INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Yongjing Xu,Bo Liu,Liming Zou,Chenkai Sun,Wengang Li
In order to achieve the electrospinning of chitosan in common organic solvents, amino-reserved CS-g-PCL was synthesized by one-step method. PLLA and dichloromethane/ethanol (CH 2 Cl 2 /EtOH) solvent were chosen to prepare a series of different compositions of PLLA/CS-g-PCL mats (8/2, 6/4, 4/6, 2/8 wt/wt%) by electrospinning. The SEM showed that the smooth defect-free and uniform nanofibers were collected except PLLA/CS-g-PCL 2/8 and pure CS-g-PCL, and the fiber diameter was decreased from 828 nm to 461 nm with the increasing content of CS-g-PCL. The mechanical properties of composite mats have decreased with increasing CS-g-PCL content, but much higher than neat PLLA. The water contact angle, water absorption rate, water-vapor transmission rate and in vitro degradation behavior were 129°–19°, 109%–482%, 1945–2517 g m −2 day −1 and 4–14%, respectively. The addition of CS-g-PCL imparted PLLA/CS-g-PCL electrospun mats on better properties, improving the nature defects of PLLA. The in vitro cell culture studies showed that PLLA/CS-g-PCL 6/4 exhibited a higher in vitro biocompatibility and a better ability for cell attachment, spreading, and proliferation, comparing with PLLA mats. Herein, PLLA/CS-g-PCL 6/4 electrospun mats with excellent performance, was considered the potential application as wound dressing in skin tissue engineering.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 22
·22244-22258
·
IF 2.8
Yan Xuechao,Zhang Xiaoping,Li Qian
In this paper, an effective chitosan/beta-cyclodextrin/nanometer zinc oxide (CS/β-CD/Nano-ZnO) composite porous membrane was synthesized by sol-gel and polymer-assisted inverting method. Preparation conditions of CS/β-CD/Nano-ZnO were investigated by single-factor and Box-Behnken response surface methodology optimizing triethoxyvinylsilane (JH-V151), beta-cyclodextrin (β-CD), and nanometer zinc oxide (Nano-ZnO), and applied to study the adsorption characteristics of Cong red (CR) from aqueous solution using batch experiments. The optimum preparation conditions were determined that the volume fraction of JH-V151 alcohol solution was 11%, the ratio of β-CD to CS was 5.35, and the ratio of Nano-ZnO’s mass to solution’s volume was 0.36%. Different characterization methods including field-emission scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, UV-visible spectroscopy, and Universal Materials Tester were used to prove the appearance, crystallinity, functional groups, swelling degree, transmittance, and tensile property of CS/β-CD/Nano-ZnO. The optimized batch experimental parameters were 50 mg L −1 , 4 h, 7.0, 0.5 g L −1 , and 55.0 °C as initial concentration, contact time, pH, adsorbent dose, and temperature, respectively. The maximum adsorption capacity on CR reached 96.33 mg g −1 , which is 4.34 times with respect to CS. The batch experimental data were best described by a pseudo-second-order kinetics model and Langmuir isotherm model ( R 2 = 0.9965, theoretical saturated adsorption capacity 147.28 mg g −1 ). The values ∆G were − 2.09, − 4.73, and − 7.37 kJ mol −1 at 298, 308, and 318 K temperatures, respectively. The ∆H value was 76.68 kJ mol −1 , indicating the endothermic and spontaneous adsorption in nature. The ∆S value was 0.26 kJ mol −1 K −1 , a signal of entropy increase during adsorption. The adsorption capacity decreased only by 5.8% after six recycling runs, which indicated the reusability of CS/β-CD/Nano-ZnO. Therefore, the CS/β-CD/Nano-ZnO composite porous membrane is a promising membrane material for the efficient removal of CR from any water at large and economic scales at moderate concentration.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2017
·
IF 9.466
Bin-Wen Liu,Min-Yi Zhang,Xiao-Ming Jiang,Shu-Fang Li,Hui-Yi Zeng,Guo-Qiang Wang,Yu-Hang Fan,Yong-Fei Su,Chunsen Li,Guo-Cong Guo,Jin-Shun Huang
Two new polar polyselenides Rb4Ge4Se12 (1) and Cs4Ge4Se12 (2) with rarely reported dimeric [Ge2Se4(μ-Se2)]4– units were synthesized. They present large second-harmonic generation (SHG) intensities of 7.5 and 6.5 times that of the benchmark AgGaS2 with type I phase-matching behavior, high laser-induced damaged thresholds, a wide transmission region and congruently melting behavior, making them excellent candidates for IR nonlinear optical (NLO) applications. The SHG functional motifs of both compounds are determined to be [Ge2Se4(μ-Se2)]4– unit by time-dependent density functional theory calculation, which further reveals that charge transfers from the lone pairs of terminal Se atoms to the five σ* orbitals of five-membered ring Ge2Se3 have a predominant contribution to the total SHG effect.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 64
