Polymers
·
2023
·Vol. 15
·期 2
·271
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IF 5
Zuwu Tang,Meiqiong Yu,Ajoy Kanti Mondal,Xinxing Lin
In this paper, porous scaffolds based on composite hydrogels were fabricated using polydopamine (PDA), chondroitin sulfate (CS), and polyvinyl alcohol (PVA) via the freezing/thawing method. Different characteristics of the prepared composite hydrogels, including the pore sizes, compression strength, lap shear strength, mass loss, and cytocompatibility were investigated. Scanning electron microscope images (SEM) displayed the hydrogel pore sizes, ranging from 20 to 100 μm. The composite hydrogel exhibited excellent porosity of 95.1%, compression strength of 5.2 MPa, lap shear strength of 21 kPa on porcine skin, and mass loss of 16.0%. In addition, the composite hydrogel possessed good relative cell activity of 97%. The PDA/CS/PVA hydrogel is cytocompatible as a starting point, and it can be further investigated in tissue engineering.Keywords:composite hydrogel;cytocompatibility;porosity;porous scaffolds
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ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Tianyu Zhu,Cuiping Yu,Yucheng Wu,Yan Wang
The capacity of Li4Ti5O12 (LTO) at high rates is limited due to the polarization caused by its modest Li-ion (Li+) diffusion coefficient and low electrical conductivity. Coating with ionic conductors is an available method to ameliorate charge transport. Li1+xAlxTi2–x(PO4)3 ion conductors with thermal, chemical, and electrochemical stabilities have been proven to be modification materials for electrodes. Herein, the Li1.4Al0.4Ti1.6(PO4)3 (LATP) precursor dispersion with optimized preparation is applied to the surface modification of LTO by a dynamic mix-drying method. A proper amount of LATP ultrafine particle coating could develop the ion transport rate in the electrode and restrain side reactions. The 2 wt % LATP–LTO anode exhibits an optimized capacity of 168.2 mA h g–1 at 0.1 A g–1 and retains 96.7% of its capacity after 5000 cycles at 5.0 A g–1, while the P-LTO anode retains 86.3% of the capacity. Improved Li+ transport and interface stability in the electrodes lead to the boosted rate and cycling stability. The LATP-modified LTO composites provide a possibility for the further application of related materials in the energy storage field.
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MATERIALS & DESIGN
·
2023
·
IF 8.4
Suhua Jiang,Fukai Zhu,Yang Lin,Liu Ran,Fulin Lin,Haina Tian,Ting Hu,Peiyuan Wang,Canzhong Lu
Owing to residual tumor tissues around the treatment margins, it is difficult to totally ablate large tumors, eliminate disseminated and metastatic nodules as well as prevent the tumor recurrence simultaneously by conventional photothermal therapy (PTT). In this work, PTT combined reactive oxygen species oxidative therapy (ROT) was conducted via mesoporous polydopamine nanosphere with nanoceria doping (MPDA-Ce). After surface anchoring with Arg-Gly-Asp (RGD) molecules, the dispersive stability and tumor targeting of this innovative nanoplatform were substantially boosted. In vitro studies revealed that the unique nanotherapeutics had satisfactory photothermal conversion efficiency (η = 51.41%), continuous nanoceria release in cytoplasm of tumor cells after acid microenvironment (pH = 5.5) induced biodegradation. Significantly, hyperthermia amplified the abundant reactive oxygen species generation under 808 nm laser irradiation that potent ROT was realized with only 27.1% cells alive. Strikingly, Indocyanine green (ICG) loaded MPDA-Ce with RGD modification shows robust tumor targeting capability in breast carcinoma bearing Balb/C mice under fluorescent imaging in the second near-infrared window. The combined treatments resulted in complete tumor cells eradication under 808 nm laser illumination both in vitro and in vivo . This work highlights the promising application of MPDA-Ce as a powerful nanoplatform for ROT and PTT combined treatment in clinical.
