JOURNAL OF FLUORESCENCE
·
2023
·
IF 2.7
Heng Chendi,He Bowen,Wang Li
In this study, a dual-mode ratiometric fluorometric and colorimetric platform for the determination of nitrite in pickles was proposed by exquisitely employing the fact that non-fluorescent o -Phenylenediamine (OPD) was oxidized by nitrite under acidic conditions to form fluorescent 2,3-diaminophenazine (DAP) (Em = 575), which meanwhile quench the fluorescent nitrogen-doped carbon dots (N-CDs) at 455 nm, the ratio of fluorescence intensity of DAP to N-CDs (F 575 /F 455 ) changed with the increase of nitrite accompanied by visible color changes. Thus, nitrite can be quantitatively detected within a wide linear range (10–500 µM) with a low detection limit of 0.45 µM due to the high quantum yield of 39.7% of N-CDs. In addition, the colour of the N-CDs/OPD system changed from transparent to yellow when the nitrite was introduced, enabling colorimetric and on-site visual detection. The detection limit of the colorimetric method was 3.03 µM with a linear range of 10–500 µM. The proposed ratiometric fluorometric method has pleasant selectivity and good immunity to interference.
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高影响因子
CARBON
·
2023
·
IF 10.9
Zhou Yang,Jin Zhang,Changfeng Wang,Hanzhong Cui,Li Yang,Huiyan Zhang,Renguo Guan
Graphene has been recognized as reinforcement and/or protective coating for metal materials due to its unique electronic, mechanical properties and chemical inertness . Challenges of graphene agglomeration and weak graphene/metal interfacial bonding still exist during preparation. Here we report a novel method combining capillary-assisted self-assembly with nascent hydrogen reduction technique to one step coat Al foil with layered-stacking graphene. Al foil constructed slit is filled with graphene oxide (GO) suspensions and the generation of nascent hydrogen occurs at the GO/Al interface. The capillary force drives the GO flakes to layer-by-layer assemble on Al foil, as well as increases the reduction depth of GO. X-ray photoelectron spectroscopy (XPS) reveals that the reduced GO (rGO) binds with Al is not just through van der Waals forces, but with a strong interaction of developing C–O–Al bonds. The hydroxyl groups on GO plays an essential role in the formation of such C–O–Al configuration. Al foil coated with rGO through this capillary-assisted self-assembly with nascent hydrogen reduction method show good corrosion resistance compared to the pristine Al and directly drop-casted GO on Al. The proposed method can be readily applied to the fabrication of graphene/metal composites with improved interfaces.
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LWT-FOOD SCIENCE AND TECHNOLOGY
·
2023
·
IF 6
Shupeng Su,Xinyi Yin,Wenyu Du,Liying Han,Qiu Wu,Hongyan Zhang
Emulsions co-stabilized by like-charged cationic ethyl lauroyl arginate (LAE) and positively charged chitosan/sodium tripolyphosphate (CS-TPP) nanoparticles at low doses were prepared. The effects of CS-TPP nanoparticle concentration, LAE concentration, and pH on storage stability and mean droplet diameter were investigated, and the emulsion microstructure was examined by confocal laser scanning microscopy. The emulsions formed by LAE and CS-TPP were O/W emulsions, different from W/O emulsions formed by CS-TPP alone. The stability of the emulsions co-stabilized by LAE and CS-TPP was superior to that of the emulsions stabilized by LAE alone or CS-TPP nanoparticles alone. The emulsions could maintain good stability with 0.5 mM LAE and 0.08 wt% CS-TPP at pH ranging from 3.5 to 5.5. After standing and layering, the upper cream layer of CS-TPP+LAE emulsions could form stable high internal phase emulsions. For the novel emulsion, LAE dominated the formation of emulsion droplets, and adsorbed CS-TPP nanoparticles played a crucial role in the emulsion stability. The adsorbed CS-TPP nanoparticles discretely attached to oil droplets could form a strawberry-like construct, which could prevent the coalescence of emulsion droplets through electrostatic repulsion and steric hindrance. This work demonstrates the capacity of low dose food-grade emulsifiers and stabilizers to form stable emulsions.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Qifa Wan,Faming Zhang,Yifeng Xiong,Caiyun Shang