·40227-40236
·
IF 3.108
Ran Li,Qing-Da An,Zuo-Yi Xiao,Bin Zhai,Shang-Ru Zhai,Zhan Shi
In view of the sustainable character and high-density of reactive sorption sites, a new kind of poly(ethylenimine)/chitosan (PEI/CS) aerogel beads were successfully synthesized using controllable sol–gel and freeze drying methods, with the aim of using them for efficient Cr(VI) removal from aqueous acid solutions. Compared with the reported CS-based sorbents for hexavalent chromium [Cr(VI)], not only is the synthetic process used simple but the bead-like samples could be easily separated from solutions for recycling. Structural characterization and batch experiments were compared to illustrate the adsorption performance of the aerogel beads which were synthesized using various processes. Out of the three samples (CS–glutaraldehyde (GA), CS–GA–PEI and CS/PEI–GA beads), the one referred to as CS–GA–PEI exhibited the highest adsorption capacity and the maximum amount of Cr(VI) removal was 402.9 mg g−1 at pH 2.0 and 298 K. The pseudo-second-order and Langmuir model preferably fitted the adsorption process best. After five cycles of desorption–regeneration tests, more than 80% of Cr(VI) could still be removed by these newly designed CS–GA–PEI beads. Adsorption mechanisms could be explained using electrostatic attraction and reduction reaction theories, on the basis of comprehensive analysis. More importantly, taking advantage of the micrometer sized particles and three-dimensional network that developed, fixed-bed column tests were also conducted on the resultant bead-like sample, which also exhibited excellent sorption performance under testing conditions. These superiorities of CS–GA–PEI beads make them a potential candidate for use in remediating the pollution caused by Cr(VI) ions.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Orthopaedic Surgery and Research
·
2024
·Vol. 19
·期 1
·1-17
·
IF 2.8
Zhang Yong,Huang Wenliang,Xiao Hongli,Ruan Shiqiang,Deng Jiang
Background With the rapid growth of the ageing population, chronic diseases such as osteoarthritis have become one of the major diseases affecting the quality of life of elderly people. The main pathological manifestation of osteoarthritis is articular cartilage damage. Alleviating and repairing damaged cartilage has always been a challenge. The application of cartilage tissue engineering methods has shown promise for articular cartilage repair. Many studies have used cartilage tissue engineering methods to repair damaged cartilage and obtained good results, but these methods still cannot be used clinically. Therefore, this study aimed to investigate the effect of incorporating nerve growth factor (NGF) into a silk fibroin (SF)/chitosan (CS) scaffold containing bone marrow-derived mesenchymal stem cells (BMSCs) on the repair of articular cartilage defects in the knees of rabbits and to explore the possible underlying mechanism involved. Materials and methods Nerve growth factor-loaded sustained-release microspheres were prepared by a double emulsion solvent evaporation method. SF/CS scaffolds were prepared by vacuum drying and chemical crosslinking. BMSCs were isolated and cultured by density gradient centrifugation and adherent culture. NGF-SF/CS-BMSC composites were prepared and implanted into articular cartilage defects in the knees of rabbits. The repair of articular cartilage was assessed by gross observation, imaging and histological staining at different time points after surgery. The repair effect was evaluated by the International Cartilage Repair Society (ICRS) score and a modified Wakitani score. In vitro experiments were also performed to observe the effect of different concentrations of NGF on the proliferation and directional differentiation of BMSCs on the SF/CS scaffold. Results In the repair of cartilage defects in rabbit knees, NGF-SF/CS-BMSCs resulted in higher ICRS scores and lower modified Wakitani scores. The in vitro results showed that there was no significant correlation between the proliferation of BMSCs and the addition of different concentrations of NGF. Additionally, there was no significant difference in the protein and mRNA expression of COL2a1 and ACAN between the groups after the addition of different concentrations of NGF. Conclusion NGF-SF/CS-BMSCs improved the repair of articular cartilage defects in the knees of rabbits. This repair effect may be related to the early promotion of subchondral bone repair.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Man-Man Chen,Sheng-Hua Zhou,Wenbo Wei,Xin-Tao Wu,Hua Lin,Qi-Long Zhu
