GEOFLUIDS
·
2020
·
IF 1.534
Xiaolin Wang,Ye Qiu,I-Ming Chou,Rongqing Zhang,Guanglai Li,Richen Zhong
In situ Raman spectra of aqueous K2WO4-HCl, K2WO4-HCl-NaCl, and K2WO4-CO2-NaCl solutions were collected at elevated temperature (, 100–400°C) and constant pressure () of 30 MPa. The stretching vibration band of the W=O bond () was analyzed to reveal the species of tungsten (W) responsible for the hydrothermal transport of W during mineralization. Results showed that monomeric tungstates with (W=O) bands at ~930 and 950 cm-1 are the dominant W species in weakly alkaline (room temperature, ) to near-neutral (room temperature, ) solutions under the investigated conditions. Overall, the stability of polymeric tungstate species with (W=O) bands at ~965–995 cm-1 decreases with rising temperature and was not detected at ≥300°C in moderately acidic solution (room temperature, ). However, increased fluid acidity and salinity obviously enlarged the temperature stability field of polymeric tungstate species. In highly acidic solution (room temperature, ), polymeric tungstates are the only stable W species even at 400°C. In the presence of 1.9 mol/kg NaCl, polymeric tungstate(s) can persist to at least 350°C in moderately acidic solution. Considering that 300–350°C is the major W-mineralizing range and W-mineralizing fluid is generally characterized by a moderately acidic nature, we propose that, in addition to monomeric tungstates, polymeric tungstates can also be important W species in some natural geological fluids that are responsible for the mineralization of W. Future studies of the W mineralization mechanism should take this issue into account.
研究领域:
地球化学
·
矿物学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Wenshuang Tian,Xiong Zheng,Yang Xiao,Guangzhao Qin
Photovoltaic (PV) power generation technology is currently one of the most effective ways in solar energy utilization, while current PV panels are facing a serious issue of electrical efficiency reduction and potential structural damage caused by the accumulated heat during operation. To solve this issue, we proposed a novel hybrid system containing PV cell, thermoelectric generation (TEG) module, and phase change composite (PCC), which can achieve a power enhancement of 29.8 % compared with individual PV cell. The fabricated chitosan-based PCC has a high anisotropy degree of 4.10 and melting enthalpy of 133.2 kJ·kg −1 , which promote the effective heat transport and storage between PV cell and TEG module, and the excellent mechanical strength and thermal stability ensures its long-term endurance. Owing to excellent thermal properties of the PCC, not only the power of PV cell is increased by 55.9 mW, but the TEG module also continuously outputs 4.1 mW of power. Besides, the hybrid system can produce 5.185 kW·h·m −2 electricity per day in the actual environment. Looking ahead, the integration of advanced materials and hybrid systems like the PV + PCC + TEG approach holds great promise for further enhancing solar energy efficiency and sustainability in real-world applications.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS ES&T Engineering
·
2025
·
IF 6.7
Shuai Peng,Longqian Xu,Shihai Deng,Chengsi Hou,Yue Wang,Zuofeng Chen,Zhendong Lei,Deli Wu
Flexible water management textiles can achieve effective liquid-thermal evaporation by harvesting exogenous heat. However, existing textiles exhibit limited evaporation capacity and cooling efficiency due to undesirable water-heat transport structures. Inspired by the human skin’s efficient heat dissipation mechanism through sweat evaporation, we propose an integrated multiheat source evaporation module concept. The interpenetrating structure of disperse fibers and porous conductive pores endows this material with synergistically enhanced radial water diffusion rate and thermal energy transmission efficiency, as validated by the infrared droplet diffusion tests and solute diffusion models. Compared to traditional nonwoven fabric, the integrated evaporation module-3 exhibits stable and lower “rebound low temperature values” in 120 consecutive evaporation cycles, with a peak temperature difference of 5.43 °C. The performance efficiency per unit of water evaporation is increased by over 100%, and the thermal diffusion coefficient along the thickness gradient is increased by 20 times. By integrating reduced graphene oxide photothermal conversion media, the device is entirely driven by solar thermal energy, achieving an evaporation rate of ∼1.45 kg m–2 h–1. Notably, dynamic temperature difference tracking tests validate the potential of this integrated structure in solar-driven multistage passive evaporation systems and its flexibility for deployment on complex heater surfaces (such as human skin). We anticipate that the integrated module concept will provide promising design guidelines for next-generation high-efficiency multiheat source management components.
