DYES AND PIGMENTS
·
2021
·
IF 4.889
Siyuan Tang,Da Chen,Changxing Wang,Yongsheng Yang,Xiameng Li,Tingting Li,Xiaohong Zhang
Nitrogen and sulfur co-doped graphene quantum dots (N, S-GQDs) are prepared by using o-phenylendiamine and catechol as raw materials under UV irradiation in dimethyl sulfoxide (DMSO) solution for 2 h. The resultant N, S-GQDs show uniform size, good crystallinity and fluorescence stability. The tunable polychromatic luminescence is obtained by adjusting the concentration of N, S-GQDs. Then, N, S-GQDs/HPMC composite material is designed and synthesized, which exhibits light responsive optical switching performance owing to micro-aggregation efficacy of N, S-GQDs to transform light into heat and drive the phase transition of hydroxypropyl methyl cellulose (HPMC). Therefore, the prepared N, S-GQDs/HPMC with excellent solar modulation ability can easily switch between opaque and transparent states depending on weather condition. In the end, the thermoresponsive property of N, S-GQDs/HPMC endows it with good performance as functional materials matrix.
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DOI
高影响因子
ChemElectroChem
·
2020
·Vol. 7
·期 12
·2599-2607
·
IF 4.154
Zhuang Yang,Yingwu Luo,Xiang Gao,Rui Wang
Graphical Wearable ASSLIB : In situ polymerization on the electrode can enhance the adhesion between the electrode and the electrolyte, resulting in enhanced cycle and rate performance of all-solid-state lithium-ion batteries (ASSLIBs). The development of wearable electronic devices prompts the demand for high-safety all-solid-state lithium-ion batteries (ASSLIBs), which can work at ambient temperature with comparable performance to traditional commercial lithium-ion batteries. In this work, a three-dimensional network design to overcome the contradiction between ionic conductivity and mechanical strength in polymer electrolytes is proposed. The designed solid polymer electrolyte (SPE) has the ion-conducting group (oligomeric ethylene oxide) fixed on the side chains, whereas the main chain is crosslinked polyacrylate, providing good mechanical strength. Succinonitrile (SN) is uniformly dispersed in the cross-linked network as an additive. The prepared SN−SPE shows a high ionic conductivity of 4.6×10 −4 S cm −1 at 25 °C with a Li + -ion transference number of 0.45 and an excellent electrochemical stability window up to 4.6 V (vs. Li + /Li). The preparation method allows that the electrolyte can be UV-cured in situ on the cathode to achieve a cathode-electrolyte integrated electrode, which enhances the interface contact and decreases the interface resistance. As-fabricated LiFePO 4 //Li 4 Ti 5 O 12 cathode-electrolyte integrated ASSLIBs can deliver a discharge capacity of 155.88 mAh g −1 at 0.2 C at room temperature and a capacity retention up to 93.62 % after 100 charge-discharge cycles. The reported polymer electrolyte and advanced assembly process provided a promising strategy for the wearable ASSLIBs.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Jian Ma,Yueyue Wu,Lei Dong,Mengyue Yu,Zhendong Zhu,Le Zhang,Linchao Zhang,Hongfa Xiang
Cathode–electrolyte integration via in-situ polymerization is an effective strategy to reduce interfacial resistance in solid-state/quasi-solid-state lithium batteries ; however, ion conduction in the fraction of polymer electrolyte is still to be enhanced. Herein, we demonstrate a separator-free cathode–electrolyte integrated structure employing a novel poly(di(ethylene glycol) ethyl ether acrylate)-based quasi-solid polymer electrolyte (LiTFSI-poly(DEGA)-FEC QSPE, denoted as PDEGA-QSPE), prepared via UV-assisted in-situ polymerization. Poly(DEGA) as a linear polymer contains abundant ethylene oxide (EO) segments in its branched chain, exhibiting excellent flexibility and high adhesion. Benefited from the flexible molecular structure, PDEGA-QSPE exhibits a glass transition temperature ( T g ) as low as around −68 °C and a good room-temperature ionic conductivity of 2.3 × 10 −4 S cm −1 , and it also shows an oxidative potential up to 4.7 V. The LiFePO 4 |PDEGA-QSPE|Li battery possesses an initial capacity of 149.2 mAh g −1 and a capacity retention of 92.5 % after 300 cycles at 0.2 C under room temperature, and poly(DEGA)-based QSPE also has the potential to be applied to the high-voltage NCM811||Li battery. Compared with widely-employed monomers for in-situ polymerization such as poly(ethylene glycol) diacrylate (PEGDA), poly(DEGA) possesses remarkably improved flexibility and ion conduction capability, exhibiting broad research and application prospects.
