Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 10
·3634-3643
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IF 6.4
Jundang Liang,Botian Li,Xiaodong Gai,Ning Li,Jian Wang,Yichi Zhang,Qiong Zhou,Yuchao Sun
The excessive use of paper causes serious resource consumption and environmental pollution. Environmentally friendly light printing based on a photochromic system with the advantages of being noncontact, rapid, and inkless has attracted increasing attention; however, several problems need to be addressed, such as slow discoloration and irreversibility. In this work, a composite of MoO3−x inorganic nanorods and the conductive polymer poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) was employed as a color-changing electrode, and a photochromic/electrochromic strain sensor (PESS) was obtained by assembling the color-changing electrode with an organohydrogel electrolyte and a flexible indium tin oxide (ITO) film. Due to the photochromic/electrochromic effect of MoO3−x and the conductivity of PEDOT:PSS, the sensor turned cyan-blue under UV irradiation or a negative bias voltage, and it could be rapidly bleached by applying a positive bias voltage. The photochromic/electrochromic behavior of the PESS could be optimized by tuning the amount of PEDOT:PSS, and the device could perform cyclic light printing/electroerasing with a fast and stable response. Moreover, the flexible strain sensor could be utilized to monitor mechanical strain by translating a series of deformations into electrical signals. The properties of photochromism/electrochromism and strain sensing make the device potentially applicable to outdoor wearable devices capable of light-based printing.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
·
IF 22.1
Shanliang Jiang,Changhao Li,Yaseen Muhammad,Ying Tang,Ruimeng Wang,Junjie Li,Jing Li,Zhongxing Zhao,Zhenxia Zhao
Construction of highly-active photothermal catalysts featuring merits of high quantum efficiency and superior heat resistance is a great challenge during volatile organic compounds (VOCs) degradation under high humidity. Herein, a facile solvent-induced dimensionality reduction strategy was proposed to engineer a nanosheeted and polycrystalline Cu/Mn-based catalyst (M-Cu/MnO x ) having interfacial oxygen vacancies for enhanced photo-thermal catalytic degradation of toluene under highly humid conditions. Unique Cu-mediated δ-MnO 2 /Mn 3 O 4 nanosheets with high surface area exhibited excellent light absorptivity and photogenerated carrier separation efficiency, as well as superior light-driven thermogenesis. It realized ultra-high (92.8%) toluene conversion and deep mineralization (84.4%) under RH = 80% and continuous catalytic reaction (200 h). Its toluene degradation rate exhibited 3.5–71.9 times higher than reported state-of-the-art photothermal catalysts. The newly designed M-Cu/MnO x catalyst provides a promising, low-cost and alternative for the efficient degradation of toluene and other similar VOCs under humid conditions on large-scale operations.
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International Journal of Nanomedicine
·
2023
·
IF 8
Huiquan Yang,Wenbin Chen,Jun Ma,Jing Zhao,Dongdong Li,Yuyu Cao,Peidang Liu
Background The synergistic effect of nanomaterials and chemotherapeutics provides a novel strategy for the treatment of tumors. Silver nanotriangles (AgNTs) exhibited some unique properties in nanomedicine. Studies on the synergy of silver-based nanomaterials and anti-tumor drugs against gliomas are rare.Materials and Methods Chitosan-coated AgNTs were prepared, followed by characterization using transmission electron microscopy, ultraviolet-visible spectroscopy and X-ray diffraction. The anti-glioma effect of cyclophosphamide (CTX), 5-fluorouracil (5-FU), oxaliplatin (OXA), doxorubicin (DOX) or gemcitabine (GEM) combined with AgNTs in different glioma cell lines (U87, U251 and C6) was assessed by the MTT assay to screen out a drug with the most broad-spectrum and strongest synergistic anti-glioma activity. The intracellular reactive oxygen species (ROS) level, mitochondrial membrane potential (MMP) and cell apoptosis were detected by flow cytometry. The possible underlying mechanisms of the synergy were further investigated with ROS scavenger and specific inhibitors of C-jun N-terminal kinase (JNK), p38 and extracellular signal-regulated kinase 1/2 pathways.Results The synthesized AgNTs were mainly triangular and truncated triangular with an average edge length of 125 nm. A synergistic anti-glioma effect of AgNTs combined with CTX was not observed, and the synergism between AgNTs and 5-FU was cell type-specific. AgNTs combined with OXA, DOX or GEM displayed synergistic effects in various glioma cell lines, and the combination of AgNTs and GEM showed the strongest synergistic activity. A decrease in cell viability, loss of the MMP and an increase in apoptosis rate induced by this synergy could be significantly attenuated by the ROS scavenger N-acetylcysteine and JNK inhibitor SP600125.Conclusion Our results suggested that the combination of AgNTs and GEM possessed broad-spectrum and potent synergistic anti-glioma activity, resulting from cell apoptosis mediated by a ROS-dependent mitochondrial pathway in which JNK might be involved.
