CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Yongji Yao,Liangmiao Zhang,Zhang Chen,Chuanxiang Cao,Yanfeng Gao,Hongjie Luo
A simple two-step route is developed to fabricate hexagonal Cs x WO 3 nanoparticles . The core of this route is the preparation of the precursor by drying the mixture of WO 3 sol and CsCl , which leads to a higher Cs/W (0.32) ratio at low temperature in a short time. During reaction, oleic acid, used as a solvent, can be adsorbed on the surface of Cs x WO 3 nanoparticles, which results in small particle size (20 nm × 10 nm) and mild agglomeration. In addition, oleic acid also plays a role as a reducing agent in forming Cs x WO 3 nanoparticles without any further post-treatment. Furthermore, the film prepared from as-synthesized Cs 0.32 WO 3 nanoparticles shows excellent NIR-shielding properties (approximately 99% of the near-infrared radiation is cut off over a wavelength range of 780–2600 nm and the visible-light transmittance at 465 nm is 78.9%) when covering on an ordinary sheet of glass. A model which simulates the real environment is applied to evaluate heat-shielding performance of the Cs 0.32 WO 3 film while comparing with that of ordinary glass and commercial ITO glass (10 Ω □ −1 ). Results revealed that the Cs 0.32 WO 3 film showed superior performance than others.
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
·
2021
·Vol. 8
·期 2
·025004
·
IF 1.62
Mengyuan Li,Zhiyang Zhao,Xianli Fang,Zefeng Zhang,Min Deng
CsxWO3-ZnO-SiO2 smart coatings were proposed to achieve multiple functions, such as thermal insulation, anti-dust, anti-fogging and blocking harmful ultraviolet light, etc. The transparent hydrophobic hybrid resins were prepared from methyltriethoxysilane (MTES) and SiO2 sol, which was used as the substrate of the composite coating. The CsxWO3 is served as the near-infrared (NIR) absorber, and the ZnO is functioned as the ultraviolet (UV) blocking agent. Coatings with different ratios of CsxWO3 and ZnO were successfully prepared by co-blending with nano-SiO2 resin. The morphology, microstructure, surface composition, hydrophobicity, thermal stability, anti-dust and optical property of the composite coatings were investigated comprehensively. The transmittance of C10Z10 (CsxWO3 10%, ZnO 10%, nano-SiO2 resin 80%) coating at 370 nm is 2.3%, and the value of Solar Energy Transmittance Selectivity (SETS) is 0.665, which exhibits excellent NIR shielding ability. Compared with nano-SiO2 resin coating, the thermal insulation temperature difference can reach 7.0 °C. The C10Z10 coating showed good durability in the twenty times anti-dust repeated tests and the efficiency could maintain 70.3% after the repeating tests. The coating showed excellent sustainability after a 45-day outdoor exposure experiment and a 240 h of artificial accelerated aging experiment. Thus, the proposed CsxWO3-ZnO-SiO2 coatings are promising for outdoor smart windows.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Yunxiang Chen,Xianzhe Zeng,Yijie Zhou,Rong Li,Heliang Yao,Xun Cao,Ping Jin
Cesium-doped tungsten bronze Cs x WO 3 (CWO) is a promising candidate for near-infrared (NIR) shielding materials on windows of buildings and automobiles. However, the NIR shielding ability of CWO easily deteriorates in hot humid and alkaline environments, which hinders further applications of CWO. In this paper, we firstly reported a novel core-shell structure of CWO@ZnO, which exhibited high NIR shielding performance with excellent stability. In hot humid environment, CWO@ZnO nanoparticles kept their outstanding NIR shielding ability after 150 days while uncoated CWO nanoparticles showed an evident deterioration in just 1 day. Moreover, the CWO@ZnO core-shell structure also exhibits excellent stability in alkaline environment. The good protection of the uniform, continuous and compact ZnO shells played an important role on enhancing the stabilities of CWO nanoparticles. This study provides a novel route for promoting the practical applications of CWO NIR shielding materials.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Qianyi Li,Shanshan Deng,Donglai Li,Junlin Yang,Haibo Jin,Jingbo Li
Cesium tungsten bronze (Cs x WO 3 ), a unique energy-saving material, has attracted great interest because of its excellent visible transmittance and near-infrared absorption. In order to improve its optical properties , the Ti doping modification was carried out in this work, and a series of Ti-doped Cs X WO 3 (Ti-Cs x WO 3 ) nanopowders were synthesized by a solvothermal reaction and post-annealing. The 1.71 at. % of Ti dopants achieved remarkable enhancement of both integral visible transmittance ( T lum , 380–780 nm) and near-infrared shielding efficiency ( Ψ NIR , 780–2500 nm) of Cs x WO 3 . The T lum and Ψ NIR of the 1.71 at. % Ti-Cs x WO 3 polymer film reaches 63.87 % and 76.90 %, respectively, higher by 51.88 % and 65.00 % than those of the Cs x WO 3 film. The improvement of T lum is attributed to the broadening of band gap and smaller size of the nanoparticles induced by Ti doping, and the enhanced Ψ NIR would result from the increased free electron concentration and energy levels of impurities. The incorporation of Ti elements renders Cs x WO 3 a promising application in the field of energy saving.
