Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 13
·6019-6024
·
IF 8.867
Ziya Yu,Yongji Yao,Jianing Yao,Liangmiao Zhang,Zhang Chen,Yanfeng Gao,Hongjie Luo
CsxWO3 nanoparticles were dispersed in prepolymerized methyl methacrylate (PMMA) and filled in nanopores of delignified wood to prepare transparent wood. The wood-based composite showed excellent near-infrared (NIR, ranging from 780 to 2500 nm) shielding ability and high visible light transparency. The CsxWO3/transparent wood also showed excellent mechanical properties with a fracture strength up to 59.8 MPa and modulus up to 2.72 GPa. CsxWO3/transparent wood is expected to serve as a potential material for smart-window applications.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 8
·085708
·
IF 1.449
Bian Wang,Qingjuan Wang,Yuting Zhu,Litao Kang,Jingxin Zhu,Fuyi Jiang,Wei Du,Dongjiang You,Zongtao Zhang,Feng Gao
Cesium tungsten bronze (CsxWO3) is an important functional material for energy efficient windows, showing excellent near infrared (NIR) shielding ability but no optical switching ability. In this paper, we demonstrate a photo-/thermo-dual-responsible CsxWO3/PNIPAM composite by dispersing CsxWO3 nanoparticles into PNIPAM hydrogels. Combination of the photothermic conversion ability of CsxWO3 with the thermochromic property of PNIPAM makes this hydrogel responds to both thermo- and photo-stimuli. In sunlight, the CsxWO3 component converts the absorbed infrared light into heat, triggering the phase transition of PNIPAM and switching the hydrogel into visibly opaque state (for example, transmittance decreased from 58% down to 15% at 590 nm). At the same time, an ambient temperature >32 °C can also initiate the phase transition of PNIPAM. Therefore, a photo- and/or thermo-derived transition between a 'transparent NIR-shielding' state and a 'full-solar-spectrum shielding' state is achieved, making it highly attractive for the applications as energy efficient windows for buildings in hot climate.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Nanoscale Advances
·
2021
·Vol. 3
·期 11
·3177-3183
·
IF 4.553
Yang Wang,Zhendong Yan,Mengfei Zhang,Zheng Zhang,Ting Li,Mingqing Chen,Weifu Dong
Cesium-doped tungsten bronze CsxWO3 (CWO) is an ideal near infrared (NIR) shielding material for solar filters. However, the NIR shielding ability of CWO-dispersed films easily deteriorates in hot humid environments, which severely hinders the commercial application of CWO. In this paper, UV/NIR shielding nanocomposite films were prepared by dispersing core–shell structured CWO@polydopamine (CWO@PDA) in a poly(vinyl alcohol) matrix. Because of the strong ultraviolet light absorption ability of PDA, it can shield ultraviolet light, which is generally detrimental to our health. The prepared nanocomposite films can efficiently shield 88.3% UV and 85.5% NIR radiation even though they show relatively high transparency in the visible range. Importantly, the good protection of the continuous PDA shells played an important role in enhancing the stability of CWO nanoparticles. The nanocomposite films also exhibit excellent stability in hot humid environments. Therefore, core–shell structured CWO@PDA nanoparticles have great potential as a novel UV/NIR shielding material for the development of efficient energy-saving windows.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Solar RRL
·
2021
·Vol. 5
·期 5
·2100036
·
IF 8.582
Jun-Yan Li,Hong-Yan Chen,Yong Jiang,Dai-Bin Kuang
To make full use of solar energy and achieve effective separation of photogenerated carriers, semiconductor heterojunction engineering is becoming increasingly significant nowadays. Herein, Cs x WO 3 /CsPbBr 3 heterojunctions via cosharing the Cs atom are synthesized by a facile acid solution method, which involves the in situ growth of CsPbBr 3 nanoparticles on the surface of Cs x WO 3 nanorods. Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) tests confirm that a high-quality interface with strong interaction between Cs x WO 3 and CsPbBr 3 is constructed successfully. Thus, a direct Z-scheme charge transfer pathway is built in such close-contact heterojunctions, which can not only effectively prevent the recombination of photogenerated carriers, but also preserve the carriers with higher redox abilities, as confirmed by electron spin resonance (ESR) as well as Kelvin probe force microscopy (KPFM). As a proof of concept, the photocatalytic hydrogen production performance of Cs x WO 3 /CsPbBr 3 is evaluated in ethyl acetate, and a 17-fold enhancement in hydrogen production rate as compared with pristine Cs x WO 3 is obtained, verifying the effective charge separation in such heterojunctions. Herein, a new idea for in situ synthesis of high-quality perovskite-based heterojunctions is provided, which will broaden their optoelectrical applications.
