Nano Energy
·
2019
·
IF 15.548
Zirui Lou,Dachao Yuan,Fengyu Zhang,Yichen Wang,Yaguang Li,Liping Zhu
CO oxidation is one of the most important catalytic reactions and it has to be run at relatively high temperature. Photothermal catalysis system could convert light as heat to drive CO oxidation rather than their conventional counterparts that use only thermal stimulus. But the light intensity required in this photothermal catalysis system is much higher than the solar intensity, restricting the application of photothermal CO oxidation. Here we present a Fe 3 Si based photothermal converted system to assist Co 3 O 4 rhombus-shaped nanorods catalysts for achieving efficient photothermal CO oxidation just under weak solar irradiation . Based on photothermal experiments, we conclude that Fe 3 Si based photo-thermal converted system can convert 0.3–0.35 kW m −2 solar irradiation into a temperature as high as 160 °C, 3 times higher than existing photothermal catalytic systems , which able to excite the activity of Co 3 O 4 rhombus-shaped nanorods for complete CO oxidation, solely irradiated by third of standard solar light and outdoor sunlight. The results suggested that the photothermal CO oxidation can be driven by ambient solar irradiation in the presence of Fe 3 Si based photothermal system and Co 3 O 4 rhombus-shaped nanorods, facilitating for industrial applications.
研究领域:
催化
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Ocean University of China
·
2020
·Vol. 19
·期 6
·1353-1361
·
IF 0.802
Chen Yan,Liu Shanshan,Yang Guipeng,He Zhen
Methyl iodide (CH 3 I) is an important trace greenhouse gas in the atmosphere and an ozone-depleting substance. The influence of different environmental factors, such as the duration of illumination; the strength of illumination; the concentrations of humic acid, ferric ion (Fe 3+ ), and iodide ion (I − ); and pH, on the photochemical production of CH 3 I in artificial seawater (ASW) were tested by simulated solar irradiation. In addition, Yangtze River Estuary waters from inshore to offshore were used to explore the relationship between the photochemical production of CH 3 I and different sources of dissolved organic matter (DOM) in natural sea-water (NSW). The results revealed that higher concentrations of humic acid and I − , as well as higher strengths of illumination and longer illumination durations, promoted the photochemical formation of CH 3 I in ASW. The addition of Fe 3+ accelerated the photochemical production of CH 3 I, but high concentrations of Fe 3+ inhibited the formation of CH 3 I. Experiments on NSW obtained from the Yangtze River estuary spiked when concentrations of DOM were high, confirming that DOM plays an important role in facilitating the photochemical production of CH 3 I within the Yangtze River Estuary. The photochemical production of CH 3 I in the seawater was significantly higher under light conditions relative to dark conditions, indicating that illumination accelerated the production of CH 3 I.
研究领域:
海洋学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Liang Xu,Da-Wen Sun,You Tian,Libin Sun,Tianhao Fan,Zhiwei Zhu
Excessive solar radiation and high temperature often cause considerable loss and waste of fruits during transportation, retail, and storage. In the current study, a natural deep eutectic solvent-based polyacrylamide/poly(vinyl alcohol) hydrogel with nanoparticles (NPs/NADES@PAAm/PVA) is developed for fruit quality protection from solar radiation and high-temperature stress by achieving the combined effect of radiative and evaporative cooling. NPs/NADES@PAAm/PVA presents an average solar reflectance of ∼0.89 and an average emittance at the atmospheric window of ∼0.90. Besides, NPs/NADES@PAAm/PVA possesses excellent flexibility, robust mechanical strength, and good swelling behavior. The fruit preservation experiments under sunlight demonstrate that the pear (Pyrus sinkiangensis) treated with NPs/NADES@PAAm/PVA can achieve an average temperature decrease of ∼15.3 °C after sun exposure compared with the blank, and its quality-related attributes, including color, total soluble solid, relative conductivity, and respiration rate, are similar to the fresh one. Multivariate data analyses, including principal component analysis and cluster analysis, further verify that the pear treated with NPs/NADES@PAAm/PVA possesses similar quality to the fresh one after sun exposure. Thus, NPs/NADES@PAAm/PVA has promising prospects for fruit transportation, retail, and storage under solar radiation in a low-operation-cost and sustainable manner.
