CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Tingfeng Ma,Bin Li,Shouqin Tian,Jiachen Qian,Longxiao Zhou,Qiufen Liu,Baoshun Liu,Xiujian Zhao,Gopinathan Sankar
W 18 O 49 has widely used in photothermal application and photocatalyst due to its strong Localized Surface Plasmon Resonance (LSPR) effect and unique oxygen-deficient structure. In addition, the unstable structure and easily changed valence state of W 5+ make W 18 O 49 potentially photochromic. However, the generally synthesized blue W 18 O 49 particles was in a saturated colored state, delivering a great challenge in exploring its photochromic features, which thus have seldom been studied. Herein, we found that the bleached W 18 O 49 obtained by mild-heating the solvothermal-synthesized blue W 18 O 49 nanoparticles in air had considerable reversible photochromic feature, which can be colored in 1 min under UV irradiation. The photochromic mechanism of W 18 O 49 was revealed through the XRD, XPS and FTIR results. The chromic process was mainly attributed to the changed W 5+ content under different conditions. The photochromic performance was systematically investigated on the W 18 O 49 -based film and which can be significantly improved by Ti doping. Finally, the great potential of the films in the energy-saving smart windows application has verified, and a 10 at.% Ti-doped W 18 O 49 film delivered outstanding optical performance with luminous transmittance ( T lum ) of 87.53% and solar energy modulation efficiency (Δ T sol ) of 30.13%.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Xuan Yang,Zesen Yu,Hedong Jiang,Huanhuan Guo,Jian Sun,Jiake Li,Hua Zhu,Yanxiang Wang,Pingchun Guo
Metal–organic frameworks (MOFs) are promising candidates for thermochromic materials. In this study, a hydrogen-bonded 3D porous metal–organic framework, Co-BTC (Co3(BTC)2·12H2O, BTC = 1,3,5-benzenetricarboxylate), exhibited a pink color at room temperature, attributed to the d–d transition of Co2+ ions within the framework, and displayed reversible thermochromic behavior due to alterations in the coordination environment of Co2+ ions. Additionally, Co-BTC/PVB thermochromic film was successfully designed and fabricated as a smart window with a monolayer structure. The window exhibited reversible thermochromic behavior comparable to Co-BTC, with visible transmittance modulation of 10.73%, near-infrared transmittance modulation of 25.87%, and solar transmittance modulation of 12.63%. Compared to a pure PVB window, the smart window reduced indoor temperatures by 5.7 °C in field tests, indicating a significant energy-saving effect. This research presents a potential application for the rational design of MOFs in the development of advanced smart windows.
研究领域:
材料科学
·
能源工程
·
建筑技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
·
2025
·
IF 3.4
Jiayi Tian,Peng Liu,Yahao Zhao,Wei Zheng,Gen Li,Changchun Han,Wen Liu,Qing Li,Zhijie Den,Xinguo Ma,Furong Ye,Yizhong Huang
Vanadium dioxide (VO2) is a promising material for smart windows due to its metal–insulator transition that enables dynamic solar transmittance modulation. In this study, VO2 (M) nanoparticles were synthesized using a novel approach involving the self-supported structure of V4C3 MXene derived from V4AlC3. Through selective etching, solvothermal oxidation and annealing, VO2 (M) nanoparticles with enhanced thermochromic properties were produced. The self-supported structure of V4C3 MXene significantly reduced particle agglomeration and improved crystallinity, resulting in VO2 (M) films with a luminous transmittance (Tlum) of up to 58.3% and a solar modulation ability (ΔTsol) of 6.3%. The study also demonstrated that film thickness and hydrogen peroxide concentration critically influence optical and thermochromic performance. This study provides a new approach for the preparation of MXene-based VO2 thermochromic smart window materials and is expected to promote their application in the field of building energy conservation.
研究领域:
材料科学
·
能源与建筑节能
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2024
·
IF 24.4
Junyao Chen,Sheng Cao,Yuwei Liu,Shihua Qin,Huiying Li,Tao Yang,Jialong Zhao,Bingsuo Zou
Electrochromic windows can control the amount of sunlight entering buildings, thus enabling thermal regulation and offering a significant opportunity to reduce building energy consumption. However, current electrochromic windows encounter difficulties with multi-color control and fully independent adjustment of visible light and near-infrared heat. Herein, this work introduces an advanced multi-color four-mode dual-band electrochromic smart window (DESW) that not only showcases various color transformations but also independently manages visible light and near-infrared heat from solar radiation, providing year-round thermal regulation for buildings. This device features a zinc anode with Prussian blue analogues and tungsten oxide film electrodes. Its optical state superposition effect allows for a range of color transformations (yellow, orange, green, and black), enhancing visual appeal and offering four distinct optical states for precise control of visible light and near-infrared transmittance. Simulation results show that this device achieves greater energy efficiency than commercial glass in most global climates throughout the year. Moreover, the energy generated by this multi-color four-mode DESW can be used to power low-energy devices within the building, further decreasing overall energy consumption. This research opens up extensive possibilities for smart window design and supports the development of green buildings, contributing to global carbon neutrality and sustainable development.
