biol Macromol 2023; 252:126417. [PMID: 37604424 DOI: 10.1016/j.ijbiomac.2023.126417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 08/08/2023] [Accepted: 08/17/2023] [Indexed: 08/23/2023]
Abstract
Recycling herbal residues for oily wastewater purification is a potential way to use the wastes to treat wastes. Cellulose extracted from herbal residues is a fine material for cryogel fabrication. However, the cellulose cryogels were not suitable for oily wastewater treatment due to their amphiphilicity. To address this issue, the cryogels were modified with methyltrimethoxysilane (MTMS), which made them hydrophobic and reduced their surface energy. In this study, the herbal residues (Ficus microcarpa L. f) were used in cryogel preparation for the first time. The cryogels exhibit super lightweight and low density. The modified cryogels show excellent sorption capacity for free oils, especially silicone oil (51.22 g/g), and outperformed some recent sorbents. They also effectively separated water-in-toluene emulsion stabilized by Span 80, with a separation efficiency of 98.57 % and a flux of 1474.67 L/m2h. This study demonstrated a novel application of waste herbal residues in the field of environmental remediation.
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Affiliation(s)
- Changyang Lei
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110006, PR China
| | - Peiying Chen
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110006, PR China
| | - Zonghui Zhang
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110006, PR China
| | - Fangcong Hua
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110006, PR China
| | - Xiaohong Hou
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110006, PR China
| | - Jianhua Qu
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Yudan Zhao
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110006, PR China.
| | - Qi Hu
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110006, PR China.
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Li J, Liu M, Luo W, Xing G, Yang W, Sun H, Jiao R, Zhang J, Li A. 3D Tea-Residue Microcrystalline Cellulose Aerogel with Aligned Channels for Solar-Driven Interfacial Evaporation Co-generation. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37890048 DOI: 10.1021/acsami.3c12170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/29/2023]
Abstract
Solar-driven interfacial evaporation co-generation (SIE-CG) technology is of great significance in solving the problem of water and energy shortage. Herein, we report the ionic liquid-assisted alignment of waste biomass tea residue-based microcrystalline cellulose for aerogels (abbreviated as TPPA-5) with aligned channels for solar-driven interfacial evaporation co-generation. In the ionic liquid, strong H-bonding is formed between the pyranoid rings of cellulose combined with the slow freezing technique, resulting in the microcrystalline cellulose being reoriented, which allowed TPPA-5 to form abundant aligned channels after solvent replacement and freeze-drying. These aligned channels enable the brine to form a localized circulating flow, which is conducive to the improvement of the TPPA's evaporation rate and salt resistance. The salinity gradient is naturally formed in the channel of TPPA, which enables TPPA-5 to show excellent power generation performance. The evaporation rate of TPPA-5 can reach 3.39 kg m-2 h-1 under 1 kW m-2. With methanol as a highly polar proton solvent, the maximum output voltage obtained was 67.534 mV due to the overlapping electric double-layer effect formed by hydrogen protons on the TPPA surface, and the energy utilization efficiency is 95.95%. Moreover, TPPA-5 can purify pesticide-containing wastewater, which has the advantages of being recyclable and environmentally friendly, showing potential application value in the field of seawater desalination and steam co-generation.
