INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
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IF 3.375
Xiling Niu,Fenfen Wang,Xiaohui Li,Rongchun Zhang,Qiang Wu,Pingchuan Sun
Vitrimers are fascinating thermoset polymers to the industry since they can be recycled and reprocessed without compromising their mechanical strength and solvent resistance. Particularly, transesterification reaction in the epoxy resin (ER) vitrimers usually requires the incorporation of a catalyst, whereas most reports only focused on investigating the catalytic effect of small molecules, such as zinc acetate (Zn(OAc)2) and triazabicyclodecene (TBD). In this work, a polymer catalyst, poly(acrylonitrile-co-zinc methacrylate) (Zn-PAM), was synthesized by the random copolymerization of zinc methacrylate and acrylonitrile, where the transesterification catalysis efficiency of Zn-PAM was systematically investigated and compared to that of Zn(OAc)2 and TBD by temperature-dependent stress relaxation experiments. It was revealed that Zn-PAM has a higher catalysis efficiency than Zn(OAc)2 and TBD under the same loading between Zn2+ and TBD. Besides, only a tiny amount of polymer catalyst is needed to efficiently catalyze the transesterification reaction while in the meantime enhance the mechanical properties of ER.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nano Convergence
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2020
·Vol. 7
·期 1
·1-18
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IF 2.919
Cao Dingding,Shu Xugang,Zhu Dandan,Liang Shengli,Hasan Murtaza,Gong Sheng
ZnO nanoparticles are widely used in biological, chemical, and medical fields, but their toxicity impedes their wide application. In this study, pristine ZnO NPs (~ 7 nm; ~ 18 nm; ~ 49 nm) and lipid-coated ZnO NPs (~ 13 nm; ~ 22 nm; ~ 52 nm) with different morphologies were prepared by chemical method and characterized by TEM, XRD, HRTEM, FTIR, and DLS. Our results showed that the lipid-coated ZnO NPs (~ 13 nm; ~ 22 nm; ~ 52 nm) groups improved the colloidal stability, prevented the aggregation and dissolution of nanocrystal particles in the solution, inhibited the dissolution of ZnO NPs into Zn2+ cations, and reduced cytotoxicity more efficiently than the pristine ZnO NPs (~ 7 nm; ~ 18 nm; ~ 49 nm). Compared to the lipid-coated ZnO NPs, pristine ZnO NPs (~ 7 nm; ~ 18 nm; ~ 49 nm) could dose-dependently destroy the cells at low concentrations. At the same concentration, ZnO NPs (~ 7 nm) exhibited the highest cytotoxicity. These results could provide a basis for the toxicological study of the nanoparticles and direct future investigations for preventing strong aggregation, reducing the toxic effects of lipid-bilayer and promoting the uptake of nanoparticles by HeLa cells efficiently.
研究领域:
纳米技术
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材料科学
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生物医学工程
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毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Chemistry
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2022
·
IF 7.613
S. Zhang,Y. Liu,J. Yin,X. Zhang,Y. Li,L. Su,Z. Zhou,M. Xia
Plant factory, a new agricultural planting technology, has emerged and rapidly grown in recent years, with phosphor conversion light emitting diodes (pc-LEDs) considered as the first choice of source light for the plant factory. In this study, a new type of Cr 3+ -activated Li 2 MgTi 3 O 8 phosphor (LMT: Cr 3+ ) was synthesized by high temperature solid state method. X-Ray diffraction patterns showed that there was no detectable impurity in these samples. The photoluminescence spectra revealed that this phosphor can emit far-red light with the peak at 740 nm excited by ultraviolet and blue light, overlapped well with the P FR . After introducing Zn 2+ ions (LMT: Cr 3+ , Zn 2+ ), the luminescence intensity increases by 46% mainly due to the increase of lattice distortion, and internal quantum yield was improved from 25.4% to 41.3% under 365 nm excitation. Finally, the pc-LED devices, consisting of 470 nm chip coated with the optimal phosphor, exhibited good luminescence and overlapping with P FR . These results indicate that the LMT: Cr 3+ , Zn 2+ phosphor has the potential application in modern agriculture.
