Nanomaterials
·
2023
·Vol. 13
·期 5
·865
·
IF 5.3
Yinbo Wu,Yaowei Feng,Xiulian Qiu,Fengming Ren,Jian Cen,Qingdian Chong,Ye Tian,Wei Yang
Lithium-sulfur batteries with high theoretical energy density and cheap cost can meet people’s need for efficient energy storage, and have become a focus of the research on lithium-ion batteries. However, owing to their poor conductivity and “shuttle effect”, lithium-sulfur batteries are difficult to commercialize. In order to solve this problem, herein a polyhedral hollow structure of cobalt selenide (CoSe2) was synthesized by a simple one-step carbonization and selenization method using metal-organic bone MOFs (ZIF-67) as template and precursor. CoSe2is coated with conductive polymer polypyrrole (PPy) to settle the matter of poor electroconductibility of the composite and limit the outflow of polysulfide compounds. The prepared CoSe2@PPy-S composite cathode shows reversible capacities of 341 mAh g−1at 3 C, and good cycle stability with a small capacity attenuation rate of 0.072% per cycle. The structure of CoSe2can have certain adsorption and conversion effects on polysulfide compounds, increase the conductivity after coating PPy, and further enhance the electrochemical property of lithium-sulfur cathode material.Keywords:lithium-sulfur battery;transition metal selenides;metal-organic framework;polypyrrole;sulfur host
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Zhenyun Zhao,Jie Yang,Jingwen Lin,Xu Wang,Dongliang Chen,Lei Jiao,Qinghua Zhang,Yang Hou,Zhizhen Ye,Jianguo Lu
Transition metal selenides have attracted particular interest in the energy storage field due to their high conductivity, but their low specific capacitances limit their development. Herein, we design the Co 0.85 Se with an orderly aligned nanowire-arrayed (NWA) structure, which has great micromorphological stability and fast electronic/ionic transport rate, achieving a high specific capacitance of 1800 F g −1 at 1 mV s −1 . The asymmetric supercapacitors (ASCs) are built to widen the voltage window to 0– 1.6 V and then increase the energy density , which reaches 71.3 Wh kg −1 at a power density of 800 W kg −1 in the liquid-state electrolyte, and 3.03 mWh cm −3 at the power density of 8.0 W cm −3 in the solid-state electrolyte. It also shows excellent cycling stability of 86 % retention after 10,000 charge/discharge cycles, fast rate capability of 79 % retention at the 15-fold increased current density and little performance degradation even under severe bent deformation. As shown, the Co 0.85 Se NWAs-based ASCs own high energy and power densities, long cycle life, fast rate capability and stable flexibilities simultaneously, which have significant potential in high-performance wearable energy storage systems .
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Qianqun Xu,Lijuan Peng,Kaifen Luo,Jiahuan Zhong,Chengkai Zhang,Dingsheng Yuan
A flexible solid rechargeable Zn-air battery for advanced energy conversion and storage has extensive applications in portable electric sources, wildlife rescue and flexible wearable systems. Herein, the CoSe 2 nanoparticles anchored on cobalt-embedded N -doping carbon nanoplates (CoSe 2 /CoNC) is developed as a highly active bifunctional catalyst via pyrolysis and selenization of bimetallic zeolitic imidazolate frameworks containing Zn and Co. The introduction of inactive Zn generates strong electrochemically active surface areas due to the synergistic effect between CoSe2 nanoparticles and CoNC matrix. Further, CoSe2/CoNC exhibits prominent Zn–air battery performance and even outperforms the commercially available noble-metal catalysts. Notably, a high-rate flexible Zn-air battery enabled by an alkaline composite polyacrylic acid-carboxymethyl cellulose electrolyte delivers the open-circuit potential of 1.51 V. The battery offers high wearability and performs very well under various conditions, such as soaking, drilling and sewing.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 9
·2716-2730
·
IF 7
Siyuan Gao,Fangmian Wei,Johannes Karges,Yukun Zhao,Liangnian Ji,Hui Chao