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 11
·2213961
·
IF 19
Linghui Zhang,Chao Fu,Shi Wang,Minhuan Wang,Ruiting Wang,Shengling Xiang,Zhiyong Wang,Jing Liu,Hongru Ma,Yudi Wang,Ying Yan,Min Chen,Lei Shi,Qingshun Dong,Jiming Bian,Yantao Shi
Flexible perovskite solar cells (f-PSCs) show great promise in portable-power applications (e.g., chargers, drones) and low-cost, scalable productions (e.g., roll-to-roll). However, in conventional n–i–p architecture f-PSCs, the low-temperature processed metal oxide electron transport layers (ETLs) usually suffer from high resistance and severe defects that limit the power conversion efficiency (PCE) improvement of f-PSCs. Besides the enhancement in the mobility of metal oxide and passivation for perovskite/ETL interfacial defects reported in previous literature, herein, the electron transport loss between the metal oxide nanocrystallines within the ETL is studied by introducing an amorphous F-doped TiO x (F-TiO x ) caulked crystalline SnO 2 composite ETL. The F-TiO x in this novel composite ETL acts as an interstitial medium between adjacent SnO 2 nanocrystallines, which can provide more electron transport channels, effectively passivate oxygen vacancies, and optimize the energy level arrangement, thus significantly enhancing the electron mobility of ETL and reducing the charge transport losses. The composite ETL-based f-PSCs achieve a high PCE of 22.70% and good operational stability. Furthermore, a moderate roughness of the composite ETL endows f-PSCs with superior mechanical reliability by virtue of a strong coupling at the ETL/perovskite interface, by which the f-PSCs can maintain 82.11% of their initial PCE after 4000 bending cycles.
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Nano Energy
·
2022
·
IF 19.069
Yu Luo,Xia Cao,Zhong Lin Wang
Environmental pressure has a negative effect on plant health and productivity, so accurate monitoring of environmental pressure is of great significance for improving food production and smart agriculture. Here, composite films with good stability and humidity sensitivity are made via solution-casting process of multilayer graphene oxide (GO), spherical polyvinylsilsesquioxane (PVSQ), and polyvinyl alcohol (PVA). Subsequently, a living plant leaf-based triboelectric nanogenerator (LPL-TENG) consisting of the GO-PVSQ/PVA composite films and the living leaves is proposed. With a maximum average power density of 90.67 mW/m -2 , the LPL-TENG can drive miniature commercial electronic equipment. The LPL-TENG is able to respond linearly to plant leaf humidity with a sensitivity of about − 3.0 V/% RH without affecting plant growth. In addition, the feature of alarming at high wind speed can also be exhibited by the LPL-TENG to realize remote control. This work has broad application prospects in building smart agriculture.
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Arabian Journal of Chemistry
·
2022
·
IF 6.212
Xin Liu,Hao Cai,Minjie Niu,Hui Yu,Mengqing Wang,Hui Zhu,Gang Cao,Ke Pei,Yu Duan,Jiantao Song
Fructus Corni (FC), as a promising Chinese medicinal herb, has aroused considerable interest. Generally, FC needs to be processed according to the limited standard policy in China before clinical application, while the investigations on the specific processing methods (such as wine steaming or high-pressure wine steaming) are unclear. A comprehensive metabolomics strategy based on integrated non-targeted metabolomics and targeted glycomics in this paper was implemented to investigate the influences of the different processing technologies such as steaming, wine steaming, high-pressure steaming, high-pressure wine steaming, wine immersion, and wine stir-frying on FC, respectively. UHPLC-Q-TOF-MS/MS was employed for identifying and distinguishing the secondary metabolites. A total of 85 components were identified in all groups. The results of PCA score plots showed that the crude and processed samples had a complete separation, and wine steamed and high-pressure wine steamed samples could be a category, indicating that the two processed products had a similar quality. Multiple chromatography including HPLC (C 18 )-PDA, HPLC (NH 2 )-ELSD, and HPGPC-ELSD was used for determining the molecular weight distributions, the monosaccharide compositions of polysaccharides, and the contents of free monosaccharides and oligosaccharides. The results indicated that the content and composition of saccharides were different in crude and different processed FC. The polysaccharides were composed of fucose, arabinose, galactose, glucose, galacturonic acid, mannose and rhamnose, and the free monosaccharides were composed of fucose, arabinose, galactose, glucose, mannose, rhamnose and fructose in all FC samples. The PCA score plots of the glycomics indicated that the crude and high-pressure wine steamed FC could be a category, showing that the two groups had similar chemical compositions. Ultimately, the simulation processing experiments indicated that the transformation of morroniside, polysaccharides, oligosaccharides, fructose, and glucose to 5-HMF through the reactions of dehydration and deglycosylation was the potential mechanism of enhancing the effects by processing. Conclusionly, the saccharides should be investigated as thoroughly as the secondary metabolites, and the high-pressure wine steamed FC could be an alternative to wine steamed FC.
