Nano-Micro Letters
·
2024
·Vol. 16
·期 1
·1-16
·
IF 31.6
Lei Leqi,Meng Shuo,Si Yifan,Shi Shuo,Wu Hanbai,Yang Jieqiong,Hu Jinlian
Engineering MXene into electrospun nanofibers can effectively enhance its thermal emissivity and conductance, and the unidirectional water transport of the wettability-gradient-induced-diode (WGID) membrane displayed diode-like properties with wettability gradient by tailoring the water contact angle of each single layer.
The WGID membrane could achieve a cooling temperature of 1.5 °C in the “dry” state, and 7.1 °C in the “wet” state, with high emissivity of 96.40% in the MIR range, superior thermal conductivity of 0.3349 W m −1 K −1 .
Zero-energy-consumption for personal cooling management via multiple heat dissipation pathways, including thermal radiation, conduction, and evaporation.
研究领域:
材料科学
·
热管理工程
·
表面科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Photonics
·
2021
·
IF 7.529
Zhen Fang,Liyun Ding,Lintao Li,Kun Shuai,Boyu Cao,Yetao Zhong,Zhenghua Meng,Zhilin Xia
Thermal homeostasis can maintain body temperature of warm-blooded organisms in a narrow range to avoid hypothermia, ensuring the normal operation of life activities. Thermal homeostasis can make the internal temperature of target relatively insensitive to temperature changes of surrounding environment, which is of great significance to the efficient operation of equipment and the service life of material. The current systems that maintain thermal homeostasis need to consume electricity, which is very detrimental to energy consumption and global warming. Here, we propose a novel thermal homeostasis program by means of tunable sunlight-scattering behaviors of thermochromic hydrogel, without external energy input such as electrical energy and mechanical energy. A sandwich structure thermal homeostasiser (SSTH) generated by the thermal homeostasis program consists of three parts: the radiative cooling part at the top, the thermochromic part in the middle and the solar heating part at the bottom. The feasibility of thermal homeostasis based on SSTH has been verified theoretically and experimentally. With the ambient air temperature difference of more than 6 °C, SSTH can maintain its own temperature difference within 1.2 °C. The SSTH is a simple-feasible paradigm for achieving thermal homeostasis. This new thermal homeostasis method we proposed can fill the vacancy of the current thermal homeostasis control means and show great potential as a complementary mean of the existing building environment control system to go a step further toward zero-energy building.
研究领域:
材料科学
·
能源科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2022
·Vol. 119
·期 38
·e2207353119
·
IF 12.779
Quan Zhang,Yufeng Wang,Yiwen Lv,Shixiong Yu,Rujun Ma
Radiative thermal management provides a zero-energy strategy to reduce the demands of fossil energy for active thermal management. However, whether solar heating or radiative cooling, one-way temperature control will exacerbate all-season energy consumption during hot summers or cold winters. Inspired by the Himalayan rabbit’s hair and Mimosa pudica’s leaves, we proposed a dual-mode thermal-management device with two differently selective electromagnetic spectrums. The combination of visible and infrared “thermochromism” enables this device to freely switch between solar heating and radiative cooling modes by spontaneously perceiving the temperature without any external energy consumption. Numerical prediction shows that a dual-mode device exhibits an outstanding potential for all-season energy saving in terms of thermal management beyond most static or single-wavelength, range-regulable, temperature-responsive designs. Such a scalable and cost-efficient device represents a more efficient radiative thermal-management strategy toward applying in a practical scenario with dynamic daily and seasonal variations.
研究领域:
材料科学
·
能源工程
·
仿生学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Cunjun Wang,Yongqiang Chen,Yubo Liu,Baozhong Ma,Chengyan Wang
Recycling cadmium from wastewater not only mitigates environmental risks but also offers economic benefits. However, conventional zinc powder cementation is hindered by excessive zinc consumption and the generation of low-purity cadmium sludge. In this study, we proposed a galvanic cell system composed of a zinc plate coupled with a stainless steel plate, replacing zinc powder as the reductant. Under optimized conditions, the system achieved 99.8 % cadmium removal, with a recovered cadmium purity exceeding 90 %. Mechanistic insights derived from kinetic modeling and electrochemical analysis revealed that cadmium deposition was governed by a mixed control mechanism involving both mass transfer and interfacial reaction. The stainless steel plate provided additional cathodic reduction sites and established a natural potential difference together with the zinc anode. This galvanic interaction promoted active zinc dissolution and facilitated preferential cadmium deposition. Meanwhile, microstructural analysis confirmed the formation of a loose, dendritic cadmium layer, which prevented surface encapsulation and promoted favorable mass transfer conditions for sustained cementation. Compared to traditional zinc powder cementation, this approach eliminates the need for external energy input, reduces zinc consumption, and avoids the generation of hazardous sludge. These findings demonstrate a clean, efficient, and scalable strategy for the removal and recovery of cadmium from wastewater.