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高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 13
·期 5
·2356-2366
·
IF 5.7
Xiaowen Zhao,Chuangen Xu,Jindi Wei,Haobo Wang,RuiPeng Yang,Xiaoliang Wang,Xiaojun Ye
Silicon heterojunction (SHJ) solar cells have enormous application prospects due to their high efficiency and small carbon footprint. However, during long-term use, the i-a-Si passivation layer of heterojunction (SHJ) solar cells tends to be destroyed by ultraviolet radiation, causing performance degradation. To eliminate this impact, downshifting (DS) materials of YVO4:Eu3+,Bi3+ on the glass surface absorb ultraviolet light and convert it to wavelengths with a higher spectral response of SHJ solar cells. Furthermore, adding anti-reflection (AR) layers on the DS layer's surface will help maintain high transmittance and weather resistance. YVO4:Eu3+,Bi3+ is prepared by using a wet chemical method, with no need for additional manufacturing of phosphors. The DS layer achieves uniform luminescence and expands the excitation spectrum. The average transmittance of glass coated with downshifting and anti-reflection (DSAR) is 96.80%, higher than that of glass with AR only. After high temperature and high humidity tests, the average transmittance of DSAR glass and the short-circuit current density of the module decreased by 1.44% and 0.59 mA cm−2, much lower than that of AR coating (decreased) samples, which decreased by 2.53% and 1.43 mA cm−2. After the UV test, the luminous intensity of the DSAR layer is much higher than that of the DS layer. Therefore, the DSAR layer could offer an easy industrialization approach to improve the outdoor reliability of SHJ solar cells.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2020
·
IF 4.244
Zhuangzhuang Chu,Yechang Feng,Bingqing Xie,Yu Yang,Yang Hu,Xiaohua Zhou,Teng Yuan,Zhuohong Yang
Materials with high bio-content have gradually replaced petroleum-based materials due to their sustainability, low cost, low toxicity and excellent performance in the field of UV-LED curable coatings. A novel tung oil-based methacrylate (TDMM) with low viscosity and multiple photopolymerizable methacrylates was designed and synthesized through three steps containing amidation, thiol-ene click reaction and esterification. The reaction conditions for thiol-ene click reaction were optimized by calculating double bond conversion and degree of functionalization of polyols. The chemical structures of the as-prepared TDMM were characterized by 1 H NMR and FTIR. The rheological behavior analysis indicated that TDMM exhibited lower viscosity than petrochemical-based reactive diluent pentaerythritol triacrylate (PETA). Subsequently, TDMM showed good copolymerization ability with soybean oil-based reactive monomer (AESO) under the “green + green” UV-LED curable systems with high bio-content (61–81% in theory). The TDMM/AESO systems showed higher T g but lower thermal stability, better modulus and tensile strength than the neat AESO. Besides, the UV-LED cured coatings exhibited excellent physical and chemical properties. This bio-renewable tung oil-based monomer is shown to be an effective reactive diluent and considered to have good potential in the development of the UV-LED curable coatings.
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高影响因子
APPLIED CLAY SCIENCE
·
2023
·
IF 5.6
Xuan Wang,Hao Ding,Zhuoqun Xu,Jianmeng Zhang,Yanbin Yao
To enhance the anti-aging property of a superhydrophobic self-cleaning coating, rutile nano-TiO 2 was loaded onto the surface of sericite via wet grinding method to prepare sericite-rutile composite particles. Then, the composite was modified with hexadecyltrimethoxysilane (HDTMS) and sprayed onto the substrates surfaces to prepare sericite-rutile/HDTMS composite coatings with both UV shielding and superhydrophobic self-cleaning properties. The structure, properties, and mechanism of the coating were studied. The research showed that the micro-nanoscale hierarchical structure has been constructed by compositing sericite and rutile, which were the structure foundation of superhydrophobic coatings. The sericite-rutile composite was modified with HDTMS and sprayed onto the substrates forming a superhydrophobic self-cleaning coating. Water contact angles (WCAs) and slide angles (SAs) of the coating were 155.3° and 1.3°, respectively. The sericite-rutile/HDTMS coating exhibited good UV shielding and anti-aging properties. Its UV shielding rate was 93.53%, which was equivalent to that of pure rutile (94.27%). After UV irradiation for 80 h, the surface maintained superhydrophobicity, and the chromaticity of the coating surface did not change. The superhydrophobicity and low adhesion to water of the sericite-rutile/HDTMS coating are due to the micro-nano hierarchical structure of the sericite-rutile composite and the low surface energy of HDTMS. The UV shielding effect of the coating is mainly due to the strong absorption of UV light by the sericite-rutile composite. This work provides a simple and environmentally friendly method for constructing a coating with UV shielding and superhydrophobic self-cleaning properties.
