Nano-Micro Letters
·
2021
·Vol. 13
·期 1
·1-10
·
IF 16.419
Li Youbing,Ma Guoliang,Shao Hui,Xiao Peng,Lu Jun,Xu Jin,Hou Jinrong,Chen Ke,Zhang Xiao,Li Mian,Persson Per O. Å.,Hultman Lars,Eklund Per,Du Shiyu,Chai Zhifang,Huang Zhengren,Jin Na,Ma Jiwei,Liu Ying,Lin Zifeng,Huang Qing
Small size V 2 SnC MAX phase was prepared by the molten salt method.
V 2 SnC MAX phase electrode is able to deliver high gravimetric capacity up to 490 mAh g −1 and volumetric capacity of 570 mAh cm −3
A charge storage mechanism with V 2 C-Li redox and Sn–Li alloying dual reactions was proposed
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高影响因子
Heritage Science
·
2020
·Vol. 8
·期 1
·1-9
·
IF 1.902
Jia Zhihui,Li Jing,Li Yuhu,Qi Yunpeng,Hu Daodao,Xing Huiping,Chao Xiaolian
Microbubble disease observed in cellulose acetate microfilm is accompanied by the production of vinegar syndrome, which affects the image integrity. In the present study, samples of cellulose acetate microfilm with microbubble disease were selected to investigate potential treatment methods. Samples were sourced from the Republic of China (AD 1912–1949) microfilm collections held in the Second Historical Archives of China. A combination of optical microscopy and a stainless-steel needle was used to remove plasticizer exudation within microbubbles. The plasticizer was effectively removed by infiltrating butan-1-ol into the microbubble from a small hole made by the stainless-steel needle. SEM and confocal microscopy were used to study the morphology and roughness of the internal surface of the microbubbles. It was found that the blurry image could be attributed to light scattering from the rough surface. Ethyl cellulose was used to fill the interior of the microbubble to obtain a clearer image. To determine the protective potential of this filling material, the chemical and mechanical properties of coated film after dry heat, hygrothermal and UV accelerated ageing were measured. Based on the above-mentioned results, it is encouraging that a new microrepair method and its corresponding method are offered in film treatment work.
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Frontiers of Chemical Science and Engineering
·
2024
·Vol. 18
·期 4
·1-10
·
IF 4.3
Guo Huiyan,Li Huaiyu,Zhang Hongzhi,Pan Lun,Shi Chengxiang,Xue Kang,Zhang Xiangwen,Zou Ji-Jun
The aluminum-water system is a promising propellant due to high energy and low signal characteristics, and the gel form is easier to store and utilize. In this work, hydrogels of water and aluminum particles were prepared using the low-molecular-weight gellant agarose. The various physical properties of gel systems, including the water loss rate, phase transition temperature, and centrifugal stability at different gellant and aluminum contents, were examined. Rheological properties were assessed through shear thinning tests, thixotropy tests, strain sweep analysis, and frequency sweep experiments. The microstructure of the gel was obtained through scanning electron microscopy images. The results show that the aluminum-hydrogel network structure is composed of micron-scale aluminum and agarose nanosheets, and the unique micro-nanostructure endows the gel with excellent mechanical strength and thermal stability, which improve with increasing gellant and aluminum contents. Notably, the gel with 2% agarose and 20% aluminum had the best performance; the storage modulus reached 90647 Pa, which was within the linear viscoelastic region, and the maximum withstand pressure was 111.2 kPa, which was 118.8% greater than that of the pure hydrogel. Additionally, the gel demonstrates remarkable shear thinning behavior and can undergo gel-sol transformation upon shearing or heating to exceeding 114 °C.
