SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2020
·
IF 3.232
Xiaoye Wen,Li Yan,Zhefeng Fan
New strategies still need to be proposed that can be used to sense and remove toxic environmental pollutants in a sensing system. In this research, a novel NIR fluorescence sensor 1 was designed and prepared with aggregation induced emission (AIE) property. The fluorescence intensity of the sensor 1 in DMSO/H 2 O mixed solvent was changed along with the proportion of water. The sensor 1 can be successfully used for real-time detection and removal of Hg 2+ in 20% DMSO aqueous solution with high selectivity, quick response and so on. Furthermore it can be efficiently reused and recycled without any loss through Na 2 S. In addition, the sensor 1 displayed high sensitivity and selectivity to cyanide ions in 1% DMSO aqueous solution with the presence of other interference anions. The sensing mechanism for Hg 2+ and cyanide ion was evaluated by 1 H NMR spectra, Mass spectrometry. The sensor 1 exhibited low cytotoxicity for biological applications, which was used as an outstanding fluorescent transducer for detection of cyanide ion in living cells. Based on the visible fluorescence change for the sensor 1 to cyanide ion, the measurement was performed for food materials containing cyanide, such as potato, cassava powder and almond. This research provides perspective potential in solving the problem of other pollution and stimulating new thinking for designing of the novel fluorescence materials.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Guofu Ma,Jiajia Li,Kanjun Sun,Hui Peng,Jingjing Mu,Ziqiang Lei
A gel polymer PVA–KOH–K 3 [Fe(CN) 6 ] is prepared by potassium hydroxide and potassium ferricyanide doped polyvinyl alcohol, and a solid-state supercapacitor is assembled using the gel polymer as electrolyte and separator, activated carbons as electrode. The gel polymer exhibits flexible, high ionic conductivity and wide potential properties. The electrochemical properties of the supercapacitor are investigated using cyclic voltammetry , galvanostatic charge/discharge, and impedance spectroscopy techniques. The electrode specific capacitance of the supercapacitor can be as high as 430.95 F g −1 , and after 1000 cycles at a current density of 1 A g −1 it still remains higher than 380 F g −1 . The energy density and power density of the supercapacitor reach 57.94 Wh kg −1 and 59.84 kW kg −1 , respectively. These novel flexible gel polymers are desirable for applications in supercapacitor devices.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2023
·
IF 5.8
Xi Lan,Junchen Zhuo,Linpin Luo,Hao Sun,Yanmin Liang,Jianxing Feng,Rui Shu,Yuechun Li,Tianyu Wang,WenTao Zhang,Jianlong Wang
A tannate-iron network-derived peroxidase-like catalyst loaded with Fe ions on carbon nitride (C 3 N 4 ) was reported for detection of total antioxidant capacity (TAC) in food in this study. Metal-phenolic networks (MPNs) was employed to form a low coordination compound on C 3 N 4 , and calcined catalyst formed hollow structure with abundant and uniform Fe sites and surface folds. CN-FeC exhibited significant peroxidase-like activity and high substrate affinity. The homogeneous distribution of amorphous Fe elements on the C 3 N 4 substrate provides more active sites, resulting in provided excellent catalytic activity to activate H 2 O 2 to 1 O 2 and O 2 ·– . The established CN-FeC/TMB/H 2 O 2 colorimetric system can detect AA in the concentration range of 5-40 μM, with the detection limits of 1.40 μM, respectively. It has good accuracy for the detection of vitamin C tablets, beverages. Taken together, this work shows that metal-phenolic networks can be an effective way to achieve efficient utilization of metal atoms and provides a promising idea for metal-phenolic networks in nanoparticle enzyme performance enhancement.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2023
·Vol. 15
·期 13
·1639-1648
·
IF 3.1
Jiali Kou,Zhiyuan Meng,Xiaoyuan Wang,Zhonglong Wang,Yiqin Yang