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ANALYTICAL CHEMISTRY
·
2022
·
IF 8.008
Shendong Liu,Danxuan Lin,Yunping Lai,Li Hou,Tianran Lin,Shulin Zhao
By combining the photothermal properties of the 3,3′,5,5′-tetramethylbenzidine oxidation product (TMBox) with the sensitive quenching of perovskite fluorescence by ammonia gas, a gas-mediated immunoassay at atmospheric pressure was constructed, which took the fluorescence quenching length of perovskite fluorescent capillary as the signal output. First, a CsPbBr3 perovskite with surface modification of 3-aminopropyl triethoxysilane was synthesized by thermal injection and decorated to the capillary wall by glutaraldehyde cross-linking. In the presence of H2O2 and the tumor marker carcinoembryonic antigen (CEA), TMB was oxidized to TMBox by the horseradish peroxidase (HRP)-labeled CEA antibody. The photothermal effect of TMBox at 808 nm laser irradiation increases the concentration of ammonia gas, and the prepared fluorescent capillary can respond sensitively to ammonia gas. The fluorescence quenching length can be observed by the naked eye for a semiquantitative evaluation of CEA concentration. At the same time, we developed a mobile APP for the first time to measure the fluorescence quenching length. In the range of 0–20 ng mL–1, the quenching length increased linearly with the increase in CEA concentration, and the detection limit was 0.078 ng mL–1. This method has been successfully used for the detection of CEA in human serum with a recovery of 95.8%–106.5%.
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 58
·期 2
·880-889
·
IF 4.682
Min Huihua,Fan Deqi,Zhang Hao,Xu Xueling,Yang Xiaofei,Lu Yi
Harvesting solar energy to convert thermal energy is a promising technology that enables substantial eco-friendly applications to alleviate freshwater and energy crisis. To realize rapid and energy-efficient solar driven steam evaporation, developing efficient photothermal conversion materials are significantly important. Here is a facile approach for constructing a three-dimensional (3D) pillar hydrogel based on FeCoNiCrO x (FCNCO) for effective water treatment. Taking advantage of high solar absorption property and low evaporation enthalpy, the CPH-2S can be capable of achieving surface plasmon resonance assisted water evaporation rates of 2.44 kg m −2 h −1 under 1 sun irradiation. This function endows the evaporator with a light-to-vapor conversion efficiency of 96%, which is induced by an elaborately constructed hydrogel with surface photons trapping and thermal localization capabilities. Meanwhile, the hydrogel exhibits salt resistance in seawater as well as the stability of solar evaporation performance. This work offers a rational design principle to create multi-metal component-based photothermal materials for developing a self-sustainable and solar-powered water-energy platform.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Chunyang Lu,Yangqin Gao,Wei An,Chengcheng Yan,Fengshan Yu,Wenyi Lu,Chunxia Wang,Guoyong Huang
Distinct from the traditional synthesis of NiCo 2 O 4 nanoflowers from hydrothermal approach. Herein a facile gas-liquid diffusion method was exploited to prepare NiCo 2 O 4 and Fe-doped NiCo 2 O 4 nanoflower under ambient condition for oxygen evolution reaction (OER). The remarkable nanoflowers was generated by diffusing ammonia to the homogeneous solution of cobalt and nickel sulfate salt with slight amount of Fe sulfate salt to form a heterogeneous precipitation, followed by pyrolysis to afford the final product of NiCo 2 O 4 or Fe-doped NiCo 2 O 4 . The remarkable feature of NiCo 2 O 4 displays a spherical nanoflower morphology composed of lamellar structure with excellent dispersibility and greatly prompt the electron transfer and enable a high activity. By varying the ratio of Ni to Fe to 9:1, a superior OER performance with overpotential of 256 mV and Tafel slope of 69 mV·dec −1 at 10 mA·cm −2 was obtained. We attribute the superior performance to the excellent gas and ion transport channels due to the unique nanoflower structure as well as the well optimized electronic structure derived from Fe doping. Besides, we tentatively propose a detailed formation process for the formation of this nanoflower structure based on co-precipitation reaction. In conclusion, this approach offers a facile and efficient way for the preparation of high-performance ternary mixed metal oxides nanostructure which enable its large-scale production of OER catalyst.