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高影响因子
Journal of Food Measurement and Characterization
·
2023
·Vol. 18
·期 3
·1734-1739
·
IF 3.4
Hao Lingchuan,Xu Wenxue,Wu Minghuo
Proanthocyanidins (PCs), known as natural antioxidants capable of scavenging free radicals, are rich in blueberry as oligomeric proanthocyanidins (OPCs). Aim to efficiently determine the total PCs in blueberry, a simple method of dispersive solid phase extraction (DSPE) followed by UV–Vis spectrophotometry detection was developed, in which C18-bonded silica microspheres were used as absorbent to purify the targets, and vanillin–HCl was applied for chromogenic reaction. After systematic optimization of DSPE conditions, reliable determination of total PCs was achieved. Though the sensitivity of this method was not comparable to those based on high performance liquid chromatography or mass spectrometry, it was simple and reliable for the analysis of PCs-rich fruits. With this method, impacts of storage conditions including time and temperature, as well as the freshness on total PCs concentration in blueberry were investigated. The results revealed that with the increase of storage time or temperature, the total PCs decreased accordingly. Meanwhile, the highest concentration of total PAs was found in the freshest blueberries stored at a low temperature of 4 °C, which supported that the low temperature was favorable for blueberry storage, showing the practical significance for the storage of PCs-rich fruits.
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高影响因子
INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
·
2025
·
IF 5.2
Dan Liu,Yaokun Pang,Shenrui Pan,Jianxia Sun
More attention has been paid to developing new antibacterial drugs from natural products due to antibacterial resistance. Ferulic acid (FA) is a natural phenolic acid with demonstrated antimicrobial effects. However, its bactericidal activity is insufficient to achieve a rapid bacteria reduction in a short time. This study demonstrates the antimicrobial activity and synergistic interaction of FA in combination with ultraviolet A (UV-A) against Escherichia coli (E. coli) . The synergistic activity against E. coli was concentration and time-dependent. A set of associated changes in cellular functions of E. coli including membrane integrity, cell membrane permeability and DNA damages were measured. Morphologically, the treated cells exhibited a bacterial membrane and DNA dysfunction. Furthermore, the photostability and photochemical pathway of FA upon UV-A exposure was investigated. A rapid photochemical degradation of FA upon UV-A irradiation was observed due to the photoisomerization process of FA. Type II reaction was assumed as the main photochemical pathway as evidenced by the actions of different quenching agents. Antibacterial activity of FA + UV-A was also tested on chicken breast meat. A reduction of the loads of E. coli bacteria on chicken and good maintenance of its quality was achieved. This combination of methods helps to reduce the use of chemical food preservatives and provide new ways to control pathogenic microorganisms in food industry.
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Chen-Yuan Ma,Yu-Ming Pan,Pei Han,Mei-Hong Duan
Development of new birefringent crystals with enhanced properties remains an ongoing research priority. Through the exploration of guanidinium-containing oxalates with the structural modulation of Pb 2+ and Cl - , a new birefringent crystal, [C(NH 2 ) 3 ]Pb(C 2 O 4 )Cl·H 2 O (GPCCH), was successfully obtained. GPCCH was characterized by two types of π-conjugated building units, which contributes to the coexistence of a wide bandgap of 3.98 eV and a large birefringence of 0.24@546 nm. These findings highlight the synergistic role of π-conjugated building units and partially-chlorinated lead-containing units played in generating fascinating UV birefringent crystals.
