JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 12
·126503
·
IF 3.9
Mengtao Sun,Likun Wang,Guohua Shi,Qiying Liu,Gang Xu,Yong Liu,Gaorong Han
Dual-band electrochromic (EC) smart windows, capable of selectively regulating visible (VIS) and near-infrared (NIR) light, are one of the most attractive candidates for significantly reducing the energy consumption of buildings. Niobium-tungsten bimetallic oxides exhibit a fast ion exchange rate and high cycle stability in the electrochemical field because of various structural chemistry in the pseudobinary system Nb2O5/WO3, showing excellent dual-band EC potential. Herein, we employ a facile hydrothermal technique to synthesize Nb18W16O93 (NWO) films with low temperature and facile procedure. The obtained NWO films exhibit impressive dual-band electrochromic performances, including high optical regulation (radiation blocking rates of 33.1% and 77.5% in the VIS and NIR band) and short coloring/bleaching time (12 s/2.6 s at 633 nm and 6.5 s/6.1 s at 1600 nm). These results demonstrate that NWO is a high-performance dual-band EC material and provide a practical strategy to synthesize the NWO electrodes with nanorod stacking architectures in a facile and low-cost way.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Zhixuan Zhang,Dongsheng Zhuang,Yutong Niu,Junyi Wang,Hongliang Zhang,Wei Cheng
It is reported that by introducing structural water into amorphous tungsten oxide and using multivalent Al 3+ as electrolyte ions, the tungsten oxide hydrate films exhibit dramatically enhanced dual-band EC performance. The structural water triggers the surface reduction of tungsten at a relatively low reduction potential, which governs the selective regulation of NIR light. The fast electrochemical kinetics and negligible structural destruction during the surface redox process enable fast and ultrastable NIR regulation. Increasing the reduction potentials, the Al 3+ intercalates into the lattice, accompanied by injection of electrons, resulting in the formation of polaron absorbing visible light. The high charges and small radius of Al 3+ , and the enlarged ion diffusion channels by structural water synergistically facilitate the ion insertion/extraction, leading to enhanced EC performance in the visible light region. The tungsten oxide hydrate film is used as a working electrode to pair with an electrocatalytic counter electrode, with the presence of redox couples in Al 3+ based electrolyte, to form a full EC device that exhibits NIR selectivity of 0.66, and cycling stability of 20 000 cycles in NIR region and 8000 cycles in visible region, which enables to design and fabricate large-size high-performance dual-band EC smart window for controllable management of solar heat and light.
研究领域:
材料科学
·
能源技术
·
纳米技术
✓ 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
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
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能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2022
·
IF 4.01
Yu Liu,Peng Yang,Keke Zhang,Jun Xu,Songgu Wu,Junbo Gong
Mechanical flexible organic crystals with optical properties have attracted increasing research interest, because of their unusual phenomena and broad application prospects. However, achieving both plasticity and luminescent properties in organic crystals is difficult. Here we report a plastic organic crystal, flufenamic acid (FFA) form III crystal, which shows highly plastic bending along (001) face and hand-twistable behavior under applied external force. It also illustrated a unique bending mechanofluorochromism behavior. In summary, the proposed soft single crystal with mechanical induced fluorescence modulation appears to be of interest to the design of future tunable fluorescent materials.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2021
·
IF 5.279
Yinyin Liao,Haibo Tan,Guotai Jian,Xiaochen Zhou,Luqiong Huo,Yongxia Jia,Lanting Zeng,Ziyin Yang
Tea (Camellia sinensis) is the most popular nonalcoholic beverage worldwide. During cultivation, tea plants are susceptible to herbivores and pathogens, which can seriously affect tea yield and quality. A previous report showed that (Z)-3-hexenol is a potentially efficient defensive substance. However, the molecular mechanism mediating (Z)-3-hexenol signaling in tea plants and the resulting effects on plant defenses remain uncharacterized. To clarify the signaling mechanisms in which (Z)-3-hexenol and light are involved, the gene transcription and metabolite levels were assessed, respectively. This study demonstrated that tea plants rapidly and continuously release (Z)-3-hexen-1-ol in response to an insect infestation. (Z)-3-Hexen-1-ol absorbed by adjacent healthy plants would be converted into three insect defensive compounds: (Z)-3-hexenyl-glucoside, (Z)-3-hexenyl-primeveroside, and (Z)-3-hexenyl-vicianoside identified with laboratory-synthesized standards. Moreover, (Z)-3-hexen-1-ol also activates the synthesis of jasmonic acid to enhance the insect resistance of tea plants. Additionally, a continuous light treatment induces the accumulation of (Z)-3-hexenyl-glycosides. Hence, (Z)-3-hexenol serves as a light-regulated signaling molecule that activates the systemic defenses of adjacent plants. Our study reveals the molecular mechanisms by which biotic and abiotic factors synergistically regulate the signaling functions of herbivore-induced plant volatiles in plants, providing valuable information for future comprehensive analyses of the systemic defense mechanisms in plants.
