Shan He

University of the Basque Country

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Min Wei

Beijing University of Chemical Technology

David G. Evans

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Xue Duan

Beijing University of Chemical Technology

Yufei Zhao

Beijing University of Chemical Technology

Yanyan Wang

Chinese Academy of Sciences

Guiju Zhang

Beijing Technology and Business University

Shanyue Guan

Technical Institute of Physics and Chemistry

Wei Pang

Tianjin University

Xuexin Duan

Tianjin University

Chang Ming Li

Suzhou University of Science and Technology

Cooperative Institutions

Chinese Academy of Sciences

Beijing University of Chemical Technology

Tianjin University

Harbin Institute of Technology

Peking University

Beijing Technology and Business University

Zhejiang University

Chinese PLA General Hospital

South China University of Technology

University of Chinese Academy of Sciences

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Exploiting Co Defects in CoFe-Layered Double Hydroxide (CoFe-LDH) Derivatives for Highly Efficient Photothermal Cancer Therapy

ACS Applied Materials & Interfaces (2020)

Li Wang Simin Xu Xueting Yang Shan He Shanyue Guan

Currently, two-dimensional materials are being actively pursued in catalysis and other fields due their abundance of defects, which results in enhanced performance relative to their bulk defect-free counterparts. To date, the exploitation of defects in two-dimensional materials to enhance photothermal therapies has received little attention, motivating a detailed investigation. Herein, we successfully fabricated a series of novel CoFe-based photothermal agents (CoFe-x) by heating CoFe-layered double hydroxide (CoFe-LDH) nanosheets at different temperatures (x) between 200–800 °C under a Ar atmosphere. The CoFe-x products differed in their particle size, cobalt defect concentration, and electronic structure, with the CoFe-500 product containing the highest concentration of Co2+ defects and most efficient photothermal performance under near-infrared (NIR, 808 nm) irradiation. Experiments and density functional theory (DFT) calculations revealed that Co2+ defects modify the electronic structure of CoFe-x, narrowing the band gap and thus increasing the nonradiative recombination rate, thereby improving the NIR-driven photothermal properties. In vitro and in vivo results demonstrated that CoFe-500 was an efficient agent for photothermal cancer treatment and also near-infrared (NIR) thermal imaging, magnetic resonance (MR) imaging, and photoacoustic (PA) imaging. This work provides valuable new insights about the role of defects in the rational design of nanoagents with optimized structures for improved cancer therapy.

Photothermal effect

Rational design

Thermal Treatment

10.1021/acsami.0c14147

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Citations (57)

Metal Phosphides Derived from Hydrotalcite Precursors toward the Selective Hydrogenation of Phenylacetylene

ACS Catalysis (2015)

Yudi Chen Changming Li Junyao Zhou Shitong Zhang Deming Rao

We report a new synthetic strategy for the fabrication of several supported nickel phosphides (Ni12P5, Ni2P, and NiP2) with particle size ranging from 5 to 15 nm via a two-step procedure: preparation of supported Ni particles from layered double hydroxide precursors, followed by a further reaction with a certain amount of red phosphorus. The selective hydrogenation of phenylacetylene over these metal phosphides was evaluated, and the as-prepared Ni2P/Al2O3 catalyst shows a much higher selectivity to styrene (up to 88.2%) than Ni12P5/Al2O3 (48.0%), NiP2/Al2O3 (65.9%), and Ni/Al2O3 (0.7%) catalysts. EXAFS and in situ IR measurements reveal that the incorporation of P increases the bond length of Ni–Ni, which imposes a key influence on the adsorption state of alkene intermediates: as the Ni–Ni bond length extends to 0.264 nm, the alkene intermediate undergoes di-π(C═C) adsorption, facilitating its desorption and the resulting enhanced selectivity. Moreover, electron transfer occurs from Ni to P, as confirmed by EXAFS, XPS, and in situ CO-IR experiment, in which the positively charged Ni reduces the desorption energy of alkene and thus improves the reaction selectivity.

Phenylacetylene

Alkene

Hydrotalcite

10.1021/acscatal.5b01429

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Citations (142)

Enhanced low-temperature activity of CO2 methanation over highly-dispersed Ni/TiO2 catalyst

Catalysis Science & Technology (2013)

Jie Liu Chang Ming Li Fei Wang Shan He Hao Chen

The sustainable development of carbon recycling has attracted considerable attention from the viewpoint of the environment and resources. Herein, Ni nanoparticles (NPs) immobilized on a TiO2 support were synthesized via a deposition–precipitation method followed by a calcination–reduction process (denoted as Ni/TiO2-DP), which can be used as a promising heterogeneous catalyst towards CO2 methanation. Transmission electron microscope (TEM) images show that Ni NPs are highly dispersed on the TiO2 surface (particle size: 2.2 nm), with a low Ni–Ni coordination number revealed by the hydrogen temperature programmed desorption (H2-TPD) and extended X-ray absorption fine structure (EXAFS) techniques. Moreover, the catalyst with a Ni loading of 15 wt% exhibits excellent catalytic behavior towards CO2 methanation (conversion: 96%; selectivity: 99%) at a reaction temperature as low as 260 °C. The good dispersion of Ni NPs with large unsaturation facilitates a high exposure of active sites, which accelerates the formation of surface-dissociated hydrogen and the subsequent hydrogenation removal of surface nickel carbonyl species, accounting for the resulting enhanced low-temperature catalytic performance.

