APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
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2022
·Vol. 128
·期 9
·1-9
·
IF 2.983
Xiong Sang,Zhang Xiaomeng,Liang Dong
Tungsten oxide (WO 3 ) nanomaterials have become a hot spot in the current research on metal oxides due to their good antibacterial and anticancer properties. In this paper, WO 3 was prepared by the sol–gel method, and samples with different structures and morphologies were obtained by controlling the pH value. Ammonium paratungstate and tetrabutyl titanate were used as raw materials, and the amount of Tetrabutyl titanate (TBOT) was changed to regulate the TiO 2 /WO 3 samples were prepared by varying the amount of TBOT. The structure, morphology and luminescence properties were also investigated. The results show that the monoclinic WO 3 nanoparticles as well as TiO 2 /WO 3 composite nanomaterials were prepared successfully. Under acidic and alkaline conditions, the particles are mainly rod-shaped and granular, and the smaller the pH is, the smaller the particle size is. The average grain size is 49.8 nm. The strongest luminescence of the samples at 611 nm was evident at an excitation wavelength of 394 nm. The luminescence property of WO 3 prepared under alkaline condition is better than that under acidic condition. The luminescence intensity of the prepared TiO 2 /WO 3 composites by adding 1 ml TBOT in acidic conditions increased by 21% compared with that of 2 ml TBOT. The luminescence intensity of the prepared TiO 2 /WO 3 composites by adding 2 mL TBOT in alkaline condition increased by 14% compared with that prepared by adding 1 mL TBOT.
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Nature Protocols
·
2022
·Vol. 17
·期 11
·2647-2667
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IF 17.021
Chen Wei,Zhang Pengchao,Yu Shaokang,Zang Ruhua,Xu Liming,Wang Shutao,Wang Bailiang,Meng Jingxin
Underwater superoleophobic materials have attracted increasing attention because of their remarkable potential applications, especially antifouling, self-cleaning and oil–water separation. A limitation of most superoleophobic materials is that they are non-transparent and have limited mechanical stability underwater. Here, we report a protocol for preparing a transparent and robust superoleophobic film that can be used underwater. It is formed by a hydrogel layer prepared by the superspreading of chitosan solution on a superhydrophilic substrate and biomimetic mineralization of this layer. In contrast to conventional hydrogel-based materials, this film exhibits significantly improved mechanical properties because of the combination of high-energy, ordered, inorganic aragonite (one crystalline polymorph of calcium carbonate) and homogeneous external hierarchical micro/nano structures, leading to robust underwater superoleophobicity and ultralow oil adhesion. Moreover, the mineralized film is suitable for neutral and alkaline environments and for containing organic solvent underwater and can be coated on different transparent materials, which has promising applications in underwater optics, miniature reactors and microfluidic devices. In this protocol, the time for the whole biomimetic mineralization process is only ~6 h, which is significantly shorter than that of traditional methods, such as gas diffusion and the Kitano method. The protocol can be completed in ~2 weeks and is suitable for researchers with intermediate expertise in organic chemistry and inorganic chemistry.
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Journal of Advanced Ceramics
·
2022
·Vol. 11
·期 9
·1431-1444
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IF 11.534
Jin Sen,Jing Huijuan,Wang Libo,Hu Qianku,Zhou Aiguo
Nowadays, photocatalytic technologies are regarded as promising strategies to solve energy problems, and various photocatalysts have been synthesized and explored. In this paper, a novel CdS/MoO 2 @Mo 2 C-MXene photocatalyst for H 2 production was constructed by a two-step hydrothermal method, where MoO 2 @Mo 2 C-MXene acted as a binary co-catalyst. In the first hydrothermal step, MoO 2 crystals with an egged shape grew on the surface of two-dimensional (2D) Mo 2 C MXene via an oxidation process in HCl aqueous solution. In the second hydrothermal step, CdS nanorods were uniformly assembled on the surface of MoO 2 @Mo 2 C-MXene in ethylenediamine with an inorganic cadmium source and organic sulfur source. The CdS/MoO 2 @Mo 2 C-MXene composite with MoO 2 @Mo 2 C-MXene of 5 wt% exhibits an ultrahigh visible-light photocatalytic H 2 production activity of 22,672 µmol/(g·h), which is ∼21% higher than that of CdS/Mo 2 C-MXene. In the CdS/MoO 2 @Mo 2 C-MXene composite, the MoO 2 with metallic nature separates CdS and Mo 2 C MXene, which acts as an electron-transport bridge between CdS and Mo 2 C MXene to accelerate the photoinduced electron transferring. Moreover, the energy band structure of CdS was changed by MoO 2 @Mo 2 C-MXene to suppress the recombination of photogenerated carriers. This novel compound delivers upgraded photocatalytic H 2 evolution performance and a new pathway of preparing the low-cost photocatalyst to solve energy problems in the future.