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高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Xinhan Chen,Gaofan Chen,Ya-Nan Feng,Lizhen Zhang,Yan Yu,Lingyun Li
Developing single-component white-light phosphors remains challenging due to the difficulty in achieving dual emission from mixed-valent activators. Herein, we present a carbon-modulated reduction synthesis (CARS) method to fabricate Eu2+/Eu3+ co-doped La3Si2O8Cl (LSOCl) phosphors without requiring hazardous reducing atmospheres. By modulating carbon content (Eu : C = 1 : 0–2.4), the Eu2+/Eu3+ ratio is effectively controlled, enabling tunable emission from pink to white and yellow under 365 nm UV excitation. The optimized LSOCl:7%Eu (Eu : C = 1 : 1.9) exhibits broadband emission (390–720 nm) with a high color rendering index (Ra = 85.05), cool white light (5489 K, CIE: 0.33, 0.38), and stable performance under varying currents. Additionally, LSOCl:7%Eu (Eu : C = 1 : 1.4) shows excitation-dependent chromaticity shifts: minimal changes under solar-blind UV (250–280 nm) but dramatic variations at 280–350 nm, facilitating rapid detection. A solar-blind UV detector was designed, demonstrating fast response, high resolution (50% CIE shift at 330 nm), and anti-interference capability. The CARS method offers an eco-friendly, scalable route for dual-emission phosphors, showcasing their dual utility in high-quality white LEDs and sensitive UV detection technologies.
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高影响因子
Water Supply
·
2018
·Vol. 18
·期 6
·2063-2070
·
IF 0.674
Li Ting,Zhang Qian,Li Chaolin,Ai Weidang,Zhang Liangchang
Photon UV irradiation is promising for organic pollutant decomposition, such as disinfection by-products (DBPs). However, due to the photostability and high water solubility, chloroacetic acids (CAAs) decomposition using routine UV photolysis is very slow. The present study employed a high photon flux UV (3.13 × 10 4 μmol m −2 s −1 ) system to investigate its feasibility and suitability for enhancing CAAs (MCAA, DCAA and TCAA) decomposition. The results showed that increasing UV photon flux accelerated the photolysis remarkably. Under the condition of high UV photon flux 3.13 × 10 4 μmol m −2 s −1 , almost complete degradation of 20 mg L −1 MCAA, 20 mg L −1 DCAA, and 20 mg L −1 TCAA in a mixed solution can be achieved within 50, 30 and 25 min, respectively. To the best of our knowledge, efficient photolytic degradation of CAAs in such short time has not been reported. The pseudo-first-order rate constant ( k obs ) steadily increases with the increasing of UV intensity, indicating that the utilization of light energy is efficient. In addition, the variation of pH from 3.2 to 9.0 showed minor effect on CAAs decomposition in this present studied system. The outcome of this study would be helpful for future employment of high photon flux UV systems for those photolytic resistant pollutants' decomposition.
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Qilong Zhang,Yajun Wang,Tursun Abdiryim,Ruxangul Jamal,Feng Xu,Yiming Liu,Jixuan Sun,Guangning Song,Yiwu Zhu
Advancements in wearable electronics have driven demand for flexible, self-powered UV photodetectors, yet the efficient separation and transport of carriers remain critical challenges to realizing their full potential. This study constructs a high-performance flexible self-powered UV detector based on an electrochemically doped Bi-ZnO nanoflowers/PEDOT-CH 2 OH p-n heterojunction, further modified with a Co(IO 3 ) 2 layer. Bi 3+ doping introduces oxygen vacancies to enhance carrier separation, synergizing with the built-in electric field within the heterojunction. The spontaneous polarization of Co(IO 3 ) 2 enhances this electric field, optimizing band alignment and suppressing recombination, while hydroxyl groups in PEDOT-CH 2 OH stabilize the oxygen vacancies. The piezoelectric response of ZnO is not prominent in this device, as its modulating effect is overshadowed by the dominant charge separation mechanism based on doping and interfacial polarization. Through synergistic bandgap engineering, defect control, and interface modification, the optimized device achieves a responsivity of 2.05 mA/W, a specific detection rate of 3.25 × 10 10 Jones, and an ultrafast response time of 54 ms under 365 nm UV illumination. The detector exhibits exceptional flexibility, stability, and selectivity, maintaining high performance through 2500 bending cycles, indicating significant potential for application in flexible, wearable UV sensing.
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高影响因子
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