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Affiliation(s)
- Jiyan Li
- . . College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road No. 287, Lanzhou 730050, P.R. China
| | - Meichen Liu
- . . College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road No. 287, Lanzhou 730050, P.R. China
| | - Wenwen Luo
- . . College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road No. 287, Lanzhou 730050, P.R. China
| | - Guoyu Xing
- . . College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road No. 287, Lanzhou 730050, P.R. China
| | - Wenzhe Yang
- . . College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road No. 287, Lanzhou 730050, P.R. China
| | - Hanxue Sun
- . . College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road No. 287, Lanzhou 730050, P.R. China
| | - Rui Jiao
- . . College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road No. 287, Lanzhou 730050, P.R. China
| | - Junping Zhang
- . . Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China
| | - An Li
- . . College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road No. 287, Lanzhou 730050, P.R. China
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Xu Z, Ran X, Zhang Z, Zhong M, Wang D, Li P, Fan Z. Designing a solar interfacial evaporator based on tree structures for great coordination of water transport and salt rejection. MATERIALS HORIZONS 2023; 10:1737-1744. [PMID: 36799081 DOI: 10.1039/d2mh01447e] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Solar interfacial evaporation has been receiving increasing attention but it is still a huge challenge to achieve excellent coordination between efficient water transport and salt rejection. Here, unlike the common wood-inspired evaporators with equal-diameter directional pores, we have constructed an integrated structure with highly connected gradient pores that mimic the xylem vessels and phloem sieve tubes found in trees. The bio-inspired structure can reduce the resistance of water transport and salt rejection in the same channel. The average transport speed of the 6.5 cm high (2 cm in diameter) porous structure reached 1.504 g s-1, and water was transported 16 cm after 100 seconds. Using multilayer graphene oxide as the photothermal conversion material, the evaporators with different heights can work for more than 9 hours under the condition of 1 sun illumination and 23 wt% brine without any salt crystallization, and the evaporation rates range from 3.28 to 4.51 kg m-2 h-1, with the highest energy utilization efficiency of about 80%. When used in heavy metal treatment, the rejection was greater than 99.99%. This research provides a simple but innovative design idea for evaporators and is expected to further expand the application of solar interfacial evaporation.
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Affiliation(s)
- Zhicheng Xu
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
| | - Xueqin Ran
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
| | - Zhijie Zhang
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
| | - Mingfeng Zhong
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
| | - Da Wang
- School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510640, China
| | - Pengping Li
- Key Laboratory of Harbor and Marine Structure Durability Technology Ministry of Communications, Guangzhou, 510230, China
| | - Zhihong Fan
- Key Laboratory of Harbor and Marine Structure Durability Technology Ministry of Communications, Guangzhou, 510230, China
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Nguyen HG, Nguyen TAH, Do DB, Pham XN, Nguyen TH, Nghiem HLT, Nguyen MV, Pham TT. Natural Cellulose Fiber-Derived Photothermal Aerogel for Efficient and Sustainable Solar Desalination. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:6780-6793. [PMID: 37140431 DOI: 10.1021/acs.langmuir.3c00297] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Aerogels are becoming a promising platform to fabricate photothermal materials for use in solar steam generation (SSG), which have remarkable application potential in solar desalination, due to their excellent thermal management, salt resistance, and considerable water evaporation rate. In this work, a novel photothermal material is fabricated by forming a suspension between sugarcane bagasse fibers (SBF) and poly(vinyl alcohol), tannic acid (TA), and Fe3+ solutions via hydrogen bonds of hydroxyl groups. After freeze drying, the fabricated SBF aerogel-based photothermal (SBFAP) material possesses a 3D interconnected porous microstructure, which could enhance water transportation ability, reduce thermal conductivity, and quickly dissolve salt crystals on the SBFAP surface. Thanks to the formation of micro/nanosized complexes between TA and Fe3+ ions on the SBFAP material, the SBFAP exhibits high light capture and water evaporation rate (2.28 kg m-2 h-1). In particular, due to strong hydrogen bonding and the SBF, the SBFAP material is reinforced, thereby exhibiting excellent structural stability in seawater. Moreover, the high salt tolerance of SBFAP favors its high desalination performance for at least 76 days of continuous evaporation under actual conditions. This research paves the way for the fabrication of natural cellulose fiber-based photothermal materials for application in solar desalination.