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WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 3
·140
·
IF 2.9
Li Ruichao,Tian Nini,Jiang Jiantang,Wu Doufeng,Xia Min,Ni Huagang,Ye Peng,Zong Xintong,Zong Liang,Wang Yumei
Fast and efficient removal of organic dyes from industrial wastewater by practical and cost-effective adsorption method has been in the spotlight. Herein, lignosulfonate-based hybrid hydrogel adsorbents (HPAS) were one-pot synthesized via cross-linking reaction with lignosulfonate amine, hyperbranched polyamide amine, and polyethylene glycol diglycidyl ether, then were characterized by FTIR, XPS, and SEM measurements. The adsorption capacity of HPAS for separate organic dyes and metallic ion were further studied. HPAS with hierarchical porous structures showed ultra-high capacity for dye removal, especially for Congo red (CR). The actual maximum adsorption capacity of CR can reach 5120 mg/g, when the initial concentration of CR is 6000 mg/L, natural pH, temperature is 298 K, and the amount of adsorbent HPAS-4 is 0.8 g/L. Simultaneously, HPAS-4 also showed a relatively strong adsorption performance for Cu(II); the maximum uptake capacity was obtained at 249 mg/g (initial Cu(II) concentration = 100 mg/L). After 5 adsorption–desorption cycles, HPAS-4 still maintains a high adsorption capacity for CR and Cu(II). The CR and Cu(II) adsorption mechanisms by HPAS were further validated using X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. The adsorption of CR and Cu(II) by HPAS was a spontaneous endothermic process, which conforms to the pseudo-second-order kinetic model and Langmuir adsorption model. The key mechanism of CR adsorption process is H-bond interactions due to abundant N and O atoms in HPAS accompanied with electrostatic attraction and π-π stacking interaction. The adsorption of Cu(II) on HPAS is mainly determined by the complexation/chelation accompanied with precipitation of copper derivatives on HPAS. The results of this study provide a new method for the preparation of high-performance biomass-based adsorbents in the field of wastewater treatment.
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高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2021
·Vol. 39
·期 8
·975-983
·
IF 3.603
Li Hui-Xian,Hou Lei,Wu Pei-Yi
The time-resolved attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy is employed to investigate the transport mechanism of gel electrolytes by monitoring the diffusion behavior of propylene carbonate-lithium bis(trifluoromethylsulfonyl)imide (PC-LiTFSI) solution through poly(vinylidene fluoride- co -hexafluoropropylene) (P(VDF-HFP)) films. Fickian behavior has been observed for both TFSI − and PC. Higher temperature leads to faster diffusion of TFSI − and PC, which could be related to the increased free volume in P(VDF-HFP) matrix and rapid molecular movements upon heating. Various molecular interactions among LiTFSI, PC and P(VDF-HFP) have been recognized. During the diffusion process, PC molecules, in the form of small clusters, can firstly diffuse through the P(VDF-HFP) film and interact with P(VDF-HFP) by dipole-dipole interaction, acting as the plasticizer. Then, Li + diffuses into P(VDF-HFP) with the help of ion-dipole interactions between Li + and C-O of PC. Meanwhile, TFSI − diffuses through the polymer matrix in solvation states. In addition, slight ion-dipole interactions between Li + and P(VDF-HFP) have been observed as well. Results in this work contribute to a better understanding of transport process in gel polymer electrolytes for lithium-ion batteries and support the development of improved gel polymer electrolytes by rationally regulating molecular interactions.
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高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2024
·Vol. 130
·期 3
·1-11
·
IF 2.5
Hu Jiaming,Han Xiuxun,Zhu Wuzhi,Wu Fangfang,Tan Xiaohui
Incorporating substitutional elements from groups I, II and IV is an important approach to improve the quality of kesterite thin films. Among the elements, Ag and Ge are most effective in promoting the performance of Cu 2 ZnSn(S,Se) 4 solar cells. Although several theoretical and experimental studies have been conducted on the Ag/Ge-alloyed kesterite, there are significant differences in the reported morphological characteristics, photovoltaic performance and even the optimal Ag/Ge substitution ratio due to different preparation processes utilized, which leads to difficulties in comparing the Ag-incorporated and Ge-incorporated kesterite solar cells. Currently, there is little literature on the comparative study concerned. Herein, we fabricated Ag-alloyed and Ge-alloyed kesterite solar cells based on the same solution method and process conditions, and laterally compared the effects of Ag substitution and Ge substitution on the phase compositions, morphologies, optical bandgaps, minority carrier lifetime and device performance of kesterite Cu 2 ZnSn(S,Se) 4 thin films.