研究领域:
材料科学
·
纳米技术
·
光学材料
·
能源效率
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Wei Guo,Zheng Zhang,Nian Li,Min Xi,Cui Liu,Shudong Zhang,Zhenyang Wang
Transparent materials accompanying ultraviolet and near-infrared (UV/NIR) shielding play a crucial role in sunlight management and are desirable for reducing energy consumption in buildings. Herein, a hollow flower-like core–shell hybrid, in which hollow TiO2 spherical cores are bonded with a CsxWO3 hierarchical nanosheet shell (h-TiO2@CsxWO3 hybrid), is prepared for high-efficiency absorption of UV/NIR light and corresponding transparent membrane-based UV/NIR light shielding for thermal management. Impressively, while maintaining high visible light transmission, the h-TiO2@CsxWO3 flower-like hybrids display the almost complete absorption of UV and NIR light caused by the multilevel synergistic scattering and absorption of incident light between the components. Next, to expand the application of building energy conservation engineering, the h-TiO2@CsxWO3 flower-like hybrids are spray-coated onto the surface of a PET film to serve as the membrane material, showing nearly 80% visible light transmission and complete shielding from UV and NIR light. As a proof of concept, based on the UV/NIR light absorbing shield strategy for thermal management, by transferring the as-prepared h-TiO2@CsxWO3/PET functional membrane as “window glass” on a home-made house model, a temperature reduction of ∼16.4 °C could be achieved relative to a blank house under 1 sun irradiation. Further, outdoor testing (Hefei, China) with simulated room temperatures below ∼25 °C throughout a full day's test cycle achieved a sub-ambient cooling temperature of ∼11.5 °C. Thus, both the solar radiation shielding capability and the combined outdoor service performance significantly advance the UV/NIR shielding strategy for real-world solar/thermal-management applications.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Jingxiao Liu,Zhichun Zou,Fei Shi,Xin Song,Haoyuan Zhang,Han Zhang,Xiaoying Song,Xinran Zhao,Zixuan Wang,Jiahong Kang
In order to further improve the luminescence of NaYF 4 :Yb,Er, we successfully constructed pitaya-like Cs 0 · 3 WO 3 @NaYF 4 :Yb, Er particles, in which Cs 0 · 3 WO 3 particles were encapsulated in NaYF 4 :Yb, Er particles. This structure enhanced the intensity of 407, 527, 542 and 657 nm emission peaks by 10.1, 5.9, 5.5 and 1.8 times, respectively. Through calculated, the Commission Internationale de l’Eclairage (CIE) chromaticity coordinates changed from (0.28, 0.71) to (0.25, 0.73), indicating that the emission colour was tuned from yellow to green. The construction mechanism of this structure and the mechanism of upconversion (UC) luminescence enhancement were discussed. By studying the different luminescence mechanisms of NaYF 4 :Yb, Er excited by 1550 and 980 nm laser, we found that the UC luminescence enhancement and colour tuning of NaYF 4 :Yb, Er were due to the localized surface plasmon resonance (LSPR) effect of Cs 0 · 3 WO 3 , which can absorb more excited photons and transfer them to the Er 3+ ion 4 I 11/2 level. Given that the transition process of green light emission is easier than red light emission, the redundant photons are more inclined to achieve emitting green light and show UC luminescence enhancement and emission colour tuning. Overall, the as-prepared novel pitaya-like Cs 0 · 3 WO 3 @NaYF 4 :Yb, Er particles exhibit strong UC luminescence enhancement and colour tuning, thus having great application prospect in the field of luminescent displays.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 25
·6251-6258
·
IF 5.256
Yijie Zhou,Ning Li,Yunchuan Xin,Xun Cao,Shidong Ji,Ping Jin