研究领域:
农业科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Lu Zhang,Xin Qi,Hai-Yang Yu,Ting-Ting Li,Hong-Yang Wang,Ching-Wen Lou
Superhydrophobic surfaces can delay icing to a certain extent, but under severe conditions, such as extremely low temperatures and high humidity, ice buildup on their surfaces can still occur. Therefore, in this study, a titanium-based photothermal anti-/deicing fabric with a superhydrophobic surface was introduced, which was impregnated with hydrophobic SiO2-TiO2 Janus particles (H-SiO2-TiO2 JPs) and the silicone elastomer polydimethylsiloxane (PDMS) to endow it with superhydrophobic and photocatalytic properties, and then, titanium nitride nanoparticles (TiN NPs) were deposited on the surface of the cotton fabric to provide it with photothermal properties. A TiN-coated superhydrophobic cotton fabric (TiN-SCF) integrating self-cleaning, photothermal conversion, and photocatalysis was successfully prepared. The experimental data show that TiN-SCF has excellent superhydrophobicity (a contact angle of 159° when TiN is 2.2 wt % and H-SiO2-TiO2 JPs are 1.25 wt %). TiN-SCF can warm to 66.2 °C in 300 s under 1 kW/m2 simulated solar irradiation. The synergy of the photothermal effect and superhydrophobicity is good for anti-/deicing. TiN-SCF also has significant photocatalytic activity (64% Rhodamine B solution degradation in 6 h). The research results offer ideas and support to solve ice and pollution problems and are expected to promote industry development.
研究领域:
材料科学
·
纳米技术
·
表面工程
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光热转换
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催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2020
·
IF 8.208
Xueling Li,Huawei Chang,Lijian Zeng,Xianrong Huang,Yichao Li,Renfu Li,Zhaojun Xi
A newly direct absorption solar collector (DASC) based on MXene nanofluid is proposed herein. The excellent optical properties of MXene nanofluids are experimentally determined, and a three-dimensional steady-state numerical model is developed to investigate the synergistic effect of the optical properties of MXene nanofluids and the structural parameters of the DASC. The effects of volume flow rate, working temperature, and solar concentration ratio on the photothermal conversion performance of the DASC are also analyzed. The results show that the transmittance of the MXene nanofluid evidently decreases because of the enhanced absorption of solar radiation of MXene. With the addition of MXene, the photothermal conversion efficiency of the nanofluid rapidly increases and then slightly decreases. The optimal MXene mass fraction is inversely proportional to the collector height. A mere 100 ppm of MXene nanofluid can achieve a maximum intercept efficiency of 77.49%, which is 55.47% higher than that of the base fluid. This work demonstrates the potential for the application of MXene nanofluids in the utilization of solar energy.
研究领域:
能源科学
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材料科学
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数值分析
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
·
2017
·
IF 3.458
Meijie Chen,Yurong He,Jian Huang,Jiaqi Zhu
We herein investigate the solar photothermal conversion performances of Au nanofluids both experimentally and theoretically. In the experiments, the Au nanofluids are loaded into a beaker and are exposed to solar radiation. The solar photothermal conversion efficiency performances of the Au nanofluids using different nanoparticle (NP) volume fractions and solar intensities are discussed. Experimental results show that the equilibrium temperature increases as the NP volume fraction and solar intensity increase, although the extent of variation in the photothermal conversion efficiency declines under these conditions. Furthermore, a theoretical analysis based on the Rayleigh scattering approximation and the Beer-Lambert Law to predict the solar absorption efficiency is discussed. A good agreement between the calculated absorption efficiency and the experimental solar photothermal conversion efficiency is reported. The absorption efficiency increases exponentially with increasing collector height and NP volume fraction. Moreover, the optimization of NP selection and collector design for direct absorption solar collectors without consideration of the temperature field is of particular scientific importance.
研究领域:
材料科学
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太阳能技术
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纳米科技
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Research Letters
·
2019
·Vol. 14
·期 1
·1-13
·
IF 3.159
Tong Yanhua,Lai Shilian,Wu Fan,Guo Yuhua,Chen Haifeng,Pan Guoxiang,Sun Jingwei
ZnO porous nanosheets (PNSs) with partial surface modification were fabricated by means of depositing amorphous BiVO 4 on basic zinc carbonate nanosheets followed by calcining at 500 °C. At low levels of anchored amorphous BiVO 4 , the surface of ZnO PNSs was partially evolved into Bi 3.9 Zn 0.4 V 1.7 O 10.5 (BZVO). The measurements for photocurrent and photoluminescence demonstrate that partial-surface BZVO-modified ZnO PNSs (ZB_0.01) could significantly inhibit the recombination of photoinduced carriers. This should be ascribable to the driving from surface potential difference produced by non-junction part and vertical p-n BZVO/ZnO junction part on the surface of ZB_0.01. Furthermore, the photocatalytic efficiency in degradation of reactive brilliant red for ZB_0.01 under weak solar irradiation is about 8 times higher than that under strong visible-light illumination. The discussion regarding reasons for this enhancement demonstrates that each component in photocatalysts having rational valence-band maximum and conduction-band minimum energy levels is essential to obtain high-activity sunlight-driven catalysts.