研究领域:
建筑材料
·
能源技术
·
光学材料
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2024
·Vol. 31
·期 14
·8681-8693
·
IF 4.9
Yi Zhaodi,Song Zengbin,Wang Jian,He Ming
Hydrogel smart windows with light modulation capability have received widespread attention because they can meet the requirements of indoor lighting at daytime, privacy protection at night and energy saving. However, it remains challenging to achieve these multiple goals simultaneously and enable active actuation to meet the temporary needs of users. In this study, a thermal and solvent responsive hydrogel smart window was developed by introducing hydroxypropyl cellulose (HPC) and sodium dodecyl sulfate (SDS) micelles into a polyacrylamide (PAAm) cross-linked network. By adding different concentrations of NaCl solution, the hydrogels underwent upper critical solution temperature (UCST)- and lower critical solution temperature (LCST)-type phase transitions in the ranges of 1 − 15 °C and 25 − 80 °C, respectively, which enabled the hydrogel to achieve a reversible transition between opacity and transparency with temperature change. The smart window exhibited an excellent solar modulation ability (T lum = 91.39%, ΔT sol , 15−5℃ = 68.67%, ΔT sol , 15−40℃ = 62.50%) and effective IR shielding. Furthermore, actively actuated light modulation of hydrogel smart windows was achieved by spraying ethanol on the hydrogel surface. Ethanol stimulation and volatilization induced the reconfiguration and dissociation of hydrogen bonds between HPC and PAAm molecular chains, resulting in reversible transparency transitions. We anticipate that this facile strategy for preparing thermal and solvent responsive hydrogels could serve as a promising alternative for designing phase change hydrogels for a variety of applications. Graphical Abstract
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Kaiqiang Zhang,Yulin Shi,Liang Wu,Long Chen,Tingting Wei,Xin Jia,Zhang Chen,Manqiu Li,Yisheng Xu,Yu Wang,Yanfeng Gao,Xuhong Guo
A thermo and pH dual-responsive starch (TPDS) was successfully synthesized by etherification, in which butyl glycidyl ether (BGE) was used as the hydrophobic reagent followed by addition of 2-chloro-4, 6-diglycino-[1,3,5]-triazine (CDT) groups. The obtained materials were characterized by Fourier transform–infrared spectroscopy (FTIR), 1 H nuclear magnetic resonance ( 1 H NMR) and elemental analysis to confirm the structure and the average substitution degree of BGE and CDT on starch molecule. It was observed that the lower critical solution temperature (LCST) of the TPDS could be modulated from 31 °C to 47 °C by increasing pH of the solution. The effects of pH and the concentration of such materials on the energy-saving performance of TPDS which could be potentially used as smart windows were investigated by UV-vis-NIR spectrophotometry. The solar modulating ability (△T sol ) and the luminous transmittance (△T lum ) of the sample were 40.1% and 47.1% when 10 g/L TPDS was chosen at pH 3. The results indicate that TPDS exhibits excellent optical performance with a controllable LCST, which shows great potential for the application as a smart window.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2020
·Vol. 8
·期 1
·2001606
·
IF 4.948
Zuohao Wen,Yujie Ke,Chengchen Feng,Shuliang Fang,Miuyang Sun,Xinghai Liu,Yi Long
The VO 2 -based smart windows can dynamically and reversibly adjust the indoor solar irradiation to reduce the energy consumption for building glasses. This paper reports the first successful preparation of Mg-doped VO 2 @ZrO 2 core−shell nanocrystals with promoted thermochromic performance as well as tunable appearance and wettability. The achieved combination of T lum of 52.4% and ∆ T sol of 7.1% is comparable to the best-reported results of VO 2 -based core−shell rod structures. The thickness of ZrO 2 shell is tunable between 3 and 14 nm, resulting in a slightly hydrophobic surface and a slight color change toward blue-green and brighter produced films. The preparation method based on hydrothermal and UV-curing methods is facile. This work may inspire future development of VO 2 synthesis, their structure−property, and the application the thermochromic films for energy-saving purposes in buildings or automobiles.
研究领域:
材料科学
·
能源技术
·
纳米技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Yining Ma,Huaijuan Zhou,Jingting Zhu,Shidong Ji,Shanhu Bao,Rong Li,Ping Jin
Flake-like VO 2 (M) has been successfully synthesized by annealing plate-like (NH 4 ) 0.6 V 2 O 5 in vacuum and its thermochromicity was investigated. Preparation conditions such as temperature and vacuum degree have been varied to obtain the pure phase. The formation mechanism from ammonium vanadium bronze to VO 2 (M) has been explored. The flake-like VO 2 (M) shows an excellent thermochromicity; the infrared modulation at 2500 nm was up to 56.6% with a 30% visible transmittance which will be beneficial for smart windows, smart curtains or other applications.
