Materials Chemistry Frontiers
·
2020
·Vol. 4
·期 9
·2646-2654
·
IF 6.788
Haihui Wang,Xiaohui Zhu,Yuling Yang,Chengyun Chen,Qianying Lin,Yu He,Xiaofei Yin,Chunhua Lu,Huanghao Yang
The self-assembly of hollow organic frameworks has been a focal point in nanotechnology for several decades. Herein, we emphasized a general and simple system to fabricate an arbitrary type of hollow multilayer heterogeneous organic framework. The hollow organic framework nanospheres comprising black phosphorus quantum dots (BPQD), carbon nitride, and polydopamine (PDA) (PDA@g-C3N4/BPQD) are fabricated using an electrostatic bonding method. Surprisingly, the self-assembly process of PDA@g-C3N4 is not completely in accordance with the law of charge interactions, only positively charged g-C3N4 and negatively charged PDA can self-assemble to obtain the desired structure. Furthermore, BPQD was further loaded onto the surface of PDA@g-C3N4 to increase light utilization and strengthen the charge separation in the photochemical process. Benefiting from the hierarchical structure and the hollow spherical morphology, the PDA@g-C3N4/BPQD shows a significant photocatalytic H2 production activity and the ability to generate reactive oxygen species (ROS) upon triggering with near infrared (NIR) light. This method provides a proof-of-concept of an organic framework with a precisely controlled morphology.
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CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Wenqiang Liu,Xuguang Liu,Pingping Zhang,Zhiyi Wang,Xia Li,Maocong Hu
Nano-sized plate-like alumina is an important inorganic material in catalytic, ceramic and electronic applications due to its unique two-dimensional structure and properties, while its facile synthesis is still under investigation. In this work, nano-sized alumina plate was synthesized by solution combustion method with glycine and polyvinyl alcohol as composite fuels for the first time. The calcination temperature during solution combustion process was optimized as confirmed by XRD , FT-IR, TG-DSC, Raman, 27 Al MAS NMR, SEM, TEM, and N 2 physisorbtion. Obtained alumina displayed special nano-sized plate morphology and porous structure. It was further adopted as support for cobalt acetate and used as catalyst for selective oxidation of cyclohexane. This work develops a facile approach to synthesize two-dimensional plate-like alumina for catalytic application.
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Environmental Science-Nano
·
2022
·Vol. 9
·期 8
·2979-2989
·
IF 9.473
Juan Zhang,Yating Wang,Yuan Wang,Xiaofeng Shuai,Ruihua Zhao,Umsalama Abuelgasim Abubakr Yasin,Tianyu Guo,Jianping Du,Jinping Li
2D bismuth molybdate nanosheets with tunable shape and size were synthesized by a surfactant-assisted hydrothermal method and their photocatalytic performances were investigated. The characterization results show that bismuth molybdate materials consist of regular nanosheets that were self-assembled from uniform nanoparticles, and their sizes can be controlled by optimizing the synthesis conditions. The results of photocatalytic degradation indicate that the as-synthesized bismuth molybdate material exhibits excellent photocatalytic activity and good degradation rate of multi-pollutants under visible light irradiation. Notably, the degradation rates of ciprofloxacin and phenol reached 99.4% and 78.6% within 120 min, respectively, and the maximum reaction rate constants increased by 20 times compared to that of bismuth molybdate nanosheets with larger size, which is mainly attributed to the narrow energy gap and outstanding photoelectrochemical properties and improvement of charge separation efficiency of nanoparticles. As-synthesized bismuth molybdate nanosheets are expected to be a potential candidate for the degradation of multi-pollutants in actual environmental remediation.
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Frontiers in Nutrition
·
2022
·
IF 6.59
Zhu Yulian,Liu Keshan,Yuen Michael,Yuen Tina,Yuen Hywel,Peng Qiang
Sea buckthorn peel is the by-product of the sea buckthorn processing, which contains many bioactive compounds. In this paper, sea buckthorn high methoxyl pectin (SBHMP) was obtained, with a yield of 8% and a light-colored. The SBHMP was a high methoxyl with a degree of esterification of 57.75% and uronic acid content of 65.35%. The structural and morphological characterization of SBHMP were analyzed by high-performance liquid chromatography, Fourier-transform infrared spectroscopy, and scanning electron microscopy. Results showed that SBHMP presented a sheet and layered stacked morphological, and was mainly composed of galacturonic acid, arabinose, galactose, rhamnose, and mannose, which indicated that SBHMP mainly consisted of homogalacturonan (HG) and rhamnogalacturonan-I (RG-I) type pectin polysaccharides. In addition, SBHMP also presented significant gel, thickening, and emulsifying properties. The results exhibited that SBHMP could form jelly-like gels under acid and high sucrose conditions, presenting a shear-thinning behavior and increasing apparent viscosity with the enhancement of pectin and sucrose contents. Besides, SBHMP could form oil-in-water emulsions with pectin concentrations of 1.0–3.0%. When the SBHMP concentrations were 2.0 and 3.0%, the emulsions were stable during 7 days of storage. Findings in this paper demonstrated the potential of SBHMP to be a food thickener and emulsifier and support the in-depth utilization of sea buckthorn by-products.