研究领域:
材料科学
·
纳米技术
·
光催化
·
太阳能
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Yulian Chen,Fengmei He,Songwen Fang,Zhixiang Zhang,YongJin Zou,Cuili Xiang,Xiaojiang Mu,Lixian Sun,Fen Xu,Jianhua Zhou,Lei Miao
Interfacial solar-driven evaporation is considered an effective desalination technology to produce freshwater. However, salt accumulation severely slows or even stops water evaporation. In this study, a composite of porous carbon and MoS2 was loaded into a porous aerogel of poly(vinyl alcohol) (PVA)–chitosan (CS) by directed freezing to produce stable and salt-resistant interfacial evaporators. The obtained PVA–CS–C0.2–MoS2 composite aerogel (PC–C0.2M) exhibited excellent evaporation performance through the dual network structure of PC, which greatly facilitated water transport. In addition, the highly efficient absorbance (97.42%) of the porous carbon composite molybdenum disulfide (C0.2MoS2) also contributes to the efficient light-absorbing properties of PC–C0.2M. Thanks to its oriented porous structure, high light absorbance, and good wettability, PC–C0.2M achieved a water evaporation rate of 2.62 kg m–2 h–1 at 1 kW m–2 and a photothermal conversion efficiency of 92.14%. It also displayed outstanding salt resistance and can purify simulated seawater and dye-contaminated water. As a functional material capable of being used in multiple applications, aerogel material also serves as a support for loaded phase change materials through capillary forces and pore confinement. The excellent structure of PC–C0.2M provided a favorable carrier for the encapsulation of phase change materials (PCMs), which resulted in the enthalpy of melting and solidification of the PC–C0.2M composite paraffin wax (PW) PCM reaching 197.16 J g–1 and 206.42 J g–1, respectively. Furthermore, by combining aerogel with PCM, the evaporation rate of PC–C0.2M-co-PCM in a dark environment is 0.60 kg m–2 h–1, which is 2.22 times that of PC, enabling its excellent evaporation performance even at night. In summary, by exploiting PCMs to achieve rational utilization of solar thermal energy, the innovative integration of PCMs and photothermal materials in interface evaporation system provides a promising solution for evaporators to simultaneously achieve efficient energy storage and seawater desalination under intermittent solar radiation.
研究领域:
材料科学
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化学工程
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环境科学
·
能源技术
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Bingxin Liu,Jianzhi Liu,Yueqin Yu
In view of global warming and following fossil energy consumption caused by the using of heavy-loaded air conditioners, smart windows, which can intelligently regulate solar radiation, became a highly anticipated strategy to slow down the pressure. As most of the traditional hydrogel-based smart windows abruptly switch between transparent and opaque making a sudden change in temperature and light, we established a poly- N -isopropylacrylamide (PNIPAM) thermo-responsive hydrogel system with additional cross-linking of chitosan and Al 3+ , which exhibited a smooth thermo-response during heating and a novel recovery hysteresis during cooling. By enabling additional gentle transition in translucency, we are able to retain a comfortable indoor temperature/lightness balance during an increase in outdoor temperature, in avoidance of sudden indoor darkness at elevated temperature. By enabling additional control in the thermo-response hysteresis, this methodology provides a solution to continuously shield the dazzling afternoon sunshine until a comfortable outdoor temperature is reached. And the response degree and response temperature can be adjusted by the contents of chitosan and Al 3+ , respectively, so that the material can be customized personally. Moreover, we discovered that the hydrogel-based smart window system constructed by this methodology bears notably enhanced strength, toughness and conductivity, making it a comprehensively promising candidate for customizable smart windows.