Despite the fact that nonlinear optical (NLO) crystals such as AgGaS2 and AgGaSe2 have been widely used in the infrared (IR) range due to their large second harmonic generation (SHG) coefficients and wide range of IR transparency windows, the small laser-induced damage threshold (LIDT) remains a great issue hindering their high-power applications. Herein, three noncentrosymmetric (NCS) chalcogenides AZn4Ga5Se12 (A = K, Rb, or Cs) are successfully obtained through an appropriate flux method after the extensive design and synthesis of the A/Zn/Ga/Q system. Single-crystal X-ray diffraction data demonstrate that they adopt trigonal space group R3 (No. 146) with three-dimensional diamond-like frameworks composed of [M9Se24] layers (M = Zn or Ga) stacking in the same direction and filled by charge-balancing A+ cations. Noticeably, they all exhibit strong powder SHG responses (2.8–3.7 × AgGaS2) and amazing LIDTs (19.2–23.4 × AgGaS2). In addition, theoretical calculations are performed to further determine the relationship between NCS structures and NLO properties. This work provides effective solutions for overcoming the trade-off between strong SHG and high LIDT in IR-NLO materials.
研究领域:
材料科学
·
光学材料
·
非线性光学
·
红外光子学
·
晶体化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121155
·
IF 7.2
Yaqi Liu,Hui Lu,Changfei Gao,Yameng Wang,Haoran Liu,Huiqiang Ma,Bo Wang,Lifen Liu,Yihua Li,Xianbo Chang
The persistent threat posed by radioactive metal contamination necessitates the development of innovative and sustainable remediation strategies. In this study, we proposed a self-sustaining bioelectrocatalytic reduction system (BECRs) incorporating an in situ co-synthesized ternary Fe/Cu/Co@Z-CF cathode derived from zeolite imidazole salt skeleton (ZIF) -functionalized carbon felt. The engineered electrode demonstrated outstanding electrocatalytic performance, characterized by an ultrahigh exchange current density of 7.68 × 10 −3 A cm −2 and minimal charge transfer resistance of 0.11 Ω. These properties were attributed to the synergistic redox cycling of Fe-Cu-Co species and the enhanced exposure of active sites facilitated by the ZIF structure. Under optimized conditions at pH 11, the BECRs achieved removal efficiencies exceeding 98.28 % for targeted radionuclides (Cs + : 99.00 %, Sr 2+ : 98.28 %, Tb 3+ : 99.95 %, Eu 3+ : 99.97 %) while generating a stable bio-voltage of 730 mV. The removal mechanisms operated synergistically through three primary pathways: direct electroreduction of metals to elemental or metallic oxide forms at the catalytic cathode; electroflocculation mediated by in situ formation of Fe(OH) x species and microbial adsorption by enriched pollutant-resistant microbial consortia, notably with a 16.3 % increase in Bacteroidota abundance. Density Functional Theory (DFT) calculations revealed charge complementarity among Fe/Cu/Co sites, accelerating oxygen reduction kinetics. Crucially, the electrode demonstrated negligible metal leaching across pH 3–11, confirming ecological safety. Kinetic analysed distinguish radionuclide-specific pathways: pseudo-first-order for Cs⁺/Sr²⁺ versus pseudo-second-order for Tb 3+ /Eu 3+ , informing selective recovery strategies. This work established a green, energy-positive paradigm for radioactive wastewater treatment, achieving simultaneous decontamination, resource recovery (metallic Cs/Sr/Tb/Eu) with significant potential for closed-loop nuclear effluent management.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xiali Guan,Xinbo Wei,Qian Wang,Bing Chen,Yu Wang,Xiaonan Yang