研究领域:
材料科学
·
光催化
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Anye Shi,Huihui Li,Shu Yin,Zaili Hou,Jiayue Rong,Jiachi Zhang,Yuhua Wang
Cs x WO 3 nanorods can be used to sensitize the single layer g-C 3 N 4 , where full spectrum light harvesting excited electrons to drive the photocatalytic reduction of N 2 into NH 3 . Under UV light, both water splitting and solar ammonia synthesis reaction exhibit high activity. However, selectivity towards ammonia over hydrogen is realized under NIR irradiation. With the control of methanol, O 2 can directly decide the NH 3 or H 2 evolution on photocatalyst. The origin is the strong capture of O 2 with the electrons from the photocatalyst under light irradiation to yield the oxygen active species, which transfer electrons subsequently with help of methanol to generate NH 3 . However, H 2 production will be suppressed by O 2 . And with its sacrifice, methanol preserves the produced NH 3 from oxidation. The O 2 -sacrificial agent mediated NH 3 evolution reaction found here provides insights in the promotion role of them in other catalysis.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Junyan Liu,Jingxiao Liu,Fei Shi,Jiaxiang Wan,Chuangchuang Ma,Huijun Sun,Guohao Cui,Xin Ding
Constructing a solar-powered photothermal system that can self-regulate temperature without requiring extra energy input is significant for energy saving, but how to achieve zero-energy building remains challenging. Here, a photothermal system that integrates sunlight harvesting, photothermal conversion (PTC), and heat storage was constructed. Well-developed nanoscale pore silica aerogels with high transparency (visible-light transmittance 69.3%, near-infrared transmittance 86.9%), bending resistance (bending angle >30°), and low thermal conductivity were prepared by the interpenetration of C and Si molecular networks using vinyltrimethoxysilane as the silica source, which was used as a window material for the temperature self-regulating system to block heat loss and allow sunlight transmission. Simultaneously, the prepared CsxWO3 (CWO) film with PTC could convert sunlight into heat. Also, PEG 2000 is introduced into the system with a suitable phase transition temperature to further realize temperature self-regulation within a certain range. The outdoor simulation test results showed that the system could heat water to 69.8 °C using sunlight in cold weather around 0 °C, which was 67.6 °C higher than the ambient temperature and can stay above 18 °C for about 20 h, and even in cloudy weather, it could reach 58.2 °C. The highly transparent silica aerogel is given the ability to resist bending, which opens up more application prospects for silica aerogels, and the constructed self-regulating temperature system without additional energy input contributes to the development of the zero-energy building.
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Qianyi Li,Yuxuan Zheng,Jingyao Zhang,Zhiyong Xiong,Haibo Jin,Yuefeng Su,Caihong Feng,Ning Li,Chengzhi Wang,Jingbo Li
Cesium tungsten bronze (Cs x WO 3 ) is of significant interest due to its unique spectral selectivity, which is utilized in transparent thermal insulation coatings. However, the low-cost batch preparation of Cs x WO 3 nanopowders remains a challenge. In this study, we performed an Sb doping modification of Cs x WO 3 . It was observed that Sb doping makes Cs x WO 3 more prone to breakage, facilitating the preparation of nanoparticle Cs x WO 3 through a simple solid-state reaction followed by mechanical milling. A 7 % Sb doping results in a small average particle size of 108 nm using moderate ball milling. Meanwhile, appropriate Sb doping enhances the transparent thermal insulation properties of Cs x WO 3 . A 3 % Sb doping raises the integrated visible light transmittance ( T lum , 380–780 nm) of Cs x WO 3 from 61.7 % to 65.40 %, and improves the near-infrared shielding efficiency ( Ψ NIR , 780–2500 nm) from 61.20 % to 65.92 %, increasing by approximately 4 % and 5 %, respectively. The reasons for these property improvements are discussed based on experiments concerning bandgap ( E g ) and oxygen vacancy concentrations induced by Sb doping. This study indicates that Sb doping of 1–3 at% can produce Cs x WO 3 nanopowders with better performance in a low-cost method, which is of great significance for advancing the production and practical application of nano-sized tungsten bronze powder in energy-saving coatings.
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 21
·5196
·
IF 3.1
Yunpeng Liu,Yuqi Mu,Xihao Yang,Zhiyu Yao,Shaofeng Peng,Jincheng Shi,Wendi Tian,Yen Wei,Kangmin Niu
This study is dedicated to the development of a new type of cesium tungsten bronze energy-saving laminated glass and explores its application in insulating glass combinations, offering innovative ideas and practical solutions for advancing energy-saving glass technology. Experimental results show that both CsxWO3(CWO) dispersions exhibit good visible light transmittance and near-infrared shielding properties, with CWO1 demonstrating superior shielding in the 650–950 nm range, attributed to differences in shape and size distribution and verified by simulations using the Drude–Lorentz model and the finite element method.