Well-dispersed cesium-doped WO3 (CWO) nanocrystals are an attractive candidate as hosts that exhibit excellent near infrared-shielding ability owing to two kinds of absorptions: localized surface plasmon resonance absorption around 900 nm and small polaron absorption near 1800 nm. In this work, a simple thermal reduction method was introduced to synthesize a CWO powder, which was further dispersed by bead milling to obtain a CWO nanodispersion liquid. The CWO nanodispersion liquid can be employed to make a unique nonlinear optical foil with 70% visible transmittance and a near infrared transmittance less than 10%, while maintaining a high transparency with less than 1.0% haze. However, the main issue concerning CWO nanoparticle-based polymer foils is the detrimental photochromic effect under strong ultraviolet (UV) irradiation, which hampers their extensive application in energy-saving windows, such as in automobiles and architecture. Herein, the photochromic effect is largely relieved by embedding CWO nanoparticles into inert polyethylene terephthalate (PET) instead of mixing with resins like polyurethane or acrylic resin, and the final organic–inorganic nonlinear optical foils exhibit almost no coloration under strong UV illumination. Therefore, this study provides a new insight into making hybrid foils with high stability, transparency and multifunctionality in the optical and magnetic fields.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
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
Smart windows with controllable visible transmittance and high near-infrared (NIR) shielding properties have heightened demands for applications in buildings. Herein, we present a hybrid composite film that can control the visible transmittance and shield NIR light via incorporating Cs x WO 3 /SiO 2 -SH nanoparticles into normal polymer-dispersed liquid crystals (PDLCs) film. The surface-modified SiO 2 -SH helps not only to prevent the aggregation of Cs x WO 3 nanoparticles in polar solvent, but also to maintain the well-dispersibility of Cs x WO 3 /SiO 2 -SH nanoparticles in the prepared film. The results indicated that the samples doped with Cs x WO 3 /SiO 2 -SH nanoparticles exhibited more dramatic electro-optical performance regulation effect than the samples doped with Cs x WO 3 nanoparticles due to the synergistic effect of the enlarged void and the woken anchoring forces. The optical transmittance suggested that the sample containing 7 wt% Cs x WO 3 /SiO 2 -SH nanoparticles can control the transmittance between 0.5 % and 71.2 % in the visible light, and shield more than 75 % NIR radiation. In the outdoor experiment, the temperature difference between two model houses consistently around 7 °C after 2 min exposure to the sun under the experimental conditions, suggesting the outstanding thermal management ability of the as-made film. The work could open new doors for the development of energy-saving smart windows in architecture and vehicle glass.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2019
·
IF 6.019
Ning Xie,Junyi Niu,Tong Wu,Xuenong Gao,Yutang Fang,Zhengguo Zhang
Phase change materials (PCMs) with excellent energy conservation performance have been extensively utilized in solar energy storage system . In this study, a novel kind of thermal storage composite material based on calcium chloride hexahydrate (CaCl 2 ·6H 2 O) salt hydrate as core PCM and cesium tungsten bronze (Cs x WO 3 ) nanoparticles as near-infrared (NIR) light absorbent additives is fabricated. The effect of Cs x WO 3 nanoparticles on crystalline morphology, thermal physical behaviors and light transmittance of CaCl 2 ·6H 2 O are investigated. Additionally, thermal cycle tests are conducted for stability examination. Furthermore, thermal regulating performance of double layer glass window filled with the PCM composite is tested in small chambers by being sunlight irradiated under a solar simulator . All results manifest that with the incorporation of Cs x WO 3 nanoparticles, the salt hydrate PCM composite exhibits large latent heat, low supercooling degree and high NIR light shielding ability as well as good thermal stability . When employed as the glazing window of a test room, the PCM panel has functions of reducing indoor temperature fluctuations and increasing thermal inertia. Hence, the salt hydrate/nano Cs x WO 3 PCM design in this work shows great potentials for the development of solar energy storage products in energy conservation fields.
