JOURNAL OF APPLIED POLYMER SCIENCE
·
2013
·Vol. 130
·期 1
·645-653
·
IF 1.395
Wenlong Qin,Gang Wu,Peipei Yin,Hongzheng Chen
RGB tricolor organic pigments were in situ modified by stearyl methacrylate-2-(dimethylamino)ethyl methacrylate-styrene random copolymer [P(SMA-DMA-St)] through solution polymerization. The modified particles were charged in tetrachloroethylene (TCE) with the aid of suitable charge control agent. The structure and electrophoretic property of ink particles were characterized by FTIR, TEM, PALS, et al. P(SMA-DMA-St) modification decreased the particles size and enhanced the suspending stability of the pigments in tetrachloroethylene due to the repulsive forces among the treated pigment particles resulting from the extending polyacrylate chain in the media. Partial crosslinking the P(SMA-DMA-St) on the pigment surface with ethylene glycol dimethacrylate (EGDMA) helped to increase the Zeta potential and electrophoresis mobility of RGB electrophoretic particles. The maximum values of the Zeta potential for red, green, and blue electrophoretic particles reached −36.2, −57.7, and −42.7 mV, respectively. The obtained RGB electrophoretic particles could be applied in the color/white dual-particle electronic ink together with charged TiO 2 to show vivid color and white images under a DC electric field. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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高影响因子
CARBON
·
2025
·
IF 11.6
Junzhu Yang,Junchen Liu,Yi Zhang,Wei Pei,Qi Xia,Sanyang Han,Yuan Lu
Efficient regeneration of the coenzymes NADH and NADPH is crucial for sustaining biocatalytic processes, particularly in driving the biocatalysis reaction. In this study, the photocatalytic properties of alkali-doped graphitic carbon nitrates were explored to achieve efficient NAD(P)H regeneration. g-C 3 N 4 doped with potassium (KOH), sodium (NaOH), and calcium (Ca(OH) 2 ) was synthesized and characterized, showing significant enhancements in light absorption, charge separation, and photogenerated electron transport. Among the synthesized photocatalysts, KOH-doped g-C 3 N 4 (KCN) exhibited the best photocatalytic performance, regenerating 95 % NADH and 92 % NADPH within 30 min. This result compares favorably with those reported in previous studies. Based on this superior performance, K-0.2 was further applied to the in vitro CO 2 reduction to formate as a proof of concept. To clarify the mechanistic insights of the improved photocatalytic performance of KCN, the chemical model of g-C 3 N 4 and KCN was established, and DFT calculations were performed to reveal the electronic structure modifications responsible for the enhanced photocatalytic activity. Furthermore, to expand the light utilization capability of the system, upconversion nanoparticles (UCNPs) were incorporated into the system to utilize near-infrared light (980 nm), which successfully achieved NADH regeneration under near-infrared excitation and extended the light absorption range of the photocatalytic system. Overall, this study demonstrated that alkali-doped g-C 3 N 4 offered a highly efficient platform for NAD(P)H regeneration, and the integration of UCNPs further enriched the coenzyme regeneration scenario, suggesting a promising strategy for advancing sustainable coenzyme regeneration technologies.
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Pengfei Xu,Qianfeng Li,Ye Chen,Changling Yan,Gongke Wang
Perovskite materials exhibit significant potential in optoelectronic devices, biomedical applications, and fluorescent probes. However, their inherent sensitivity poses substantial challenges to practical implementation. In this study, we synthesized strontium-doped perovskite quantum dot (CsPbBr₃:Sr QDs) nanocomposites (CsPbBr₃:Sr QDs/MSNs) via an in-situ crystal growth method and encapsulated them within mesoporous silica nanospheres to mitigate the limitations of CsPbX₃ QDs in aqueous and polar environments. When dispersed in aqueous solutions for over one month, these nanocomposites demonstrated minimal changes in fluorescence characteristics. Under more stringent conditions (acidic, basic, and elevated temperature environments), the novel perovskite-based inorganic/organic hybrid nanocomposites exhibited superior fluorescence stability. By introducing amino functionalization, the CsPbBr₃:Sr QDs/MSNs-NH₂ achieved selective and stable detection of p-nitrophenol (p-NP), a priority pollutant in water. Due to the inner filter effect (IFE) induced fluorescence quenching mechanism, p-NP exhibited high sensitivity and selectivity within the 0–300 μM range, with a detection limit of 0.74 μM. Furthermore, analysis of actual water samples confirmed that this method offers high recovery rates and low relative standard deviations. This work underscores the promising potential of perovskite-based nanocomposites as effective fluorescent probes for water quality analysis.