研究领域:
环境科学
·
环境工程
·
电化学
·
重金属污染控制
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资源回收
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 18
·2209897
·
IF 29.4
Hao Yuan,Ruojuan Liu,Shuting Cheng,Wenjuan Li,Mingyang Ma,Kewen Huang,Junliang Li,Yi Cheng,Kun Wang,Yuyao Yang,Fushun Liang,Ce Tu,Xiaobai Wang,Yue Qi,Zhongfan Liu
Solar heating and radiative cooling techniques have been proposed for passive space thermal management to reduce the global energy burden. However, the currently used single-function envelope/coating materials can only achieve static temperature regulation, presenting limited energy savings and poor adaption to dynamic environments. In this study, a sandwich-structured fabric, composed of vertical graphene, graphene glass fiber fabric, and polyacrylonitrile nanofibers is developed, with heating and cooling functions integrated through multiband, synergistic, (solar spectrum and mid-infrared ranges) and asymmetric optical modulations on two sides of the fabric. The dual-function fabric demonstrates high adaption to the dynamic environment and superior performance in a zero-energy-input temperature regulation. Furthermore, it demonstrates ≈15.5 and ≈31.1 MJ m −2 y −1 higher annual energy savings compared to those of their cooling-only and heating-only counterparts, corresponding to ≈173.7 MT reduction in the global CO 2 emission. The fabric exhibits high scalability for batch manufacturing with commercially abundant raw materials and facile technologies, providing a favorable guarantee of its mass production and use.
研究领域:
材料科学
·
纳米技术
·
能源材料
·
环境工程
·
纺织工程
·
光热调控
✓ 已验证
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-10
·
IF 17.694
Zhang Quan,Lv Yiwen,Wang Yufeng,Yu Shixiong,Li Chenxi,Ma Rujun,Chen Yongsheng
Reducing needs for heating and cooling from fossil energy is one of the biggest challenges, which demand accounts for almost half of global energy consumption, consequently resulting in complicated climatic and environmental issues. Herein, we demonstrate a high-performance, intelligently auto-switched and zero-energy dual-mode radiative thermal management device. By perceiving temperature to spontaneously modulate electromagnetic characteristics itself, the device achieves ~859.8 W m −2 of average heating power ( ∼ 91% of solar-thermal conversion efficiency) in cold and ~126.0 W m −2 of average cooling power in hot, without any external energy consumption during the whole process. Such a scalable, cost-effective device could realize two-way temperature control around comfortable temperature zone of human living. A practical demonstration shows that the temperature fluctuation is reduced by ~21 K, compared with copper plate. Numerical prediction indicates that this real zero-energy dual-mode thermal management device has a huge potential for year-round energy saving around the world and provides a feasible solution to realize the goal of Net Zero Carbon 2050.
研究领域:
热能工程
·
能源效率
·
可再生能源
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Advances
·
2024
·
IF 5.2
Kaifen Yan,Weifeng Zhang,Xue Feng,Weiyun Zhao,Lingling Wu,Yuan Deng
Heat dissipation is critical for energy efficiency; high operating temperatures can even cause electronic device failure. Herein, a high heat dissipation strategy is proposed and applied to a passive composite heat sink (CHS) by combining a porous hydrogel with fin. The heat generated by the devices can be dissipated utilizing the evaporation latent heat of the water in the multi-scale porous hydrogel and the increased heat dissipation area of the composite finned structure. The heat transfer coefficient of the CHS can reach 60 W m−2 K−1, which is six times higher than that of natural convection and comparable to that of forced air convection. Moreover, rehydration can be achieved with zero energy consumption. The CHS is able to enhance the temperature difference of the thermoelectric generator (TEG) and improve the output performance by 4–10 times. In addition, it can lower the operating temperature of electronic devices and solar cells, which can be maintained at about 60 °C when the heat load is 10 W. As a result of excellent cooling performance and zero energy consumption properties, the CHS has potential applications in the fields of thermoelectric devices, electronic products, and solar photovoltaic power generation.
研究领域:
材料科学
·
热能工程
·
电子学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jing Gao,Liangyuan Qi,Liang Chen,Wenyue Guo,Bicheng Lin,Zefan Feng,Suhong Li,Yuan Hu,Fukai Chu,Weiyi Xing
The development of zero-power radiative cooling technology in buildings is of great significance for coping with global warming. However, the absorption of thermal radiation from the surrounding environment cannot be effectively avoided by conventional broadband emitters, resulting in cooling performance degradation. Furthermore, the fire safety standards established for architectural coatings are generally not met by conventional radiative cooling coatings. Here, the phosphorus flame retardants aluminum diethylphosphonate (ADP) was introduced into PVDF-HFP coating through a non-solvent-induced phase separation (NIPS) to enhance both the cooling performance and fire safety. The composite coating demonstrates excellent solar reflectance (97.4 %) and mid-infrared emissivity (95.7 %), owing to its unique hierarchical porous structure and the vibrational properties of C C, F-C-F, P O, and P O bonds. Therefore, compared to the absence of coatings, the porous coating significantly enhances the cooling effect, resulting in a temperature reduction of 6.6 °C in an outdoor cooling test. With the introduction of the flame retardant ADP, the temperature of composite coating decrease is further extended to 8.1 °C, accompanied by a remarkable cooling efficiency of 129.4 W/m 2 . Concurrently, the addition of ADP not only reduces the peak heat release rate during combustion (58.3 %) but also significantly inhibits the release of the total smoke product, thus greatly improving fire safety performance. The simplicity of this manufacturing process, coupled with its exceptional fire resistance and optical properties facilitates the practical implementation of radiative cooling materials in airports, buildings, grain silos, and other applications.
研究领域:
材料科学
·
建筑节能
·
环境科学
·
消防安全工程
·
纳米技术
·
光学工程
·
高分子科学
·
气候变化缓解
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）