研究领域:
材料科学
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光电技术
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农业技术
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植物生理学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Chen Ze,Wang Tairan,Wu Zhuoxi,Hou Yue,Chen Ao,Wang Yanbo,Huang Zhaodong,Schmidt Oliver G.,Zhu Minshen,Fan Jun,Zhi Chunyi
The high redox potential of Zn 0/2+ leads to low voltage of Zn batteries and therefore low energy density, plaguing deployment of Zn batteries in many energy-demanding applications. Though employing high-voltage cathode like spinel LiNi 0.5 Mn 1.5 O 4 can increase the voltages of Zn batteries, Zn 2+ ions will be immobilized in LiNi 0.5 Mn 1.5 O 4 once intercalated, resulting in irreversibility. Here, we design a polymer hetero-electrolyte consisting of an anode layer with Zn 2+ ions as charge carriers and a cathode layer that blocks the Zn 2+ ion shuttle, which allows separated Zn and Li reversibility. As such, the Zn ‖ LNMO cell exhibits up to 2.4 V discharge voltage and 450 stable cycles with high reversible capacity, which are also attained in a scale-up pouch cell. The pouch cell shows a low self-discharge after resting for 28 days. The designed electrolyte paves the way to develop high-voltage Zn batteries based on reversible lithiated cathodes.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Haiyang Li,Menglei Wang,Xinyu Lei,Boyou Hu,Hanlu Zhang,Yutong Xing,Meng Zhang
Aqueous zinc-ion batteries (AZIBs) can benefit from a deep understanding of the electrochemical reaction mechanism of cathode materials, which can assist in resolving issues such as cathode dissolution and electrostatic interactions. We reported a straightforward two-step synthesis of polydopamine coated MnO 2 (MnO 2 @PDA) and revealed the energy storage mechanisms in AZIBs. The layered structure of MnO 2 creates a generous passage for the insertion of H + /Zn 2+ ions. Simultaneously, the plethora of functional groups within PDA exerts a robust desolvation effect, bolstering the transfer rate of H + /Zn 2+ . This effect significantly enhances the overall efficiency and performance of cathode. The AZIBs, incorporating MnO 2 @PDA cathode material, consequently exhibit a satisfactory cycling capacity (412 mAh g −1 at 0.1 A g −1 ) and a superb specific energy (561.6 Wh kg −1 at 136.34 W kg −1 ). This work provides a new path for design strategies and catalytic mechanisms of MnO 2 @PDA cathode.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2019
·
IF 13.903
Jing Wang,Huimin Wang,Hong Wang,Shizhen He,Ruomeng Li,Zhao Deng,Xiaoqing Liu,Fuan Wang
The development of self-assembled DNA nanomedicine requires a facile and accurate DNA degradation strategy for precisely programmable drug release. Conventional DNA catabolic strategies are restrained with the fragile and unclear enzymatic reactions that might lead to inefficient and uncontrollable digestion of DNA scaffolds and thus might bring undesirable side effects to the sophisticated biosystems. Herein we reported a versatile self-sufficient DNAzyme-driven drug delivery system consisting of the rolling circle polymerized DNAzyme–substrate scaffolds and the encapsulated pH-responsive ZnO nanoparticles (NPs). The full DNAzyme nanosponges (NSs) were also encoded with multivalent tandem aptamer sequences to facilitate their efficient delivery into cancer cells, where the acidic endo/lysosomal microenvironment stimulates the dissolution of ZnO into Zn2+ ions as DNAzyme cofactors and therapeutic reactive oxygen species generators. The supplement Zn2+ cofactors mediated the nonviolent DNAzyme-catalyzed cleavage of DNA scaffolds for precise and efficient drug administrations with synergistically enhanced therapeutic performance. The facile design of DNAzyme, together with their cost-effective and intrinsic robust features, is anticipated to provide extensive insights for the development of DNA-based therapeutic platforms by activating the specific intracellular biocatalytic reactions. As an intelligent and nonviolent self-driven drug delivery platform, the present DNAzyme NS system could be engineered with more therapeutic sequences and agents and was anticipated to show exceptional promise and versatility for applications in biomedicine and bioengineering.
研究领域:
纳米技术
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药物递送系统
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癌症治疗
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分子生物学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）