JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 59
·期 2
·715-727
·
IF 4.5
Li Bin,Zhou Mengjing,Wu Aolin,Liu Haiying,Du Li,Su Lihua
Preparation of composite hydrogels by in situ polymerization (SP) using choline chloride (ChCl), acrylamide (AM), and urea (U) as raw materials for deep eutectic solvent (DES), with the introduction of PVA and PVDF as fillers into DES. Characterization of the composite hydrogels was conducted using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). This study analyzed the pressure sensitivity, piezoelectricity, swelling behavior, and mechanical properties of the composite hydrogels. The results indicate that due to the dipole–dipole interactions between PVA and PVDF, the composite hydrogels exhibit excellent pressure sensitivity and piezoelectric performance. When the ratio of PVA to PVDF is 1:1, the composite hydrogels exhibit optimal performance, with a 3.37-fold increase in pressure sensitivity and a 6.49-fold increase in piezoelectricity compared to other ratios. This research provides a method for preparing composite hydrogels with excellent piezoelectric performance and pressure sensitivity.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 32
·78279-78293
·
IF 5.8
Arif Muhammad,Liu Guijian,Zia ur Rehman Muhammad,Mian Md Manik,Ashraf Aniqa,Yousaf Balal,Rashid Muhammad Saqib,Ahmed Rafay,Imran Muhammad,Munir Mehr Ahmed Mujtaba
An inexpensive and environmentally friendly composite synthesized from rice husk, impregnated with montmorillonite and activated by carbon dioxide, was investigated for the removal of azithromycin from an aqueous solution. Various techniques were used to characterize adsorbents in detail. The sorption process was primarily regulated by the solution pH, pollutant concentration, contact duration, adsorbent dose, and solution temperature. The equilibrium data were best analyzed using the nonlinear Langmuir and Sips (R 2 > 0.97) isotherms, which revealed that adsorption occurs in a homogenous manner. The adsorption capacity of pristine biochar and carbon dioxide activated biochar-montmorillonite composite was 33.4 mg g −1 and 44.73 mg g −1 , respectively. Kinetic studies identified that the experimental data obeyed the pseudo-second-order and Elovich models (R 2 > 0.98) indicating the chemisorption nature of adsorbents. The thermodynamic parameters determined the endothermic and spontaneous nature of the reaction. The ion exchange, π-π electron-donor–acceptor (EDA) interactions, hydrogen-bonding, and electrostatic interactions were the plausible mechanisms responsible for the adsorption process. This study revealed that a carbon dioxide activated biochar-montmorillonite composite may be used as an effective, sustainable, and economical adsorbent for the removal of azithromycin from polluted water.
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高影响因子
CELLULOSE
·
2024
·Vol. 31
·期 4
·2603-2615
·
IF 4.9
Wang Xinyu,Xu Qingbo,Zhang Junhua,Chen Qian
Conductive cotton fabrics are increasingly used in intelligent wearables and as electromagnetic shielding. Cotton fabrics can be endowed with conductive properties by immobilizing conductive inorganic substances on them or by coating them with conductive polymers; however, cracking of the coating results in a sharp decrease in its conductive properties and limits the applications. To solve this problem, a binder of carboxymethyl chitosan and l -cysteine was used to adhere DNA strands onto the cotton fabric as a “double helix” template for the formation of conductive silver nanoparticle strings. The DNA was used to adsorb silver ions (Ag + ); double-helix strings of silver nanoparticles (Ag NPs) were subsequently synthesized on the cotton fabric on exposure to a reducing agent. As a result of the double-helix structure, the Ag NP strings had a degree of elasticity and the conductive coating on the finished cotton fabric was very stable under the action of external forces. Even the finished fabric after withstand stretching, folding, or bending treatments, the surface resistance did not increase significantly. Finished fabrics prepared using this method therefore have excellent conductive stability, which considerably expands the range of application for conductive cotton fabrics.