Using a simple and scalable solid-state synthesis process, a series of spinel-structured high-entropy oxides were systematically designed and synthesized in a Co–Mn–Fe–Cr–Ni–Zn–O system. These included (Co,Mn,Fe,Cr) 3 O 4 , (Co,Mn,Fe,Ni) 3 O 4 , (Co,Mn,Fe,Cr,Ni) 3 O 4 , (Co,Mn,Fe,Zn) 3 O 4 , (Co,Mn,Fe,Cr,Zn) 3 O 4 , (Co,Mn,Fe,Ni,Zn) 3 O 4 and (Co,Mn,Fe,Cr,Ni,Zn) 3 O 4 . The phase, microstructure and color evolution of 1/3Co 3 O 4 –1MnO-1/2Fe 2 O 3 -1/2Cr 2 O 3 –1NiO powders were studied without ZnO addition. These underwent four phase evolution processes and three color evolution processes before forming the final phase of black, octahedral (Co,Mn,Fe,Cr,Ni) 3 O 4 powders. The formation of an intermediate phase of (Co,Mn,Fe) 3 O 4 medium-entropy oxide powders served as the foundation for the creation of other high-entropy oxide powders. The infrared radiation properties of these synthesized medium and high-entropy oxides powders were evaluated in the near-infrared region at room temperature. Among these synthesized powders, the infrared emissivity values of (Co,Mn,Fe) 3 O 4 , (Co,Mn,Fe,Ni) 3 O 4 and (Co,Mn,Fe,Cr,Ni) 3 O 4 powders exceeded 0.8. All the synthesized powders exhibited excellent thermal stability after being annealed at high temperatures. Notably, after being annealed at high temperatures, the infrared emissivity values of these synthesized powders increased markedly without degradation, surpassing a value of 0.8, and displayed potential for applications in the field of high-temperature infrared energy savings.
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ACS Nano
·
2023
·
IF 17.1
Yanfei Sun,Jiangzhou Xie,Zhenzhen Fu,Huiying Zhang,Yebo Yao,Yixiang Zhou,Xiaoxuan Wang,Shiyu Wang,Xueying Gao,Zheng Tang,Shuyuan Li,Xiaojun Wang,Kaiqi Nie,Zhiyu Yang,Yi-Ming Yan
Efficient conversion of carbon dioxide (CO2) into value-added materials and feedstocks, powered by renewable electricity, presents a promising strategy to reduce greenhouse gas emissions and close the anthropogenic carbon loop. Recently, there has been intense interest in Cu2O-based catalysts for the CO2 reduction reaction (CO2RR), owing to their capabilities in enhancing C–C coupling. However, the electrochemical instability of Cu+ in Cu2O leads to its inevitable reduction to Cu0, resulting in poor selectivity for C2+ products. Herein, we propose an unconventional and feasible strategy for stabilizing Cu+ through the construction of a Ce4+ 4f–O 2p–Cu+ 3d network structure in Ce-Cu2O. Experimental results and theoretical calculations confirm that the unconventional orbital hybridization near Ef based on the high-order Ce4+ 4f and 2p can more effectively inhibit the leaching of lattice oxygen, thereby stabilizing Cu+ in Ce-Cu2O, compared with traditional d–p hybridization. Compared to pure Cu2O, the Ce-Cu2O catalyst increased the ratio of C2H4/CO by 1.69-fold during the CO2RR at −1.3 V. Furthermore, in situ and ex situ spectroscopic techniques were utilized to track the oxidation valency of copper under CO2RR conditions with time resolution, identifying the well-maintained Cu+ species in the Ce-Cu2O catalyst. This work not only presents an avenue to CO2RR catalyst design involving the high-order 4f and 2p orbital hybridization but also provides deep insights into the metal-oxidation-state-dependent selectivity of catalysts.
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高影响因子
FOOD CONTROL
·
2023
·
IF 6
Xiaoyue Yang,Christophe Blecker,Huan Liu,Dequan Zhang,Zhenyu Wang
To elucidate the regulation of different structures of polyphenolic compounds with m-hydroxy and o-hydroxy groups inhibiting the formation of different heterocyclic amines (HAs), the reactions between classified polyphenols (cover flavonoids , phenolic acids , stilbenes, coumarins, chalcones, and with different hydroxyl groups) and roasted lamb patties were studied, and then validated in model systems in vitro. The results indicated that the chalcone, coumarin, and stilbene compounds were more efficient to inhibit the HAs generation in roasted lamb patties in comparison with the flavonoids, while phenolic acid had the worst effect. Besides, polyphenols inhibit the formation of HAs through a synergistic action of scavenging free radicals and trapping active carbonyls. Polyphenols with m-hydroxyl structures have a stronger inhibition of PhIP 1 , Harman and Norharman by capturing the reaction intermediate carbonyl compounds . Polyphenols with the o-hydroxyl group had a stronger inhibitory effect on MeIQx by scavenging free radicals. It was concluded that the ability of polyphenols to inhibit different HAs can be predicted by their m-hydroxyl and o-hydroxyl groups.