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NEUROCHEMICAL RESEARCH
·
2022
·Vol. 47
·期 10
·3178-3191
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IF 4.414
Wang Lei,Li Min,Zhu Cuiping,Qin Aiping,Wang Jinchun,Wei Xianni
The purpose of the present study was to evaluate the protective effect of Palmatine on LPS-induced depressive like behavior and explore its potential mechanism. The mice were intragastrically treated with Fluoxetine or Palmatine once daily for 1 week. After the last drug administration, the mice were intraperitoneally challenged with LPS and suffered for Sucrose preference test, Tail suspension test, Forced swimming test and Open field test. The pro-inflammatory biomarkers were measured by ELISA, qPCR, WB and immunofluorescence. As a result, the administration of Palmatine effectively lessened depressive-like behavior. Palmatine could decrease the levels of pro-inflammatory cytokines TNF-α, IL-6, the expressions of CD68, iNOS mRNA, as well as increase the levels of anti-inflammatory cytokines IL-4, IL-10, the expressions of CD206, Arg1 mRNA, Ym1 mRNA both in LPS-induced mice and in LPS-induced BV2 cells. The beneficial effect of Palmatine might be attributed to the suppression of M1 microglia polarization and the promotion of M2 microglia polarization via PDE4B/KLF4 signaling. The similar results were observed in CUMS-induced depressive mice. The transfection with PDE4B SiRNA or KLF4 SiRNA indicated that PDE4B and KLF4 were both involved in the Palmatine-mediated microglia polarization. Molecular docking indicated that Palmatine could interact with PDE4B. In conclusion, this research demonstrated that Palmatine attenuated depressive like behavior by modulating microglia polarization via PDE4B/KLF4 signaling.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2022
·Vol. 331
·期 9
·4047-4054
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IF 1.754
Zhao Tianji,Wu Haoyang,Sun Junjie,Wen Xinhai,Zhang Jie,Zeng Weihao,Shen Hao,Hu Zhitao,Huang Pingping
To decrease the contaminant leaching and radon exhalation from uranium tailings, a phosphoric acid-based geopolymer (PAG) precursor was selected as a solidifying agent to bind coarse sands to achieve compact structures. Machine learning was applied to explore the optimal ratio of geopolymer preparation, aimed at achieving a higher compressive strength of solidified bodies. Results showed that the maximum compressive strength of 18.964 MPa appeared at the mass ratio of 2.8 for phosphoric acid/kaolin. The uranium leaching rate of 0.70 × 10 −6 cm/d on the 42nd day was three orders of magnitude less than the clay mixture-based geopolymer solidified bodies. The successful synthesis of geopolymer was evidenced by the X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR), the homogeneous and dense structure of solidified bodies was characterized by the scanning electron microscopy (SEM).