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高影响因子
Nano Research
·
2023
·Vol. 16
·期 7
·9625-9632
·
IF 9.9
Yang Linfeng,Feng Yaping,He Zengyi,Jiang Xinyan,Luo Xianfeng,Dai Haoyu,Jiang Lei
In recent years, numerous studies have been reported for oil/water separation, such as superoleophilic materials for oil absorption and underwater superoleophobic membranes for continuous separation. However, for the recovery of oil slick pollution on near-shore ocean surface caused by various reasons, large area and fast availability of used materials are needed to be considered. Herein, we report an efficient and environmentally friendly method to fast process nylon mesh by surface diffuse atmospheric plasma (SDAP) for large-area oil/water separation. Nylon mesh is funcionalized by atmospheric plasma to generate micro/nano composite structures on the surface, resulting in superhydrophilicity and underwater superoleophobicity within only seconds. The pre-wetted modified nylon mesh can achieve high efficiency (> 99.9%) and circulating water flux (∼ 30,000 L·m −2 ·h −1 ), with high intrusion pressure (∼ 3 kPa) and universality in oil/water separation. Regular plasma unconditionally generated in the atmosphere with the merit of efficiently functionalizing surface has the potential of large-area materials treatment. This study might take one step further for large-area industrial oily wastewater recovery and even oil slicks collection in near-shore water bodies.
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高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2024
·Vol. 39
·期 1
·7-16
·
IF 1.3
Xiong Wenhao,Wang Wenbo,Long Yuting,Li Hong
The surface-enhanced Raman scattering (SERS) optical fiber probes were successfully prepared by self-assembling on polyelectrolyte multilayers. Gold nanorods (Au NRs) were used as SERS enhancement material to give excellent biological affinity and stability to the SERS optical fiber probes. Au NRs were synthesized by seed growth method. The synergistic effect between AgNO 3 and surfactant was investigated, and the highest yield was found when AgNO 3 was 500 uL. Meanwhile, different SERS optical fiber probes were obtained by selecting silane coupling agent, polyelectrolyte multilayer and graphene oxide (GO) to treat quartz fiber. It was found that the SERS optical fiber probes obtained by the self-assembled on polyelectrolyte multilayers method performed better than those by other methods. In addition, Mapping was combined with finite element simulation to analyze the electromagnetic field distribution at the fiber end face. The electromagnetic field distribution of Au NRs was investigated, the difference of electromagnetic field intensity around the Au NRs with different arrangements was compared, the strongest signal was obtained when the Au NRs were head-to-head. Finally, sensitivity of the optimized SERS optical fiber probes could reach 10 −9 mol/L, with excellent stability and repeatability.
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2024
·Vol. 416
·期 27
·6091-6102
·
IF 3.8
Zhong Huimin,Jiang Cong,Zou Jiahui,Zhu Guancheng,Cheng Mengyue,Huang Yanyan
Toxic ginkgolic acids (GAs) are a challenge for Ginkgo biloba- related food. Although a detection method for GAs is available, bulky instruments limit the field testing of GAs. Herein, by assembling gold nanoclusters with copper tannic acid (CuTA), CuAuTA nanocomposites were designed as peroxidase mimics for the colorimetric determination of GAs. Compared with single CuTA, the obtained CuAuTA nanocomposites possessed enhanced peroxidase-like properties. Based on the inhibitory effect of GAs for the catalytic activity of CuAuTA nanozymes, CuAuTA could be utilized for the colorimetric sensing of GAs with a low limit of quantitation of 0.17 μg mL −1 . Using a smartphone and the ImageJ software in conjunction, a nanozyme-based intelligent detection platform was developed with a detection limit of 0.86 μg mL −1 . This sensing system exhibited good selectivity against other potential interferents. Experimental data demonstrated that GAs might bind to the surface of CuAuTA, blocking the catalytically active sites and resulting in decreased catalytic activity. Our CuAuTA nanozyme-based system could also be applied to detect real ginkgo nut and ginkgo powder samples with recoveries of 93.12–111.6% and relative standard deviations less than 0.3%. Our work may offer a feasible strategy for the determination of GAs and expand the application of nanozymes in food safety detection. Graphical abstract
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高影响因子
FIBERS AND POLYMERS
·
2023
·Vol. 24
·期 4
·1367-1377
·
IF 2.5
Fang Jin,Meng Chen,Wang Yingfeng,Yang Yi,Han Lun,Wang Shubo,Zhang Guangzhi,Xu Zhenzhen,Min Jie
Recently, the use of natural dyes for simultaneous dyeing and finishing of textiles has become a popular trend with the expanding interest in eco-textiles and environmental-friendly processing techniques. In this study, the natural dye was extracted from biomass lotus seedpod waste, and the effects of temperature, time, and pH as well as a metal mordant on fabric dyeing performance were investigated, and then it was applied to eco-dyeing and functional finishing of cotton fabric together with the bio-mordant chitosan. The dyeing performance and functionality of cotton fabric were characterized through SEM, UV–Vis, Datacolor and indicators such as color strength, color fastness, ultraviolet protection factor, and bacterial inhibition rate. The results showed that the color stability of natural dye was higher under acidic conditions, and the pH had more influence on the dyeing effect of the fabric compared with temperature and time. Though metal mordanting could obtain a higher color strength, it had a certain effect on the color phase of the dyed fabric. SEM showed that cationized chitosan was successfully deposited on the surface of cotton fibers, which improved the dye exhaustion rate of the fabric by reducing the electrostatic repulsion between cotton fibers and dye molecules, thus increasing the color strength ( K/S value of about 4–5 for directly dyed cotton fabric and 7.6446 for chitosan pretreated dyed cotton fabric) and various color fastness (rubbing, washing, saliva, and light fastness were greater than or equal to grade 4). Compared with other fabrics, the chitosan pretreated dyed cotton fabric had a higher ultraviolet protection factor (UPF value = 63.4) and excellent inhibition of E. coli and S. aureus (99.86 and 99.99% initial inhibition, 99.08 and 98.21% after ten cycles of washing). This study provides a new idea for the high-value utilization of biomass waste in textile processing.
