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Light-responsive color switching of self-doped TiO_(2-x)/WO_(3)·0.33H_(2)O hetero-nanoparticles for highly efficient rewritable paper

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Nano research 2021年第1期14卷 165-171页

作者： Jingmei Zhao Luntao Liu Yun Zhang Zhenyu Feng Feifei Zhao Wenshou Wang national engineering research Center for colloidal materials and School of Chemistry and Chemical engineering Shandong UniversityJinan 250100China

Smart materials that reversibly change color upon light illumination are widely explored for diverse appealing ***,light-responsive color switching materials are mainly limited to organic *** synthesis of inorganic counterparts has remained a significant challenge because of their slow light response and poor ***,we report a seeded growth strategy for the synthesis of TiO_(2-x)/WO_(3)·0.33H_(2)Ohetero-nanoparticles(HNPs)with networked wire-like structure of〜10 nm in diameters that enable the highly reversible light-responsive color switching *** the TiO_(2-x)/WO_(3)·0.33H_(2)OHNPs,T P species self-doped in TiO_(2-x)nanoparticles(NPs)act as efficient sacrificial electron donors(SEDs)and Ti-O-W linkages formed between TiO2-x and WO30.33H2O NPs ensure the nanoscale interfacial contact,endowing the HNPs enhanced photoreductive activity and efficient interfacial charge transfer upon ultraviolet(UV)illumination to achieve highly efficient color *** TiO_(2-x)/WO_(3)·0.33H_(2)OHNPs exhibits rapid light response(180 times).We further demonstrate the applications of TiO_(2-x)/WO_(3)·0.33H_(2)O HNPs in ink-free,light-printable rewritable paper that can be written on freehand or printed on through a photomask using UV *** work opens an avenue for designing inorganic light-responsive color switching nanomaterials and their smart applications.

关键词： light-response color switching self-doping hetero-nanoparticles rewritable paper

Surface-ligand protected reduction on plasmonic tuning of one-dimensional MoO_(3−x)nanobelts for solar steam generation

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Nano research 2020年第11期13卷 3025-3032页

作者： Xindian Li Dongyang Wang Yun Zhang Luntao Liu Wenshou Wang national engineering research Center for colloidal materials and School of Chemistry and Chemical engineering Shandong UniversityJinan250100China

Sub-stoichiometric MoO_(3−x)nanostructures with plasmonic absorption via creating oxygen vacancies have attracted extensive attentions for many intriguing ***,the synthesis of one-dimensional(1D)plasmonic MoO_(3−x)nanostructures with widely tunable plasmonic absorption has remained a significant challenge because of their serious morphological destruction and phase change with increasing the concentration of oxygen *** we demonstrate a surface-ligand protected reduction strategy for the synthesis of 1D MoO_(3−x)nanobelts with tunable plasmonic absorption in a wide wavelength range from 200 to 2,500 *** glycol(PEG-400)is used as both the reductant to produce oxygen vacancies and the surface protected ligands to maintain 1D morphology during the formation process of MoO_(3−x)nanobelts,enabling the widely tunable plasmonic *** to their broad plasmonic absorption and unique 1D nanostructure,we further demonstrate the application of 1D MoO_(3−x)nanobelts as photothermal film for interfacial solar *** surface-ligand protected reduction strategy provides a new avenue for the developing plasmonic semiconductor oxides with maintained particle morphology and thus enriching their wide applications.

关键词： MoO3−x nanobelts surface-ligand protected reduction oxygen vacancies plasmonic tuning interfacial water evaporation

Si_3N_4 nano-microsphere synthesized by cathode arc plasma and heat treatment

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中国有色金属学会会刊：英文版 2009年第S3期19卷 718-721页

作者：耿中荣闫鹏勋范多旺岳光辉 national engineering research centerfor Technology and Equipment of Green Coating Lanzhou Jiaotong University Institute for Plasma and Metal materials Lanzhou University

The Si3N4 microcrystals with a hollow sphere structure were prepared by using the simple heat treatment of the Si3N4 flakes, which were prepared by using the cathode arc plasma. The products were characterized by XRD, SEM and TEM. The photoluminescence (PL) spectrum of the Si3N4 nano-microsphere was studied. The obtained Si3N4 microcrystals, which show a hollow sphere structure, are up to several nanometers in diameter. During the process, the heat treatment and Ni catalyst play a key role in the forming structure and morphology. This result provides a possibility for mass producing Si3N4 microcrystals.