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International Journal of Minerals Metallurgy and Materials
·
2022
·Vol. 29
·期 9
·1715-1721
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IF 3.85
Dang Hui,Chang Zhidong,Zhou Hualei,Ma Sihang,Li Min,Xiang Jialing
The effective and low-temperature extraction of lithium from the pyrometallurgical slag of spent lithium-ion batteries (LIBs) remains a great challenge. Herein, potassium carbonate/sodium carbonate (K 2 CO 3 /Na 2 CO 3 ), which could form a eutectic molten salt system at 720°C, was used as a roasting agent to extract lithium from pyrometallurgical slag. Lithium was successfully extracted from the slag by K 2 CO 3 /Na 2 CO 3 roasting followed by water leaching. Theoretical calculation results indicate that the lengths of Li-O bonds increase after K + /Na + adsorption, resulting in the easy release of Li + from the LiAlSi 2 O 6 lattice after roasting with K 2 CO 3 /Na 2 CO 3 . Thermogravimetry—differential scanning calorimetry results indicate that the eutectic phenomenon of K 2 CO 3 and Na 2 CO 3 could be observed at 720°C and that the reaction of the slag and eutectic molten salts occurs at temperatures above 720°C. X-ray diffraction results suggest that Li + in the slag is exchanged by K + in K 2 CO 3 with the concurrent formation of KAlSiO 4 , while Na 2 CO 3 mainly functions as a fluxing agent. The lithium extraction efficiency can reach 93.87% under the optimal conditions of a roasting temperature of 740°C, roasting time of 30 min, leaching temperature of 50°C, leaching time of 40 min, and water/roasted sample mass ratio of 10:1. This work provides a new system for extracting lithium from the pyrometallurgical slag of spent LIBs.
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CHROMATOGRAPHIA
·
2022
·Vol. 85
·期 9
·809-816
·
IF 2.213
Liu Yue,Lin Yuzi,Li Ping,Yang Huiwen,Huang Qingsong,Pan Yufang
Increasing numbers of studies suggest that short-chain fatty acids (SCFAs) are closely related to diabetes. However, the complexity of fecal pretreatment makes the detection of SCFAs in feces relatively difficult. In this study, we established a sample pretreatment protocol that involved no tedious steps, requiring only the grinding of appropriate amounts of feces into powder in liquid nitrogen. The SCFA content in feces was then detected using the headspace-gas chromatography (HS-GC) method. The method achieved good linearity ( R 2 ≥ 0.9940), and the limits of quantification (LOQs) and detection (LODs) of all investigated SCFAs ranged from 0.15 to 0.45 mM and 0.05 to 0.15 mM, respectively. The recoveries of the SCFAs ranged from 91.55 to 103.96% in mouse fecal samples. The HS-GC method was then applied to evaluate the effects of a neutral polysaccharide from Acanthopanax trifoliatus (ATP1-1) on the fecal SCFA content in streptozotocin (STZ)-induced diabetic mice. After 6 weeks of treatment with 140 mg/kg/d ATP1-1, the expression levels of acetic acid, propionic acid, butyric acid, isobutyric acid, isovaleric acid and valeric acid were increased by 215.4, 88.8, 95.3, 300.8, 260.7 and 158.0%, respectively, which indicated that the hypoglycemic effect of ATP1-1 may be related to its impact on SCFAs. Our simplified pretreatment of fecal samples is suitable for the analysis and detection of SCFAs in mouse feces by HS-GC.
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Frontiers of Optoelectronics
·
2022
·Vol. 15
·期 1
·1-9
·
IF 0
Zhou Xingwei,Zhang Wei,Zhang Zunhao,Wang Zizhun,Zou Xu,Li Dabing,Zheng Weitao
The oriented two-dimensional porous nitrogen-doped carbon embedded with CoS 2 and MoS 2 nanosheets is a highly efficient bifunctional electrocatalyst. The hierarchical structure ensures fast mass transfer capacity in improving the electrocatalytic activity. And the greatly increased specific surface area is beneficial to expose more electrocatalytically active atoms. For oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) tests in 1 mol/L KOH solution, only 194 and 140 mV overpotential are required to achieve a current density of 10 mA/cm 2 , respectively. Our research provides an effective strategy for synergizing the individual components in nanostructures for a wide range of electrocatalytic reactions. Graphical Abstract
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 21
·17036-17047
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IF 2.779
Zheng Jiahong,Yang Yamei,Cheng Kangkang,Ma Junyu,Yu Pengfei
In this paper, a novel and selective fluorescent probe for nanocomposite materials were developed by in situ growth carbon quantum dots (CQDs) in the channel of mesoporous silica nanospheres (MSNs) for the detection of tetracycline (TC). The CQDs@MSNs nanocomposites were prepared via a facile hydrothermal method. The CQDs incorporated into MSNs can act as the low-toxicity and stable fluorescent probes for the detection of TC. Under optimal conditions, a fluorescence emission peak at 439 nm was observed for the CQDs@MSNs when the excitation wavelength was set as 360 nm, and the fluorescence peak intensity can be gradually quenched by TC via inner filter effect, a good linear relationship between the concentration of TC from 0 to 100 μM, and the fluorescence quenching intensity of CQDs@MSNs was obtained, with a limit detection of 5.19 μM. More importantly, the CQDs@MSNs have been successfully used for TC determination in real samples.
