CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Mingran Zhou,Wenda Dong,Ao Xu,Zhiwen Yin,Zhi-Yi Hu,Xinling Wang,Liang Wu,Lihua Chen,Yu Li,Bao-Lian Su
Lithium-selenium batteries (LSeBs) have attracted increasing attention due to their excellent electronic conductivity and high theoretical specific capacity. However, there are still difficult problems such as low utilization rate and fast capacity decay in the actual application process. Herein, a surface iodine modified three-dimensional (3D) nano hollow carbon fiber (I-NHCF) network is designed and synthesized as Se host (Se@I-NHCF) for highly stable LSeBs. The surface iodine species induce the formation of robust cathode electrolyte interface (CEI), thus preventing the transformation of amorphous selenium to low-activity crystalline selenium and enabling stable electrochemical performance. Moreover, the surface iodine species promote rapid charge transfer, enhancing the chemical reaction kinetics and improving the utilization of the active Se species. As a result, the Se@I-NHCF cathode exhibits superior specific capacity of 581.8 mAh g −1 with a high stability (0.0054% capacity decay per cycle) after 500 cycles at 1C, and an excellent rate performance of 567.6 mAh g −1 at 2C. This work addresses the problem of rapid capacity decay by the formation of uniform and robust CEI to conserve highly reactive amorphous Se species, improve Se utilization, and achieve ultra-stable Li-Se batteries with high energy and long cycle life.
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FOOD RESEARCH INTERNATIONAL
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2023
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IF 8.1
Wenjiang Dong,Qidi Hong,Jinhuan Cheng,Hongyan He,Yanan Li,Rongsuo Hu,Yuzhou Long
Green coffee oil (GCO) extracted from green coffee beans, is known for its antioxidant and anticancer properties, and has been increasingly utilised in cosmetic and other consumer products. However, lipid oxidation of GCO fatty acid components during storage may be harmful to human health, and there remains a need to understand the evolution of GCO chemical component oxidation. In this study, proton nuclear magnetic resonance ( 1 H and 13 C NMR) spectroscopy was used to investigate the oxidation status of solvent-extracted and cold-pressed GCO under accelerated storage conditions. Results show that the signal intensity of oxidation products gradually increased with increasing oxidation time, while unsaturated fatty acid signals gradually weakened. Five different types of GCO extracts were clustered according to their properties, except for minor overlapping in the two-dimensional plane of the principal component analysis. Partial least squares-least analysis results demonstrate that oxidation products ( δ = 7.8–10.3 ppm), unsaturated fatty acids ( δ = 5.28–5.42 ppm), and linoleic acid ( δ = 2.70–2.85 ppm) in 1 H NMR can be used as characteristic indicators of GCO oxidation levels. Furthermore, the kinetics curves of unsaturated fatty acids, linoleic, and linolenic acyl groups all fit an exponential equation with high coefficients of GCO for 36 days under accelerated storage conditions. Our results show that the current NMR system is a fast, easy-operated and convenient tool for the oxidation process monitoring and quality control of GCO.
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PROGRESS IN ORGANIC COATINGS
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2022
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IF 6.206
Hui Li,Shiwei Li,Qing Li,Guoqiang Chen,Yan Zhao,Yingjie Cai
Covalent bonding and self-healing ability offer superhydrophobic coating high durability, however, the barrier to the migration and self-healing is obvious due to its covalent network and high glass transition (T g ) temperature. In this work, we design a novel strategy for incorporating covalent adaptable networks of disulfide bonds into superhydrophobic surfaces by coating cotton fabric for its mechanical robustness and processability, which is based on enzyme etching and subsequent oxidation coupling of sulfhydryl alkyl silane (MPTES) and (mercaptopropyl)methylsiloxane-dimethylsiloxane copolymers (S-PDMS). The super water-repellency is durable enough even after 25 cycles of repeated accelerated washing or 2000 cycles of Martindale abrasion. The dynamic adjustment of covalent adaptable networks of disulfide bonds happens upon heat stress, which allows lower temperature (90 °C) for the self-healing on superhydrophobicity. The grafting of MPTES and disulfide coupling reaction make the route available to other substrates. Such a novel way for preparing covalent adaptable networks may promote the development of durable functional coatings and routine maintenance.
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Inorganic Chemistry Frontiers
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2022
·Vol. 10
·期 4
·1119-1126
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IF 7.779
Xin Zhao,Chensheng Lin,Shunda Yang,Haotian Tian,Chao Wang,Tao Yan,Jian Zhang,Bingxuan Li,Ning Ye,Min Luo
A non-centrosymmetric metal-free thiophosphate, γ-P4S3I2, was successfully synthesized utilizing polymorphism strategy in this study. γ-P4S3I2 crystallized in the space group of P43 and featured paralleled (P4S3I2)n molecular clusters. Importantly, it exhibited promising nonlinear optical (NLO) performances, such as a phase-matchable second harmonic generation (SHG) efficiency (0.5 × AgGaS2), wide band gap (2.38 eV), large birefringence (0.118@2050 nm), and wide infrared transparency, suggesting that γ-P4S3I2 may be a potential IR NLO candidate.