关键词： Si3N4 hollow sphere heat treatment photoluminescence cathode arc plasma

Temperature-induced lattice distortion in CuGeO_(3) nanocrystals

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Chinese Journal of Structural Chemistry 2023年第7期42卷 17-22页

作者： Yuqing Wang Yuguo Xia Haihua Wang Xiuling Jiao Dairong Chen national engineering research Center for colloidal materials School of Chemistry and Chemical Engineering Shandong UniversityJinan250100China

Lattice distortion represents the fundamental factor of crystalline materials and contributes significantly to structural-related ***,we discover an unexpected temperature-induced lattice distortion in CuGeO_(3) nanocrystals,resulting in color changes of CuGeO_(3).The structural distortions in CuGeO_(3) nanocrystals are characterized by Rietveld analysis in detail,where its cell parameter b and cell volume reveal first decrease and then increase characteristics and correspond well with the XRD patterns and Raman ***,both the experimental characterizations and theoretical calculations confirm that the optical and band structural changes mainly arise from the twisted octahedral field of[CuO_(6)],where the lattice distortions regulate the crystal field splitting energy of[CuO_(6)]and account for its changed d-d ***,tetracycline photodegradation is employed as an example to evaluate the effect of lattice distortion on photocatalytic performance,which also highlights the importance of modulating lattice distortion in *** work provides an approach to simply regulate the lattice distortion for nanorods by manipulating calcination temperatures.

关键词： Lattice distortion CuGeO_(3) Temperature regulation d-d transition Photooxidation

A positively charged silver nanowire membrane for rapid on-site swabbing extraction and detection of trace inorganic explosives using a portable Raman spectrometer

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Nano research 2016年第8期9卷 2487-2497页

作者： Yu-e Shi Wenshou Wang Jinhua Zhan national engineering research Center for colloidal materials and Key Laboratory of Colloid and Interface Chemistry of Ministry ofEducation Department of Chemistry Shandong University Jinan 250100 China

The sensitive and on-site detection of inorganic explosives has raised serious concerns regarding public safety. However, high stability and non-volatility features currently limit their rapid on-site detection. Surface-enhanced Raman spectroscopy （SERS） is emerging as a powerful technique for the trace-level detection of different molecules. Plasmonic Ag nanowires were produced by a hydrothermal synthesis method using polyvinylpyrrolidone （PVP） as a negatively charged stabilizer. Here, we report a rapid detection method for inorganic explosives based on a simple surface swab with a positively charged diethyldithiocarbamate-modified Ag nanowire membrane coupled with SERS. This membrane, serving as an excellent SERS substrate with high uniformity, stability, and reusability, can capture both typical oxidizers in inorganic explosives and organic nitro-explosives, via electrostatic interaction. The detection level of perchlorates （ClO4-）, chlorates （ClO3-）, nitrates （NO3）-, picric acid, and 2,4- dinitrophenol is as high as 2.0, 1.7, 0.1, 45.8, and 36.6 ng, respectively. In addition, simulated typical inorganic explosives such as black powders, firecrackers, and match heads could also be detected. We believe that this membrane represents an attractive alternative for rapid on-site detection of inorganic explosives with high efficiency.

关键词： Ag explosives nanowire surface-enhanced Ramanscattering on-site detection

The study of dry biological valve crosslinked with a combination of carbodiimide and polyphenol

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Regenerative Biomaterials 2021年第1期8卷 83-91页

作者： Li Yang Shuang Xie Kailei Ding Yang Lei YunbingWang national engineering research centerfor Biomaterials Sichuan UniversityNo.29 Wangjiang RoadChengdu 610064China

The glutaraldehyde crosslinked pericardium has been used in bioprosthetic valves for about 50 ***,problems such as glutaraldehyde residue and calcification still exist in current commercial ***-glutar aldehyde crosslinked dry valve is an important strategy to solve those *** this study,a non-glutaraldehyde crosslinked dry biological valve material was obtained by the combined crosslinking of carbodimide(EDC)and *** results showed that the comprehensive properties of EDC and curcumin crosslinked pericardium were superior to glutaraldehyde crosslinked pericardium,including unfolding property,anti-calcification,cytotoxicity,anticoagulant properties,mechanical properties,enzyme degradation resistance and thermal shrinkage *** and curcumin crosslinked dry pericardium could flatten after being folded at 40℃ for 3 days while glutaraldehyde crosslinked pericardium could *** calcification of pericardium treated with EDC and curcumin was 1.21±0.36 mg/g in rats after 60 days'subdermal implantation,much lower than that of glutaraldehyde treated control group(22.06±3.17 mg/g).