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PubMed
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2017
·
IF 1.795
Wen-Xian Chen,Xiang Zhou,Yi-Fen Gao,Qiu-Ping Liu,Gui-Lin Zhuang
A series of lanthanide-based coordination polymers (Ln2(CBOB)2(OX)·H2O, where Ln = Gd (1), Eu (2), Pr (3), and Tb (4); CBOB = 4-[(4′-carboxybenzyl)oxy]benzoate; OX = oxalate), were obtained from the reaction of H2OX, H2CBOB, and Ln(NO3)3 with the metal salts. Single-crystal measurements show that both 1 and 2 feature unique 3-D structures with the [Ln(COO)n(C2O4)m] layers connected by CBOB ligands. Moreover, 1, 3, and 4 are antiferromagnetic and 2 and 4 display obvious luminescence emission peaks. Furthermore, quantum Monte Carlo (QMC) simulations and the experimental results reveal that the magnetic coupling parameters of adjacent Gd(III) ions in 1 are −0.026(2) and −0.0069(3) cm─1.
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JOURNAL OF MEMBRANE SCIENCE
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2018
·
IF 6.578
Shuwen Yu,Shichun Li,Yu Liu,Sheng Cui,Xiaodong Shen
Microporous polymers possessing good processability and low cost show promising applications for large-scale industrial membrane separation . The relatively low gas selectivity and physical aging of microporous polymer membranes are current challenges which become more serious for ultrathin membranes. Crosslinking is an effective way to improve gas selectivity and physical aging resistance of glassy polymers , and the cross-linked ultrathin membranes can be directly produced by interfacial polymerization (IP). However, there are only a few reports of IP formed microporous polymer membranes, and the reported gas separation performance is not satisfying. In this work, ultrathin microporous polyarylate (PAR) membranes were prepared by IP of 5,5′,6,6′-tetrahydroxy-3,3,3′,3′-tetramethylspirobisindane (TTSBI) and trimesoyl chloride (TMC). The crosslinking structure, molar ratio of TTSBI to TMC ( n (TTSBI) / n (TMC) ) in PAR, and membrane thickness characterized by zeta potential measurements, X-ray photoelectron spectroscopy and scanning electronic microscope were optimized by adjusting IP parameters such as pH value of aqueous phase that decides the hydrolysis of both TTSBI and TMC in IP, and the concentrations of TTSBI and TMC. The microporous structures of PAR characterized by CO 2 adsorption are highly relevant to the n (TTSBI) / n (TMC) in PAR. The resulted membranes exhibit CO 2 permeance in a wide range of 100–2115 GPU with CO 2 /N 2 selectivity of 45–21 that is a remarkable improvement in gas separation performance of IP formed microporous polymer membranes and also shows significant advantages over other reported ultrathin microporous polymer membranes. In addition, the membranes also exhibit excellent stability, and only 29% decrease in CO 2 permeance was observed after 180 h aging. This work provides an effective strategy to fabricate high-performance and stable microporous polymer membranes by IP, which is expected to push the particle applications of microporous polymer membranes in gas separation.
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SEPARATION SCIENCE AND TECHNOLOGY
·
2012
·
IF 1.088
Jie-Ping Fan,Jing Cao,Xue-Hong Zhang,Jun-Zhong Huang,Tao Kong,Sheng Tong,Zhe-You Tian,Jian-Hang Zhu,Xiao-Kun Ouyang
Various ionic liquid-based aqueous two-phase systems (IL-ATPS) were evaluated to extract puerarin. The results indicated that the nature of ILs, the salting-out ability of salt, and the acidity and basicity of the salt-rich solution had important influence on the extraction efficiency. Various factors were optimized systematically, that is, the amount of IL, salt, puerarin, and short-chain alcohol. Under the optimal experimental conditions (the amount of K2HPO4 0.30–0.42 g/mL, [Bmim]Br 0.30–0.36 g/mL and 1.0 mL puerarin stock solution), the extraction efficiency of puerarin was over 99% by a single-step extraction, which indicated that the evaluated IL-ATPS was a prospective extraction medium. Finally, the IL-ATPS was successfully used to extract puerarin from Radix Puerariae Lobatae extracts.