研究领域:
材料科学
·
光学工程
·
建筑节能
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Ping Yu,Zemin He,Yuzhen Zhao,Wenqi Song,Zongcheng Miao
The problem of energy consumption in buildings is getting more and more attention. As a result, developing a smart window with electrically adjustable visible light transmittance while also providing near-infrared (NIR) shielding is extremely important. Herein, A smart window was developed that simultaneously regulates visible light transmittance and provides NIR shielding by co-doping polymer dispersed liquid crystal (PDLC) with cesium tungstate modified with thiol groups (CsxWO 3 -SH) and thermochromic microcapsule (TM). The PDLC with the synergistic effect of CsxWO 3 -SH and TM has lower saturation voltage (V sat ) and better contrast than the PDLC doped with CsxWO 3 -SH and TM alone. In addition, the transmittance of the PDLC samples containing 4 wt % CsxWO 3 -SH nanoparticles and 7 wt % TM under visible light can be controlled between 3 % and 48 %, and can obstruct over 90 % of the NIR radiation. The results of thermal insulation suggest that the temperature of the conventional PDLC is 5.56 °C higher than that of the co-doped PDLC after 60 min of sunlight exposure, demonstrating that the co-doped PDLC film possesses superior visible light modulation and NIR shielding capabilities. This research will establish a solid foundation for the advancement of energy-efficient smart windows for buildings.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2015
·Vol. 3
·期 31
·8050-8060
·
IF 4.696
Xianzhe Zeng,Yijie Zhou,Shidong Ji,Hongjie Luo,Heliang Yao,Xiao Huang,Ping Jin
Cesium-doped tungsten bronze CsxWO3 is an ideal near infrared (NIR) shielding material for solar filters. However, the CsxWO3 nanoparticle dispersed resin film exhibits obvious photochromic behavior under ultraviolet (UV) illumination, which severely hinders the commercial application of CsxWO3. In this paper, CsxWO3/SiO2 composite resin coatings were successfully prepared with excellent NIR shielding ability and outstanding optical stability under strong UV illumination by combining an ultraviolet-absorbing agent (UVA) with SiO2. The roles of UVA and SiO2 in preventing the photochromic behavior of the CsxWO3/SiO2 composite resin coating were vital, reducing the photochromic reaction rate by UVA and limiting the photochromic reaction areas by SiO2. In sum, our research provides a new solution for eliminating the photochromism of a CsxWO3-based resin film and it may have practical application in architecture and automobiles.
研究领域:
材料科学
·
光学涂层
·
纳米材料
·
太阳能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Dayi Yang,Jingxiao Liu,Fei Shi,Yi Li,Jiaxiang Wan,Xinyu Yuan,Ziwei Tian,Meiyu Wang,Chuangchuang Ma
Synthesis of cesium tungsten bronze (Cs x WO 3 ) nanorods with excellent near-infrared shielding performance by a one-step solvothermal method from cheap tungsten source is still challenging. In this work, small-sized Cs x WO 3 nanorods with excellent transparent thermal insulation performance were synthesized by a one-step solvothermal method. It was found that halogen acids played an important role in regulating the growth and microstructure of Cs x WO 3 nanorods. Moreover, different halogen acid can regulate the content of W 5+ =O and oxygen vacancies (V O ) in Cs x WO 3 nanorods, which is helpful to further improve the near-infrared shielding performance of Cs x WO 3 particles. Compared with HF and HBr, the Cs x WO 3 nanoparticles synthesized under the regulation of HCl contain more V O s and W 5+ =O content, showing more excellent near-infrared shielding performance, and the as-prepared Cs x WO 3 -PVA composite film exhibits low haze and high transparency, with the near-infrared light shielding rate at 1500 nm attaining to 97.7% when the visible light transmittance is 71.8%. The thermal insulation test results show that the Cs x WO 3 -PVA composite film synthesized under the regulation of HCl can effectively reduce the indoor temperature by 6.9 °C under the irradiation of sunlight. After 100 cycles of thermal insulation tests, the near-infrared shielding and thermal insulation performance have not declined, showing excellent photothermal stability. This work is of great significance for promoting the industrial production of high-performance Cs x WO 3 nanoparticles and its application in energy-saving 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
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Ning Li,Xueyun Gao,Haikuan Fan,Yangqin Gao,Lei Ge
Effective and suitable utilization of solar energy was achieved using a full-spectrum-response photocatalyst AgBr/Cs x WO 3 , applied in the photocatalytic and photochromic field. Benefitting from near-infrared (NIR) absorption ability of Cs x WO 3 , AgBr/Cs x WO 3 exhibits enhanced visible-near-infrared (Vis-NIR) driven photocatalytic activity. Based on X-ray photoelectron spectroscopy (XPS), photoluminescence spectra (PL), and the photoelectrochemical analysis, AgBr and Cs x WO 3 formed a Z-scheme system at the interface to efficiently separate and transfer photo-induced electrons at a fast rate. The quenching experiment and the electron spin resonance (ESR) tests indicated that the photocatalytic reaction is activated by the production of superoxide radicals. Furthermore, the photochromic analysis to different light exhibits the AgBr/Cs x WO 3 heterostructure is stable under visible light with negligible photodeposition of AgBr, and has excellent double photochromic activity with visible-shielding effect of AgBr to Ag 0 and infrared-blocking effect of Cs x WO 3 under ultraviolet light. This research provides new insights into the manufacture of energy-efficient and environmentally friendly materials that provide excellent performance in both thermal insulation and decontamination.
研究领域:
材料科学
·
物理化学
·
纳米催化
·
光化学
·
功能材料
·
环境净化
·
能源材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）