关键词： dry biological valve carbodimide polyphe nol non-glutraldehyde

Dynamic micelles with detachable PEGylation at tumoral extracellular pH for enhanced chemotherapy

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Asian Journal of Pharmaceutical Sciences 2020年第6期15卷 728-738页

作者： Guoqing Yan Panpan Zhang Jun Wang Xin Wang Rupei Tang engineering research centerfor Biomedical materials School of Life ScienceAnhui UniversityHefei 230601China

Although surface PEGylation of nanomedicines can decrease serum protein adsorption in vivo,it also blocks uptake by tumor *** dilemma could be overcome by employing detachably PEGylated strategy at tumoral extracellular microenvironment to achieve improved cellular uptake while prolonged circulation ***,the amphiphilic graft copolymers with p H-sensitive ortho ester-linked m PEG in side chains and polyurethanes in backbone,can self-assemble into the free and doxorubicin(DOX)-loaded *** p H-sensitive micelles could undergo several characteristics as follows:(i)PEGylated shells for stability in sodium dodecyl sulfonate(SDS)solution;(ii)De PEGylation via degradation of ortho ester linkages at tumoral extracellular pH(6.5)for gradually dynamic size changes and effective release of DOX;and(iii)enhanced cellular uptake and cytotoxicity via positive ***,the dynamic micelles with detachable PEGylation could quickly penetrate the centers of SH-SY5 Y multicellular spheroids(MCs)and strongly inhibit tumor growth in vitro and in vivo,and might be considered as promising and effective drug carriers in tumor therapy.

关键词： Micelles Ortho ester PEGylation Size transition Antitumor

A new metallization method of modified tannic acid photoresist patterning

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Industrial Chemistry & Materials

Industrial Chemistry & materials 2024年第2期2卷 284-288页

作者： Zicheng Tang Xubin Guo Haihua Wang Huan Chen Wenbing Kang national engineering research Center for colloidal materials School of Chemistry and Chemical EngineeringShandong UniversityJinanShandong province250100China

Metal patterning from a modified tannic acid(TA-Boc-MA)photoresist and the processes are designed using protection of hydroxyl groups in tannic acid,formulation into a photoresist,an exposure and pattern treatment pro... 详细信息

关键词： Tannic acid Positive photoresist Metallization method Metal patterning Ag pattern

Insertion of Supramolecular Segments into Covalently Crosslinked Polyurethane Networks towards the Fabrication of Recyclable Elastomers

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Chinese Journal of Polymer Science 2022年第3期40卷 321-330,I0009页

作者： Lu-Ping Wang Ming-Guang Zhang Jing-Cheng Hao Xu Wang national engineering research Center for colloidal materials School of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education School of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China

Thermoset plastics have become one of the most important chemical products in the world. The consequent problem is that although the thermosets possess excellent performance in mechanical strength, they cannot be reprocessed because of the internal permanent network structures. Optimizing the molecular design of thermosets is one of the most feasible ways to improve their recyclability. Here we present a facile and robust strategy to engineer the reprocessability of thermoset polyurethanes without compromising their mechanical toughness and chemical resistance via adding supramolecular additives during the polymer synthesis process. By using a multiple hydrogen bonding moiety as the model supramolecular additive, we demonstrate that the mechanical properties, recyclability, and chemical resistance of the crosslinked polyurethanes can be precisely controlled by adjusting the contents of the supramolecular additive. Systematic studies on the relations between molecular design and material properties are performed, and the optimized polyurethane network with a moderate amount of the supramolecular additive achieves the right balance between the robustness and recyclability. This work provides a cost-effective and practical way to chemically engineer thermoset plastics, aiming to enable the recycling of mechanically tough and chemically stable polymer materials.

关键词： Thermoset plastics Recyclability Polyurethane Supramolecular additives Chemical resistance