Polymers
·
2018
·Vol. 10
·期 9
·979
·
IF 2.935
Chunfang Zhu,Haitao Yang,Hongbo Liang,Zhengyue Wang,Jun Dong,Lei Xiong,Jianping Zhou,Junjun Ke,Xi Xu,Weixian Xi
Low surface energy materials have attracted much attention due to their properties and various applications. In this work, we synthesized and characterized a series of ultraviolet (UV)-curable fluorinated siloxane polymers with various fluorinated acrylates—hexafluorobutyl acrylate, dodecafluoroheptyl acrylate, and trifluorooctyl methacrylate—grafted onto a hydrogen-containing poly(dimethylsiloxane) backbone. The structures of the fluorinated siloxane polymers were measured and confirmed by proton nuclear magnetic resonance and Fourier transform infrared spectroscopy. Then the polymers were used as surface modifiers of UV-curable commercial polyurethane (DR-U356) at different concentrations (1, 2, 3, 4, 5, and 10 wt %). Among three formulations of these fluorinated siloxane polymers modified with DR-U356, hydrophobic states (91°, 92°, and 98°) were obtained at low concentrations (1 wt %). The DR-U356 resin is only in the hydrophilic state at 59.41°. The fluorine and siloxane element contents were investigated by X-ray photoelectron spectroscopy and the results indicated that the fluorinated and siloxane elements were liable to migrate to the surface of resins. The results of the friction recovering assays showed that the recorded contact angles of the series of fluorinated siloxane resins were higher than the original values after the friction-annealing progressing.Keywords:ultraviolet (UV) curable coatings;low surface energy materials;fluorinated siloxane resin
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2018
·
IF 4.358
Siyuan Wang,Xinghao Wang,Chenguang Li,Xinxin Xu,Zhongbo Wei,Zunyao Wang,Ruijuan Qu
This paper evaluates the UV photodegradation of 17β-estradiol (E2) on silica gel and in natural soil with different soil components. Silica gel was chosen as a stable and pure support to simulate the photochemical behavior of E2 on the surface of natural soil. Ultraviolet light, rather than visible light, was confirmed to play a decisive role in the photodegradation of E2 on silica gel. The effect of three soil components, including humic acid (HA), inorganic salts, and relative humidity (RH), on the photochemical behavior of E2 on silica gel or soil under UV irradiation was then evaluated. Two HA concentrations (10 and 20 mg g −1 ) and three salts (ferric sulfate, copper sulfate and sodium carbonate) were observed to obviously inhibit the degradation of E2 on silica gel. Interestingly, nitrate was found to obviously improve the removal efficiency of E2. Both too-dry and too-wet conditions obviously reduced the removal rate of E2, and the optimum relative humidity (RH) value was found to be approximately about 35% (30 °C). Furthermore, twenty intermediate products and two major pathways were proposed to describe the transformation processes of E2 treated by UV irradiation, among which oligomers were found to be the major intermediate products before complete mineralization. The efficient UV removal of E2 on silica gel and natural soil suggested a feasible strategy to remediate E2 contaminated soil.