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Bioactive Materials
·
2023
·
IF 18.9
Yucong Li,Linlong Li,Ming Wang,Boguang Yang,Baozhen Huang,Shanshan Bai,Xiaoting Zhang,Nan Hou,Haixing Wang,Zhengmeng Yang,Chong Tang,Ye Li,Wayne Yuk-Wai Lee,Lu Feng,Micky D. Tortorella,Gang Li
Lacking self-repair abilities, injuries to articular cartilage can lead to cartilage degeneration and ultimately result in osteoarthritis. Tissue engineering based on functional bioactive scaffolds are emerging as promising approaches for articular cartilage regeneration and repair. Although the use of cell-laden scaffolds prior to implantation can regenerate and repair cartilage lesions to some extent, these approaches are still restricted by limited cell sources, excessive costs, risks of disease transmission and complex manufacturing practices. Acellular approaches through the recruitment of endogenous cells offer great promise for in situ articular cartilage regeneration. In this study, we propose an endogenous stem cell recruitment strategy for cartilage repair. Based on an injectable, adhesive and self-healable o-alg-THAM/gel hydrogel system as scaffolds and a biophysio-enhanced bioactive microspheres engineered based on hBMSCs secretion during chondrogenic differentiation as bioactive supplement, the as proposed functional material effectively and specifically recruit endogenous stem cells for cartilage repair, providing new insights into in situ articular cartilage regeneration.
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JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Yajie Liu,Huaqiang He,Tie-Jun Zhang,Tian C. Zhang,Yuan Wang,Shaojun Yuan
It is highly attractive to develop highly efficient oil-in-water (O/W) emulsion separation technologies for promoting the oily wastewater treatment . Herein, a novel inversely Stenocara beetle -like hierarchical structure of superhydrophobic SiO 2 nanoparticle-decorated CuC 2 O 4 nanosheet arrays were prepared on copper mesh membrane by bridging polydopamine (PDA) to make a SiO 2 /PDA@CuC 2 O 4 membrane for substantially enhanced separation of O/W emulsions. The superhydrophobic SiO 2 particles on the as-prepared SiO 2 /PDA@CuC 2 O 4 membranes were served as localized active sites to induce coalescence of small-size oil droplets in oil-in-water (O/W) emulsions. Such innovated membrane delivered outstanding demulsification ability of O/W emulsion with a high separation flux of 2.5 kL⋅m −2⋅ h −1 and its filtrate’s chemical oxygen demand (COD) being 30 and 100 mg⋅L −1 for surfactant-free emulsion (SFE) and surfactant-stabilized emulsion (SSE), respectively, and also exhibited a good anti-fouling performance in cycling tests. The innovative design strategy developed in this work broadens the application of superwetting materials for oil-water separation and presents a promising prospect in practical oily wastewater treatment applications.
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高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2023
·
IF 2.8
Hongxu Bao,Min Liu,Xianhui Li,Nanqi Ren,Jianzheng Li
A packed-bed anaerobic-aerobic reactor (PBAOR) with two anaerobic and two aerobic compartments was constructed to treat manure-free piggery wastewater which was characterized by high ammonium (NH4+-N) and low ratio of chemical oxygen demand (COD) to total nitrogen (TN). Performed for 60 days at the normal atmospheric temperature of 25 °C with a constant hydraulic retention time of 32 h and reflux ratio of 2.0, a stable state in pollutants removal was obtained in the PBAOR. Within the next routine operation process, the removal of COD, NH4+-N and TN was above 85.7%, 98.2% and 85.8%, with a residual less than 81.7, 7.2 and 39.9 mg L−1 in effluent, respectively. Twelve veterinary antibiotics classified into tetracyclines (TCs), sulphonamides (SAs) and fluoroquinolones (FQs) were detected from the piggery wastewater. The PBAOR was effective in removing TCs and SAs with an average removal of 74.8% and 93.3%, respectively, but presented a negative removal for FQs. Most COD in the piggery wastewater was mainly removed in the first two anaerobic compartments along with an obvious removal of TCs and SAs, while the TN were mainly removed in the last two aerobic compartments with the negative removal of FQs.