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高影响因子
COLLOID AND POLYMER SCIENCE
·
2023
·Vol. 302
·期 1
·43-56
·
IF 2.4
Yu Jinshuo,Zhao Tao,Li Chentao,Pan Hongwei,Tan Zhiyong,Yang Huili,Zhang Huiliang
In this work, polylactic acid/poly (butylene adipate-co-terephthalate) (PLA/PBAT) melt-blown nonwovens with well oil-water separation properties were processed with melt-blown technology. The effects of different contents of PBAT (0, 2, 4, 6, 8, and 10 wt%) on the thermal, crystalline, morphology, mechanical properties, wettability, and oil-water separation performance of the PLA/PBAT melt-blown nonwovens were thoroughly investigated. The result of differential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD) shows that PBAT promotes the movement of the PLA molecular chain and promotes crystallinity. With increasing the blending ratio of PBAT, the degree of crystallinity ( X c ) of PLA was also enhanced from 1.5 to 15.5%, respectively, which was higher than neat PLA. Furthermore, PBAT increases the toughness and hydrophobia of the PLA melt-blown nonwovens. The elongation at break of PLA/PBAT 90/10 (53.3 ± 3.7%) melt-blown nonwovens was 12.3% higher than the neat PLA (41.0 ± 2.9%). The result of the research on the influence of the oil-water separation parameters and oil absorption experiments shows that the 90/10 PLA/PBAT melt-blown nonwoven exhibits the highest hydrophobic (water contact angle is 133.2°). Meanwhile, the oil-water separation efficiency is 96%. The PLA/PBAT melt-blown nonwovens have excellent oil-water separation capability.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 13
·36619-36630
·
IF 5.19
Fan Xiulei,Li Weiyi,Alam Easar,Cao Binwen,Qian Shenwen,Shi Shang,Yang Yangyang
Microplastics (MPs) are widely present in aqueous environments and aged by natural components of complex water environments, such as salinity (SI) and dissolved organic matter (DOM). However, the effects of multicondition aging on the physicochemical properties and environmental behavior of MPs have not been completely investigated. In this study, the degradable MP polybutylene succinate (PBS) was used to investigate the environmental behavior of sulfamethoxazole (SMZ) and was compared with polypropylene (PP). The results showed that the single-factor conditions of DOM and SI, particularly DOM, promoted the aging process of MPs more significantly, especially for PBS. The degrees of MP aging under multiple conditions were lower than those under single-factor conditions. Compared with PP, PBS had greater specific surface area, crystallinity, and hydrophilicity and thus a stronger SMZ adsorption capacity. The adsorption behavior of MPs fitted well with the pseudo-second-order kinetic and Freundlich isotherm models, indicating multilayer adsorption. Compared with PP, PBS showed relatively a higher adsorption capacity, for example, for MPs aged under DOM conditions, the adsorption of SMZ by PBS was up to 5.74 mg/g, whereas that for PP was only 3.41 mg/g. The desorption experiments showed that the desorption amount of SMZ on MPs in the simulated intestinal fluid was greater than that in Milli-Q water. In addition, both the original PBS and the aged PBS had stronger desorption capacities than that of PP. The desorption quantity of PBS was 1.23–1.84 times greater than PP, whereas the desorption rates were not significantly different. This experiment provides a theoretical basis for assessing the ecological risks of degradable MPs in complex water conditions.