研究领域:
环境科学
·
毒理学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Kai Yin,Yongxiu Deng,Chengbin Liu,Qunying He,Yuanfeng Wei,Shuo Chen,Tongcai Liu,Shenglian Luo
Although UV/chlorine advanced oxidation process has been employed to treat contaminants, the roles of secondary radicals are generally negligible. The comprehensive evaluation of secondary radicals on contaminants degradation remains deficient. In this study, two typical neonicotinoid insecticides, imidacloprid (IMD) and thiacloprid (THIA), were degraded via UV/chlorine process. It is for the first time found that the existence of Cl − significantly promoted THIA degradation during UV/chlorine process, attributed to the formation of Cl 2 − . In addition, the effects of pH, fulvic acid (FA), and bicarbonate (HCO 3 – ) on the degradation of IMD and THIA were evaluated. Low pH was in favor of the degradation of IMD and THIA, while both FA and HCO 3 – had slight inhibition effects. Meanwhile, the degradation of IMD and THIA via UV/chlorine process was inhibited in real matrices. The existence of Br − heavily suppressed the degradation of THIA via UV/chlorine process. The initial transformation pathways of IMD and THIA involved electron transfer, H-abstraction, and then disproportionation or the methylene bridge cleavage, yielding hydroxyl and keto derivatives as well as free amine. Although the mineralization for IMD (29%) and THIA (35%) was low, the acute toxicity to Vibrio fischeri for the treated samples was lower than that for corresponding parent compounds. This study comprehensively evaluated the degradation of IMD and THIA via UV/chlorine process, highlighting Cl 2 − as an important reactive species for THIA elimination.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 8
·5161-5173
·
IF 2.779
Weng Siyuan,Zhao Man,Jiang Dayong
Organic/inorganic hybrid material properties and their interfaces are essential to obtain excellent device performance. In this paper, an heterojunction ultraviolet (UV) organic photodetector (OPD) based on organic/inorganic zinc oxide (ZnO)/aurum (Au)/poly (3,4-ethylenedioxythio-phene):poly(4-styrene-sulfonate) (PEDOT:PSS) was manufactured and display outstanding photoelectric performance. For the fabrication of ZnO/Au/PEDOT:PSS heterojunction UV OPD, this heterojunction exhibits excellent UV optical detection performance. And further analysis using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), energy dispersive X-ray (EDX) and atomic force microscope (AFM). Compared with ZnO UV PD, the responsivity of ZnO/Au/PEDOT:PSS heterojunction UV OPD reaches 0.181 A W −1 , which is about 3.69 times higher. Furthermore, ZnO/Au/PEDOT:PSS heterojunction UV OPD shows light-to-dark current ratio (I light /I dark ) (1.19 × 10 3 ), external quantum efficiency (EQE) (59%), detectivity (D*) (1.39 × 10 11 Jones) and linear dynamic range (LDR) (61.5 dB). The preparation of inorganic/organic ZnO/Au/PEDOT:PSS heterojunction UV OPD in this work exhibits small organic/inorganic stress at the heterojunction, which provides new insights for the research of organic/inorganic hybrid UV OPDs and application prospects.
研究领域:
材料科学
·
光电子学
·
有机/无机杂化材料
✓ 已验证
DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Liu Xiangyun,Chai Youzheng,Gu Yuwei,Li Yongqi,Wang Xiao,Wang Qiancheng,Zhang Gong,Liu Huijuan,Qu Jiuhui
High-salinity mine water generated during membrane concentration of mine water contains structurally stable complex organic matter that resists removal and mineralization by conventional advanced oxidation processes, ultimately producing low-value by-product salts that hinder the resource utilization pathway. Leveraging the ultraviolet sensitivity of inherent chromophore groups and conjugated structures, this study developed an ultraviolet-activated assisted electrochemical process. By harnessing ultraviolet/oxidant synergies, this approach achieves ~89.9% total organic carbon removal, with minimal performance decay over 1000 hours. Combined with ultraviolet-visible spectroscopy, fluorescence excitation-emission-matrix spectroscopy, fourier transform ion cyclotron resonance mass spectrometer, and model contaminant experiments, this study elucidates an ultraviolet activation and radical attack synergistic mechanism driving organic mineralization. The direct integration of purified brine with bipolar membrane electrodialysis successfully produces acid, high-purity alkali (>99%), and reusable water, thereby closing the loop of impurities removal and resource recovery. This integrated system offers a strong strategy for high-value resource recovery and sustainable mine water management.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xiaolong Zhang,Weiwei Liu,Ruiying Xu,Dongmei Wu,Naitian Zhang,Xiaoyan Yu,Ximing Cui,Jinlian Li
