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Start Over Author "Ding, Xu" Journal angewandte chemie
7 results on '"Ding, Xu"'

5. Hydrogen‐Bonded Organic Framework Ultrathin Nanosheets for Efficient Visible‐Light Photocatalytic CO2 Reduction.

Author

Yu, Baoqiu, Meng, Ting, Ding, Xu, Liu, Xiaolin, Wang, Hailong, Chen, Baotong, Zheng, Tianyu, Li, Wen, Zeng, Qingdao, and Jiang, Jianzhuang

Subjects
PYROLYTIC graphite, PHOTOREDUCTION, NANOSTRUCTURED materials, GRAPHENE oxide, CARBON dioxide reduction
Abstract

Post‐modification of robust guanine‐quadruplex‐linked 2,2′‐pyridine‐containing HOF‐25 with Ni(ClO4)2 ⋅ 6 H2O followed by exfoliation using sonication method affords hydrogen‐bonded organic framework (HOF) nanosheets (NSs) of HOF‐25‐Ni in the yield of 56 %. TEM and AFM technologies disclose the ultrathin nature of HOF‐25‐Ni NSs with thickness of 4.4 nm. STM observation determines the presence of sql segments assembled from HOF‐25‐Ni building blocks at the heptanoic acid/highly oriented pyrolytic graphite interface, supporting the simulated 2D supramolecular framework. ICP‐MS, XAS, and XPS data prove the successful immobilization of atomic nickel sites on the 20 % total 2,2′‐pyridine moieties in crystalline HOF‐25‐Ni. With the aid of [Ru(bpy)3]2+ and triisopropanolamine, 10 wt% HOF‐25‐Ni NSs dispersed on graphene oxide efficiently promotes visible‐light‐driven CO2 reduction, showing a 96.3 % CO selectivity with a prominent conversion rate up to 24 323 μmol g−1 h−1. [ABSTRACT FROM AUTHOR]

Published
2022
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6. Crystal‐Field Tuning of Photoluminescence in Two‐Dimensional Materials with Embedded Lanthanide Ions

Author

Raymond R. Unocic, Tao Zhang, Ding Xu, Haifeng Xue, Yunxu Chen, Weiyin Chen, Kai Xiao, Xiahan Sang, Lei Fu, Mengqi Zeng, and Yao Xiao

Subjects
Lanthanide, Materials science, Photoluminescence, 010405 organic chemistry, Energy level splitting, chemistry.chemical_element, General Chemistry, 02 engineering and technology, General Medicine, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Catalysis, Ion, 0104 chemical sciences, Crystal, chemistry, Chemical physics, Crystal field theory, Europium, Anisotropy, 0210 nano-technology
Abstract

Lanthanide (Ln) group elements have been attracting considerable attention owing to the distinct optical properties. The crystal-field surroundings of Ln ions in the host materials can determine their energy level splitting, which is of vital importance to tailor their optical properties. 2D MoS2 single crystals were utilized as the host material to embed Eu3+ and energy-level splitting was achieved for tuning its photoluminescence (PL). The high anisotropy of the 2D host materials makes them distort the degenerate orbitals of the Ln ions more efficiently than the symmetrical bulk host materials. A significant red-shift of the PL peak for Eu3+ was observed. The strategy for tailoring the energy level splitting of Ln ions by the highly designable 2D material crystal field provides a new method to extend their optical properties.

Published
2017

7. Innentitelbild: Antimonene Quantum Dots: Synthesis and Application as Near-Infrared Photothermal Agents for Effective Cancer Therapy (Angew. Chem. 39/2017)

Author

Si Chen, Wei Tao, Phei Er Saw, Mohammad Ariful Islam, Zameer Bharwani, Han Zhang, Omid C. Farokhzad, Jinjun Shi, Zilei Guo, Xiaoyuan Ji, Xiao-Ding Xu, and Zhongjun Li

Subjects
0301 basic medicine, 03 medical and health sciences, 030104 developmental biology, Materials science, Quantum dot, Near-infrared spectroscopy, Cancer therapy, Nanotechnology, General Medicine, Photothermal therapy
Published
2017

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