Xiaolei Zhao

Chinese Academy of Sciences

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A.E. Litherland

University of Toronto

W.E. Kieser

University of Ottawa

J. Eliades

Korea Institute of Science and Technology

L.R. Kilius

University of Toronto

Wei Huang

Nanjing Tech University

Xiayin Yao

Chinese Academy of Sciences

Hui‐Fen Qian

Nanjing Tech University

J. C. Rucklidge

University of Toronto

Gaozhan Liu

Chinese Academy of Sciences

Marie‐Josée Nadeau

Vitensenteret i Trondheim

Cooperative Institutions

Chinese Academy of Sciences

Ningbo Institute of Industrial Technology

University of Toronto

University of Chinese Academy of Sciences

Xi'an Jiaotong University

Sun Yat-sen University

University of Ottawa

Sichuan University

Harbin Institute of Technology

China University of Petroleum, East China

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Type I photosensitizer based on AIE chromophore tricyano-methylene-pyridine for photodynamic therapy

Green Chemical Engineering (2022)

Chao Pan Weijun Zhao Xiaolei Zhao Zhenxing Liu Xiangyu Li

Image guided photodynamic therapy (PDT) combines fluorescence tracing and phototherapy, which can achieve a more accurate and effective treatment effect. However, traditional photosensitizers are limited by the aggregation-caused fluorescence quenching (ACQ) effect and low reactive oxygen species (ROS) generation in a hypoxic environment, resulting in poor imaging and treatment effect. Herein, we report a tricyano-methylene-pyridine (TCM)-based Type I aggregation-induced emission (AIE) photosensitizer (TCM-MBP), the strong electron acceptance (D-A) effect extends the wavelength to near-infrared (NIR) region to reduce the autofluorescence interference, and oxygen atoms provide lone pair electrons to enhance the inter system crossing (ISC) rate, thereby promoting the generation of more triplet states to produce ROS. The AIE photosensitizer TCM-MBP exhibited low oxygen dependence, NIR emission, and higher ROS production compared to commercially available Ce 6 and RB. After encapsulation with DSPE-PEG2000, TCM-MBP nanoparticles (TCM-MBP NPs) could penetrate to visualize cells and efficiently kill cancer cells upon light irradiation. This study provides an oxygen-independent AIE photosensitizer, which has great potential to replace the commercial ACQ photosensitizers.

Methylene blue

Chromophore

10.1016/j.gce.2022.07.004

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Citations (9)

Certification of Uranium Isotope Amount Ratios in a Suite of Uranium Ore Concentrate Certified Reference Materials

Geostandards and Geoanalytical Research (2021)

Ruoxi Zhang Kenny Nadeau Eduardo A. Gautier Paola A. Babay José Luis Ramella

In this study, data from thirteen laboratories from around the world are presented for a successful certification of uranium isotope ratios in uranium ore concentrate (UOC) certified reference materials from the National Research Council Canada. Different mass spectrometric measurement principles (including SF‐ICP‐MS, quadruple ICP‐MS, TIMS, MC‐ICP‐MS, SIMS and AMS) and measurement procedures were employed. In general, data from all sources exhibit good consistency with TIMS and MC‐ICP‐MS showing superior performance. The three candidate UOC CRMs (UCLO‐1, UCHI‐1 and UPER‐1) have natural uranium isotope ratios with certified values of 0.5304(7) × 10 −4 , 0.5475(2) × 10 −4 and 0.5361(4) × 10 −4 for n ( 234 U)/ n ( 238 U) and 0.007 2563(13), 0.007 2563(10) and 0.007 2542(11) for n ( 235 U)/ n ( 238 U), respectively, with expanded uncertainty ( k = 2) applicable to the last digit of the value given in the parentheses. Information values for n ( 236 U)/ n ( 238 U) in these three CRMs, measured by AMS, are also provided: 10 × 10 −12 , 200 × 10 −12 and 22 × 10 −12 . The uncertainties of the proposed certified values of uranium isotope ratios in UOC CRMs are superior to available reference materials, and the values of n ( 234 U)/ n ( 238 U) and n ( 236 U)/ n ( 238 U) show significant variation among the three CRMs.

Certified reference materials

Isotopes of uranium

Uranium ore

Reference values

Natural uranium

10.1111/ggr.12409

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Citations (8)

A simulation study of linear RF ion guides for AMS

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms (2014)

Xiaolei Zhao A.E. Litherland

10.1016/j.nimb.2014.11.092

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Citations (1)

The potential for AMS analysis of 10Be using BeF−

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms (2004)

Xiaolei Zhao A.E. Litherland Jonathan P. Doupé W.E. Kieser

Isobar

Accelerator mass spectrometry

Metastability

10.1016/j.nimb.2004.04.041

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Citations (29)

[Reactivation of Passivated Biochar/Nanoscale Zero-Valent Iron by an Electroactive Microorganism for Cooperative Hexavalent Chromium Removal and Mechanisms].