研究领域:
材料科学
·
能量存储
·
太阳能
·
热工程
✓ 已验证
产品关联
DOI
高影响因子
FIBERS AND POLYMERS
·
2025
·
IF 2.3
Xu Jing,Liu Jingxiao,Shi Fei,Xiao Jianbin,Pei Wen,Yu Chen
Developing fibers with integrated photothermal conversion and thermal storage functions provides a promising approach for personal thermal management. However, conventional phase change materials (PCMs) are limited by poor solar absorption and leakage issues, reducing their efficiency. Herein, a novel porous polyimide/Cs x WO 3 /GO composite aerogel fiber (PCGAF) was fabricated by freeze-spinning technology, using polyimide as the skeleton and incorporating Cs x WO 3 and graphene oxide (GO) as photothermal absorbers. Moreover, a PCGAF/PEG composite with enhanced phase change thermal storage capacity was obtained by vacuum-impregnating polyethylene glycol (PEG), as a phase change material, into the framework of PCGAF. The as-prepared aerogel fibers exhibit superior radiative heating, outstanding thermal stability, and excellent thermal management properties. The addition of an appropriate amount of GO improves the solar absorption efficiency of the composite aerogel fibers and provides a thermally conductive backbone, facilitating the rapid thermal response of PCGAF/PEG. The optimized PCGAF-1/PEG exhibited high PEG loading (91.5%) and high enthalpy (117.8 J/g). The dynamic thermal properties of the PCGAF/PEG can effectively regulate body temperature fluctuations, making them highly promising for next-generation smart textiles in personal thermal management.
研究领域:
材料科学
·
纳米技术
·
能量转换
·
纺织工程
·
热管理
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2021
·
IF 6.057
Jing Li,Dali Liu,Donglei Zhou,Long Shao,Xu Chen,Hongwei Song
In this work, a novel label-free photoelectrochemical (PEC) biosensor based on Au/Cs x WO 3 heterogeneous films with low background noise and excellent sensitive detection of alpha-fetoprotein (AFP) was proposed. We prepared Au/Cs x WO 3 heterogeneous films by different methods including template removal and spin coating . The surface plasmon resonances (SPR) of Au film and Cs x WO 3 semiconductor nanocrystals largely improved the photoelectrochemical properties of the electrodes and enhanced the photocurrent . Under the optimal conditions, the prepared PEC biosensor showed a linear response between photocurrent variation and the logarithm of AFP concentration in the range from 0.01 ng/mL to 500 ng/mL with a low detection limit of 7 pg/mL. In addition, the proposed PEC biosensor had excellent specificity, repeatability, long-term stability and showed satisfactory results in the analysis of human serum samples, which would have great prospect in clinical application and biological analysis in the future.
研究领域:
生物传感器
·
光电化学
·
纳米材料
·
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Materials
·
2025
·
IF 2.9
Liwu Fu,Jiangfeng Hu,Peng Luo,Dong Xiang,Wenying Hui,Lei Cheng,Yan Zhou,Xiong Zhengrong,Dengzun Yao,Xianghai Jing
The white weathering layer materials that can effectively block the entire solar light band is of great importance for improving the service life, safety, and reliability of the materials. In this work, CsxWO3@PDA was prepared by in situ polymerization to achieve high absorption in the full spectral range and increase the compatibility between CsxWO3 particles and polyvinylidene fluoride (PVDF). PVDF composite films with different particle contents were prepared through compounding with titanium dioxide (TiO2) and CsxWO3@PDA. The prepared composite films were characterized by FT-IR, field emission scanning electron microscopy, universal material testing machine, whiteness meter, and ultraviolet visible spectroscopy. The results showed that the CsPVDF composite films with CsxWO3@PDA and TiO2 exhibited a whiteness level higher than 74, a transmittance of less than 5% in the wavelength range of 200–2500 nm, and a transmittance close to zero in the range below 1750 nm, demonstrating excellent shielding effect. The xenon lamp aging test also confirmed that the composite films had excellent weather resistance after aging 500 h. At the same time, adding a certain amount of CsxWO3@PDA could improve the tensile strength of PVDF.
研究领域:
材料科学
·
聚合物工程
✓ 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）