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Scientific Reports
·
2024
·Vol. 14
·期 1
·1-11
·
IF 3.8
Wei Zhengyu,Shen Zhisen,Deng Hongxia,Kuang Tairong,Wang Jinggang,Gu Zhipeng
Using three-dimensional (3D) printing technology to make the porous tantalum plate and modify its surface. The physicochemical properties, cytocompatibility, antioxidant capacity, and histocompatibility of the modified materials were evaluated to prepare for the repair of craniomaxillofacial bone defects. The porous tantalum plates were 3D printed by selective laser melting technology. Tantalum plates were surface modified with a metal polyphenol network. The surface-modified plates were analyzed for cytocompatibility using thiazolyl blue tetrazolium bromide and live/dead cell staining. The antioxidant capacity of the surface-modified plates was assessed by measuring the levels of intracellular reactive oxygen species, reduced glutathione, superoxide dismutase, and malondialdehyde. The histocompatibility of the plates was evaluated by animal experiments. The results obtained that the tantalum plates with uniform small pores exhibited a high mechanical strength. The surface-modified plates had much better hydrophilicity. In vitro cell experiments showed that the surface-modified plates had higher cytocompatibility and antioxidant capacity than blank tantalum plates. Through subcutaneous implantation in rabbits, the surface-modified plates demonstrated good histocompatibility. Hence, surface-modified tantalum plates had the potential to be used as an implant material for the treatment of craniomaxillofacial bone defects.
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PubMed
高影响因子
Small
·
2023
·
IF 13.3
Bolun Lu,Qiuyu Zhao,Zhengwei Cai,Shutong Qian,Jiayi Mao,Liucheng Zhang,Xiyuan Mao,Xiaoming Sun,Wenguo Cui,Yuguang Zhang
The cellular functions, such as tissue-rebuilding ability, can be directly affected by the metabolism of cells. Moreover, the glucose metabolism is one of the most important processes of the metabolism. However, glucose cannot be efficiently converted into energy in cells under ischemia hypoxia conditions. In this study, a high-energy intermediate fructose hydrogel (HIFH) is developed by the dynamic coordination between sulfhydryl-functionalized bovine serum albumin (BSA-SH), the high-energy intermediate in glucose metabolism (fructose-1,6-bisphosphate, FBP), and copper ion (Cu 2+ ). This hydrogel system is injectable, self–healing, and biocompatible, which can intracellularly convert energy with high efficacy by regulating the glucose metabolism in situ. Additionally, the HIFH can greatly boost cell antioxidant capacity and increase adenosine triphosphate (ATP) in the ischemia anoxic milieu by roughly 1.3 times, improving cell survival, proliferation and physiological functions in vitro. Furthermore, the ischemic skin tissue model is established in rats. The HIFH can speed up the healing of damaged tissue by promoting angiogenesis, lowering reactive oxygen species (ROS), and eventually expanding the healing area of the damaged tissue by roughly 1.4 times in vivo. Therefore, the HIFH can provide an impressive perspective on efficient in situ cell energy supply of damaged tissue.
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PubMed
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jiandong Han,Kexin Zhang,Zilong Rao,Jiaxin Chen,Yue Meng,Daping Quan,Ying Bai
There have been great technical challenges in preparation of a transparent polymeric thin film with Janus-type antifouling and bioadhesive properties on both surfaces, while maintaining the optical and mechanical characteristics of the bulk material. Herein, poly(2-hydroxyethyl methacrylate) (PHEMA), which is commonly used as an ophthalmic hydrogel, was employed as the bulk material for allowing consecutive surface grafting of functional polymer brushes, which eventually resulted in a Janus-type transparent thin film for potential biomedical implantation. First, a bromine-containing reagent served as the reactive initiator was silanized onto both surfaces of the PHEMA hydrogel thin film under a mild condition. Then, with the presence of selected physical shielding on one side using a scotch tape, polymer brushes with cell-adhesive Arg-Gly-Asp (RGD) peptide pendent groups were grafted from the other side of the PHEMA thin film, resulted in a highly improved cell attachment capability. Once the tape was removed and the RGD-modified surface was shielded, the zwitterionic polymer brushes comprising poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC) segments were grafted on the surface, again through surface-initiated activators regenerated by electron transfer atom-transfer radical polymerization (SI-ARGET-ATRP). Hence, this side of the PHEMA film became super hydrophilic and exhibited antifouling properties on the surface. After the surface grafting modification, the whole PHEMA hydrogel maintained highly transparent and biocompatible for potential ophthalmic applications. This study provides a simple and rather universal strategy for fabricating Janus-type polymeric thin films with distinct biophysical/biochemical properties on both sides, which potentially applicable for the multifunctional requirements in biomedical applications.