Huan jing ke xue= Huanjing kexue (2021)

Cong-Jian Liao Xiaolei Zhao Kai Liu Songxiong Zhong Fangbai Li

Nanoscale zero-valent iron (nZVI) shows excellent reduction of Cr(Ⅵ), but the passivation on its outer surface can restrict its longevity and performance. To tackle this problem, this work introduced Shewanella oneidensis MR-1, a dissimilatory iron-reducing bacterium, into the chemical reduction system of aged nZVI/biochar (B) and Cr(Ⅵ). The potential synergistic effect of Cr(Ⅵ) reduction of aged nZVI/B and MR-1 was systematically investigated under varying conditions. The results indicated that aged nZVI/B and MR-1 exhibited a synergistic effect at a pH of 7, and the removal rate of Cr(Ⅵ) increased by 51.3%. Further research showed that the synergistic effect could be attenuated with the increase in the initial Cr(Ⅵ) concentration and enhanced with the increase in the MR-1 concentration. The XPS spectra confirmed that Cr(Ⅵ) was mainly removed through reduction. The dissimilatory iron-reducing ability of MR-1 played a key role in enhancing the Cr(Ⅵ) reduction. The reductive dissolution of the oxidation layers not only released reactive sites inside the nZVI, but also reduced Cr(Ⅵ) by producing ferrous ions. Moreover, B promoted the reduction by dispersing the nZVI and mediating the extracellular electron transfer. This study provides a new insight into solving the passivation problem of the long-term application of nZVI for Cr(Ⅵ) removal, which is considered a promising solution for synergistically improving the performance of nZVI in environmental remediation.

Zerovalent iron

Shewanella oneidensis

Hexavalent Chromium

Passivation

Extracellular polymeric substance

10.13227/j.hjkx.202010021

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Citations (1)

An amorphous niobium polysulfide based nanocomposite enables ultrastable all-solid-state lithium batteries

Materials Chemistry Frontiers (2023)

Wenrui Xie Mingyuan Chang Wentong Fan Mengli Yang Fuli Tian

An amorphous niobium polysulfide based nanocomposite with electronic/ionic conductive networks is prepared and further employed as a cathode for all-solid-state lithium batteries, exhibiting superior long-term cycling stability as well as high reversible capacity.

Polysulfide

Niobium oxide

10.1039/d3qm00173c

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Citations (3)

The 3MV Multi-Element AMS in Xi'an, China: Unique Features and Preliminary Tests

Radiocarbon (2006)

Weijian Zhou Xiaolei Zhao Xuefeng Lu Lin Liu Zhengkun Wu

A 3MV multi-element accelerator mass spectrometer (AMS) has been installed in Xi'an, China, and preliminary tests have been completed. The results of both background and precision tests for 4 nuclides are 3.1 × 10 –16 , 0.2% ( 14 C); 1.8 × 10 –14 , 1.4% ( 10 Be); 2.3 × 10 –15 , 1.14% ( 26 Al); and 2.0 × 10 –14 , 1.75% ( 129 I). The unique features of this facility are the newly developed ion source accepting solid and CO 2 samples; the specially designed low-energy injector, including a “beam blanking unit” and “Q-snout”; the acceleration tube structure with the combined magnetic and electrostatic suppression; and the function of the slit stabilization in the post-acceleration system. These features are discussed in terms of the end-user's point of view.

Accelerator mass spectrometry

Nuclide

10.1017/s0033822200066492

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Citations (67)

Accelerator mass spectrometry of 129I: Technique and applications

Journal of Radioanalytical and Nuclear Chemistry (2005)

W.E. Kieser Xiaolei Zhao Carmen Soto B. L. Tracy

Accelerator mass spectrometry

Sample (material)

10.1007/s10967-005-0597-9

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Polyimide-Based Solid-State Gel Polymer Electrolyte for Lithium–Oxygen Batteries with a Long-Cycling Life

ACS Applied Materials & Interfaces (2023)

Zelin Xu Ziqiang Liu Zhi Gu Xiaolei Zhao Dingcheng Guo

Metal-air batteries have attracted wide interest owing to their ultrahigh theoretical energy densities, particularly for lithium-oxygen batteries. One of the challenges inhibiting the practical application of lithium-oxygen batteries is the unavoidable liquid electrolyte evaporation accompanying oxygen fluxion in the semi-open system, which leads to safety issues and poor cyclic performance. To address these issues, we propose a solid-state polyimide based gel polymer electrolyte (PI@GPE), immobilizing and reserving a liquid electrolyte in the gelled polymer substrate. The liquid electrolyte uptake of PI@GPE is measured to be 842%, 6 times higher than that of the commercial glass fiber separator, contributing to a high ionic conductivity of 0.44 mS cm-1. Additionally, PI@GPE possesses an enhanced lithium transference number of 0.596 as well as superior interfacial compatibility with lithium metals. Under 0.1 mA cm-2 and 0.25 mA h cm-2, PI@GPE-based lithium-oxygen batteries demonstrate distinguished long-cycling stability of 366 cycles, 4 times more than that with a glass fiber separator and liquid electrolyte. Our work provides a unique solid-state gel polymer electrolyte to mitigate liquid electrolyte leakage, exhibiting promising potential application in highly safe lithium-oxygen batteries with a long-cycling life.

Separator (oil production)

10.1021/acsami.2c22694

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Citations (24)

Rehabilitation of tubular members with carbon reinforced polymers

Routledge eBooks (2017)

M.V. Seica Jeffrey A. Packer P. Guevara Ramirez S.A.H. Bell Xiaolei Zhao

Tubular structures have become increasingly popular for steel and aluminium construction, for economic and aesthetic reasons, yet member deterioration and fatigue-cracking of connections is often reported in the offshore industry, in the transportation and agricultural sectors, and with amusement rides. The suitability of such materials to rehabilitate tubular steel members and the structural behaviour of the resulting composite system were investigated experimentally. The programme was tailored primarily to the offshore industry and techniques associated with underwater repair methods. Employing a wet-layup application method, the main focus was on the static flexural performance of steel-FRP composite beams, with principal experimental parameters being the fibre and epoxy material types and the matrix curing conditions. Curing of the specimens was performed both in air and in seawater, the latter simulating the condition for underwater application to offshore structures. The strengthening process was effective as all wrapped composite members exhibited improved structural performance compared to that of a bare tube. The current study has proven the feasibility of rehabilitating tubular steel members with advanced composite materials, underwater.

Carbon fibers

10.1201/9780203734964-44

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Citations (18)