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DOI
高影响因子
Processes
·
2025
·Vol. 13
·期 10
·3295
·
IF 2.8
Yinzhang Cheng,Xueting Bai,Zhenyu Lu,Ruijue Wang,Wei Wang,Ruizhou Guo,Yudong Xu,Zhipeng Lei
With the rapid development of communication, electronics, medical, and energy industries in modern society, film capacitors have garnered widespread attention and undergone significant growth. However, the low energy density (Ue) resulting from low breakdown strength (Eb) significantly limits the application of thin-film capacitors. In this work, we use a low-cost and effective dip-coating method to apply boron nitride (BN) layers onto the outer layers of poly(vinylidene fluoride-co-hexafluoropropylene)/barium titanate (P(VDF-HFP)/BT) composite films to prepare boron nitride-poly(vinylidene fluoride-co-hexafluoropropylene/barium titanate-boron nitride (BN-P(VDF-HFP)/BT-BN) composite films with a sandwich structure that exhibits extremely highEbandUe. The experimental results show that the sandwich-structured BN-P(VDF-HFP)/BT-BN films containing 7.5 wt% BT nanoparticles obtained 530 MV/mEband 18.12 J/cm3Ue, both of which are much higher than those of the corresponding monolayer films. In addition, the finite element simulation results show that the designed sandwich-structured films can reduce local field strength distortion, decrease leakage current, and suppress the development of breakdown channels, thereby significantly improvingEbandUe. In summary, this study presents a low-cost and effective method for enhancing the breakdown strength and energy density of thin-film capacitors.
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Hongye Li,Jingyu Tan,Song Yang,Yapeng Sun,Huangzhong Yu
Two-dimensional (2D) materials have attracted attention due to their excellent optoelectronic properties, but their applications are limited by their defects and vacancies. Surface modification is an effective method to restore their performance. Here, ZrSe2 is modified with conductive polymer p-toluenesulfonic acid (PTSA). It is found that PTSA can obtain electrons of ZrSe2 through the combination of −SO3H and ZrSe2, thus forming interfacial dipoles, which improve the work function of ZrSe2. In addition, −OH in PTSA can effectively fill the Se vacancy in ZrSe2 to form P-type doping, thereby improving its conductivity. ZrSe2 modified by the PTSA material is first used as a hole transport layer (HTL) in organic solar cells (OSCs). The efficiency of OSCs based on the PBDB-T:ITIC and PM6:L8-BO binary active layer with ZrSe2:PTSA as the novel HTL reaches 10.66 and 18.14%, which are obviously higher than the efficiency of OSCs with pure ZrSe2 as the HTL (8.48 and 15.64%). More interestingly, the stability of the device with ZrSe2:PTSA as HTL is significantly better than that of PEDOT:PSS. This study shows that the modification of the organic material can effectively improve the photoelectric performance of ZrSe2 and explores the physical mechanism of the interaction between the organic modifier and 2D materials.
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PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Feichong Yao,Wenhao Xie,Chao Ma,Dedong Wang,Zeinhom M. El-Bahy,Mohamed H. Helal,Hu Liu,Ai Du,Zhanhu Guo,Hongbo Gu
The polymer nanocomposites with 3-dimensional (3D) nanofillers can form a 3D network and attain a uniform distribution of nanofillers, which benefits the transfer of charge carriers and phonons as well as the dispersion of stress at a very low loading of nanofillers. These polymer nanocomposites with high mechanical properties would have great potential for thermal and electrical conduction as well as electromagnetic interference (EMI) shielding. In this paper, the 3D epoxy nanocomposites are manufactured by stuffing epoxy resin into 3D p -phenylenediamine-aniline copolymer nanofibers@Cu foam (P-PANI@f-Cu) hybrid nanofillers that are constructed by electrophoretic deposition of phosphoric acid doped P-PANI copolymer nanofibers onto the surface of sodium hydroxide oxidized Cu foam. Benefiting from 3D continuous network of P-PANI@f-Cu hybrid nanofillers, the electrical conductivity and thermal conductivity of 3D P-PANI@f-Cu/epoxy nanocomposites with the P-PANI loading of 0.262 wt% could achieve 7.71 ± 0.04 S cm −1 and 5.4670 ± 0.0085 W m −1 K −1 , respectively, which are much better than that of pure epoxy (insulator and 0.2310 ± 0.0017 W m −1 K −1 , respectively) and epoxy composites filled with only Cu foam (4.46 ± 0.03 S cm −1 and 2.7907 ± 0.0057 W m −1 K −1 , respectively). Meanwhile, with a thickness of 1.8 mm, the average total EMI shielding effectiveness (SE T ) of 3D P-PANI@f-Cu/epoxy nanocomposites in the X-band range reaches a high value of 66.14 dB, which is capable of effectively shielding the electromagnetic signal between Bluetooth earphone and smartphone in the practical application. Furthermore, the 3D P-PANI@f-Cu hybrid nanofillers can efficiently prevent the crack growth in the epoxy nanocomposites and improve their mechanical properties including hardness and elastic modulus .