CAS / MDL:
研究领域:
材料科学
·
热能工程
·
纺织科学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2025
·
IF 17.1
Yue Liu,Chujia Xu,Xintao Xie,Tingkai Wang,Xianfeng Xie,Jianyong Ye,Jia Wang,Sheng Zhuo,Jiang Xu,Weifan Chen
Optimization of energy-mass transport in solar desalination devices is essential for controlling the yield of freshwater and energy consumption. However, complex application environments make it challenging to clarify the coordinated patterns of water transfer and heat utilization under the coexistence of multiple mechanisms. Here, a biomimetic solar desalination device with gradient wettability and variable water supply angles is introduced, drawing inspiration from the natural growth of tree branches and leaves. This design effectively leverages the distinct longitudinal water transport capabilities of Janus sponge leaves, which exhibit double-sided super hydrophilicity and single-sided weak or strong hydrophobicity, resulting in varied water accumulation volumes and locations. Simulation and the synchronous optimization of leaf inclination angles are employed to visualize the water-heat transfer and its distribution, revealing the equilibrium principle between water flow and heat consumption. Based on theoretical assessments, the ambient light intensity required for better performance release is configured for each leaf. This holistic and nuanced tuning results in an evaporation rate of 2.98 kg m −2 h −1 , showcasing stable tolerance to high-concentration brines and adaptability to outdoor conditions. This approach transcends the constraints of conventional single-variable regulation, presenting an innovative avenue for the design of energy-mass management systems in solar desalination technology.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Cao Yuanhang,Wang Jiemin,Guan Weixin,An Meng,Yan Peng,Li Zhengtong,Zhao Changsheng,Yu Guihua
Interfacial solar-driven evaporation has attracted great research interests, given its high conversion efficiency of solar energy and transformative industrial potential for desalination. However, current evaporators with porous volume remain critical challenges by inherently balancing efficient fluid transport and effective heat localization. Herein, we propose the strategy and design of lightweight, flexible and monolayered fluidic diode membrane-based evaporators, featuring regularly arrayed macropores and dense nanopores on each side. Such a delicate microstructure offers universality in establishing asymmetric channels along macroporous-to-nanoporous to enable the diode-like directional water transport as well as facilitate the heat localization on the nanopores side. Consequently, a high evaporation rate of a maximum 3.82 kg m −2 h −1 can be achieved under 1 sun illumination, exceeding most 2D and 3D evaporators. Besides, the durability and practicability of our evaporators are validated through salt resistance tests, purification experiments among various contaminants, and outdoor evaluations. Moreover, the structure engineering and water-transport optimization of fluidic diode membranes also offer potentials for hydrovoltaic applications, with over 1.6 V generated by tandem devices at the ambient environment. This work provides a concept for designing high-performance monolayered membranes applicable in environmental and energy-related realms.
研究领域:
材料科学
·
环境工程
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2023
·Vol. 10
·期 12
·2201687
·
IF 5.4
Feiyu Zheng,Qingchen Shen,Zhiying Wang,Weizheng Cheng,Ruitong Wang,Cheng Fang,Ben Chu,Jinran Tao,Wanli Zhang,Peng Tao,Chengyi Song,Wen Shang,Benwei Fu,Tao Deng
Graphene-based composites show great potential in the development of lightweight functional devices and systems, and polymers are usually used as binders to enhance the mechanical properties of these composites. Due to the low thermal conductivity of the polymer and the high inherent interfacial thermal resistance between polymer and graphene, however, the developed devices and systems generally possess low thermal conductivity, which seriously limits their further thermal-related applications. Here, a lightweight two-phase heat transport device (TPHTD) based on a vapor-liquid phase transition-based heat transfer by using a graphene-based composite material as the casing is generated. The graphene-based TPHTD has high thermal conductivity of up to 1408 W (mK) −1 and realizes ultra-high specific thermal conductivity of ≈5600 W (mKg) −1 . This graphene-based device with lightweight and high heat transfer capacity offers new opportunities for efficient thermal management of compact, portable, or wearable electronic and power systems.
研究领域:
材料科学
·
热能工程
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
SCRIPTA MATERIALIA
·
2023
·
IF 6
Zhili Li,Jiye Zhang,Shaoqin Wang,Zirui Dong,Chen Lin,Jun Luo
Ductile Ag 2 S 0.4 Te 0.6 shows promising thermoelectric properties and interesting phase transitions and structural features above room temperature. In this work, our experiments reveal that Ag 2 S 0.4 Te 0.6 is composed of a Ag 2 Te-based glass and a Ag 2 S-based supercooled liquid at room temperature. The Ag 2 Te-based glass preserves its amorphous state in the measured temperature range (20–303 K), while the Ag 2 S-based supercooled liquid crystallizes into a triclinic phase below 183 K, leading to respectively the glass and crystalline-like thermal transport of Ag 2 S 0.4 Te 0.6 near room temperature and at low temperature. At the crystallization point of the Ag 2 S-based phase, the electrical conductivity of Ag 2 S 0.4 Te 0.6 shows an anomalous change. The extremely wide supercooling region (183–420 K) of the Ag 2 S-based phase leads to the unprecedented ductility of Ag 2 S 0.4 Te 0.6 . The thermoelectric figure of merit zT of Ag 2 S 0.4 Te 0.6 increases monotonically with increasing temperature and reaches ∼0.17 at 300 K, showing the great potential as a ductile thermoelectric inorganic.