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Acta Biomaterialia
·
2022
·
IF 10.633
Heshi Liu,Caina Xu,Meng Meng,Shuang Li,Shu Sheng,Sijia Zhang,Weidong Ni,Huayu Tian,Quan Wang
Because of molecular heterogeneity in tumors, clinical outcomes of tumor treatment are not very satisfactory, and novel strategies are therefore needed to address this challenge. Combination therapy could efficiently enhance tumor treatment by stimulating multiple pathways, reducing the systemic toxicity of monotherapy , and regulating the tumor immune microenvironments. Herein, metal-organic framework MIL-100 (Fe) nanoparticles (NPs) were synthesized by a microwave-assisted method, and oxaliplatin (OXA) and indocyanine green (ICG) were then loaded into hyaluronic acid (HA)-modified MIL-100 NPs to obtain multifunctional nanoparticles (OIMH NPs). The OIMH NPs exhibited sensitive photoacoustic imaging (PAI) for imaging-guided therapy and showed a good synergistic effect by combining chemotherapy with photothermal therapy (PTT) to kill tumor cells. Immunogenic cell death (ICD) and activation of T cells induced by the chemo-photothermal therapy could sensitize for immune checkpoint blockade (aPD-L1) response, thus eliciting systemic antitumor immunity. Finally, tumor inhibition was observed, which could be attributed to the combination of chemotherapy, PTT, and aPD-L1. On the basis of the study findings, an innovative imaging-mediated combined therapeutic strategy involving multifunctional NPs was proposed, which might potentially offer a new clinical treatment for colorectal cancer . Statement of significance The metal-organic framework-mediated chemo-photothermal therapy guided by photoacoustic imaging (PAI) is an accurate and effective approach for tumor inhibition, which can synergistically achieve immunogenic cell death and lead to an increasing infiltration of immune cells in the tumor microenvironment , thereby enhancing the sensitivity for immune checkpoint blockade (aPD-L1) therapy. This type of therapy can not only reduce the systemic toxicity caused by traditional treatment methods, but it can also solve the issue of low response of immune checkpoint blockade in colorectal cancer (CRC). Our study provides experimental evidence for using the combination of immunotherapy and chemo-photothermal therapy against CRC.
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BIOMEDICAL CHROMATOGRAPHY
·
2023
·Vol. 37
·期 5
·e5594
·
IF 1.8
Yunqian Feng,Pan Zhang,Yaxin Yang,Zhiwei Wang,Guoyong Luo,Wude Yang
Itea ilicifolia Oliv is a folk medicine with antioxidant potential. In this study, the fingerprints of 14 batches of I. ilicifolia were established by HPLC with 17 common peaks. The similarities evaluated by Similarity Evaluation System for Chromatographic Fingerprint of Chinese Materia (version 2012) were >0.89. Ten compounds were identified with definite structures by comparing the retention time and characteristic UV spectral pattern with those of reference substances. The antioxidant capacities of 14 batches of I. ilicifolia were evaluated based on O 2 · − , DPPH and ABTS · + radical scavenging assays in combination with ferric reducing antioxidant power assay. Via multivariate statistical analyses of gray relation analysis, bivariate correlation analysis and partial least squares regression analysis, a study on the spectrum–effect relationship was then performed to screen eight peaks as the antioxidant Q-markers of I. ilicifolia . The contents of representative antioxidant Q-markers (isoorientin, orientin, vitexin, isovitexin and iteafuranal A) in samples were accurately determined to be 0.054–0.118%, 0.034–0.080%, 0.018–0.055%, 0.031–0.091% and 0.033–0.140%, respectively. The qualitative and quantitative analytical method based on Q-markers helps to control the antioxidant quality of I. ilicifolia , which will lay the foundation to promote the rational utilization of I. ilicifolia in curing diseases related to oxidative stress.
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危险品化学品经营许可证（带存储）