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高影响因子
Materials Chemistry Frontiers
·
2019
·Vol. 3
·期 3
·456-463
·
IF 0
Bin Xiao,Wen-hai Zhang,Hai-feng Xia,Zhi-teng Wang,Lin-bo Tang,Chang-sheng An,Zhen-jiang He,Hui Tong,Jun-chao Zheng
V2(PO4)O is a novel promising anode material because of its stable crystal structure, low cost, and environmentally friendliness. However, its low electronic and ionic conductivity result in poor specific capacity and rate performance, hindering its industrial application. In this study, V2(PO4)O/C@CNT hollow spheres (HSs) with a core–shell structure were successfully synthesized by a simple spray drying method. Pluronic® F-127 acted as a carbon source and template, and induced the V2(PO4)O particles to form HSs. The V2(PO4)O/C@CNT HSs were composed of uniform HSs of about 0.4–0.6 μm in diameter and carbon nanotubes (CNTs). The HS structure enhances the electronic conductivity and lithium ion transport rate of V2(PO4)O/C materials and thus helps improve the electrochemical performance. CNTs not only increase the electronic conductivity and lithium ion transport rate, but also hinder the aggregation of the HSs. These activities enhance the electrochemical performance. The lithium ion storage behavior of V2(PO4)O/C@CNT HSs is systematically studied in the potential range 0.01–3.0V. The V2(PO4)O/C@CNT HS anode can achieve a high reversible capacity of 894.9 mA h g−1 at 0.1 A g−1 and can obtain a reversible capacity of 490.4 mA h g−1 at a high rate of 5 A g−1, perhaps the best electrochemical performance demonstrated so far for a V2(PO4)O anode material (specific capacity and rate performance), indicating its promise for application as an anode material in advanced lithium-ion batteries.
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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Ximing Qu,Linfan Shen,Yujie Mao,Jinxia Lin,Yuyang Li,Guang Li,Yuyang Zhang,Yanxia Jiang,Shigang Sun
Electrochemical nitrogen reduction reaction (NRR) has been considered as a promising alternative to the traditional Haber–Bosch process for the preparation of ammonia (NH3) under ambient conditions. The development of cost-effective electrocatalysts with suppressive activity for hydrogen evolution reaction is critical for improving the efficiency of NRR. Herein, oxygen-containing molybdenum carbides (O-MoC) embedded in nitrogen-doped carbon layers (N-doped carbon) can be easily fabricated by pyrolyzing the chelate of dopamine and molybdate. A rate of NH3 formation of 22.5 μg·h–1·mgcat–1 is obtained at −0.35 V versus reversible hydrogen electrode with a high faradaic efficiency of 25.1% in 0.1 mM HCl + 0.5 M Li2SO4. Notably, the synthesized O-MoC@NC-800 also exhibits high selectivity (no formation of hydrazine) and electrochemical stability. The moderate electron structure induced by the interaction between O-MoC and N-doped carbon shells can effectively weaken the activity of hydrogen evolution reaction and increase the faradaic efficiency of NRR. Additionally, by applying the in situ Fourier transform infrared spectroscopy, an associative reaction pathway is proposed on O-MoC@NC-800. This work provides new insights into the rational design of carbon-encapsulated metal nanoparticles as efficient catalysts for NRR at ambient conditions.
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BIOMEDICINE & PHARMACOTHERAPY
·
2019
·
IF 3.743
James Asenso,Jun Yu,Feng Xiao,Mingyi Zhao,Jian Wang,Yijin Wu,Chun Wang,Wei Wei
Paeoniflorin-6'-O-benzene sulfonate (CP-25), is a novel derivative of paeoniflorin (Pae) with improved anti-arthritic effects. The aim of this study was to evaluate the therapeutic effects and pharmacokinetics of CP-25 when co-administered with MTX in adjuvant-induced arthritis (AA) rats. AA rats were randomly divided into 6 groups and treated as follows: TGP (50 mg/kg/day, ig), CP-25 (50 mg/kg/day, ig), MTX (0.5 mg/kg, 3 times/week, ig), TGP (50 mg/kg/day, ig) + MTX (0.5 mg/kg, 3 times/week, ig) and CP-25 (50 mg/kg/day, ig) + MTX (0.5 mg/kg, 3 times/week, ig) from days 14 - 35 after induction. Clinical, biochemical, and histological scores were used to assess the severity of arthritis while novel ultra-performance liquid chromatography mass spectrometry (UPLC-MS/MS) was used to detect plasma concentration of CP-25. Co-administration of CP-25 and MTX significantly reduced clinical signs of inflammation, suppressed the serum production of IL-17 compared to TGP (50 mg/kg/day, ig) and MTX (0.5 mg/kg, 3 times/week, ig). Pharmacokinetics studies showed increased AUC 0-t , C max , and t 1/2 of CP-25 while V/F and CL/F decreased when co-administered with MTX. We observed an increase concentration and longer exposure with decreased clearance of CP-25 when combined with MTX, that should be further explored for clinical RA therapy.
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危险品化学品经营许可证（带存储）