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Affiliation(s)
- Hoang Giang Nguyen
- Vietnam Japan University (VJU), Vietnam National University, Hanoi (VNU), Luu Huu Phuoc Street, Nam Tu Liem District, Hanoi 100000, Vietnam
- Environmental Radioactivity Monitoring & Impact Assessment Center, Institute for Nuclear Science and Technology, Vietnam Atomic Energy Institute, Hoang Quoc Viet Street, Cau Giay District, Hanoi 100000, Vietnam
| | - Thi An Hang Nguyen
- Vietnam Japan University (VJU), Vietnam National University, Hanoi (VNU), Luu Huu Phuoc Street, Nam Tu Liem District, Hanoi 100000, Vietnam
| | - Danh Bich Do
- Faculty of Physics, Hanoi National University of Education, 136 Xuan Thuy Street, Cau Giay District, Hanoi 100000, Vietnam
| | - Xuan Nui Pham
- Department of Chemical Engineering, Hanoi University of Mining and Geology, 18 Pho Vien Street, Duc Thang, Bac Tu Liem District, Hanoi 100000, Vietnam
| | - Tuan Hong Nguyen
- Center for High Technology Development, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet Street, Cau Giay District, Hanoi 100000, Vietnam
| | - Ha Lien Thi Nghiem
- Institute of Physics, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Cau Giay District, Hanoi 100000, Vietnam
| | - Minh Viet Nguyen
- VNU Key Laboratory of Advanced Material for Green Growth, Faculty of Chemistry, VNU University of Science, 334 Nguyen Trai Street, Thanh Xuan, Hanoi 100000, Vietnam
| | - Tien Thanh Pham
- Vietnam Japan University (VJU), Vietnam National University, Hanoi (VNU), Luu Huu Phuoc Street, Nam Tu Liem District, Hanoi 100000, Vietnam
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Guo XJ, Wang X, Xue CH, Liu BY, Wu YG, Zhang D, Deng FQ, An QF, Pu YP. Salt-blocking three-dimensional Janus evaporator with superwettability gradient for efficient and stable solar desalination. J Colloid Interface Sci 2023; 644:157-166. [PMID: 37105039 DOI: 10.1016/j.jcis.2023.04.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 04/10/2023] [Accepted: 04/17/2023] [Indexed: 04/29/2023]
Abstract
Solar interfacial steam power generation is a prospective method for seawater desalination. In this work, a salt-blocking three-dimensional (3D) Janus evaporator with a superhydrophobic to superhydrophilic gradient was fabricated by spraying a composite dispersion of multi-walled carbon nanotubes/polydimethylsiloxane (CNTs/PDMS) onto the top side of a polyurethane (PU) foam and polyvinyl alcohol (PVA) solution onto the bottom side. The CNTs/PDMS composite dispersion with nanostructured CNTs and low surface energy PDMS combined with the porous structure of the PU foam rendered the top side superhydrophobic. Therefore, a layer suitable for photothermal conversion was obtained. The hydrophilic PVA combined with the porous structure of the foam rendered the bottom side superhydrophilic, facilitating water absorption and transportation. The asymmetric wettability gradient of the CNTs/PDMS-PU-PVA as a 3D evaporator caused the evaporation rate and transportation speed of water to reach a balance, and the salt was quickly dissolved at the superhydrophilic interface. This 3D salt-resistant Janus evaporator achieved an evaporation rate of 2.26 kg m-2 h-1 under 1 kW m-2 illumination.