The directional self-transport of water droplets holds significant application value in fields such as microfluidics and water collection. Current research mostly focuses on single wettability gradients or fixed surface structures, lacking systematic exploration of dynamic wettability regulation and SnO 2 -based intelligent surfaces. In this study, a triangular-patterned SnO 2 surface (TPSS) was constructed via anodic oxidation combined with ultraviolet (UV) irradiation. Dynamic regulation of surface wettability was achieved by adjusting the UV irradiation time, and the influence of wettability changes on the self-transport behavior of water droplets was systematically investigated. The results showed that no directional self-transport of water droplets occurred when the water contact angle (WCA) was greater than 33°; water droplets transported directionally in a droplet-like form when the WCA ranged from 10° to 33°; when the WCA was less than 10°, water droplets spread into a film-like form with a significant decrease in transport speed, but the addition of a second water droplet could recondense them and restore their self-transport capability. Combined with X-ray photoelectron spectroscopy (XPS) characterization and in-situ optical observation, the synergistic regulation mechanism of Laplace pressure difference and hysteresis force was clarified. Moderate UV irradiation enhances surface hydrophilicity, and the Laplace force generated by the curvature difference overcomes the hysteresis resistance to drive the droplet transport. Excessive UV irradiation, causing the water droplets to spread and the Laplace force to attenuate, while the liquid film can restore the droplet-like form and transport capability through a buffering effect. This study provides an experimental basis and theoretical support for the design of dynamically adjustable microscale water droplet self-transport intelligent surfaces, expands the application of SnO 2 in fields such as microfluidics and micro-detection, and realizes an efficient fog collection function based on TPSS.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2026
·
IF 8.2
Chengwan Wang,Junchen He,Aoyu Shen,Tong Xie,Ruo Huang,Xian Wu,Yue Yuan,Sheng-Tao Yang
Nitrate (NO 3 - ), a prevalent pollutant in aquatic ecosystems, poses significant ecological and human health risks due to its excessive accumulation, which accelerates eutrophication. In this study, a novel bimetallic material (B-Fe/Cu) was synthesized via high-energy ball milling using micron-sized zero-valent iron (ZVI) and copper salts. When integrated with ultraviolet (UV) light, the UV/B-Fe/Cu system achieved complete conversion (100%) of 10 ppm NO 3 - -N within 120 minutes. Intriguingly, abundant Cu species were found to mediate the efficient redox cycling between Fe 3+ and Fe 2+ , and superoxide radicals (O 2 ·- ) facilitated the redox cycling between Fe 3+ /Fe 2+ and Cu 2+ /Cu + , while the localized micro-acidic microenvironment of B-Fe/Cu enabled the dynamic pH regulation during nitrate reduction. These triple functionalities ensured the full nitrate conversion in UV/B-Fe/Cu system without toxic NO 2 - byproduct formation across a wide pH range of 3.0-11.0. Furthermore, the UV/B-Fe/Cu system demonstrated exceptional operational stability and environmental robustness, retaining >90% reduction efficiency after four consecutive reuse cycles. These insights advance the rational design of iron-based materials for scalable and sustainable water purification technologies.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Tiansong Dai,Guifang Ju,Yang Lv,Yahong Jin,Haoyi Wu,Yihua Hu
Here, a new LiYGeO 4 : Eu 3+ phosphor exhibiting long red persistent luminescence (PerL) is developed herein. Experimental results show that LiYGeO 4 : Eu 3+ with a low doping concentration of Eu 3+ emits high-intensity red PerL, which lasts for more than 21 h. The red PerL of the preirradiated LiYGeO 4 : Eu 3+ phosphor can be repeatedly excited to increase its intensity via short-term stimulation using low-energy near-infrared (NIR) light. Furthermore, LiYGeO 4 : Eu 3+ exhibits strong intrinsic emission, enhancing the f-f emission of Eu 3+ . The PerL emission, photoluminescence (PL) emission, and thermoluminescence (TL) spectra are identical, suggesting the emission originating from the host and Eu 3+ center. TL measurements were conducted to intensively study the trap characteristics of LiYGeO 4 : Eu 3+ using the Booth-Bohun and T m -T stop methods. Results reveal the underlying mechanism of the PerL and the importance of Eu 3+ as the introduced traps in LiYGeO 4 : Eu 3+ . LiYGeO 4 : Eu 3+ with a high doping concentration of Eu 3+ exhibits excellent PL properties and thermal stability, with its quantum efficiency surpassing those of commercial phosphors such as Y 2 O 3 : Eu 3+ , suggesting its potential application in solid-state lighting. Thus, the doping of LiYGeO 4 : Eu 3+ with low and high concentrations of Eu 3+ can be helpful in fabricating materials exhibiting different luminescence properties.