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FUEL
·
2022
·
IF 8.035
Hua Yan,Xiaowei Liu,Junhong Zhou,Dawei Li,Xiaoye Yang,Yiming Gu,Hongjiu Su,Shudong Wang
The development of anthraquinone (AQ) hydrogenation catalysts with high activity and selectivity remains a challenge, but it is critical in industrial applications from both economic and environmental perspectives. In this work, an amine-modified catalyst, i.e., Pd/A/SiO 2 , was designed and synthesized via grafting 3-aminopropyltrimethoxysilane (APTMS) onto silica support and then loading Pd via the Shiff-base reaction. Multiple techniques were used to thoroughly characterize and analyze the catalysts' structural and electronic properties, such as transmission electron microscopy (TEM), H 2 temperature-programmed reduction (H 2 -TPR), and X-ray photoelectron spectroscopy (XPS), etc. The Pd particle size (3.86 nm) in Pd/A/SiO 2 was found to be very close to the reported optimal value, which balances well between the number of active sites and the required size for AQ adsorption; also, the residual carbon species from APTMS improves the hydrophobic properties of the support, which benefits AQ adsorption and anthrahydroquinone (AQH 2 ) desorption; and furthermore, the electron transferred from N to Pd increases the electron density of the latter, favoring the activation of the C O bond in AQ. These factors combine to give a very superior performance of Pd/A/SiO 2 for AQ hydrogenation, including a hydrogenation efficiency as high as 15.7 g/L with an intriguing selectivity of 96.1 %, and a good reusability merit within a six-run test, all of which are among the best results reported so far. This work, we believe, provides food for thought in the development of a highly efficient catalyst for AQ hydrogenation.
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JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Ruixia Li,Minghui Shang,Taotao Zhe,Mingyan Li,Feier Bai,Zhihao Xu,Tong Bu,Fan Li,Li Wang
Developing electrode materials with excellent electrocatalytic properties for detecting pesticide residues plays a vital role in the safety of agricultural products and environmental applications. Herein, we designed a new electrochemical sensor on the basis of N-doped carbon hollow nanospheres modified with Sn/MoC Schottky junction (Sn/MoC@NC) for methyl parathion (MP) detection. The Sn/MoC@NC was prepared by self-assembled polymerization-anchoring strategy and high-temperature carbonization design. Sn/MoC Schottky junction and hollow nanosphere structure endow Sn/MoC@NC with a larger surface area, more active sites, and faster electron transfer , which is beneficial to enhancing its electrocatalytic performance. The structural characterizations and physicochemical properties of Sn/MoC@NC were explored through various microscopy, spectroscopic and electrochemical techniques. The experimental results confirmed that the calibration curve for current and MP concentration (0.05–10 μg/mL) was available under optimized conditions, and the sensitivity and detection limit were respectively determined to be 9.02 μA μM 1 cm 2 and 8.9 ng/mL. Furthermore, the constructed sensor displayed excellent selectivity , repeatability, and stability, which qualified it for use in detecting MP in grapes and tap water with satisfactory recovery. This work may provide some interesting prospects for constructing high-performance electrocatalysts for MP detection.
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Chem Catalysis
·
2023
·
IF 9.4
Weicheng Feng,Tianfu Liu,Rongtan Li,Jingwei Li,Xiaomin Zhang,Qingxue Liu,Junhu Wang,Mingrun Li,Qiang Fu,Yuefeng Song,Guoxiong Wang,Xinhe Bao
CO 2 electrolysis in solid oxide electrolysis cells (SOECs) is restricted by sluggish oxygen evolution reaction (OER) kinetics. Optimizing the electronic structure of anode material is an efficient strategy to improve OER activity and stability. Herein, the electronic structures of Ca x Sr 1- x Co 0.7 Fe 0.3 O 3-δ ( x = 0, 0.5, 1) anodes are modified by A-site-induced structural transformation. Physiochemical characterizations and density functional theory calculations reveal that the crystalline structural transformation from orthorhombic brownmillerite CaCo 0.7 Fe 0.3 O 3-δ to tetragonal perovskite SrCo 0.7 Fe 0.3 O 3-δ lifts up the O 2 p -band center to the Fermi level, which strengthens the M 3 d -O 2 p orbitals hybridization and increases the oxygen vacancy concentration, oxygen ion migration capacity, and electrical conductivity. At 800°C, SOEC with the SrCo 0.7 Fe 0.3 O 3-δ anode achieves the highest current density of 2.03 A cm −2 at 1.6 V with a stable operation of 487 h at 1.2 V, superior to the benchmark La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ , Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ and PrBaCo 2 O 6-δ anodes.
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