Methanation

10.1039/c3cy00355h

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Citations (267)

l-Lysine-Based Gelators for the Formation of Gels in Water and Alcohol–Water Mixtures

Gels (2022)

Yue Miao Jieying Zhang Guiju Zhang Shan He Baocai Xu

Nα, Nε-diacyl-l-lysine and its derivatives are excellent candidates to be used as gelators for the formation of various gels, such as hydrogels, organogels or oleogels, and ionogels. A series of alkali metal salts (Na+ and K+) of four Nα, Nε-diacyl-l-lysines (acyl including octanoyl, decanoyl, lauroyl and myristoyl) were used to study the gelation behaviors in water and alcohol-water mixtures. l-lysine-based derivatives with long-chain acyl can act as gelators to gel water and alcohol-water mixtures. In contrast, octanoyl and decanoyl derivatives cannot form gels in all solvent systems. Gelation ability, rheological behavior, and morphology vary with the molecular structure of the gelator and the nature of the solvents, as hydrophobic interaction and hydrogen bonding are responsible for the formation of gels. In general, sodium salts performed better in forming gels than their corresponding potassium salts, and myristoyl derivatives were beneficial for gel formation. Although it is challenging to form gels in t-butanol-water mixtures, the formed gels show high mechanical strength.

10.3390/gels9010029

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Citations (2)

Highly efficient photothermal heating via distorted edge-defects in boron quantum dots

Journal of Materials Chemistry B (2020)

Li Wang Simin Xu Shanyue Guan Xiaozhong Qu Geoffrey I. N. Waterhouse

Quantum dots (QDs) are increasingly being utilized as near infrared (NIR) active photothermal agents for cancer diagnosis and therapy, with the main emphasis of current research being the enhancement of photothermal conversion efficiencies.

10.1039/d0tb01873b

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Citations (19)

Plasmon mediated spectrally selective and sensitivity-enhanced uncooled near-infrared detector

Journal of Colloid and Interface Science (2020)

Quanquan Guo Xiaoyu Wu Xuexin Duan Shan He Wei Pang

Nanorod

Surface Modification

Localized surface plasmon

10.1016/j.jcis.2020.10.070

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Citations (7)

Damage of Ti-6Al-4V Alloy Induced by Hypervelocity Impact

Journal of Spacecraft and Rockets (2011)

Shuangshi Dong Ziqin Ye Hong Bin Geng Haimo Zhang Yongchun Zou

Covers advancements in spacecraft and tactical and strategic missile systems, including subsystem design and application, mission design and analysis, materials and structures, developments in space sciences, space processing and manufacturing, space operations, and applications of space technologies to other fields.

Hypervelocity

Spacecraft design

Space environment

10.2514/1.49458

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Citations (1)

Optimized Control of Photovoltaic Shading Hydrogen Production System Considering Electrolysis Efficiency Improvement

Kangle Cheng Shan He Bing Hu

This study addresses the adverse effects of PSC on both PV output and PEMEC performance. It establishes a PV-PEMEC hydrogen production simulation model considering complex PSC scenarios. The analysis delves into the impacts of PSC on electrolyzer performance, including internal overpotential, internal pressure variation, and electrolysis efficiency. A hybrid GMPPT algorithm based on IGWO and AP&Q is proposed to mitigate PSC effects on the electrolyzer. The algorithm enhances population initialization with chaotic mapping and antagonistic learning mechanisms within the GWO algorithm. Additionally, it incorporates Levy flight and random walk strategies to improve local search capability, coupled with AP&Q to enhance convergence speed. Results indicate significant impacts of PV array PSC on PEM electrolyzer internal electrochemical mechanisms, particularly affecting Ohmic and diffusion overvoltages. Different local shading scenarios cause continuous fluctuations in electrolysis efficiency, more pronounced at lower current densities. PSC induces substantial fluctuations in hydrogen partial pressure and fewer fluctuations in oxygen partial pressure. The IGWO-AP&Q hybrid algorithm exhibits high responsiveness and tracking efficiency, yielding the highest PV-PEMEC electrolysis efficiency. This study effectively integrates complex multi-scenario PSC with PEMEC for solar-powered hydrogen production, laying a solid theoretical foundation for regions with high solar indices.

Shading

10.2139/ssrn.4823852

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Citations (0)

CCDC 2130972: Experimental Crystal Structure Determination

The Cambridge Structural Database (2022)

Jing Liu Qi Tang Jian Huang Te Li Han Ouyang

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/ccdc.csd.cc29jg1c

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Tracer Diffusion and Crystallite Growth in Ultrafine- Grained Pd Prepared by Severe Plastic Deformation

R. Wuerschum A. Kuebler S. Gruß P. Acharwaechter W. Frank

TRACER

Severe Plastic Deformation

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Citations (8)