研究领域:
材料科学
·
光学
·
光子学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 102
·100519-100525
·
IF 3.289
Fei Wang,Yang Qiu,Bing-Jie Wang,Hua-Lin Wang,Yi-Tao Long
A green method was developed to fabricate a novel porous polymer microsphere with SERS activity, which can be used for ultrasensitive detection because of its preconcentration function. Ultraviolet irradiation as “green” reduction was successfully achieved through several complex processes, namely, monomer solidification, hydrogen peroxide photolysis, and silver nanoparticle fabrication, in only one step. During the solidification process, H2O and O2, which are originally from H2O2 reduction, escaped from the emulsion templates, resulting in various interconnected micro-/nano-channels. The mean pore size of the prepared porous microspheres was 4 μm, and the specific surface area can reach 31 m2 g−1. The silver nanoparticles produced in the reduction process of silver nitrate were deposited on the porous surface of the microsphere and contributed to stable SERS activity with a SERS enhancement factor of up to 3.8 × 106 and a low detection limit of 10−13 M level for rhodamine 6G. This green method provides highly sensitive and uniform SERS substrates and ensures the stability and reliability of our “SERS substrate”.
研究领域:
分析化学
·
材料科学
·
纳米技术
·
生物传感
·
物理化学
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2017
·Vol. 75
·期 12
·2935-2951
·
IF 1.197
Peng Mingguo,Li Huajie,Kang Xu,Du Erdeng,Li Dongdong
The removal of ibuprofen (IBP) in aqueous solution using UV/H 2 O 2 process was evaluated. The response surface methodology (RSM) and Box–Behnken design were employed to investigate the effects of process parameters on IBP removal, including the initial IBP concentration, H 2 O 2 dosage, UV light intensity, and initial pH value of solution. The RSM model developed herein fits well with the experiments, and provides a good insight into the OH radical irritated degradation mechanisms and kinetics. High resolution accurate mass spectrometry coupled with liquid chromatography was used to identify the degradation intermediates. A total of 23 degradation products were identified, including mono-hydroxylated products and dihydroxylated products. A series of OH radical-initiated reactions, including hydroxylation, dihydroxylation, decarboxylation, demethylation, ring break, lead to the final mineralization of IBP to CO 2 and H 2 O. UV/H 2 O 2 technology could be a promising technology for IBP removal in aqueous solution.
研究领域:
环境化学
·
水处理技术
·
药物降解
·
环境污染物治理
·
高级氧化技术
✓ 已验证
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2015
·Vol. 122
·期 1
·329-338
·
IF 2.042
Bu Jiang,Liang Hongbo,Zhang Dandan,Xiong Lei,Huang Shengmei
N , N′ -bis(2,4-di(acryloyloxyethyl)-[1,3,5]-triazin-2-yl)-hexane-1,6-diamine(BDAETH) and 2,2-dimethyl-1,3-propanediol glycerol-methacrylate phosphate (PGMH) were synthesized from cyanuric chloride and phosphorus oxychloride. BDAETH and PGMH were further blended in different ratios to prepare UV-curable intumescent flame-retardant coatings. The thermal behaviors of their cured films were studied by thermal gravimetric analysis, and the results showed that degradation process of cured blend films could be divided into three degradation regions. The degradation mechanism was further investigated by in situ Fourier transform infrared spectra. The flame-retardant properties and the expansion process of the intumescent flame-retardant coatings were further monitored by limiting oxygen index and a self-made equipment, which indicated the synthetic effect between BDAETH and PGMH.
✓ 已验证
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 40
·2400578
·
IF 13
Yike Du,Aotian Li,Fan Zhang,Han Gao,Xuan Zhou,Jiliang Zhu,Zhicheng Ye
Passive radiative cooling (PRC) can spontaneously dissipate heat to outer space through atmospheric transparent windows, providing a promising path to meet sustainable development goals. However, achieving simultaneously high transparency, color-customizable, and thermal management of PRC anti ultraviolet (anti-UV) films remains a challenge. Herein, a simple strategy is proposed to utilize liquid crystalline polymer, with high mid-infrared emissive, forming customizable structural color film by molecular self-assembly and polymerization-induced pitch gradient, which guarantees the balance of transparency in visible spectrum and sunlight reflection, rendering anti-UV colored window for thermal management. By performing tests, temperature fall of 5.4 and 7.9 °C are demonstrated at noon with solar intensity of 717 W m −2 and night, respectively. Vivid red-, green-, blue-structured colors, and colorless films are designed and implemented to suppress the solar input and control the effective visible light transmissivity considering the efficiency function of human vision. In addition, temperature rise of 11.1 °C is achieved by applying an alternating current field on the PRC film. This study provides a new perspective on the thermal management and aesthetic functionalities of smart windows and wearables.
研究领域:
材料科学
·
高分子化学
·
光学工程
·
能源材料
·
纳米科技
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）