Design of self-righting steam generators for solar-driven interfacial evaporation and self-powered water wave detection

Chen, Guoliang; Li, Na; He, Jintao; Qiao, Lifang; Li, Fangbin; Wang, Shuxue; Yu, Liangmin; Murto, Petri; Li, Xiaohua; Xu, Xiaofeng

doi:10.1039/d0ta09773j

Cited by 36 publications

(24 citation statements)

References 61 publications

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“…Figure 3c shows a comparative analysis of the increase in the temperature of bulk water and IPNF solar evaporator under 1 sun illumination (1 kW m −2 ). The maximum temperature achieved by the IPNF evaporating structure was up to 49.5 °C under 1 kW m −2 , which is comparatively high as compared with recent solar evaporating structures, [ 36,37 ] and it shows excellent heat accumulation and better thermal insulation to avoid heat conduction into bulk water. This remarkable interfacial heat localization provides its potential as a promising solar‐driven evaporation structure, as well as thermal pack applications.…”

Section: Resultsmentioning

confidence: 94%

Intensifying Solar Interfacial Heat Accumulation for Clean Water Generation Excluding Heavy Metal Ions and Oil Emulsions

et al. 2021

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Solar‐driven interfacial steam generation has emerged as an innovative technique for seawater desalination due to its high photothermal conversion efficiency and potential industrial applications. Herein, a superior interfacial heat accumulation structure composed of semiconductive in situ polymerization (polypyrrole) of nickel foam (IPNF) is reported. The IPNF photothermal layer is assembled with superhydrophilic polyurethane substrate for synchronous water transport and excellent thermal insulation. The 2D ultrablack mesh induces multiple incident rays within the diffused polymerized surface, which allows omnidirectional solar absorption (88.5 %) and intensifying heat localization (49.5 °C @ 1 sun). The state‐of‐the‐art evaporation performances reveal that the integrated IPNF solar evaporator exhibits an excellent evaporation rate (1.74 kg m−2 h−1) and solar‐to‐vapor conversion efficiency (90% excluding heat losses) under 1 kW m−2 solar intensity. Besides this, the long‐term evaporation experiments show negligible discrepancy under seawater conditions (13.27 kg m−2/8 h under 1 kW m−2) and engrain its functioning potential for multimedia and salt rejection (3.2 g × NaCl/240 min). More importantly, herein, insights into different water states in the polymeric network systems during solar‐driven evaporation are provided. This work shows a significant potential to generate freshwater excluding heavy metals and other oil emulsions for industrial applications.

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Section: Resultsmentioning

confidence: 94%

Intensifying Solar Interfacial Heat Accumulation for Clean Water Generation Excluding Heavy Metal Ions and Oil Emulsions

et al. 2021

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“…In the natural environment, the instability of TENG energy acquisition and output restricts its application and development. As shown in Figure 6a, Yu et al [45] proposed gravity TENG, which can convert wind energy into stable electric energy and can realize the stable collection of natural wind energy. Poisonous gas in the living environment can seriously damage human health, so the poisonous gas monitoring device with an early warning function is of great significance.…”

Section: Application Of Teng In Environmental Monitoringmentioning

confidence: 99%

Recent Progress in Self-Powered Sensors Based on Triboelectric Nanogenerators

Yang

2021

Sensors

Self Cite

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The emergence of the Internet of Things (IoT) has subverted people’s lives, causing the rapid development of sensor technologies. However, traditional sensor energy sources, like batteries, suffer from the pollution problem and the limited lifetime for powering widely implemented electronics or sensors. Therefore, it is essential to obtain self-powered sensors integrated with renewable energy harvesters. The triboelectric nanogenerator (TENG), which can convert the surrounding mechanical energy into electrical energy based on the surface triboelectrification effect, was born of this background. This paper systematically introduces the working principle of the TENG-based self-powered sensor, including the triboelectrification effect, Maxwell’s displacement current, and quantitative analysis method. Meanwhile, this paper also reviews the recent application of TENG in different fields and summarizes the future development and current problems of TENG. We believe that there will be a rise of TENG-based self-powered sensors in the future.

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“…[2] In recent years, water desalination at the evaporator interface through solar energy, the largest available and green energy resource released by the sun, to obtain freshwater, has been regarded as a considerable and sustainable means to ease the water crisis. [3,4] With the evaporator design from micro or nano particles [5,6] and 2D planes [7][8][9][10][11][12] to 3D structures, [13][14][15][16][17][18] the concept of interfacial solar heat localization has been proved to be the most effective approach to fully utilize the solar energy and reduce the heat loss as possible, with improved evaporation rate and energy conversion efficiency. [19][20][21] For practical application, it is necessary to further improve the salt-rejecting properties of solar evaporators.…”

Section: Introductionmentioning

confidence: 99%

3D Printing a Biomimetic Bridge‐Arch Solar Evaporator for Eliminating Salt Accumulation with Desalination and Agricultural Applications

et al. 2021

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Solar‐driven water evaporation has been considered a sustainable method to obtain clean water through desalination. However, its further application is limited by the complicated preparation strategy, poor salt rejection, and durability. Herein, inspired by superfast water transportation of the Nepenthes alata peristome surface and continuous bridge‐arch design in architecture, a biomimetic 3D bridge‐arch solar evaporator is proposed to induce Marangoni flow for long‐term salt rejection. The formed double‐layer 3D liquid film on the evaporator is composed of a confined water film for water supplementation and a free‐flowing water film with ultrafast directional Marangoni convection for salt rejection, which functions cooperatively to endow the 3D evaporator with all‐in‐one function including superior solar‐driven water evaporation (1.64 kg m‐2 h‐1, 91% efficiency for pure water), efficient solar desalination, and long‐term salt‐rejecting property (continuous 200 h in 10 wt% saline water) without any post‐cleaning treatment. The design principle of the 3D structures is provided for extending the application of Marangoni‐driven salt rejection and the investigation of structure‐design‐induced liquid film control in the solar desalination field. Furthermore, excellent mechanical and chemical stability is proved, where a self‐sustainable and solar‐powered desalination–cultivation platform is developed, indicating promising application for agricultural cultivation.

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Design of self-righting steam generators for solar-driven interfacial evaporation and self-powered water wave detection

Abstract: Solar-driven interfacial evaporation, desalination and self-powered water wave detection are synergistically achieved by developing a self-righting steam generator with a tumbler-shaped monolithic structure.

Cited by 36 publications

References 61 publications

Intensifying Solar Interfacial Heat Accumulation for Clean Water Generation Excluding Heavy Metal Ions and Oil Emulsions

Intensifying Solar Interfacial Heat Accumulation for Clean Water Generation Excluding Heavy Metal Ions and Oil Emulsions

Recent Progress in Self-Powered Sensors Based on Triboelectric Nanogenerators

3D Printing a Biomimetic Bridge‐Arch Solar Evaporator for Eliminating Salt Accumulation with Desalination and Agricultural Applications

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