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INTERNATIONAL JOURNAL OF FOOD PROPERTIES
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2022
·
IF 3.388
Zhihua Liu,Yezi Yang,Chongzhi Sun,Yang Wu,Xiaobo Li
Mei (Prunus mume) is widely planted in Eastern Asian countries. To evaluate the effect of cultivar and producing origin on the quality of Mei fruit, we studied the phytochemical properties and antioxidant activities of the 16 Mei fruit cultivars from 6 provinces in China, as well as their profiles of 121 volatile compounds, 5 organic acids, 13 minerals, 24 amino acids and 3 active peptides. Multivariate analysis revealed that the four Mei fruit cultivars with a drier climate in Yunnan province had the characteristics of low water moistures and proteins contents, high total acids, soluble solids, flavones, and phenols contents, and high antioxidant activities, which could be distinguished from fruits of other producing areas. Further component analysis showed that Mei fruits were rich in volatile compounds, organic acids (such as citric acid and malic acid), minerals (such as K, Ca, Mg, P, and Fe), and amino acids (such as Orn, Asn, and Asp), and the nutrient composition ratio in different cultivars was different. In conclusion, Mei fruits can be used as nutritious health food and different cultivars focus on different nutritional compositions.
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BIORESOURCE TECHNOLOGY
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2022
·
IF 11.889
Cong-Jia Duan,Xu Han,Yuan-Hang Chang,Jian Xu,Gan-Lu Yue,Ying Zhang,Yu-Jie Fu
A novel ternary deep eutectic solvent (DES), consisted of choline chloride, oxalic acid and ethylene glycol, was developed as a green, low-cost and recyclable pretreatment system for multi-stage utilization of Eucommia ulmoides seed shells. Under optimum conditions, 79.7 % hemicellulose and 65.6 % lignin were quickly removed while 84.0 % cellulose was retained. After DES pretreatment , the yield and purity of gutta-percha achieved 85.1 mg/g and 96.2 %, which increased 1.4 and 1.8 folds higher than that of un-treatment ones. Meanwhile, 69.1 % enzymatic digestibility of cellulose was obtained, that was 2.3 folds higher than that of raw substrates. Moreover, 53.6 % low-condensation lignin with aromatic structures and valuable aryl-ether linkages was well collected. Importantly, the DES that has been recycled five runs can still remove 73.9 % hemicellulose and 58.0 % lignin. Overall, the DES was determined to efficiently promote the separation and conversion of high-quality gutta-percha, value-added lignin and high-yield glucose from Eucommia ulmoides seed shells.
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CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
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2022
·
IF 1.193
Jin-Ling PU,Pei-Hong TONG,Yong-Juan MENG,Jian-Ping LI
A bilayer-structured ZIF-8 composite with dual functions of sensing and recognition was synthesized, with ZIF-8 serving as an electrochemiluminescence (ECL) probe carrier and molecularly imprinted membrane to construct a molecularly imprinted electrochemiluminescence sensor. The inner layer was a ZIF-8 layer loaded with a luminescent probe, which was obtained by the reaction of zinc ions with 2-methylimidazole on the magnetic Au@CoFe 2 O 4 surface in the presence of Ru(bpy) 3 2+ , the composite magnetic particle is marked as ZIF(Ru)/Au@CoFe 2 O 4 . The outer layer was a layer with recognition function using ZIF-8 as an imprinted membrane, which was obtained by a layer-by-layer self-assembly method on the surface of ZIF(Ru)/Au@CoFe 2 O 4 with dopamine (DA) as a template molecule, which was marked as ZIF(MIP)/ZIF(Ru)/Au@CoFe 2 O 4 . After eluting the template molecules, the composite particle was immobilized on the surface of a magnetically controlled glassy carbon electrode (MGCE) to obtain a molecular imprinting (MIP) modified electrode. When dopamine molecules were re-adsorbed by the MIP, a charge/energy transfer between dopamine and Ru(bpy) 3 2+ occurred. It subsequently led to the quenching of electrochemiluminescence, which was used as the basis for the detection of dopamine by a molecularly imprinted electrochemiluminescence sensor. When the dopamine concentration was in the range of 1.0 × 10 −14 –5.0 × 10 −10 mol/L, the ECL intensity change of the sensor and the dopamine concentration had a good linear relationship, and the detection limit was 4.8 × 10 −15 mol/L. The molecularly imprinted electrochemiluminescence sensor was successfully applied to the detection of dopamine in human serum samples.