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
·Vol. 28
·期 7
·2445-2454
·
IF 2.6
Xu Lihuan,Wang Jianan,Su Chang
Silicon-carbon materials have broad development prospects as negative electrode materials for lithium-ion batteries. In this paper, polyvinyl butyral (PVB)-based carbon-coated silicon (Si/C) composite materials were prepared using PVB-coated Si particles and then high-temperature carbonization methods. Furthermore, the PVB-based carbon-coated silicon/artificial graphite composite materials (Si/C-Gr) were prepared by using artificial graphite as conductive skeleton. And the electrochemical and battery performances of Si/C and Si/C-Gr composite materials as negative electrode materials of lithium-ion batteries were investigated in detail. The results showed that PVB-based carbon was uniformly coated on the surface of silicon particles, and the electrochemical performance and battery performance of the Si/C composite material was improved with the increasing proportion of PVB in the reaction feed. With the introduction of artificial graphite, the constructed ternary composite of Si/C-Gr as anode exhibited a further improved electrochemical performances, such as cycling stability, rate performance, and coulombic efficiency. Specially, the Si/C-Gr (1:30:0.7) composite anode has a discharge specific capacity of 1239.9 mAh/g in the first cycle and 922.9 mAh/g in the 100th cycles at a current density of 0.1 A/g. And the corresponding coulombic efficiency was 84.5% in the first cycle and maintained at around 98% after 100 cycles. The average discharge specific capacity was 1045.5, 796.08, 688.75, 507.09, and 479.11 mAh/g at the current rate of 0.1, 0.2, 0.4, 0.8, and 1 A/g, respectively. This is attributed to the addition of artificial graphite forming an effective conductive skeleton structure, which enhanced the structural stability of the composite material and improved the electronic conductivity of the electrode material. Also, PVB as functional coating polymer improved the dispersion of Si particles on the surface of graphite. All above reasons enabled the electrode materials to have good electrochemical performances.
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高影响因子
Silicon
·
2023
·Vol. 15
·期 16
·6997-7004
·
IF 3.4
Chen Gaopan,Luo Haimei,Zhou Yan,Pan Liyan,Luo Guihai,Pan Guoshun
SiO 2 based slurry was an ideal solution for addressing element pollution in fused silica polishing. However, it was still a huge challenge to enhance polishing efficiency. Herein, lignin was added into colloidal silica to manipulate SiO 2 particles, thereby improving the removal efficiency of fused silica. Specifically, the variations of average particle size ( Z -Average) and polymer dispersity index ( PDI ), -OH groups on particles surface, wettability and viscosity of colloidal silica with addition lignin in the range of 0–5% were introduced. Also, adhesion action and tribological characteristics with and without manipulation in polishing process were studied. Removal mechanism of fused silica using SiO 2 based slurry and the key factors to improve polishing performance were discussed at different content of lignin. Colloidal silica was stable at lignin content of 2%, at which material removal rate ( MRR ) was increased by 216% and surface roughness ( Ra ) achieved 0.118 nm. This study embarked from abrasives variations directly (particles characteristics) and indirectly (colloidal silica) intending to reveal the change of removal mechanism on fused silica polishing. It provided new insights for fused silica polishing definitely.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 11
·16795-16804
·
IF 0
Li Haiyu,Xu Mingze,Zhang Tingsong
The issue of water pollution has emerged as a formidable challenge, prompting a pressing need for solutions. The utilization of metal nanoparticles with surface plasmon resonance and semiconductor composite photocatalysts is regarded as a highly effective approach to solve this problem. g-C 3 N 4 is an effective catalyst for the degradation of organic pollutants. Its photocatalytic performance is usually enhanced by the use of the noble metal Au Ag. However, the high cost of these materials limits their application. In this study, we present the synthesis of Al NPs/g-C 3 N 4 nanocomposites using the bridging effect of ligands. The characterized of transmission electron microscopy (TEM), X-ray diffractometer (XRD) and ultraviolet-visible spectroscopy (UV-Vis) proved that Al NPs/g-C 3 N 4 with a wider light absorption range were successfully synthesized. The effects of ligands, (glutathione (GSH), glutamic acid (GAG), and cysteine (CYS)), Al diameter (40 to 200 nm) and the ratio of Al to g-C 3 N 4 (1:1 to 5:1) on the photocatalytic degradation of methylene blue (MB) by Al NPs/g-C 3 N 4 were also evaluated. The