Melanoma is one of the most aggressive and deadliest forms of skin cancer. Besides traditional medicinal techniques, the use of photodynamic therapy is receiving increasing attention as a complementary method. Despite recent advances in the field, the majority of compounds unselectively localize inside the organism and are excited with blue or ultraviolet light, limiting the application of this method to superficial tumors. To overcome these drawbacks, herein, the encapsulation of cyclometalated iridium(III) prodrugs into selenium nanoparticles, which were further camouflaged with cancer cell membranes, is reported. The nanocomposite readily dissociated upon exposure to hydrogen peroxide, triggering the release of the iridium complex, which acts as a photosensitizer, as well as methylquinone and selenium nanoparticles, which act as glutathione scavengers and chemotherapeutic reagents. The reduced intracellular glutathione levels enhance the sensitivity of the cancer cells for anticancer treatment. The cancer cell membrane-camouflaged nanoparticles showed improved selectivity, membrane permeability, and pharmacokinetic effect for cancerous cells. Upon two-photon excitation at 730 nm, the nanoparticles were able to identify as well as nearly fully eradicate a melanoma tumor inside a mouse model by synergistic chemotherapy and near-infrared photodynamic therapy.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2023
·
IF 7.3
J.P. Mwizerwa,K. Xu,C. Liu,N. Zhao,Y. Li,P. Ndagijimana,Z. Chen,J. Shen
Currently, the development of high-performance lithium-ion batteries (LIBs) with improved areal capacity is still challenging. The common strategy to improve areal capacity is to increase the thickness of electrode materials. However, the application of thick electrodes remains challenge due to poor mechanical properties , slow charge and ion transport, and poor electrolyte infiltration . In this study, thick electrodes are constructed by 3D printing a Li 4 Ti 5 O 12 @VSe 2 -based ink. The highly electrical conductor VSe 2 on the Li 4 Ti 5 O 12 surface improves the ion and charge transport and eases the internal resistance of the 3D-printed electrode during charge and discharge. As a result, LIBs employing these thick electrodes show a high-rate capability of 128.9 mAh/g at 10 C, improved areal capacities up to 6.2 mAh/cm 2 , and ultrastable cycling capability (84.5% of capacity retention after 1700 cycles). Moreover, full cells utilizing 3D-Li 4 Ti 5 O 12 @VSe 2 as the anode and 3D-LiFePO 4 @AC/rGO as the cathode with 1.81 V potential yield a high specific capacity of 152.5 mAh/g at 0.1C, a high specific energy density of 276.025 Wh/kg, and a power density of 30.5 W/kg at 0.1C. This work paves the way to designing thick electrodes for high-performance LIBs.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 14
·6540-6550
·
IF 3.3
Guoxu Ni,Yingjie Zhang,Yuzheng Li,Chengxiao Xu,Jinjie Zhang,Peipei Huo,Bo Liu
Metal selenides are considered outstanding potential anodic materials of sodium ion batteries due to their large specific capacity. However, their actual application is heavily restricted because of the unfavorable volume expansion, inferior cycling stability, as well as inactive kinetics. To solve this problem, the structure of SnSe@f-Ti3C2 was rationally designed and synthesized via a simple one-pot solvothermal process for the first time in this work. The high-capacity 0D SnSe quantum dots grow in situ and are characterized as homogeneously distributed on the 2D conductive MXene sheet via the electrostatic attraction of Sn ions and MXene. The SnSe@f-Ti3C2 composite exhibits a remarkably increased capacity of 540 mA h g−1 at 0.05 A g−1 and excellent cycle performance of 97.79% retention ratio after 100 cycles at 0.5 A g−1. The outstanding electrochemical performance of the SnSe@f-Ti3C2 hybrid was mainly attributed to the synergy between 0D SnSe with high capacitance and the 2D MXene sheet with superior conductivity. On one hand, 0D SnSes act as pillars between MXene layers in order to prevent the stacking of MXene nanosheets. On the other hand, the fast electron/ion transport capability and large specific surface area provided by MXene as a conductive skeleton facilitates favorable transfer kinetics as well as close contact in the electrolyte/electrode interface.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Physics
·
2023
·
IF 11.5
Xiaolong Liang,Rui Xu,Mengruizhe Kong,Han Wan,Wei Bai,Deming Dong,Qizhu Li,Huihong Xu,Zhou Li,Binghui Ge,Jiming Song,Chong Xiao
