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h-BN/NiS₂/NiS composites 1

Cr(VI) reduction 1

degradation of RhB 1

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expandable mechanism 1

graphene-like h-BN 1

homohedra 1

homothety 1

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mechanism design 1

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polyhedral linkages 1

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Polyhedral linkages obtained as assemblies of planar link groups

GÖkhan KİPER, Eres SÖYLEMEZ

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 1, Pages 3-9 doi: 10.1007/s11465-013-0363-6

Abstract:

The study aims to devise means of obtaining polyhedral linkages for homothetic deployment of polyhedralshapes by embedding planar link groups in faces of the polyhedral shape of interest.The questions of which polyhedral shapes may be suitable for such a purpose and what are the compatibilityHomohedral and tangential polyhedral shapes are found to be suitable for the task and some examples oflinkages are worked out.

Keywords： polyhedral linkages homothety homohedra tangential polyhedra

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Facile generation of highly durable thiol-functionalized polyhedral oligomeric silsesquioxane based superhydrophobic

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 8, Pages 1247-1258 doi: 10.1007/s11705-021-2124-0

Abstract: First, 1H, 1H, 2H-perfluoro-1-hexene reacted with thiol-functionalized polyhedral oligomeric silsesquioxanevia the thiol-ene click chemistry to obtain a fluorinated thiol-functionalized polyhedral oligomeric

Keywords： superhydrophobic melamine foam thiol-functionalized polyhedral oligomeric silsesquioxane durable oil

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Synthesis of Intermittent-Motion Linkages with Slight Difference in Length Between Links

CHEN Xin-bo, YU Zhen

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 1, Pages 76-79 doi: 10.1007/s11465-005-0007-6

Abstract:

The design of intermittent-motion linkages using traditional methods is usually complicated.In this paper, (1) a new method for realizing intermittent motion, using linkages with a slight differencein length between links, is studied; (2) some new types of intermittent-motion linkages and their softwareconfirmed that the theory and the software are useful, making the synthesis of intermittent-motion linkages

Keywords： synthesis useful intermittent intermittent-motion traditional

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Graphene-like -BN supported polyhedral NiS/NiS nanocrystals with excellent photocatalytic performance

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6, Pages 1537-1549 doi: 10.1007/s11705-021-2094-2

Abstract: Human health is deteriorating due to the effluent containing heavy metal ions and organic dyes. Hence, photoreduction of Cr(VI) to Cr(III) and degradation of rhodamine B (RhB) using a novel photocatalyst is particularly important. In this work, h-BN/NiS₂/NiS composites were prepared via a simple solvothermal method and a double Z-scheme heterojunction was constructed for efficiently removing RhB and Cr(VI). The 7 wt-% h-BN/NiS₂/NiS composites were characterized via a larger specific surface area (15.12 m²·g^–1), stronger light absorption capacity, excellent chemical stability, and high yield of electrons and holes. The experimental result indicated that the photoreduction efficiency of the 7 wt-% h-BN/NiS₂/NiS photocatalyst achieved 98.5% for Cr(VI) after 120 min, which was about 3 times higher than that of NiS₂/NiS (34%). However, the removal rate of RhB by the 7 wt-% h-BN/NiS₂/NiS photocatalyst reached 80%. This is due to the double Z-scheme heterojunction formed between NiS₂/NiS and h-BN, which improved the charge separation efficiency and transmission efficiency. Besides, the influence of diverse photogenerated electron and hole scavengers upon the photoreduction of Cr(VI) was studied, the results indicated that graphene-like h-BN promoted transportation of photoinduced charges on the surface of the h-BN/NiS₂/NiS photocatalyst via the interfacial effects.

Keywords： graphene-like h-BN h-BN/NiS₂/NiS composites photocatalysis Cr(VI) reduction degradation of RhB

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Design and locomotion analysis of two kinds of rolling expandable mobile linkages with a single degree

Yanlin HAO, Yaobin TIAN, Jianxu WU, Yezhuo LI, Yan-An YAO

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 3, Pages 365-373 doi: 10.1007/s11465-020-0585-3

Abstract: This study presents two kinds of rolling robots that are able to roll by deforming their outer shapes with a single degree of freedom. Each robot is an essential multi-loop planar expandable linkage constructed by a concave outer loop and several inner parallelogram loops. In this study, the mechanical design of the robots is introduced. Dynamic rolling process is further analyzed on the basis of zero moment point method, and a morphing strategy is proposed to guarantee a stable dynamic rolling process. A novel passive rolling locomotion is also developed, which enables the robots to roll and stand on a slope. To verify the design, two prototypes are manufactured, wherein the dynamic and passive rolling locomotion are carried out.

Keywords： rolling locomotion expandable mechanism mechanism design zero moment point (ZMP) analysis