results showed that the optimum degradation efficiency of Al NPs/g-C 3 N 4 for MB at 5 mg/L reached 100% within 60 min, which was 11 times higher than that of pure g-C 3 N 4 . The principal analysis of Al enhancing the photocatalytic performance of g-C 3 N 4 was studied through transient photocurrent spectroscopy (TPC), electrochemical impedance spectroscopy (EIS), and steady-state transient fluorescence spectroscopy (PL). The results confirmed that hot carriers generated by localized surface plasmon resonance (LSPR) of Al nanoparticles increase the carrier concentration. In addition, the Schottky barrier generated by Al and g-C 3 N 4 could also improve the carrier separation rate and increase the carrier lifetime. This work is expected to solve the problem of organic wastewater treatment and lay the foundation for subsequent research on photocatalysis. Graphical abstract
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JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 10
·4354-4365
·
IF 3.5
Liu Chang,Li Ning,Niu Li,Li Xu,Feng Jacko,Liu Zhiming
The crosslinked of hydroxypropyl methylcellulose (HPMC) and sodium alginate (SA) with a range of weight ratios formed blend films. Antibacterial packaging films (HPMC/ZA blend film) were prepared by simple ion exchange method with HPMC/SA blend film. The mixture of Zn 2+ gave a plenty effect of the prepared films. The microstructure, physical properties, structure, and antibacterial properties of crosslinked films were investigated in detail. It was found that the infrared shifted peaks of O–H stretching and O–H bending in crosslinked HPMC/ZA film, which was caused by the formation of hydrogen bond between HPMC and ZA. SEM images of HPMC 5 /ZA 5 blend film exhibited rougher structure. In addition, the light transmission, thermal properties, water vapor permeability, and antibacterial activity of HPMC 5 /ZA 5 blend film are obviously enhanced, compared with HPMC/SA blend film. Furthermore, HPMC 5 /ZA 5 blend film exhibited better antibacterial activity against S. aureus and E. coli , revealing the possible application on food packaging.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 21
·9003-9013
·
IF 3.553
Huang Jiyu,Jiang Jinchun,Hu Liang,Zeng Yiyu,Ruan Shuangchen,Ye Zhizhen,Zeng Yu-Jia
A heterojunction photodetector formed by CuO–Ga (CuGaO) and ZnO–S (ZnSO) thin film has been fabricated by solution combustion synthesis and magnetron sputtering. The band structure of CuGaO/ZnSO heterojunction is studied by using X-ray photoelectron spectroscopy. The valance band offset of CuGaO/ZnSO is calculated to be 0.38 eV by using the Kraut equation. The device shows a responsivity of 3.78 mA/W and a detectivity of 1.16 × 10 10 Jones under 365 nm ultraviolet (UV) illumination, when operated as a self-powered (zero bias) UV photodetector. The average rise and decay times can be calculated as 0.034 s and 0.027 s, respectively. The CuGaO/ZnSO heterojunction is a promising candidate for the application in self-powered UV photodetection.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 30
·74916-74927
·
IF 5.8
Li Libo,Zhang Hongji,Liu Zhiliang,Su Yiguo,Du Chunfang
Environmental-friendly biochar (BC) with low cost was obtained by simple pyrolysis of corn stalk core, which was employed as an adsorbent for efficiently removing organic pollutants in water. The physicochemical properties of BCs were characterized by various techniques, including X–ray diffractometer (XRD), Fourier transforms infrared (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X–ray photoelectron spectrometer (XPS), Raman, Thermogravimetric (TGA), N 2 adsorption–desorption and zeta potential tests. The influence of pyrolysis temperature on the structure and adsorption efficiency of the adsorbent was emphasized. The graphitization degree and sp 2 carbon content of BCs were enhanced by increasing the pyrolysis temperature, which was favorable for the enhancement of the adsorption efficiency. The adsorption results showed that corn stalk core calcined at 900 °C (BC-900) displayed exceptional adsorption efficiency toward bisphenol A (BPA) in wide pH (1–13) and temperature (0–90 °C) ranges. Moreover, adsorbent BC-900 could adsorb various pollutants from water, including antibiotics, organic dyes, and phenol (50 mg·L –1 ). The adsorption process of BPA over BC-900 matched well with the Langmuir isotherm and pseudo-second-order kinetic model. Mechanism investigation suggested that large specific surface area and pore filling acted the foremost role in the adsorption process. Adsorbent BC-900 has the potential application in wastewater treatment due to its simple preparation, low cost, and excellent adsorption efficiency.
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高影响因子
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