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Affiliation(s)
- Xiao-Jing Guo
- College of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Xing Wang
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Chao-Hua Xue
- College of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China; College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
| | - Bing-Ying Liu
- College of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, China
| | - Yong-Gang Wu
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Duo Zhang
- College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Fu-Quan Deng
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Qiu-Feng An
- College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Yong-Ping Pu
- College of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
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Li Z, Zhang Y, Huang Q, Chen Z, Wang W, Li W. Tailorable Lignocellulose-Based Aerogel to Achieve the Balance between Evaporation Enthalpy and Water Transport Rate for Efficient Solar Evaporation. ACS APPLIED MATERIALS & INTERFACES 2023; 15:11827-11836. [PMID: 36848290 DOI: 10.1021/acsami.2c22615] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Solar-driven interfacial evaporation technology has become an effective approach to alleviate freshwater shortage. To improve its evaporation efficiency, the pore-size dependence of the water transport rate and evaporation enthalpy in the evaporator should be further investigated. Based on the transportation of water and nutrients in natural wood, we facilely designed a lignocellulose aerogel-based evaporator using carboxymethyl nanocellulose (CMNC) cross-linking, bidirectional freezing, acetylation, and MXene-coating. The pore size of the aerogel was adjusted by controlling its CMNC content. When the channel diameter of the aerogel-based evaporator increased from 21.6 to 91.9 μm, the water transport rate of the proposed evaporator increased from 31.94 to 75.84 g min-1, while its enthalpy increased from 1146.53 to 1791.60 kJ kg-1. At a pore size of 73.4 μm, the evaporation enthalpy and water transport rate of the aerogel-based evaporator achieved a balance, leading to the best solar evaporation rate (2.86 kg m-2 h-1). The evaporator exhibited excellent photothermal conversion efficiency (93.36%) and salt resistance (no salt deposition after three cycles of 8 h). This study could guide the development of efficient solar-driven evaporators for seawater desalination.
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Affiliation(s)
- Zerong Li
- College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, China
| | - Yuping Zhang
- College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, China
| | - Qiaoling Huang
- College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, China
| | - Zhuoling Chen
- College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, China
| | - Wei Wang
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, China
| | - Wei Li
- College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, China
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10
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Hou X, Sun H, Dong F, Wang H, Bian Z. 3D carbonized grooved straw with efficient evaporation and salt resistance for solar steam generation. CHEMOSPHERE 2023; 315:137732. [PMID: 36608882 DOI: 10.1016/j.chemosphere.2022.137732] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/21/2022] [Accepted: 12/31/2022] [Indexed: 06/17/2023]
Abstract
Solar steam generation (SSG) is considered an effective solution to the global shortage of freshwater resources. To solve the practical application challenges of SSG in remote outdoor environments where electricity is scarce, it is of great importance to developing new solar evaporators. In this study, a three-dimensional (3D) biochar solar evaporator based on carbonized grooved straw was prepared from agricultural waste corn straw, which had high solar energy conversion efficiency and excellent salt resistance. The existence of grooves increases the surface area to absorb more sunlight and makes the light multilevel reflection improve the evaporation rate. The excellent light absorption, super hydrophilic, and heat shielding properties of 3D carbonized grooved straw resulted in a good evaporation rate (1.57 kg⋅m-2·h-1) and energy efficiency (85.9%) under 1 sun irradiation. The 3D grooved biochar solar distiller also demonstrated efficient formation evaporation performance and excellent salt resistance in practical applications in seawater desalination and surface water purification. The 3D grooved biochar solar distiller prepared from agricultural waste has the advantages of being economical and environmentally friendly, with good application prospects.
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Affiliation(s)
- Xiangting Hou
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, PR China
| | - Haiying Sun
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, PR China
| | - Fangyuan Dong
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, PR China
| | - Hui Wang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, PR China.
| | - Zhaoyong Bian
- College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China.
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11
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Tan F, Yu B, Wang Y, Bai Q, Zhang Z. Hierarchically Structured Nanoporous Palladium with Ordered/Disordered Channels for Ultrahigh and Fast Strain. NANO LETTERS 2023; 23:505-513. [PMID: 36630150 DOI: 10.1021/acs.nanolett.2c03833] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Metallic actuators have increasingly shown the potential to replace conventional piezoelectric ceramics and conducting polymers. However, it is still a great challenge to achieve strain amplitudes over 4% while maintaining fast strain responses. Herein, we fabricated bulk nanoporous palladium (NP-Pd) with microsheet-array-like hierarchically nanoporous (MAHNP) structure by dealloying a eutectic Al-Pd precursor. The hierarchical structure consists of array-like microsized channels/sheets and disordered nanosized networks. The locally ordered channels play a critical role in fast mass transport while nanoligaments accumulate a large surface area for hydrogen adsorption/absorption and desorption. Therefore, the MAHNP-Pd not only obtains a fast strain rate with the maximum value close to 1 × 10-4 s-1 but also exhibits an ultrahigh strain amplitude of 4.68%, exceeding all reported values for bulk electrochemical metallic actuators to date. Additionally, the superiority of the MAHNP structure is demonstrated in transport kinetics as benchmarked with the scenario of unimodal NP-Pd.