In this work, a novel coumarin derivative-modified cellulose acetate (DCB-CA) was synthesized as a fluorescent probe for highly selective and sensitive determination of CN− in food samples. The DCB-CA was synthesized by using CA as a skeleton, and the coumarin derivative as the fluorophore. The DCB-CA obtained was characterized by different methods including FTIR, SEM, 1H-NMR, TGA and UV-vis spectroscopy. The DCB-CA exhibited a significant “turn-off” fluorescence response to CN−, accompanied by a distinct fluorescence color change from bright yellow to colorless. The detection limit of CN− using DCB-CA was calculated to be 5.8 × 10−7 M, which was much lower than the threshold limit of CN− recommended by the World Health Organization (1.9 × 10−6 M). Because of the favorable solubility and processability of the CA, the DCB-CA was easily processed into different fluorescent materials including fluorescent films and coatings. The fluorescent film obtained was also applied to the selective detection of CN−. Furthermore, the DCB-CA was successfully applied to determine CN− in food samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Shuo Li,Nan Yao,Lulu Fan,Zhengjia Li,Linyan Yang,Jie Cen,Xiaonian Li
How to break the activity-selectivity dependence in halonitrobenzene hydrogenation remains a challenge. In this work, Ni@C N/SiO 2 were synthesized and examined in the hydrogenation of p -chloronitrobenzene. It showed that the electron transferred from nitrogen doped carbon shell to Ni 0 core (core–shell synergistic effect) dominated the intrinsic activities of Ni@C N/SiO 2 with dual-reaction surfaces (H 2 dissociated on Ni 0 core, while p -chloronitrobenzene was hydrogenated on carbon shell) in the thiophene-free hydrogenation, leading to their higher turnover frequencies than Raney Ni catalyst. During the thiophene-involved hydrogenation, the adsorption of thiophene on Ni 0 changed its electron density and blocked the active sites. These enhanced the selectivity, but significantly reduced the activity for Raney Ni catalyst. Comparatively, the carbon shell protected Ni 0 core from thiophene adsorption so that the hydrogen dissociated on Ni 0 as usual. However, the adsorption of thiophene on the carbon shell reduced the available sites for p -chloronitrobenzene adsorption. Although Ni@C N/SiO 2 had lower activities in the thiophene-involved reactions than those of thiophene-free reactions, they achieved ∼100 % p-chloroaniline selectivities and 8-fold higher turnover frequencies than Raney Ni, breaking the activity-selectivity dependence. This reveals that the available sites on the carbon shell and the core–shell synergistic effect determine the thiophene-involved hydrogenation activities of Ni@C N/SiO 2 catalysts.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2022
·Vol. 40
·期 11
·1441-1450
·
IF 3.815
Tong Li-Fen,He Liang,Zhan Chen-Hao,Xia Yun-Qing,Liu Xiao-Bo
High-quality film capacitors are widely used in many fields such as new energy vehicles, electronic communications, etc., due to their advantages in wide frequency response and low dielectric loss. The dielectric film is a crucial part of the film capacitor, and its properties have an important impact on the performance and use conditions of the film capacitor. In this work, a novel high-temperature-resistant dielectric film was prepared. Firstly, the Bi 2 S 3 /rGO-CN fillers were prepared by hydrothermal method combined with cyanation treatment, and then added to the poly(arylene ether nitrile) (PEN) matrix to prepare the dielectric film materials (PEN/Bi 2 S 3 /rGO-CN). After high temperature treatment, the fillers Bi 2 S 3 /rGO-CN reacted with the PEN matrix, and the composites materials transformed into a thermosetting hybrid film (PEN-Bi 2 S 3 /rGO) with gel content of 97.88%. The prepared hybrid dielectric films did not decompose significantly before 400 °C, and showed a glass transition temperature ( T g ) of up to 252.4 °C, which could increase the effective use temperature of the materials. Compared with the composite films without heat treatment, they exhibit better mechanical properties, with further improvement in tensile strength and elastic modulus, and a decrease in elongation at break. The dielectric constant of the hybrid films can be up to 6.8 while the dielectric loss is only about 0.02 at 1 kHz. Moreover, the hybrid films showed excellent dielectric stability during temperature changes, and remain relatively stable before 250 °C, which is suitable as a high-temperature-resistant high-dielectric material and is more advantageous for practical applications.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Yanyan Zhao,Yongbo Wang,Xuhua Liang,Huanxian Shi,Cunjin Wang,Jun Fan,Xiaoyun Hu,Enzhou Liu