A crosslinker-free PVA/CS hydrogel with polydopamine-engineered Ag nanoparticles was developed. • The hydrogel shows strong tissue adhesion, mechanical robustness, and self-healing for long-term wound application. • PDA enables sustained Ag⁺ release and stable NIR-responsive photothermal heating. • Ag@PDA0.5 balances antibacterial efficacy, photothermal activity, and cytocompatibility. • NIR-mediated photothermal treatment reduces inflammation and promotes vascularization in MRSA-infected diabetic wounds. Chronic diabetic wounds complicated by multidrug-resistant bacterial infections remain a persistent clinical challenge, requiring advanced wound dressings that integrate effective antibacterial protection with tissue regeneration. Herein, we developed a biocompatible and crosslinker-free hydrogel system composed of polyvinyl alcohol (PVA) and chitosan (CS), integrated with polydopamine-coated silver nanoparticles (Ag@PDA). The PDA coating, together with the hydrogel matrix, regulated Ag + release, thereby maintaining antibacterial activity while reducing silver-associated cytotoxicity. The resulting PVA/CS-Ag@PDA hydrogel exhibited favorable mechanical properties, tissue adhesion, cytocompatibility, antioxidant activity, and broad-spectrum antibacterial efficacy. In vitro and in vivo experiments collectively demonstrated the pro-regenerative and immunomodulatory effects of the hydrogel. In vitro, the hydrogel promoted endothelial cell migration and regulated macrophage inflammatory responses, as evidenced by reduced pro-inflammatory markers and enhanced repair-associated gene expression. In an MRSA-infected diabetic rat wound model, PVA/CS-Ag@PDA treatment suppressed bacterial growth, attenuated inflammatory infiltration, downregulated pro-inflammatory genes including Il6 and Tnf, and upregulated repair-associated genes including Il10 and Mrc1. Moreover, Ag@PDA endowed the hydrogel with concentration-dependent near-infrared (NIR)-triggered photothermal behavior. Among the tested formulations, PVA/CS-Ag@PDA0.5 generated a moderate and stable photothermal response and was selected for NIR-assisted antibacterial treatment. Under NIR irradiation, PVA/CS-Ag@PDA0.5 further enhanced bacterial eradication against MRSA and E. coli . NIR-assisted treatment also reduced CD45 + inflammatory cell infiltration and CD68 + macrophage accumulation, enhanced CD206-associated reparative signaling, and improved epidermal remodeling, collagen deposition. This work presents a rational strategy for engineering silver-based hydrogel dressings with controlled Ag + release, NIR-enhanced antibacterial activity, and improved regenerative efficacy for infected diabetic wound repair. Download: Download high-res image (327KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Chen Chen,Sijie Chen,Yu Zhang,Jinhong Liu,Shenghui Xia,Vishal Chaudhary,Praveen Sekhar,Larry Nagahara,Chao Wang,Hui Zhang,Pengfei Cheng,Pradeep Bhadola,Wei Liu,Thomas Thundat,Zhimin Li,Ajit Khosla
Pristine metal oxide gas sensors often suffer from poor selectivity and limited polarizability. The objective of this work is to overcome these bottlenecks by developing an advanced material tailored specifically for highly sensitive and intelligent NO 2 sensing applications. Consequently, oxygen vacancy-rich 2D ultrathin Cs-doped WO 3-x nanosheets were synthesized via a solvothermal method. KPFM, UPS, and TAS confirmed that optimal Cs doping (0.08 mol%) optimizes the surface work function and drastically prolongs the photo-generated carrier lifetime (
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Junyi Feng,Jiwei Zhang,Mengyi Tang,Xiaodan Zhang,Xiaoshuang Chen,Xuesong Feng,Kaifa Du,Wei Li,Huayi Yin,Bowen Deng,Dihua Wang
Efficient capture and separation of Cs + from nuclear wastewater remains a central challenge in nuclear chemical engineering. Here, a solvent-free solid-state conversion strategy is developed to directionally transform natural kaolinite into sodalite under thermally driven solid-state conditions, yielding a Cs + -selective capture material with intrinsic ion-sieving properties. The resulting sodalite exhibits a high Cs + adsorption capacity of up to 242.96 mg/g in weakly acidic solutions and reaches adsorption equilibrium within approximately 50 min, demonstrating fast uptake kinetics. Isotherm and kinetic analyses demonstrate that Cs + adsorption proceeds via a monolayer, chemisorption-dominated process governed by ion exchange. Multiscale characterization combined with theoretical calculations reveals that Cs + capture arises from the synergistic effects of size-matched pore confinement and spatially confined ion-exchange sites within the sodalite framework. These findings establish kaolinite-derived sodalite as a viable inorganic platform for the efficient separation and long-term management of radionuclides in nuclear wastewater.