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CHEMICAL PAPERS
·
2022
·Vol. 76
·期 10
·6323-6333
·
IF 2.146
Li Yan,Wu Tingxia,Song Lingyu,Zhu Yongbao,Chen Yizhe,Huang Yufu,Tang Junping,Cheng Kai,Lin Donghai,Chen Guosong
Natural graphite has a large electrical conductivity in plane direction, hundreds times of that in vertical direction. Regulating graphite flakes perpendicular to the plane will improve the performance of the sensor. As a non-connected method, magnetic field-assisted orientation can be no-additives. However, some studies believe that diamagnetic materials are non-magnetic, and must be doped by ferromagnetic materials before oriented by a magnetic field. Here, original graphite flakes were vertically oriented by a low magnetic field during the electrode preparation to increase effective surface area. The performance of electrode was enhanced in both potassium ferricyanide/potassium ferrocyanide probe system and detection of hydroquinone (HQ) and catechol (CC). For HQ and CC detection, the sensitivities of vertically oriented graphite flakes electrode are 5.05 times and 6.35 times higher than that of graphite flakes without magnetic field, respectively. This magnetic alignment technology could construct other electrode materials for electrochemical sensors.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 54
·81760-81776
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IF 5.19
Yang Hang,Ding Zimao,Zou Yilingyun,Liu Yangxiya,Zhang Yi,Xia Shibin
In this work, second pyrolysis oil-based drill cutting ash (OBDCA-sp) was modified using NaOH and cetyltrimethylammonium bromide (CTAB), respectively. The modified OBDCA-sp was used as the novel adsorbent for adsorption of tetracycline (TC) in aqueous solutions. The original and modified OBDCA-sp were characterized by SEM, XRD, FTIR, zeta potential analysis, contact angle, and BET. The maximum theoretical adsorption quantity (45 ℃) for TC was calculated as 1.7 mg/g using CTAB-OBDCA-sp as the adsorbent. The adsorption isotherm of TC on OBDCA-sp was fitted well with Freundlich model and the adsorption kinetic was illustrated by pseudo-second-order model. Neutral condition was favorable for the adsorption of TC. The result of regeneration experiment indicated the reusability of OBDCA-sp. The hydrogen bonding was the possible mechanism for TC adsorption. This paper developed the novel surface modification methods of OBDCA-sp and provided an approach for the resource utilization of OBDCA-sp as an environmental functional material.
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MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 9
·1-12
·
IF 6.408
Hu Rong,Yan Yibo,Jiang Long,Huang Chuixiu,Shen Xiantao
An electromembrane microextraction (EME)-assisted fluorescent molecularly imprinted polymer (MIP) sensing method is presented for detecting the total cathinone drugs in urine samples. In this detection system, the clean-up ability of EME eliminated the matrix effects on both target binding with MIPs and the luminescence of the fluorophore in the sensor. Moreover, by optimizing the extraction conditions of EME, different cathinone drugs with a same concentration show a same response on the single aggregation induced emission (AIE) based MIP (AIE-MIP) sensor ( λ ex = 360 nm, λ em = 467 nm). The recoveries were 57.9% for cathinone (CAT) and 78.2% for methcathinone (MCAT). The EME-assisted “light-up” AIE-MIP sensing method displayed excellent performance with a linear range of 2.0–12.0 μmol L −1 and a linear determination coefficient ( R 2 ) of 0.99. The limit of detection (LOD) value for EME-assisted “light-up” AIE-MIP sensing method was 0.3 μmol L −1 . The relative standard deviation (RSD) values for the detection were found to be within the range 2.0–12.0%. To the best of our knowledge, this is the first time that determination of total illicit drugs with a single fluorescent MIP sensor was achieved and also the first utilization of sample preparation to tune the sensing signal of the sensor to be reported. We believe that this versatile combination of fluorescent MIP sensor and sample preparation can be used as a common protocol for sensing the total amount of a group of analytes in various fields. Graphical abstract
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危险品化学品经营许可证（带存储）