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Micromachines
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2022
·Vol. 14
·期 1
·45
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IF 3.523
Zhou Lan,Yangcheng Lu
The combination of microstructural units is an effective strategy to improve the micromixing of liquid phase systems, especially viscous systems. However, how the microstructural combination influences micromixing is still not systematically investigated. In this work, the Villermaux/Dushman reaction is used to study the micromixing performance of the viscous system of the glycerol–water in the combination of a T-type micromixer and a micropacked bed. Micromixing performances under various structural parameters and fluid characteristics are determined and summarized, and the micromixing laws are revealed by dimensionless analysis considering the specific spatial characteristics and temporal sequence in the combined microstructures. It achieves good agreement with experimental results and enables guidance for the design and scaling-up of the combined T-type micromixer and micropacked bed towards micromixing intensification in viscous reaction systems.Keywords:micromixing;micropacked bed;microstructual combination;viscous system
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ENERGY & FUELS
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2023
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IF 5.3
Meng Chen,Yingnan Duan,Fang chen,Wei Zheng,Wanliang Yang,Mengkui Tian
In this study, a series of Pd-supported black phosphorus–graphene (Pd/BP-G) catalysts are prepared to explore their electrocatalytic performances in the electrooxidation of ethanol in alkaline media. The characterization results show that BP is combined with activated graphene to form a P–C bond and a P–O–C bond heterojunction. Pd nanoparticles equally anchor on the BP-G hybrid, and Pd/BP-G exhibited enhanced electrocatalytic activity for the ethanol oxidation reaction in alkaline media. The electrochemically active surface area and mass activity for the Pd/BP-G catalyst reached 210.4 m2·gPd–1 and 3960.0 mA·mgPd–1, which are 9.54 and 5.86 times higher than those of commercial Pd/C, respectively. Further studies show that Pd/BP-G catalysts have reliable stabilities and faster reaction kinetics. These results indicate that the prepared Pd/BP-G catalysts have great application potentials in direct ethanol fuel cells.
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Small
·
2023
·Vol. 19
·期 17
·2207312
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IF 13.3
Jie Fu,Jun Liu,Lin Yuan,Qi Pan,Shuhua Chen,Yiqi Hu,Jinxing Chen,Wanli Ma,Qiao Zhang,Zeke Liu,Muhan Cao
All-inorganic lead halide perovskite nanocrystals (NCs) emerge as a rising star in photovoltaic fields on account of their excellent optoelectronic properties. However, it still remains challenging to further promote photovoltaic efficiency due to the susceptible surface and inevitable vacancies. Here, this work reports a 3D/2D core/shell perovskite heterojunction based on CsPbI 3 NCs and its performance in solar cells. The guanidinium (GA + ) rich 2D nanoshells can significantly passivate surface trap states and lower the capping ligand density, resulting in improved photoelectric properties and carrier transport and diminished nonradiative recombination centers via the hydrogen bonds from amino groups in GA + ions. Consequently, an outstanding power conversion efficiency (PCE) of up to 15.53% is realized, substantially higher than the control device (13.77%). This work highlights the importance of surface chemistry and offers a feasible avenue to achieve high-performance perovskite NCs-based optoelectronic devices.
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JOURNAL OF MOLECULAR STRUCTURE
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2022
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IF 3.841
Jinkui Teng,Lulu Yue,Bilian Li,Jianmei Yang,Cuiting Yang,Tong Yang,Xiangye Zhi,Xiaoqing Liu,Yan Zhao,Jin Zhang
Nanocarrier systems including the lipid-based, silica nanoparticle (NP)-based, chitosan-based, cyclodextrin (CD)-based, and so forth were prepared based on the various stimulus containing redox, pH, temperature, enzymes, etc. The nanocarriers with dual stimuli-responsive properties can meet further practical and clinical applications due to their highly accurate and controllable response to the lesion site, good drug release effect, and weak side effects. Here, a temperature/enzyme-responsive nanocarrier was prepared based on seven-[6-(diaminodipropylamine)-6-deoxy] -β-CD (SA-β-CD) and lauroyl choline chloride (LCC). The SA-β-CD/LCC NPs showed trapping and releasing properties for the antitumor drug celastrol (CSL) in the synergy of the temperature/enzyme stimuli. Notably, the release rate of CSL-trapped NPs reached 94%, which is a relatively high value in numerous drug delivery systems using CSL as a drug model. Furthermore, cytotoxicity and apoptosis tests suggested that CSL-trapped NPs exhibited similar activity to intact CSL on five tumor cells. The dual response nanocarriers may pave a possible way for effectively targeted releasing anti-cancer drugs.