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POLYMER COMPOSITES
·
2019
·Vol. 40
·期 11
·4248-4256
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IF 2.268
Shuai Zhao,Jian Cui,Guangfa Zhang,Ailin Gao,Yehai Yan
Phenolic resin (PR) grafted graphene (G-PR), synthesized from the versatile graphene modification platform 2-(3, 4-dihydroxyphenyl) pyrrolidine grafted pristine graphene (G-OH), is used to develop high-performance phenolic composites. Benefiting from good properties of G-PR, uniform dispersion of G-PR and strong PR/G-PR interfacial interaction, G-PR shows obvious advantages as a filler in improving mechanical, electrical, and thermal properties of PR over pristine graphene (pG) and graphene oxide (GO) derivatives. For PR/G-PR composites, the maximum tensile strength attains 51.4 MPa at 0.5 wt% graphene content. Electrical and thermal conductivities reach to 10 −3 S·cm −1 and 0.374 W·m −1 ·k −1 at 5 wt% graphene content, respectively. The decomposition temperature and residue at 800°C separately increase by 61°C and 3.5 wt% at 1 wt% graphene content. In a word, this contribution provides an alternative avenue for preparing high-performance and multifunctional PR/graphene composites, avoiding the high risk and serious pollution of graphene oxide (GO) avenue.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2019
·
IF 2.931
Pei Yang,Ziqi Zhu,Minzhi Chen,Xiaoyan Zhou,Weimin Chen
A facile and straightforward microwave-assisted method was used to prepare polyamine-functionalized carbon dots (CDs) from a precursor comprising renewable xylan and branched polyethyleneimine (BPEI). The as-prepared BPEI-CDs were monodispersed sphere particles with an average diameter of about 8.62 nm, and exhibited excellent fluorescent property and high stability, as well as excitation-independent emission behavior. Furthermore, it is attractive that the BPEI-CDs can be used as novel fluorescent probes for detecting tannic acid (TA) sensitively and selectively. At the optimum condition, the TA detection system was established in water solution and ethanol solution with a dynamic range from 0.1 to 5 μM, and their detection limit of 36.8 nM and 44.9 nM were also determined, respectively. Most importantly, the BPEI-CDs-based sensors can be successfully applied to detect TA in real lake water and white wine samples, suggesting the low-cost and excellent BPEI-CDs are potential suitable for TA detection in practical application.
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JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
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2018
·
IF 3.046
Jing Wang,Xinyue Hu,Yuexing Li,Huimin Wen,Zhili Zuo,W.A. Muhammad,John Q. Xiao,Jun Hu
Magnetic nanowire arrays grown in anodized alumina templates offer a fertile ground to investigate the interplay among the exchange interaction, dipolar interaction, and magnetocrystalline anisotropy. In this study, we have successfully fabricated Co nanowire arrays with gradient diameter while maintaining the nanowire separation. Consequently, we are able to obtain nanowire arrays with dominant exchange interaction at one end with small nanowire dimeter and dominant dipolar interaction at the other with large nanowire diameter. These samples show very different magnetic properties from those observed in magnetic nanowire arrays with uniformly diameter. The easy magnetization axis, coercivity, saturation field, and reversal processes are all controlled collectively by both ends of the nanowires, which cannot be viewed as the combination of magnetic nanowire arrays with thin and thick diameters.