研究领域:
材料科学
·
能源效率
·
智能材料
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2025
·
IF 8.9
Chuanbiao Zhu,Xinpeng Hu,Wenling Wang,Xiangyu Yan,Shenglong Xiao,Zhigang Liu,Xiang Lu,Jinping Qu
Phase change composites (PCCs) have become pivotal in advanced thermal energy storage (TES) systems, showing promise in addressing the intermittency of renewable energy sources. However, reconciling the tripartite challenge of achieving high enthalpy, phonon transport enhancement and flexible skeleton is still a grand challenge. Herein, a flexible boron nitride (BN)/ carbon nanotube (CNT)/ cellulose nanofiber (CNF) aerogel is prepared through synergistic non-covalent and covalent interfacial engineering, BCF aerogel achieves exceptional resilience (96% compressive strength retention after 50% compression rebound) and effectively encapsulates polyethylene glycol (90.9 wt% loading) with minimal leakage (1.5 wt% losses after 200 thermal cycles). The BCF@PEG PCCs features a unique 3D fibrous “thermal track” structure inspired by neural signal pathways, wherein the BN nanosheets are densely assembled in a face-to-face configuration along the surface of CNF bundles, CNT-COOH bridged the gaps between BN sheets. The core-sheath architecture significantly mitigates interfacial thermal resistance while achieving an unprecedented thermal conductivity enhancement efficiency of 69.9% wt −1 %, outperforming conventional blending methods by over 17-fold. Notably, the BCF@PEG-integrated thermoelectric module exhibit uninterrupted power generation under intermittent solar irradiation through adaptive phase-change regulation. This method provides a scalable paradigm for designing multifunctional BN-based PCCs toward sustainable energy infrastructure.
研究领域:
材料科学
·
储能
·
纳米技术
·
热管理
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Wang Huaiyuan,Lu Yuanwei,Wang Jie,Qi Tao,Tian Xuefeng,Yang Chaowei,Huang Yuming,Wang Meiqi,Zhang Baiqi,Qu Zhibin,Zhou Wei,Sun Fei,Gao Jihui,Zhao Guangbo
Thermochromic smart windows offer an efficient solution to reduce building energy consumption by regulating solar radiation without external energy input. However, conventional thermochromic windows often struggle to achieve high luminous transmittance (>70%), strong solar modulation, and an optimal transition temperature (30–40 °C) simultaneously. Here, we present a hydrated ionic polymer thermochromic smart window, which transitions between transparent and blue states through temperature-induced hydration and dehydration. Notably, the smart windows exhibit significant solar modulation (Δ T sol = 30.5%) and high luminous transmittance ( T lum = 87.7%), with an adjustable transition temperature range from 25 °C to 42 °C. Additionally, no significant performance degradation was observed after 200 heating-cooling cycles and 120 days under high-humidity conditions. Field tests showed that the smart windows can reduce indoor temperatures by up to 10 °C compared to clear windows. Simulations indicate a most probable energy-saving efficiency of 11.4% compared to clear windows, with further improvements up to 17.7% when combined with Low-E glass in warm climates. This work delivers a high-performance thermochromic smart window and offers a promising strategy for improving building energy efficiency and promoting global sustainability.
研究领域:
材料科学
·
建筑节能
·
高分子化学
·
智能材料
·
环境可持续性
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale Advances
·
2022
·Vol. 4
·期 19
·4169-4174
·
IF 5.598
Yi Gao,Shaofeng Liang,Shuangliang Zhao,Wei Gao,Zequan Li,Muqun Wang,Hong Li,Xiangning He,Riyao Cong,Hailin Diao,Chuwang Su,Xiaoying Xie
The emergence of cooling technology has brought about huge social benefits to society, but it is also accompanied by the serious problem of energy consumption. In countries close to the equator, intense solar radiation is accompanied by unbearable high temperatures and strong ultraviolet radiation. Therefore, we prepared a simple hydrogel with good evaporative cooling, which can work continuously and has good UV absorption, to solve the indoor cooling and UV radiation problems. Polyacrylamide (PAM) in the hydrogel provides a mechanically strong backbone, and polyethylene glycol (PEG) slows water loss and provides the hydrogel with the ability to reflect infrared light. Lithium bromide (LiBr) is a highly efficient water vapor absorbent, which can provide the hydrogel with water regeneration capability. Carbon dots (CDs) can provide excellent UV absorption for hydrogels, and CDs (4.28 kJ kg−1 K−1) have a higher specific heat capacity than water (4.20 kJ kg−1 K−1), which can store more heat for a better indoor cooling effect. The composite hydrogel has a good prospect of application in the windows of residential and high-rise buildings.
研究领域:
材料科学
·
环境科学
·
化学工程
·
能源技术
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）