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639 results on '"Peng, Qiuming"'

157. Nano-selenium and its nanomedicine applications: a critical review

Author

Hosnedlova,Bozena, Kepinska,Marta, Skalickova,Sylvie, Fernandez,Carlos, Ruttkay-Nedecky,Branislav, Peng,Qiuming, Baron,Mojmir, Melcova,Magdalena, Opatrilova,Radka, Zidkova,Jarmila, Bjørklund,Geir, Sochor,Jiri, and Kizek,Rene

Subjects
International Journal of Nanomedicine
Abstract

Bozena Hosnedlova,1 Marta Kepinska,2 Sylvie Skalickova,3 Carlos Fernandez,4 Branislav Ruttkay-Nedecky,3 Qiuming Peng,5 Mojmir Baron,1 Magdalena Melcova,6 Radka Opatrilova,3 Jarmila Zidkova,6 Geir Bjørklund,7 Jiri Sochor,1 Rene Kizek2,3 1Department of Viticulture and Enology, Faculty of Horticulture, Mendel University in Brno, Lednice, Czech Republic; 2Department of Biomedical and Environmental Analyses, Faculty of Pharmacy, Wroclaw Medical University, Wroclaw, Poland; 3Central Laboratory, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic; 4School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen, UK; 5State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, People’s Republic of China; 6Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Czech Republic; 7Council for Nutritional and Environmental Medicine, Rana, Norway Abstract: Traditional supplements of selenium generally have a low degree of absorption and increased toxicity. Therefore, it is imperative to develop innovative systems as transporters of selenium compounds, which would raise the bioavailability of this element and allow its controlled release in the organism. Nanoscale selenium has attracted a great interest as a food additive especially in individuals with selenium deficiency, but also as a therapeutic agent without significant side effects in medicine. This review is focused on the incorporation of nanotechnological applications, in particular exploring the possibilities of a more effective way of administration, especially in selenium-deficient organisms. In addition, this review summarizes the survey of knowledge on selenium nanoparticles, their biological effects in the organism, advantages, absorption mechanisms, and nanotechnological applications for peroral administration. Keywords: nanoparticles, biomedicine, drug delivery, oxidative stress, anticancer effect, antimicrobial activity, protective effect

Published
2018

178. Fabrication of hierarchical SrTiO3@MoS2 heterostructure nanofibers as efficient and low-cost electrocatalysts for hydrogen-evolution reactions.

Author

Zhang, Lun, Yin, Juanjuan, Wei, Kuo, Li, Bingfan, Jiao, Tifeng, Chen, Yan, Zhou, Jingxin, and Peng, Qiuming

Subjects
HYDROGEN evolution reactions, ELECTROCATALYSTS, PLATINUM catalysts, ENERGY shortages, THRESHOLD energy, NANOFIBERS, OVERPOTENTIAL
Abstract

The construction of low-cost, high-performance electrocatalysts instead of platinum catalysts is critical to solving the energy crisis. Here, using simple electrospinning and hydrothermal methods, new MoS2 nanosheets on SrTiO3 nanofibers (NFs) and 2D SrTiO3@MoS2 heterostructure NFs are synthesized. In addition, SrTiO3@MoS2 heterostructure NFs are compared with bare SrTiO3 NFs and MoS2 nanosheets. Importantly, the prepared SrTiO3@MoS2 heterostructure shows better hydrogen-evolution reaction performance than other MoS2-based electrocatalysts with an overpotential of 165 mV at 10 mA cm−2, a Tafel slope of 81.41 mV dec−1, and long-term electrochemical durability of 3000 cycles. Therefore, the present work strongly demonstrates the positive synergy between SrTiO3 NFs and layered MoS2, and also provides a strategy for preparing low-cost and high-activity water-decomposition electrocatalysts. [ABSTRACT FROM AUTHOR]

Published
2020
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179. Facile preparation of a self-assembled Artemia cyst shell–TiO2–MoS2 porous composite structure with highly efficient catalytic reduction of nitro compounds for wastewater treatment.

Author

Zhao, Jianxun, Yin, Juanjuan, Zhong, Jinling, Jiao, Tifeng, Bai, Zhenhua, Wang, Sufeng, Zhang, Lexin, and Peng, Qiuming

Subjects
CATALYTIC reduction, NITRO compounds, COMPOSITE structures, WASTEWATER treatment, ARTEMIA
Abstract

The catalytic reduction of nitro compounds is currently a hot research area, how to efficiently and stably degrade such toxic and harmful substances has become the research goal of many researchers. In this work, an Artemia cyst shell (ACS)–TiO2–MoS2 ternary porous structure was proposed and prepared as a catalyst for the reduction of 2-nitroaniline (2-NA) and 4-nitrophenol (4-NP). The ACS has a large number of porous structures, exhibits a good binding ability with TiO2 and MoS2, and provides a large number of active sites for the catalytic reduction process. The obtained composite material has a good reduction effect on 4-NP and 2-NA, with a good stability and recyclability, which is obviously higher than the reduction effect of ACS–TiO2 and MoS2 under the same conditions. This work provides ideas for the design of porous catalytic materials. [ABSTRACT FROM AUTHOR]

Published
2020
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190. Ceramic nanowelding

Author

Zhang, Liqiang, primary, Tang, Yushu, additional, Peng, Qiuming, additional, Yang, Tingting, additional, Liu, Qiunan, additional, Wang, Yuecun, additional, Li, Yongfeng, additional, Du, Congcong, additional, Sun, Yong, additional, Cui, Lishan, additional, Yang, Fan, additional, Shen, Tongde, additional, Shan, Zhiwei, additional, and Huang, Jianyu, additional

Published
2018
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