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Affiliation(s)
- Fuquan Tan
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jingshi Road 17923, Jinan250061, P. R. China
| | - Bin Yu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jingshi Road 17923, Jinan250061, P. R. China
| | - Yan Wang
- School of Materials Science and Engineering, University of Jinan, West Road of Nan Xinzhuang 336, Jinan250022, P. R. China
| | - Qingguo Bai
- School of Applied Physics and Materials, Wuyi University, Dongcheng Village 22, Jiangmen529020, P. R. China
| | - Zhonghua Zhang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jingshi Road 17923, Jinan250061, P. R. China
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12
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Setyawan H, Juliananda J, Widiyastuti W. Engineering Materials to Enhance Light-to-Heat Conversion for Efficient Solar Water Purification. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c03170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Affiliation(s)
- Heru Setyawan
- Department of Chemical Engineering, Faculty of Industrial Technology and System Engineering, Sepuluh Nopember Institute of Technology, Kampus ITS Sukolilo, Surabaya60111, Indonesia
| | - Juliananda Juliananda
- Department of Chemical Engineering, Faculty of Industrial Technology and System Engineering, Sepuluh Nopember Institute of Technology, Kampus ITS Sukolilo, Surabaya60111, Indonesia
| | - Widiyastuti Widiyastuti
- Department of Chemical Engineering, Faculty of Industrial Technology and System Engineering, Sepuluh Nopember Institute of Technology, Kampus ITS Sukolilo, Surabaya60111, Indonesia
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13
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Li J, Li N, Wu X, Wang S, Li S, Guo C, Yu L, Wang Z, Murto P, Xu X. Photothermal Aerogel Beads Based on Polysaccharides: Controlled Fabrication and Hybrid Applications in Solar-Powered Interfacial Evaporation, Water Remediation, and Soil Enrichment. ACS APPLIED MATERIALS & INTERFACES 2022; 14:50266-50279. [PMID: 36305787 DOI: 10.1021/acsami.2c16634] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Solar-powered interfacial evaporation has emerged as an innovative and sustainable technology for clean water production. However, the rapid, mass and shape-controlled fabrication of three-dimensional (3D) steam generators (SGs) for versatile hybrid applications remains challenging. Herein, composite aerogel beads with self-contained properties (i.e., hydrophilic, porous, photothermal, and durable) are developed and demonstrated for threefold hybrid applications including efficient solar-powered interfacial evaporation, water remediation, and controlled soil enrichment. The rational incorporation of selected polysaccharides enables us to fabricate bead-like aerogels with rapid gelation, continuous processing, and enhanced ion adsorption. The composite beads can attain a high water evaporation rate of 1.62 kg m-2 h-1 under 1 sun. Meanwhile, high phosphate adsorption capacity of over 120 mg g-1 is achieved in broad pH (2.5-12.4) and concentration (200-1000 mg L-1) ranges of phosphate solutions. Gratifyingly, we demonstrate the first example of recycling biomaterials from interfacial SGs for controlled nutrient release, soil enrichment, and sustainable agriculture. The phosphate-saturated beads can be gradually broken down in the soil. Macronutrients (N, P, and K) can be slowly released in 50 days, sustaining the plant germination and growth in a whole growth stage. This work shines light on the mass and controlled fabrication of aerogel beads based on double-network biopolymers, not merely scaling up solar-powered interfacial evaporation but also considering water remediation, waste material disposal, and value-added conversion.