A visible-light-induced antibiotics degradation system based on a nano-Ag, CsPbBr 3 quantum dot (QDs) and bulk g-C 3 N 4 (CN) ternary assembly (Ag-CsPbBr 3 /CN) has been firstly constructed under an organic phase environment, oleylamine (OLA) and oleic acid (OA) were used as surfactants to stabilize the CsPbBr 3 , l -cysteine was used to facilitate the interaction between nano-Ag, CsPbBr 3 and CN. The new ternary assembly of Ag-CsPbBr 3 /CN composite was used to degrade 7-aminocephalosporanic acid (7-ACA) under visible light irradiation, and the 7%-Ag-CsPbBr 3 /CN composite displayed the superior photocatalytic activity, approximately 92.79% of 7-ACA has been degraded to CO 2 , H 2 O and other small molecules at 140 min, which was approximately 1.49-folds, 1.56-folds, 3.01-folds and 11.43-folds higher than 9%-CsPbBr 3 /CN, 7%-Ag/CN, pure CN and pure CsPbBr 3 , respectively. A possible mechanism for 7-ACA degradation over Ag-CsPbBr 3 /CN composite were proposed according to detailed measurements of adsorption test, Brunauer-Emmett-Teller (BET) measurement, UV–vis diffuse reflectance spectra (DRS), photoluminescence spectra (PL), transient photocurrent response and electrochemical impedance spectroscopy (EIS) measurement, and the enhanced photocatalytic activity of Ag-CsPbBr 3 /CN composite could be attributed to the excellent adsorbability, the enhanced light-harvesting and reduced charge recombination, as well as the synergistic effects of nano-Ag and CsPbBr 3 co-loaded with CN. In addition, Holes (h + ) and hydroxyl radicals ( OH) played major roles, electronic (e − ) and superoxide radical ( O 2 -) played minor roles based on the reactive-species-trapping experiments, the NBT transformation and the 7-hydroxycoumarin fluorescent experiments. Furthermore, a possible 7-ACA degradation pathway was investigated based on the Liquid Chromatography-Mass spectroscopy (LC-MS) experiment to better understand the degradation process. The present opens up a new insight for using CsPbBr 3 as photocatalyst to degrade antibiotics.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Jingying Duan,Guohui Qin,Luofu Min,Yuchen Yang,Chengyang Wang
The photochemistry and sodium storage process have been generally considered as two separated approaches without strong connection. Here, ultraviolet (UV) irradiation was applied to sodium-ion batteries to improve the electrochemical performance of MoS2-based composites. C@MoS2@CN nanospheres consist of double protective structures, including inner hollow carbon spheres with a thin wall (C) and outer N-doping carbon nanosheets (CNs) derived from polydopamine. The special nanostructure possesses the virtues such as wide-interlayer spacing, flexible feature with great structure integrity, and rich active sites, which endow the fast electron transfer and shorten the ion diffusion pathways. Under the excitation of UV-light, intense electrons and holes are accumulated within MoS2-based composites. The excited electrons can promote the preinsertion of Na+. More importantly, dense electrons promote the electrolyte to decompose and hence form a stable solid electrolyte interphase in advance. After UV-light irradiation treatment in the electrolyte, the initial Coulombic efficiency of C@MoS2@CN electrodes increased from 48.2 to 79.6%, and benefiting from the fine nanostructure, the C@MoS2@CN electrode with UV irradiation treatment delivered a great rate performance 116 mAh g–1 in 20 s and super cycling stability that 87.6% capacity was retained after 500 cycles at 500 mA g–1. When employed as anode for sodium-ion hybrid capacitors, it delivered a maximum power density of 6.84 kW kg–1 (with 114.07 Wh kg−1 energy density) and a maximum energy density of 244.15 Wh g–1 (with 152.59 W kg–1 power density). This work sheds new viewpoints into the applications of photochemistry in the development of energy storage devices.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2018
·
IF 4.7
Qian Peng,J. Timothy Sage,Yulong Liu,Zijian Wang,Michael Y. Hu,Jiyong Zhao,E. Ercan Alp,W. Robert Scheidt,Jianfeng Li
Compared to well studied diatomic ligands (NO, CN–, CO), the axial bonds of carbene hemes is much less known although its significance in biological chemistry. The unusually large quadrupole splitting (ΔEQ = +2.2 mm·s–1) and asymmetric parameter (η = 0.9) of the five-coordinate heme carbene [Fe(TTP)(CCl2)], which is the largest among all known low spin ferrohemes, has driven investigations by means of Mössbauer effect Nuclear Resonance Vibrational Spectroscopy (NRVS). Three distinct measurements on one single crystal (two in-plane and one out-of-plane) have demonstrated comprehensive vibrational structures including stretch (429) and bending modes (472 cm–1) of the axial Fe–CCl2, and revealed iron vibrational anisotropy in three orthogonal directions for the first time. Frontier orbital analysis especially comparisons with diatomic analogues (NO, CN–, CO) suggest that CCl2, similar to NO, has led to strong but anisotropic π bonding in a ligand-based “4C”-coordinate which induced the vibrational anisotropies and very large Mössbauer parameters. This is contrasted to CN– and CO complexes which possess a porphyrin-based “4N”-coordinate electronic and vibrational structures due to inherent on-axis linear ligation.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shizong Wang,Jianlong Wang