Owing to the unavoidable electron scattering , introducing phonon-scattering defects to suppress the phonon diffusion in thermoelectric materials will always deteriorate the carrier transport. Therefore, exploring new methods to counterpoise the contradiction between carrier transport and phonon scattering is urgently needed. Herein, present work highlights that Pb/In codoping on BiCuSeO can suppress the phonon propagation while preserving the carrier transport, which alleviates the contradiction between carrier mobility (μ) and lattice thermal conductivity (κ l ), and improves the thermoelectric performance in Pb/In-codoped BiCuSeO. Multi-scale phonon-scattering centers, such as point defects , dislocations, In 2 O 3 /Cu 2 Se nano-precipitates and phase/grain boundaries, were introduced to promote full-wavelength phonon scattering, which brought about much reduced κ l and substantially low total thermal conductivity, and a minimum κ l of 0.30 W m −1 K −1 was achieved in Bi 0·91 Pb 0·06 In 0·03 CuSeO at 873 K. More importantly, Pb/In codoping can compensate the increased density of state effective masses caused by Pb single-doping, which resulted in improved μ and the obvious increased μ/κ l . In addition, the improved μ also led to considerably increased electrical conductivity and power factor. Finally, the maximum ZT of 1.23 at 873 K and a high ZT avg of 0.72 between 300 and 873 K are achieved in Bi 0·93 Pb 0·06 In 0·01 CuSeO, which is superior to both the pristine and Pb-single-doped counterparts. Our findings elucidate the importance of balancing the carrier transport and phonon scattering during defect modulation of the thermoelectric performance.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xiang Shang,Yong Jin,Weining Du,Long Bai,Rong Zhou,Wenhua Zeng,Kunyan Lin
Waterborne polyurethane has drawn extensive attention due to its environmental friendliness and is widely used in many areas. However, it is still a great challenge to synthesize waterborne polyurethanes with flame retardancy and fast room-temperature self-healing ability, along with excellent mechanical performance and emulsion stability due to the mutually contradictory nature of these properties. Herein, waterborne polyurethanes containing organic selenium (SWPU-x) from 0.67 to 3.28 wt % were synthesized, which could simultaneously realize flame retardancy and self-healing ability based on the ability to scavenge active free radicals at high temperature and the dynamic switch of diselenide. All these SWPU-x films self-extinguished within 1 s after the ignition in the vertical combustion tests. The limiting oxygen index of SWPU-4 was improved to 28.5% with excellent UL-94 level (V-0) and self-healing efficiency (91.25%, after being healed in the photoreactor for 30 min at room temperature), together with high mechanical properties (tensile strength was 18.5 MPa and elongation at break was 869.63%), and the total heat release (THR) for SWPU-4 (49.28 MJ/m2) could decrease to 23.80% of the THR for the original waterborne polyurethane WPU (64.67 MJ/m2). This work discovered a new flame-retardant element (organic selenium) and studied its flame-retardant behaviors and self-healing function simultaneously, which would extremely extend the application of waterborne polyurethanes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Ting Liang,Jingwen Wei,Shiming Zhang,Jinhang Yang,Jiangli Sun,Zuji Li,Zhihong Li,Zebin Yu,Shuangfei Wang,Yanping Hou
Design of photocatalysts with high-efficiency for sunlight utilization is one of the prerequisites for CO 2 photoreduction . Besides, modulating a stable electron-donating environment to meet the energy barrier for CO 2 reduction to CO is crucial. In this work, the ZnSe/Ag 2 Se/AgBr (ZAA) heterojunction was fabricated by growing the ZnSe on the AgBr surface accompanied by in-situ generation of Ag 2 Se between the two components by hydrothermal process. Results showed that the ZAA exhibited excellent light response ability over the full wavelength range. X-ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) demonstrated that the charge transfer of the ZAA conformed to dual Z-scheme mechanism, with the Ag 2 Se acting as an electron transfer bridge, which in turn acted as an electron reservoir to accelerate electron transfer, facilitating carriers’ separation. The highest CO yield of 54.14 µmol/g/h was obtained from the optimal ZAA-2, which was 11.76 and 10.44 times of pure ZnSe and Ag 2 Se, respectively. This work demonstrated the feasibility of a dual Z-scheme heterostructure with full spectrum response for offering stable electron-donating environment and improving electron transfer for enhanced photocatalytic activity.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Yuxuan He,Jin Qian,Peifang Wang,Taiping Xie,Dionysios D. Dionysiou,Bianhe Lu,Sijing Tang