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Affiliation(s)
- Jingjing Li
- College of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Na Li
- College of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Xiaochun Wu
- College of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Shuxue Wang
- College of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Shuai Li
- College of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Cui Guo
- College of Marine Life Science, Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao 266003, China
| | - Liangmin Yu
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
- Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Zhihang Wang
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296 Gothenburg, Sweden
| | - Petri Murto
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, United Kingdom
| | - Xiaofeng Xu
- College of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
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14
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Chen L, Mu X, Guo Y, Lu H, Yang Y, Xiao C, Hasi Q. MXene-doped kapok fiber aerogels with oleophobicity for efficient interfacial solar steam generation. J Colloid Interface Sci 2022; 626:35-46. [PMID: 35780550 DOI: 10.1016/j.jcis.2022.06.143] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Revised: 06/22/2022] [Accepted: 06/25/2022] [Indexed: 11/17/2022]
Abstract
Although the evaporation efficiency of photothermal materials (PMs) in pure water and brine solutions has been extensively studied, there few research on the performance in complex oily wastewater. Herein, a new monolithic solar steam generator derived from kapok fiber-based MXene composite aerogel (named as KFs-MXene) was fabricated by dipping the aerogels (KFs) which composed of kapok fiber and sodium alginate (SA) as substrates in the suspension of MXene. Benefitting from the outstanding light absorption (about 97%), better thermal insulation (thermal conductivity, 0.05039 W m-1 K-1), abundant porosity (95.60%) and rapid water transportation. KFs-MXene show good interfacial solar steam generation (ISSG) performance, resulting in a high water evaporation rate of 1.47 kg m-2h-1 with an outstanding evaporation efficiency of 90.4% under 1 kW m-2 irradiation. To improve the antifouling performance of KFs-MXene, chemically hydrophilic and oleophobic modification was applied, making the KFs-MXene can also be widely used in oily wastewater. Under 1 kW m-2 illumination, the evaporation rate and energy conversion efficiency of KFs-MXene with hydrophilic and oleophobic modification (O-KFs-MXene) in 1 wt% oily water can reach to 1.40 kg m-2h-1 and 82.87%, and the evaporation efficiency and rate of O-KFs-MXene remain stable in the continuous 6 h solar driven interface evaporation process.
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Affiliation(s)
- Lihua Chen
- College of Chemical Engineering, Experimental Teaching Department, Northwest Minzu University, Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Northwest Xincun 1, Lanzhou 730030, PR China.
| | - Xiaotong Mu
- College of Chemical Engineering, Experimental Teaching Department, Northwest Minzu University, Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Northwest Xincun 1, Lanzhou 730030, PR China
| | - Yuping Guo
- College of Chemical Engineering, Experimental Teaching Department, Northwest Minzu University, Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Northwest Xincun 1, Lanzhou 730030, PR China
| | - Haijing Lu
- College of Chemical Engineering, Experimental Teaching Department, Northwest Minzu University, Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Northwest Xincun 1, Lanzhou 730030, PR China
| | - Yiming Yang
- College of Chemical Engineering, Experimental Teaching Department, Northwest Minzu University, Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Northwest Xincun 1, Lanzhou 730030, PR China
| | - Chaohu Xiao
- College of Chemical Engineering, Experimental Teaching Department, Northwest Minzu University, Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Northwest Xincun 1, Lanzhou 730030, PR China
| | - Qimeige Hasi
- College of Chemical Engineering, Experimental Teaching Department, Northwest Minzu University, Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Northwest Xincun 1, Lanzhou 730030, PR China
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15
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Shen M, Zhao X, Han L, Jin N, Liu S, Jia T, Chen Z, Zhao X. Developing Flexible Quinacridone-Derivatives-Based Photothermal Evaporaters for Solar Steam and Thermoelectric Power Generation. Chemistry 2022; 28:e202104137. [PMID: 35102622 DOI: 10.1002/chem.202104137] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Indexed: 01/26/2023]
Abstract
Solar-driven interfacial vaporization by localizing solar-thermal energy conversion to the air-water interface has attracted tremendous attention. In the process of converting solar energy into heat energy, photothermal materials play an essential role. Herein, a flexible solar-thermal material di-cyan substituted 5,12-dibutylquinacridone (DCN-4CQA)@Paper was developed by coating photothermal quinacridone derivatives on the cellulose paper. The DCN-4CQA@Paper combines desired chemical and physical properties, broadband light-absorbing, and shape-conforming abilities that render efficient photothermic vaporization. Notably, synergetic coupling of solar-steam and solar-electricity technologies by integrating DCN-4CQA@Paper and the thermoelectric devices is realized without trade-offs, highlighting the practical consideration toward more impactful solar heat exploitation. Such solar distillation and low-grade heat-to-electricity generation functions can provide potential opportunities for fresh water and electricity supply in off-grid or remote areas.