研究领域:
材料科学
·
热致变色材料
·
纳米材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yunfei Xie,Yingchao Zhang,Meini Li,Ruonan Huang,Xincai Liu,Danming Chao
Electrochromic capacitive windows (ECW) combining energy storage and electrochromism have attracted considerable interest because of their unique energy-saving and energy-recovery features. Therefore, it is highly desirable to explore an electrode material with excellent electrochromic and energy storage properties simultaneously. Herein, we synthesize an electroactive polyamide containing pentaaniline segments (EPA) in the main chain via oxidative coupling polymerization, which showcases electrochemical optical modulation and high capacitance synchronously. Attributed to non-acidic electrolyte and rational matching with V 2 O 5 ion-storage material, the as-fabricated ECW exhibits good dual-band optical modulation performance with high optical contrast of 56.57% at 650 nm (Visible region) and 53.29% at 1250 nm (NIR region), fast optical switching response (<5 s), as well as effective regulation of indoor temperature. The resultant ECW also possesses practical energy storage properties, along with a wide voltage window of 2 V, a large capacitance of 47.26 mF/cm 2 , and outstanding electrochemical cycling durability. In its coloring state, the energy stored in ECW could be utilized to drive small-scale electronic equipment, indicating its energy recovery and reuse feature. In conclusion, the ECW in this work functions as a color-switching smart window and a rechargeable supercapacitor, which exhibits great promise for development in green buildings.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Science China-Technological Sciences
·
2024
·Vol. 67
·期 12
·3801-3811
·
IF 4.4
Bai YiJie,Tang TianQi,He YuRong
Smart windows, capable of dynamically regulating indoor heat, offer a promising avenue for effectively reducing energy consumption. Hydrogel-based smart windows are excellent at thermal modulation and daylighting, but they are difficult to commercialize globally due to problems like winter ice formation, which can affect thermal insulation, daylighting, and structural integrity, as well as an impractical cloud point temperature ( t cp ). To solve these issues, a ternary anti-freezing system consisting of ethylene glycol (EG), glycerol, and water is proposed. With the t cp regulated at 31.6°C, the system strikes a balance between outstanding daylighting (91.89%) and solar modulation ability (78.32%). Furthermore, the system shows resilience even below −30.0°C and long-term stability, which qualifies it for use in densely populated regions even with severely cold weather. To further illustrate the distinct impacts of EG and glycerol, the optical characteristics and t cp of binary systems containing EG and water as well as glycerol and water were examined. The durability test includes severely cold temperature of −30.0°C and solar exposure temperature of 60.0°C. This work would offer insights to advance the field’s understanding of anti-freezing capability modification in smart windows and advance the development of environmentally and energy-efficiently designed buildings.
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
ADVANCED ENGINEERING MATERIALS
·
2024
·Vol. 26
·期 14
·2302224
·
IF 3.4
Mtawa Alsaadi,Kittitat Lerttraikul,Sojiphong Chatraphorn,Salinporn Kittiwatanakul
Due to the growing need for smart windows for buildings to reduce energy usage, vanadium dioxide (VO 2 ) has been investigated as a potential material for thermochromic smart windows due to its ease of implementation and simplicity in industrial production. VO 2 undergoes a reversible phase shift from a monoclinic (M, P21/c) semiconductor to a rutile (R, P42/mnm) metal at a critical temperature of 68 °C. This transition is accompanied by acute variations in IR reflectance, transmittance, and electrical resistance. Despite substantial developments in thermochromic materials, their optical and transition properties are still unsatisfactory. In the past several decades, many methods for enhancing optical properties have been reported, including composite films, multilayer structures, and element doping. Recent developments in thermochromic smart windows to improve both optical properties and durability have been surveyed in this review. Additionally, future growth trends have been provided by the possibility of commercially manufacturing VO 2 smart windows.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2022
·
IF 7.188
Qiaoqi Yu,Min Guo,Wanxuan Xu,Xiaodi Shi,Ying Ma,Jianyong Yu,Bin Ding
Smart windows for adaptive solar modulation have attracted considerable attention because of their broad prospects in energy-saving buildings. Herein, energy-saving smart windows are fabricated by the high-efficiency spray assembly of thermoplasmonic gold nanoparticles (Au NPs). First, the adsorption kinetics of the Au NPs in the spray assembly are investigated based on a pseudo-first-order kinetics equation, which exhibit a spray-pressure dependency. The amount of adsorbed Au NPs after spraying at 30 psi for 20 s is up to ∼80% the saturation adsorption amount, demonstrating the high-speed characteristic of the spray assembly. The spray-assembled Au NP coating, as a solar heating surface, is used to construct smart windows for adaptive solar modulation with the thermochromic poly(N-isopropylacrylamide) hydrogel. The obtained smart window shields 76.6% of the total solar irradiation in the range 300–2500 nm and allows 80.3% of the visible light to enter indoors before optical switching by the hydrogel ensures visual comfort. The cooling performance of the smart window is determined to be ∼13.9 °C by a model house test under a stimulated solar irradiation of 2.8 kW·m −2 (2.8 suns). Moreover, the fabrication method is suitable for flexible substrates to prepare bendable smart windows. This work provides a speed-up fabrication strategy for the large-scale manufacturing of energy-saving smart windows.
研究领域:
材料科学
·
能源工程
·
纳米技术
✓ 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）