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Science Bulletin
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2023
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IF 18.9
Chen Li,Haoxuan Sun,Min Wang,Shan Gan,Da Dou,Liang Li
Perovskite solar cells offer great potential as a sustainable power source for distributed electronic devices that operate indoors. However, the impact of advanced lighting technology , especially the widely used pulse width modulation (PWM) technology, on perovskite photovoltaics has been ignored. Herein, for the first time in photovoltaics, we find that the light impact emitted by the PWM lighting system caused dynamic strain in perovskite thin films , induced phase separation, and accelerated the generation of metallic lead (Pb 0 ) defects, leading to irreversible degradation of the cell performance after 27 h ( T 80 ). To address this issue, formamidinium triiodide (FAI 3 ) is chosen to treat the surface of the perovskite and release residual stress, resulting in reduced lattice deformation during dynamic strain processes. Meanwhile, it suppresses harmful Pb 0 defects and reduces V oc loss at low light intensity . The champion device achieves impressive power conversion efficiency (PCE) of 35.14% and retains 99.5% of the initial PCE after continuous strobe light soaking for 2160 h.
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LANGMUIR
·
2023
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IF 3.9
Jiaxin Cao,Siyihan Duan,Qian Zhao,Guangyuan Chen,Zeru Wang,Ruixi Liu,Lin Zhu,Tao Duan
The effective capture and deposition of radioactive iodine in the spent fuel reprocessing process is of great importance for nuclear safety and environmental protection. Three-dimensional (3D) fiber felt with structural diversity and tunability is applied as an efficient adsorbent with easy separation for iodine capture. Here, a bismuth-based silica aerogel fiber felt (Bi@SNF) was synthesized using a facile hydrothermal method. Abundant and homogeneous Bi nanoparticles greatly enhanced the adsorption and immobilization of iodine. Notably, Bi@SNF demonstrated a high capture capacity of 982.9 mg/g by forming stable BiI3 and Bi5O7I phases, which was about 14 times higher than that of the unloaded material. Fast uptake kinetics and excellent resistance to nitric acid and radiation were exhibited as a result of the 3D porous interconnected network and silica aerogel fiber substrate. Adjustable size and easy separation and recovery give the material potential as a radioactive iodine gas capture material.
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Journal of Inorganic and Organometallic Polymers and Materials
·
2023
·Vol. 33
·期 10
·3237-3246
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IF 4
Zhu Xiaokang,Wang Xiuwu,Zhou Guiyang,Yin Hong,Qi Dongming,Deng Hangjun,Chen Tao
The preparation of polymer-metal complex is an effective way to achieve the bifunctionality of polymer and metal. In this study, temperature-sensitive polymer was synthesized from triethylene glycol methyl ether methacrylate (MEO 2 MA) and methacrylic acid N-hydroxysuccinimide ester (NMS) monomers via reversible addition-fragmentation chain transfer (RAFT) polymerization. 6-Aminohexanoic acid was introduced into the temperature-sensitive polymer using an activated ester strategy to obtain branched carboxyl-containing polymers. The carboxyl group in the polymer was coordinated with Fe(III), resulting in temperature-sensitive polymer-based iron complexes. The obtained iron complexes were used as homogeneous catalysts in the Fenton oxidation. Where, 97% and 96% decolorization of rhodamine B (RhB) and methylene blue (MB) could be achieved within 2 h for P(COOH 10 - co -MEO 2 MA 41 )-Fe 3+ , and the catalytic activities increased with the increase of the COOH content of polymer. In addition, the recycling of the catalyst can be achieved by the heating-centrifugal precipitation method using the temperature-sensitive nature of the polymer. Graphical Abstract
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Antioxidants
·
2023
·Vol. 12
·期 7
·1473
·
IF 7
Mengqi Xu,Pengcheng Meng,Hongyan Wang,Jun Liu,Tao Guo,Zhenjie Zhu,Yanlan Bi
A novel antioxidant containing four hydroxyl groups, namely 2,2′-(2-methylpropane-1,3-diyl)bis(hydroquinone) (MPBHQ), was synthesized using hydroquinone and methylallyl alcohol as the raw materials, phosphoric acid as the catalyst, and toluene as the solvent system. The structure of MPBHQ was characterized by mass spectrometry, nuclear magnetic resonance, ultraviolet spectroscopy, and infrared spectroscopy. The results showed that MPBHQ has a good radical scavenging effect, as measured by the ORAC assay, DPPH radical scavenging assay, ABST radical scavenging assay, and Rancimat test. In fatty acid methyl ester and lard without exogenous antioxidants, MPBHQ showed better antioxidant performance than butylated hydroxytoluene (BHT), hydroquinone (HQ), tert-butyl hydroquinone (TBHQ), and propyl gallate (PG), meeting the need for a new antioxidant with better properties to ensure the oxidative stability of lipids and biodiesel.Keywords:tetrahydroxyl-phenol antioxidants;synthesis and purification;free radical scavenging;lipid antioxidant
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