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Affiliation(s)
- Meihua Shen
- Key Laboratory of Forest Plant Ecology Ministry of Education Engineering Research Center of Forest Bio-Preparation College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, P.R. China
| | - Xinpeng Zhao
- Key Laboratory of Bio-based Material Science and Technology, Ministry of Education School of Materials Science and Engineering, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, P.R. China
| | - Lu Han
- Technology Center for China Tobacco Henan Industrial Limited Company, Zhengzhou, 450000, P.R. China
| | - Nanxi Jin
- School of Life Engineering, Sung Kyun Kwan University, Seoul, Korea
| | - Song Liu
- Key Laboratory of Forest Plant Ecology Ministry of Education Engineering Research Center of Forest Bio-Preparation College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, P.R. China
| | - Tao Jia
- Key Laboratory of Forest Plant Ecology Ministry of Education Engineering Research Center of Forest Bio-Preparation College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, P.R. China
| | - Zhijun Chen
- Key Laboratory of Bio-based Material Science and Technology, Ministry of Education School of Materials Science and Engineering, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, P.R. China
| | - Xiuhua Zhao
- Key Laboratory of Forest Plant Ecology Ministry of Education Engineering Research Center of Forest Bio-Preparation College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, P.R. China
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16
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Yang R, Liu F, Xia L, Wu X, Zhang X, Guo F, Yu Y. Rattan-based solar evaporator with natural hierarchical and gradient pore structure for synergetic salt resistance and stable freshwater generation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120412] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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17
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Dong X, Li H, Gao L, Chen C, Shi X, Du Y, Deng H. Janus Fibrous Mats Based Suspended Type Evaporator for Salt Resistant Solar Desalination and Salt Recovery. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2107156. [PMID: 35146894 DOI: 10.1002/smll.202107156] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 01/14/2022] [Indexed: 06/14/2023]
Abstract
Solar desalination has been recognized as an emerging strategy for solving the pressing global freshwater crisis. However, salt crystallization at the photothermal interface frequently causes evaporator failure. In addition, arbitrary discharge of concentrated brine produced during desalination results in potential ecological impacts as well as wastage of valuable minerals. In the present work, a suspended-type evaporator (STEs) constructed using Janus fibrous mats is reported. The fibrous structure wicks brine to the evaporation layer and the salt gets confined in the evaporation layer until crystallization for zero liquid discharge due to the suspended design. Enhanced evaporation is observed because STEs have an additional low-resistance vapor escape path directly from the evaporation layer to the atmosphere compared to traditional floating Janus evaporators. Moreover, owing to the drastically different wettability on both sides, the evaporator allows salt crystallization only on the hydrophilic bottom layer, thus eliminating salt accumulation at the hydrophobic photothermal interface. With this unique structural design, the proposed evaporator not only maintains a high evaporation rate of 1.94 kg m-2 h-1 , but also demonstrates zero liquid discharged salt resistance and ideal recovery of the mineral in brine.