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高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 8
·5001-5017
·
IF 5.7
Guo Yan,Wang Yue,Jia Fangting,Li Sihang,Li Sheng,Sarp Sarper,Youravong Wirote,Li Zhenyu
Developing a sustainable separation membrane is imperative due to the growing environmental pollution caused by petrochemical-based polymers. Cellulose-based materials, including bacterial cellulose (BC), have exhibited potential as separation materials. Here, a novel BC membrane (BCM) is in-situ fabricated via microbial fermentation and physical post-treatment. Owing to the randomly assembled BC nanofibers and abundant hydroxyls on their surface, the obtained BCMs possess three-dimensional network structure with strong hydrophilicity. The BCMs properties can be manipulated by adjusting fermentation and drying conditions, satisfying different purposes for practical use. Extending fermentation time from 3 to 10 days, bacteria secret more BC nanofibers and form a denser membrane structure. Freeze-dried BCMs have the most porous structure and exhibit the highest flux (up to 52 L m −2 h −1 ) and molecular weight cut-off (up to 1000 KDa) under 2 bar. Press-dried BCMs obtain the highest tensile strength (up to 241.16 MPa) and BSA retention (up to 94.44%). Heat-dried BCMs show good prospects in the pressure-driven membrane process considering flux and retention and demonstrate favorable stability and flux recovery ratios (85.51%~96.43%). Modification of BCMs by carboxymethyl cellulose further promotes membrane hydrophilicity but causes denser structures than original BCMs. The present study proposes a sustainable cellulose membrane manufacturing strategy and demonstrates BCMs can be favorable alternatives to petrochemical-based membranes.
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高影响因子
Nano Research
·
2023
·Vol. 17
·期 5
·3752-3760
·
IF 9.9
Chong Ben,Xu Baorong,Li He,Ou Honghui,Yang Guidong
The diffusion, adsorption/desorption behaviors of water molecules and hydrogen molecules are of great importance in heterogeneous photocatalytic hydrogen production. In the study of structure–property–performance relationships, nanoconfined space provides an ideal platform to promote mass diffusion and transfer due to their extraordinary properties that are different from the bulk systems. Herein, we designed and prepared a nanoconfined CdS@SiO 2 -NH 2 nanoreactor, whose shell is composed of amino-functionalized silica nanochannels, and encapsulates spherical CdS as a photocatalyst inside. Experimental and simulated results reveal that the amino-functionalized nanochannels promote water molecules’ and hydrogen molecules’ directional diffusion and transport. Water molecules are enriched in the nanocavity between the core and the shell, and promote the interfacial photocatalytic reaction. As a result, the maximized water enrichment and minimized hydrogen-occupied active sites enable photocatalyst with optimized mass transfer kinetics and localization electron distribution on the CdS surface, leading to superior hydrogen production performance with activity as high as 37.1 mmol·g −1 ·h −1 .
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2014
·Vol. 18
·期 7
·1981-1987
·
IF 2.234
Wang Yulin,Li Tianyu,Zhang Weijie,Huang Yaqin
A biosensor with high stability was prepared to determine hydrogen peroxide (H 2 O 2 ). This hydrogen peroxide biosensor was obtained by modifying glassy carbon electrode (GCE) with a composite film composed of gelatin-multiwalled carbon nanotubes. Catalase (Cat) was covalently immobilized into gelatin-multiwalled carbon nanotubes modified GCE through the well-known glutaraldehyde (GAD) chemistry in order to enhance the stability of electrodes. The enzyme sensor can achieve direct electrochemical response of hydrogen peroxide. The cyclic voltammograms at different scan rates, electrochemical impedance spectroscopy (EIS), and scanning electron microscope (SEM) tests indicate that the enzyme sensor performs positively on increasing permeability, reducing the electron transfer resistance, and improving the electrode performance. The linear response of standard curve for H 2 O 2 is in the range of 0.2 to 5.0 mM with a correlation coefficient of 0.9972, and the detection limit of 0.001 mM. A high operational and storage stability is demonstrated for the biosensor. The peak potential at room temperature in two consecutive weeks stays almost consistent, and the enzyme activity is kept stable even after 30 days in further study.
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高影响因子
危险品化学品经营许可证（带存储）