研究领域:
植物学
·
分子生物学
·
生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2024
·Vol. 12
·期 21
·2400673
·
IF 8
Hong Jia,Zihao Chen,Yiping Chen,Xilin Wang,Jie Wei
In this study, a multi-monomer organohydrogel network is fabricated based on radical polymerization. Acrylic acid (AA) and dimethylaminoethyl methacrylate (DMAEMA) are used as hydrophilic monomers, and methoxyethyl acrylate (MEA) serves as a hydrophobic monomer. To endow the organohydrogel with a photo-responsive property, a fluorescent monomer, 1′-acryloyl chloride-3′,3′-dimethyl-6-nitrospiropyran (SPMA) is added. Under ultraviolet (UV) and visible light irradiation, SPMA undergoes ring-opening and ring-closing isomerization reactions, respectively. This leads to enhanced and reduced fluorescence. This fluorescence tunability allows for the local regulation of fluorescence in the organohydrogel using a photomask. By employing UV and visible light, complex information can be repeatedly written and erased on the organohydrogel. Additionally, based on the interactions between dimethyl sulfoxide (DMSO) and water within the system, the organohydrogel exhibits excellent anti-freezing and water-holding properties, allowing its use in low-temperature environments and extended preservation time. The organohydrogel has precise information writing capabilities and is more difficult to falsify as an information encryption platform. This study provides guidance for future researchers to develop information writing capabilities with higher precision and broader applications in various environments using smart materials.
研究领域:
材料科学
·
化学工程
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 8
·3159-3169
·
IF 4.569
Qinghong Meng,Guoying Zhao,Qi Zhu,Xudong Sun,Ji-Guang Li
Doping Gd2LuAl5O12:Ce with a Ca2+/Si4+ pair produced a series of Gd1.97−xLuCaxAl5−xSixO12:0.03Ce (x = 0.0–1.2) garnet new phosphors, and remarkable regulation of the crystal structure and Ce3+ luminescence was achieved. Rietveld refinement and spectral analysis revealed that greater incorporation of Ca2+/Si4+ led to a higher lattice rigidity by cell contraction, a narrower bandgap, a longer average bond length/less distortion of the [CeO8] dodecahedron and decreased centroid shift/crystal field splitting of the Ce3+ 5d energy level. A blue-shifted 4f–5d1 transition, a narrower emission band, improved thermal stability of luminescence and a shorter fluorescence lifetime were observed with increasing Ca2+/Si4+ content. Applying the yellowish-green-emitting Gd0.77LuCa1.2Al3.8Si1.2O12:0.03Ce optimal phosphor (x = 1.2), together with a commercial CaAlSiN3:Eu red phosphor, in 450 nm-excited LED lighting produced a low CCT of ∼3625 K and a high CRI/R9 of ∼95.2/94.8, indicating that the phosphor has application potential in high-performance w-WLED.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Xiao-Yi Liu,Qiu-Ying Lin,Han Fang,Xing-Wang Li,Shu-Ming Zhang,Mei-Hui Yu,Ze Chang
Metal–organic frameworks (MOFs) have been recognized as a potential platform for the development of tunable luminophores owing to their highly modulable structures and components. Herein, two MOF luminophores based on Cd(II) ions, 1,3,5-tri(4-pyridinyl)benzene (TPB), and 1,4-dicarboxybenzene (H2BDC) were constructed. The directed assembly of the metal ions and organic linkers results in [Cd2(BDC)2(TPB)(H2O)]·x(solvent) (MOF-1) featuring TPB-based blue fluorescence centered at 425 nm. By introducing anthracene as the structure directing agent (SDA) for assembly regulation, [Cd2(BDC)(TPB)2(NO3)2]·x(solvent) (MOF-2) was obtained, which reveals anthracene feeding-dependent high tunable emission in the 517–650 nm range. Detailed components, photophysical properties, and structural characteristics investigations of MOF-2 indicate the TPB and NO3– interactions as the origin of its redshifted emission compared with that of MOF-1. Furthermore, the fluorescence of MOF-2 was found to be regulatable by the anthracene feeding based on the SDA-determined crystallinity of the crystalline sample. All these results provided a unique example of the structural and fluorescence regulation of MOF luminophores.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiajing Zhang,Yaqin Han,Junan Fang,Jia An,Jincai Peng,Xiaohui Zhu,Yufei Liu