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Affiliation(s)
- Xiangyang Dong
- Hubei Key Laboratory of Biomass Resource Chemistry and Environmental Biotechnology, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, School of Resource and Environmental Science, Wuhan University, Wuhan, 430079, China
| | - Hao Li
- Hubei Key Laboratory of Biomass Resource Chemistry and Environmental Biotechnology, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, School of Resource and Environmental Science, Wuhan University, Wuhan, 430079, China
| | - Lingfei Gao
- Hubei Key Laboratory of Biomass Resource Chemistry and Environmental Biotechnology, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, School of Resource and Environmental Science, Wuhan University, Wuhan, 430079, China
| | - Chaoji Chen
- Hubei Key Laboratory of Biomass Resource Chemistry and Environmental Biotechnology, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, School of Resource and Environmental Science, Wuhan University, Wuhan, 430079, China
| | - Xiaowen Shi
- Hubei Key Laboratory of Biomass Resource Chemistry and Environmental Biotechnology, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, School of Resource and Environmental Science, Wuhan University, Wuhan, 430079, China
| | - Yumin Du
- Hubei Key Laboratory of Biomass Resource Chemistry and Environmental Biotechnology, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, School of Resource and Environmental Science, Wuhan University, Wuhan, 430079, China
| | - Hongbing Deng
- Hubei Key Laboratory of Biomass Resource Chemistry and Environmental Biotechnology, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, School of Resource and Environmental Science, Wuhan University, Wuhan, 430079, China
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18
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Chen L, Wei J, Tian Q, Han Z, Li L, Meng S, Hasi QM. Dual-Functional Graphene Oxide-Based Photothermal Materials with Aligned Channels and Oleophobicity for Efficient Solar Steam Generation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:10191-10199. [PMID: 34370488 DOI: 10.1021/acs.langmuir.1c01647] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Desalination by solar steam generation (SSG) has emerged as one of the most efficient approaches to address the issue of global water shortage. In this work, novel graphene oxide (GO)-based solar steam generators (GO-SSGs) with aligned channels were prepared by directional freezing and simple carbonization of a hydrogel composed of GO and poly(vinyl alcohol) (PVA). Benefitting from their excellent light absorption (light absorption efficiency exceeds 94%), better thermal insulation (thermal conductivity, 0.259 W/(m K)), and suitable porous structure, which facilitates rapid water transportation, the GO-SSGs show superior SSG performance with a high solar energy conversion efficiency of up to 92% achieved under an irradiation of 1.0 kW/m2. Interestingly, uniquely aligned channels endow them with good salt-rejection performance; the solar energy conversion efficiency of GO-SSGs in 20 wt % NaCl, KCl, and MgCl2 brine can reach more than 85%. To improve their antifouling performance, a chemically hydrophilic and oleophobic modification was conducted, making it possible to run SSG even in oily wastewater; for instance, a solar energy conversion efficiency of 84% was obtained in an aqueous solution containing 10 wt % n-hexadecane. Compared with the existing photothermal materials, these materials show advantages of simple manufacture, high SSG efficiency, superior salt tolerance, and antifouling performance, which make them promising candidates as a kind of new high-performance photothermal materials for desalination even in oily wastewater, thus further expanding the scope of their practical SSG application.
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Affiliation(s)
- Lihua Chen
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, College of Chemical Engineering, Northwest Minzu University, Lanzhou, Gansu 730030, P. R. China
| | - Jing Wei
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, College of Chemical Engineering, Northwest Minzu University, Lanzhou, Gansu 730030, P. R. China
| | - Qi Tian
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, College of Chemical Engineering, Northwest Minzu University, Lanzhou, Gansu 730030, P. R. China
| | - Zhichao Han
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, College of Chemical Engineering, Northwest Minzu University, Lanzhou, Gansu 730030, P. R. China
| | - Li Li
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, College of Chemical Engineering, Northwest Minzu University, Lanzhou, Gansu 730030, P. R. China
| | - Shujuan Meng
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, College of Chemical Engineering, Northwest Minzu University, Lanzhou, Gansu 730030, P. R. China
| | - Qi-Meige Hasi
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, College of Chemical Engineering, Northwest Minzu University, Lanzhou, Gansu 730030, P. R. China
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