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高影响因子
ChemCatChem
·
2022
·Vol. 14
·期 15
·e202101954
·
IF 5.497
Lulu Bai,Hao Sun,Qiang Wu,Weifeng Yao
Graphical Photocatalytic H 2 O 2 evolution : A new P-doped carbon nitride loaded with ruthenium single atoms and clusters was successfully synthesized by photoreduction method. It has exhibited an excellent photocatalytic activity toward H 2 O 2 evolution. This study surmounts people‘s understanding that precious metal loading is not conducive to H 2 O 2 selectivity and provides ideas for the design of extremely active and stable single-atom and clusters. Photocatalytic H 2 O 2 evolution via two-electron oxygen reduction is a promising path for renewable and on-the-spot H 2 O 2 production compared with the traditional anthraquinone method. However, the efficiency of photocatalytic production of H 2 O 2 is usually very low. Herein, P-doped carbon nitride loaded with ruthenium single atoms and clusters (Ru atom /P-CN) is reported as an efficient photocatalyst for H 2 O 2 production. The yield of H 2 O 2 over Ru atom /P-CN (385.8 mmol g −1 h −1 ) is about 4.3 times higher than that of P-CN (88.9 mmol g −1 h −1 ) and 3.6 times higher than that of ruthenium nanoparticles loaded P-CN (105.9 mmol g −1 h −1 ). Further mechanistic study indicates that the presence of Ru in the form of single atoms and clusters not only improves the separation efficiency of photogenerated carriers and inhibits the recombination of photogenerated electron-hole pairs, but also increases the reactive sites of this catalytic system. This study breaks through people‘s understanding that precious metal loading is not conducive to H 2 O 2 selectivity and provides a new way to prepare low-metal loading, high-activity photocatalysts for H 2 O 2 production.
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高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 12
·7553-7567
·
IF 3.917
Liu Mingsheng,Huang Shuo,Zhang Guangxian,Zhang Fengxiu
Abstract A durable and effective flame retardant (FR) was synthesized in this work by taking advantage of the high reactivity of a cyclodiphosphazane derivative, without the use of formaldehyde. The FR is halogen-free and has the synergistic effect of phosphorus, nitrogen and silicon. Fire resistance of the cotton fabrics is significantly enhanced after the FR treatment. The limiting oxygen indices of cotton treated with 30% FR increase from 18.2 to 52.9% and decrease to 27.2% after 50 launder cycles, demonstrating that the proposed material is a durable FR. The thermo-gravimetric analysis results indicate that compared with the control cotton, the degradation process of the treated cotton occurred at a lower temperature range, the degree of degradation was lower, and the residue is improved. The total heat release and the effective heat combustion values are notably lower for the treated cotton than the control cotton. Furthermore, mechanical property tests demonstrate that the tensile strength is largely retained, while the bending length of the treated cotton partly increases. The surface morphology of the treated cotton is investigated with scanning electron microscopy. Fourier transform infrared and elemental analysis show that the FR was successfully grafted onto the surface of the cotton fabric. 1 H, 13 C, and 31 P nuclear magnetic resonance verify the chemical structure of the FR.
Graphic abstract
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Tianyue Su,Junsheng Wang,Chun Cai
The nickel phosphides have garnered increasing attention as an excellent catalytic site in the fields of electrocatalysis and hydrotreating, but their application in organic synthesis remains infrequent. In this study, ammonium phosphate and nickel chloride were employed as the doping sources for the first time to synthesize the Ni-based ZIF-8 precursor via the host–guest method. Subsequently, the precursor was pyrolyzed to obtain Ni2P nanoparticles (NPs) supported on N, P co-doped carbon. The composite materials exhibit elevated metal loading and effective dispersion due to the synergistic combination of phosphorus and nickel. Specifically, compared with Ni-NC, the optimal Ni2P-NCP-1 exhibits enhanced catalytic activity in the α-alkylation of arylacetonitriles with alcohols using KOH as the base. It shows a wide broad substrate scope at 140 °C for 12 h in n-octane using a hydrogen borrowing strategy. Through characterizations and mechanistic studies, it has been discovered that the introduction of P source not only provides more basic sites on carbon matrix but also leads to the formation of Ni2P NPs, which facilitates the catalytic efficiency by modifying the electronic structure of Ni. Compared with the metallic Ni species, the synergistic effect between Ni2P and acid-basic sites significantly influences the dehydrogenation of alcohols to generate Ni–H species. This study successfully achieves simultaneous phosphating of both the metal and support, and it also demonstrates that the N2P-NCP-1 catalyst has significant potential in the heterogeneous organic transformation field.