Aggregation-induced emission (AIE) materials have garnered significant interest due to their unique optical properties, unlike traditional fluorophores. The combination of AIE with aggregation-caused quenching (ACQ) materials presents an intriguing avenue for precise regulation of luminescent behavior. However, materials with both AIE and ACQ effects are rarely reported. Herein, a novel pyrene-based double emission AIE material (DE-AIE) is synthesized, which can enable precise luminescence regulation through the manipulation of aggregation states and protonation levels. Specifically, as the volume fraction of the poor solvent water increases, DE-AIE undergoes successively the quenching of green fluorescence caused by π-π stacking between molecules and the enhancement of orange fluorescence due to the restriction of intramolecular motions. In addition, DE-AIE exhibits further red-shifting of the absorption and emission peaks in response to acid, which is attributed to the enhancement of intermolecular charge transfer resulting from the protonation. And the reversible acid-base fluorescence regulation was demonstrated by acid-base cycle experiments. The fluorescence emission peak of DE-AIE after adding acid present an apparent redshifted (116 nm) from that in the dispersed state, endowing a broad wavelength range for regulating luminescence through aggregation and protonation. Furthermore, the relationship between the luminescence mechanism and the intermolecular or intramolecular interactions of materials during aggregation was explored by nuclear magnetic resonance titration experiment. Based on the unique luminescent characteristics, DE-AIE holds significant potential for applications in recyclable molecular “Traffic Signals”, information encryption with multilevel, and visual sensing of multi-gradient humidity.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 32
·期 2
·2107086
·
IF 18.808
Yu Ouyang,Xingxing Jiang,Feng Jiang,Lihui Li,Hepeng Zhao,Chi Zhang,Min Zheng,Weihao Zheng,Ying Jiang,Xiaoli Zhu,Yexin Feng,Xiujuan Zhuang
Understanding and manipulating the photoluminescence (PL) of all-inorganic perovskites is significant in applications toward light-emitting diodes. Doping has proved to be a very promising approach for tuning the luminescence properties of perovskites. Herein, rare earth (Er and Yb) doped 3D all-inorganic perovskite flakes (CsPb(Cl/Br) 3 ) are synthesized. At room temperature, they possess a narrow emission peak at 506 nm with 10 nm linewidth and a quite broad peak at 700 nm with 170 nm linewidth, which are from band-edge PL of α-CsPb(Cl/Br) 3 and self-trapped excitons of δ-CsPb(Cl/Br) 3 , respectively. When exposing the flakes under a light-soaking, the samples present a color tuning capability spanning from red to green by extension of the soaking time, and the emission properties can recover by removing the light-soaking and undergoing a certain recovery time. Time-resolved photoluminescence indicates a photoinduced reduction of defects density in the doped perovskite flakes. Based on further density functional theory calculations, a photoinduced O 2 -diffused defect-passivation mechanism is proposed. The discovery is expected to promote the optical tuning capability of the all-inorganic perovskites and expand their potential application in optoelectronics devices.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Chen Fei Dai,Xin Ning Zhang,Cong Du,Andreas Frank,Hans-Werner Schmidt,Qiang Zheng,Zi Liang Wu
Gradient materials exist widely in natural living organisms, affording fascinating biological and mechanical properties. However, the synthetic gradient hydrogels are usually mechanically weak or only have relatively simple gradient structures. Here, we report on tough nanocomposite hydrogels with designable gradient network structure and mechanical properties by a facile post-photoregulation strategy. Poly(1-vinylimidazole-co-methacrylic acid) hydrogels containing gold nanorods (AuNRs) are in a glassy state and show typical yielding and forced elastic deformation at room temperature. The gel slightly contracts its volume when the temperature is above the glass-transition temperature that results in a collapse of the chain segments and formation of denser intra- and interchain hydrogen bonds. Consequently, the mechanical properties of the gels are enhanced, when the temperature returns to room temperature. The mechanical performances of hydrogels can also be locally tuned by near-infrared light irradiation due to the photothermal effect of AuNRs. Hydrogels with arbitrary two-dimensional gradients can be facilely developed by site-specific photoirradiation. The treated and untreated regions with different stiffness and yielding stress possess construct behaviors in stretching or twisting deformations. A locally reinforced hydrogel with the kirigami structure becomes notch-insensitive and exhibits improved strength and stretchability because the treated regions ahead the cuts have better resistance to crack advancement. These tough hydrogels with programmable gradient structure and mechanics should find applications as structural elements, biological devices, etc.
研究领域:
材料科学
·
生物工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）