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 22
·3931
·
IF 5.719
Weikai Sun,Hongxiang Ou,Ziwei Chen
Adsorption is one of the effective methods of treating dye wastewater. However, the selection of suitable adsorbent materials is the key to treating dye wastewater. In this paper, GO−ATP was prepared by an intercalation method by inserting graphene oxide (GO) into the interlayer of alabaster attapulgite (ATP), and GO−ATP@CS−PVA aerogel was prepared by co−blending−crosslinking with chitosan (CS) and polyvinyl alcohol (PVA) for the adsorption and removal of crystalline violet dye from the solution. The physicochemical properties of the materials are characterized by various methods. The results showed that the layer spacing of the GO−ATP increased from 1.063 nm to 1.185 nm for the ATP, and the specific surface area was 187.65 m2·g−1, which was 45.7% greater than that of the ATP. The FTIR results further confirmed the success of the GO−ATP intercalation modification. The thermogravimetric analysis (TGA) results show that the aerogel has good thermal stability properties. The results of static adsorption experiments show that at 302 K and pH 9.0, the adsorption capacity of the GO−ATP@CS−PVA aerogel is 136.06 mg·g−1. The mass of the aerogel after adsorption−solution equilibrium is 11.4 times that of the initial mass, with excellent adsorption capacity. The quasi−secondary kinetic, Freundlich, and Temkin isotherm models can better describe the adsorption process of the aerogel. The biobased composite aerogel GO−ATP@CS−PVA has good swelling properties, a large specific surface area, easy collection and a low preparation cost. The good network structure gives it unique resilience. The incorporation of clay as a nano−filler can also improve the mechanical properties of the composite aerogel.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2021
·
IF 4.076
Jinhui Wang,Xinyuan Zhang,Fei Liang,Zhanggui Hu,Yicheng Wu
Recently, neutral cyanurate acid and negative (iso-)cyanurates (HxC3N3O3)(3–x)– (x = 0–2) with strong conjugated π-bonds have been proposed as a new possible type of structural motifs for exploring high-performance birefringent materials. Especially, ionic cocrystals (ICCs) with neutral H3C3N3O3 molecules have attracted much attention due to their extended ultraviolet transparent range and concurrently improved birefringence. Herein, three ICC single crystals, RbCl·(H3C3N3O3)2 (I), CsCl·(H3C3N3O3)2 (II), and RbBr·(H3C3N3O3)2 (III), combining cyanurate acid and alkali halides have been designed and synthesized in ethanol solution. They simultaneously exhibit wide band gaps more than 5.4 eV, large birefringence (Δnexp ≈ 0.096–0.115, Δncal ≈ 0.071–0.105 at 800 nm), and high thermal stability above 325 °C. In addition, theoretical calculations have also been performed to evaluate the relationship of the molecular arrangement and their anisotropic optical properties. This work suggests that cyanurate-based cocrystals could be a promising structural family for the discovery of ultraviolet birefringent crystals.
研究领域:
材料化学
·
光学材料
·
晶体工程
·
无机化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）