This study firstly reported the regulation of PMS activation pathway via the novel catalyst (CQDs/Co@CN) that contained carbon quantum dots (CQDs) and confined nano Co dual active sites. CQDs/Co@CN showed superior catalytic activity for PMS activation due to the synergistic effect of CQDs and confined nano Co, and sulfamethoxazole degradation rate reached 0.661 min −1 , which was even higher than that obtained by single atom catalyst. The reactive species in the system of CQDs/Co@CN/PMS could be easily regulated by the visible light. In the absence of visible light, PMS was mainly activated to produce Co(IV) = O, while it was activated to simultaneously produce radicals and Co(IV) = O in the presence of visible light. Moreover, the yields of Co(IV) = O increased by about 10 %. Experimental results and DFT calculation demonstrated that CQDs played crucial role in the regulation of reactive species. This study could provide a way to modulate the reactive species by visible light.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Sheng-Jin He,Jia-Pei Chen,Wei-Ming Guo,Xiu-Bing Chen,Huan Zhou,Chuang-Tian Zhan,Shi-Kuan Sun,Yun Li,Li-Xiang Wu,Jia-Xiang Xue,Hua-Tay Lin
In this study, CaO–Al 2 O 3 –MgO–SiO 2 glass was utilized to join SiC after surface polishing and etching, without the application of pressure. To join polished SiC at 1250 °C using CaO–Al 2 O 3 –MgO–SiO 2 glass proved unsuccessful. However, when polished SiC was joined at 1350 °C, the joint shear strength was 108.0 ± 15.5 MPa. Etching polished SiC with a NaOH–K 3 [Fe(CN) 6 ] solution effectively removed surface carbon, resulting in numerous micro-pits, that increased the joining area and improved the wettability of CaO–Al 2 O 3 –MgO–SiO 2 glass. The joint strengths of etched SiC joined at 1250 °C and 1350 °C were 29.0 ± 11.6 MPa and 125.1 ± 19.6 MPa, respectively. After ablation at 1200 °C for 10 min, the retained strength of the etched joints (joined at 1350 °C) was 61.9 ± 4.0 MPa, whereas the strength of the polished joints decreased to only 36.6 ± 10.7 MPa. Surface etching demonstrates the potential to significantly enhance the strength and high-temperature resistance of SiC joints.
研究领域:
材料科学
·
陶瓷工程
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Ming-Xuan Liu,Yu-Ting Cai,Ruo-Jia Wang,Peng-Fei Zhu,Yan-Chao Liu,Hao Sun,Yong Ling,Wei-Zhong Zhu,Jing Chen,Xiao-Ling Zhang
Hypoxia can lead to liver fibrosis and severely limits the efficacy of photodynamic therapy (PDT). Herein, carbon nitride (CN)-based hybrid nanoparticles (NPs) VPSGCNs@TSI for light-driven water splitting were utilized to solve this problem. CNs were doped with selenide glucose (Se-glu) to enhance their red/NIR region absorption. Then, vitamin A-poly(ethylene glycol) (VA-PEG) fragments and aggregation-induced emission (AIE) photosensitizers TSI were introduced into Se-glu-doped CN NPs (VPSGCNs) to construct VPSGCNs@TSI NPs. The introduction of VA-PEG fragments enhanced the targeting of the NPs to activated hepatic stellate cells (HSCs) and reduced their toxicity to ordinary liver cells. VPSGCN units could trigger water splitting to generate O2 under 660 nm laser irradiation, improve the hypoxic environment of the fibrosis site, downregulate HIF-1α expression, and activate HSC ferroptosis via the HIF-1α/SLC7A11 pathway. In addition, generated O2 could also increase the reactive oxygen species (ROS) production of TSI units in a hypoxic environment, thereby completely reversing hypoxia-triggered PDT resistance to enhance the PDT effect. The combination of water-splitting materials and photodynamic materials showed a 1 + 1 > 2 effect in increasing oxygen levels in liver fibrosis, promoting ferroptosis of activated HSCs and reversing PDT resistance caused by hypoxia.
研究领域:
材料科学
·
生物医学工程
·
治疗学
·
纳米技术
·
分子生物学
✓ 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）