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Journal of Materials Chemistry C
·
2018
·Vol. 7
·期 2
·247-255
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IF 5.976
Chunyan Jiang,Mikhail G. Brik,Alok M. Srivastava,Lihua Li,Mingying Peng
Mn4+ doped fluoride phosphors have attracted tremendous attention in the solid-state lighting field due to the outstanding feature of efficient narrow band red emission. However, poor resistance against moisture-induced luminescence quenching is a recognized obstacle for realizing their wider commercial use. Herein, we design and fabricate a highly stable red phosphor based on previously unnoticed Rb2SnF6:Mn4+, which, estimated by the single crystal X-ray diffraction data, crystallizes in the trigonal space group Pm1 with the lattice parameters a = b = 6.0323(12) Å, c = 4.7880(8) Å, and V = 150.89(7) Å3. The Rb2SnF6:Mn4+ as expected exhibits highly efficient red emission upon excitation by UV and blue light. Significantly, the poor water resistance is conquered by constructing a protective deactivated layer with surface reduction of Mn4+. A treatment solution with appropriate reducing ability is emphasized to obtain Rb2SnF6:Mn4+ with simultaneous high brightness and water resistance. The results show that the low concentration of H2C2O4 solution treated Rb2SnF6:Mn4+ preserves a bright red-emitting color analogous to its initial color and >95% of its initial emission intensity when immersing in water at room temperature (RT) and in boiling water for 3 h. Lastly, by employing H2C2O4 treated Rb2SnF6:Mn4+ as a red phosphor, a high quality WLED with a CRI of 90, CCT of 3936 K and luminous efficacy of 106.24 lm W−1 is fabricated. This work not only experimentally fabricates a new efficient and stable Rb2SnF6:Mn4+ phosphor that can be used for high performance warm WLEDs but also provides a deep insight into how to well address moisture-induced Mn4+ luminescence quenching through appropriate reduction of Mn4+, opening up new opportunities for future solid-state lighting purposes.
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BIOSENSORS & BIOELECTRONICS
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2019
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IF 9.518
Yuezhu Wang,Hanmin Zhang,Yujie Feng,Baikun Li,Mingchuan Yu,Xiaotong Xu,Lu Cai
A sediment microbial fuel cell electro-Fenton (SMFC-E-Fenton) system was proposed in this study by utilizing the biological electrons produced from an SMFC to power an E-Fenton process. Antibiotics with different absorbability in both aqueous and solid phase can be removed by this system at room temperature and pressure condition, without external power or other chemical reagents . γ-FeOOH graphene polyacrylamide carbonized aerogel (γ-FeOOH GPCA) with high electrochemically active surface area (EASA), good conductivity and stable electrochemical activity were used as the cathode. After 40 h treatment, the total degradation rate of sulfamethoxazole (SMX) and norfloxacin (NOR) were 97.4 ± 2.9% and 96.1 ± 3.0%, respectively. Compared with the sludge digestion system, the residual SMX and NOR in sludge declined from 10.2 ± 1.5% to 1.1 ± 1.2% and from 31.3 ± 1.8% to 3.1 ± 1.3%, respectively. The E-Fenton process can also promote electricity production and sludge reduction efficiency of SMFC, as the maximum power density SMFC-E-Fenton system reached 472.21 ± 11.5 mW m −2 and 431.39 ± 15.6 mWm −2 , respectively. 6.2 ± 0.3% and 5.7 ± 0.8% of the initial sludge was reduced while treating SMX and NOR.
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CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Xiuwei Ao,Wenjun Sun,Simiao Li,Chao Yang,Chen Li,Zedong Lu
This study employed the medium pressure UV/peroxymonosulfate (MPUV/PMS), a new sulfate radical-based advanced oxidation process, to eliminate tetracycline (TTC) in water. At pH = 3.7, initial TTC concentration of 11.25 μM, PMS dosage of 0.2 mM and UV dose of 250 mJ cm −2 , 82% of TTC was degraded by MPUV/PMS. The second-order reaction rate constants of TTC with SO 4 − and OH were found to be 1.4 × 10 10 M −1 s −1 and 6.0 × 10 9 M −1 s −1 , respectively. Radical quenching experiments indicated that OH played the major role in the degradation of TTC. Higher PMS dosage (0.1–1.0 mM) and higher pH (3–11) could accelerate the TTC removal. Besides, the presence of Cl − (0.1–5.0 mM) and CO 3 2− (0.05–0.5 mM) could also promote the reaction. Eight transformation products (TPs) were identified, and the potential degradation pathways mainly involved hydroxylation, demethylation and decarbonylation processes. The variation in the genotoxicity was investigated using the umu -test, and the results indicate that the genotoxicity of TTC after the MPUV/PMS treatment significantly increased during the initial stage. In addition, the ecotoxicity and mutagenicity of TTC and its TPs were predicted using quantitative structure-activity relationship (QSAR) analysis, and the results revealed that some TPs could have equivalent and even higher toxicity than TTC. MPUV/PMS showed better performance in TTC degradation in real waters than in Milli-Q water. MPUV/PMS is concluded to be an efficient method for removing TTC, but more attention should be paid to the changes of toxicity during this process.
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