研究领域:
材料科学
·
热电学
·
固体物理学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2022
·Vol. 14
·期 27
·9743-9753
·
IF 8.307
Yandong Wang,Xianzhe Wei,Huiwu Cai,Bin Zhang,Yapeng Chen,Maohua Li,Yue Qin,Linhong Li,Xiangdong Kong,Ping Gong,Huanyi Chen,Xinxin Ruan,Chengcheng Jiao,Tao Cai,Wenying Zhou,Zhongwei Wang,Kazuhito Nishimura,Cheng-Te Lin,Nan Jiang,Jinhong Yu
For effective heat dissipation in portable electronics, there is a great demand for lightweight and flexible films with superior thermal transport properties. Despite extensive efforts, enhancing the intrinsic low thermal conductivity of polymers while simultaneously maintaining their flexibility is difficult to achieve due to the dilemma of quarrying appropriate filler loading. Herein, a cellulose nanofiber-based film with high in-plane thermal conductivity up to 72.53 W m−1 K−1 was obtained by harnessing the advantage of functionalized boron nitride nanosheets (f-BNNS) and black phosphorene (BP) via the vacuum filtration process. Besides, our unique design based on the electrostatic coupling of black phosphorene and functionalized boron nitride nanosheets significantly reduced the interfacial thermal resistance of the composite films. This work offers new insights into establishing a facile, yet efficient approach to preparing high thermal conductive heat spreaders.
研究领域:
材料科学
·
热工程
·
纳米技术
·
复合材料
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Weifang Han,Mengyuan Chen,Wei Song,Chunhua Ge,Xiangdong Zhang
Hexagonal boron nitride (BN) hold great promise as emerging building blocks for thermal interface materials owing to their outstanding heat transfer performance. Herein, we report a carboxylated polystyrene-coated hydroxylated BN (BN–OH@PS-COOH) nanocomposite with highly thermal conductivity (TC) and extraordinary mechanical properties for thermal management. The exfoliated BN-OH nanosheets were obtained via molten alkali hydroxide pretreatment and sonication. Subsequently, PS-COOH nanospheres were grew on the surface of BN-OH nanosheets by in situ polymerization. Noncovalent interactions between PS-COOH and BN-OH are favor to reduce interfacial thermal resistance, which contributes to accelerate heat transport . As a result, the TC of the resultant BN-OH@PS-COOH nanocomposite with 12 wt% BN-OH addition is 1.131 W/mK, which is much higher than that of neat PS (0.186 W/mK) and BN/PS blend nanocomposite (0.312 W/mK). Moreover, the BN-OH@PS-COOH nanocomposite exhibits outstanding mechanical properties. Our study may stimulate novel perspectives on the design of high-performance polymer-based thermal interface materials.
研究领域:
材料科学
·
热工程
·
高分子科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Tian-Cai Sun,Xu-Chao Ning,Seeram Ramakrishna,Yun-Ze Long,Jun Zhang
There is a higher risk of injury for athletes when the intensive competition occurs. Minimally invasive surgery is still the first choice for athletes because of its small wound surface and fast recovery. In addition, knowing whether athletes recover in real time at the first time is beneficial for the athletes to return to the competition as soon as possible and maintain their peak performance. We developed a medical hydrogel to meet the dual needs of minimally invasive therapy and wearable testing. A novel ε-PL/PVP/MXene (εPM) hydrogel with spatio-temporal control and in situ enhancement was prepared by the concept of microchemical reaction cavity. MXene was introduced as the microchemical reaction center, and the dual effects of heat transport and microcatalysis were utilized to make the gel network uniform and moldability after injection in vivo, so as to realize the filling and treatment of irregular wounds. The hydrogel tissue is not only adhesive, self-healing and soft, but also super tough, keeping its shape stable under repeated stretches, intense hammering, continuous trampling, and even the extremely catastrophic impact of being run over 50 times by a car. At the same time, the hydrogel has excellent ionic conductivity (4.12 S/m) and sensing ability, which can record athletes' movement characteristics in real time and transmit them to doctors through wireless Bluetooth, so as to make accurate judgment on the recovery of health. This is the first exploration of the combination of hydrogel in the field of minimally invasive therapy and wearable devices, which opens up a new avenue for efficient minimally invasive therapy and accurate rehabilitation monitoring.
研究领域:
生物医学工程
·
材料科学
·
运动医学
·
可穿戴技术
✓ 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）