Advanced strategies for enhancing catalytic performance of catalysts include multi-metal active site exposure, vacancy growth and electronic structure optimization. Here, carbon nanotube-loaded CoSe 2 /FeSe 2 catalysts (Co/Fe-CNT) with multiphase boundaries and embedded selenium vacancies (V Se ) were prepared using a one-step hydrothermal method. The catalysts feature unique electronic structures and abundant active sites, and were found to exhibit unexpectedly high activity and stability in photocatalytic mediated sulphate radical (SR-photo) system, with impressive oxidation capacity for complex matrix polluted water. The spontaneously formed internal electric field strongly promoted charge transport and significantly enhanced the photocatalytic property. The V Se formed at the heterogeneous interface could modulate the surface electronic structure and accelerate the redox cycling of transition metals, thereby accelerating the production of reactive oxygen species and boosting the efficiency of contaminant degradation. This work provides guidance for the design of high-performance catalysts for V Se engineering and expands their potential for application in wastewater purification.
✓ 已验证
产品关联
DOI
高影响因子
Light-Science & Applications
·
2023
·Vol. 12
·期 1
·1-10
·
IF 19.4
Gu Kai,Zhong Haizheng
Light-to-heat conversion has been intensively investigated due to the potential applications including photothermal therapy and solar energy harvesting. As a fundamental property of materials, accurate measurement of light-to-heat conversion efficiency (LHCE) is of vital importance in developing advanced materials for photothermal applications. Herein, we report a photothermal and electrothermal equivalence (PEE) method to measure the LHCE of solid materials by simulating the laser heating process with electric heating process. The temperature evolution of samples during electric heating process was firstly measured, enabling us to derive the heat dissipation coefficient by performing a linear fitting at thermal equilibrium. The LHCE of samples can be calculated under laser heating with the consideration of heat dissipation coefficient. We further discussed the effectiveness of assumptions by combining the theoretical analysis and experimental measurements, supporting the obtained small error within 5% and excellent reproducibility. This method is versatile to measure the LHCE of inorganic nanocrystals, carbon-based materials and organic materials, indicating the applicability of a variety of materials.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Wei Wang,Fengmin Zhong,Dun Wang,Yuqi Zhao,Dongdong Peng,Shuang Li,Qian Ning,Shengsong Tang,Cui-Yun Yu,Hua Wei
Hypothesis Construction of dual gatekeepers-functionalized mesoporous organic silica nanoparticles (MONs) with both physical and chemical mechanisms for modulated drug delivery properties provides one solution to the extracellular stability vs. intracellular high therapeutic efficiency of MONs that hold great potential for clinical translations. Experiments We reported herein facile construction of diselenium-bridged MONs decorated with dual gatekeepers, i.e. , azobenzene (Azo)/polydopamine (PDA) for both physical and chemical modulated drug delivery properties. Specifically, Azo can act as a physical barrier to block DOX in the mesoporous structure of MONs for extracellular safe encapsulation. The PDA outer corona serves not only as a chemical barrier with acidic pH-modulated permeability for double insurance of minimized DOX leakage in the extracellular blood circulation but also for inducing a PTT effect for synergistic PTT and chemotherapy of breast cancer. Findings An optimized formulation, DOX@(MONs-Azo3)@PDA resulted in approximately 1.5 and 2.4 fold lower IC50 values than DOX@(MONs-Azo3) and (MONs-Azo3)@PDA controls in MCF-7 cells, respectively, and further mediated complete tumor eradication in 4T1 tumor-bearing BALB/c mice with insignificant systematic toxicity due to the synergistic PTT and chemotherapy with enhanced therapeutic efficiency.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）