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高影响因子
CHEMISTRY OF MATERIALS
·
2020
·
IF 9.567
Huanhuan Jia,Xinmiao Liang,Tao An,Linfeng Peng,Jiwen Feng,Jia Xie
Finding sodium solid electrolytes (SSEs) with good performance is key to building all-solid-state sodium batteries. In the development of solid electrolytes, halogen doping has been shown to be an effective approach. However, it has rarely been applied to chalcogenide-based SSEs, possibly because of strict structure constraints. In this work, the strategy of halogen doping is successfully demonstrated on Na3.67[Sn0.67Si0.33]0.67P0.33S4, a novel SSE with high structural tolerance. The halogen-doped samples formulated as Na3.57[Sn0.67Si0.33]0.67P0.33S3.9X0.1 (X = Cl, Br, and I) exhibit higher ionic conductivities and lower activation energies than the pristine sample. Na3.57[Sn0.67Si0.33]0.67P0.33S3.9I0.1, the I-doped sample, has the highest ambient ionic conductivity of 1.08 mS cm–1 and the lowest activation energy of 0.24 eV. Structure analysis indicates that the high electronegativity of Cl atoms plays an important role in improving the conduction of Na+ ions in Cl-doped samples. The large atomic radius and high polarizability of I are more important factors to accelerate the transportation of Na+ ions in the I-doped counterpart. Furthermore, the all-solid-state sodium batteries assembled with Na3.57[Sn0.67Si0.33]0.67P0.33S3.9I0.1 as solid electrolytes show decent cyclic stability at 30 °C with a current density of 0.15 A g–1. This work systematically manifests the effect of halogen doping in SSEs, providing a versatile method to develop novel SSEs.
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高影响因子
Journal of Cleaner Production
·
2021
·
IF 9.297
Chuankun Yin,Siji Zhou,Keyi Zhang,Jiale Bai,Yangyang Lv,Xuewen Zhang,Xiaoxia Li,Aihua Xu
p-Nitrophenol (PNP) is one of the highly toxic and mutagenic pollutants existed in aquatic environment. In this work, the crednerite CuMnO 2 nanoflake was prepared and used to degrade PNP with peroxymonosulfate (PMS) as the oxidant. It was found that CuMnO 2 exhibited much higher activity than other Cu-based catalysts such as CuO, Cu 2 O, CuFe 2 O 4 and CuFeO 2 , with 90% of PNP degraded after 10 min under mild reaction conditions. The catalyst was also stable during five successive runs. Sulfate and hydroxyl radicals produced from PMS reduction by Cu(I) species, as well as superoxide ions and single oxygen, contribute to the degradation of PNP. More importantly, the interactions between Mn and Cu species in CuMnO 2 were identified by X-ray photoelectron spectroscopy (XPS), fourier transform infrared spectroscopy (FT-IR) and linear sweep voltammetry (LSV), and were further confirmed by the control experiment with the mixture of Cu 2 O + Mn 2 O 3 . The results implied that the high valent Mn(III) species acted as Lewis acids to withdraw electron from PMS, resulting that the Cu(I) species can be easier oxidized to Cu(II) by PMS with the formation of radicals. These findings provide an ideal bimetallic heterogeneous catalyst and a new mechanism for PMS-mediated reaction.
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高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Zhi Li,Qingxiang Zhou,Shuangying Li,Menghua Liu,Yanhui Li,Chunmao Chen
In this study, a label-free “turn off” fluorescent sensor has been resoundingly fabricated using carbon dots (CDs) for ultrasensitive detection of copper ions (Cu 2+ ). CDs are prepared by solid phase carbonization method using p-toluidine and l -cysteine as the precursors. The synthesized CDs exhibited the highest fluorescence intensity with excitation and emission wavelengths set at 300 nm and 400 nm, respectively. The CDs were selective and sensitive to Cu 2+ due to the static quenching mechanism. The concentration of CDs, and solution pH and incubation time were important parameters for the developed sensor. The experimental results showed that 20 mgL −1 was enough for the analysis. As the solution pH was concerned, it was apparent that the sensor was endowed with an excellent response signal to Cu 2+ and provided high sensitivity at pH 12. The interaction occurred very quickly, and the incubation time could be set at 1 min. The sensor provided a two-stage calibration curve to Cu 2+ in the range of 0.05–0.7 and 0.7–4 μM with a limit of detection of 47 nM. The obtained results clearly demonstrated that this facile method was fast, reliable and selective for detecting Cu 2+ , which would explore a prospective strategy for developing effective and low-cost sensors for monitoring metal ions in aqueous environments.
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高影响因子
危险品化学品经营许可证（带存储）