JOURNAL OF POWER SOURCES
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2020
·
IF 8.247
Fengchen Zhou,Xu-Sheng Yang,Jiangwen Liu,Jun Liu,Renzong Hu,Liuzhang Ouyang,Min Zhu
Titanium phosphide (TiP 2 ) is particularly interesting due to its ability to form the stable Li–Ti–P ternary phase. However, TiP 2 faces the limitations in cyclic stability due to the volume change occurred by the destruction/recovery of the long-range cubic order Li–Ti–P phase, and unable to deliver high capacity. In this work, we propose the in-situ formation of electrochemically inactive TiP and phosphorus via partial decomposition of TiP 2 by ball milling process, achieving a multi-phase TiP 2 –TiP–P–C composite. On one hand, the decomposition-formed TiP effectively relieve the stress caused by the formation of Li x TiP 4 and LiP 3 . On the other hand, another decomposition-formed small-sized phosphorus significantly reduce its volume change during the lithiation/delithiation cycles for the overall capacity. Accordingly, the synthesized multi-phase TiP 2 –TiP–P–C with the above cooperative effects delivers a high capacity of 836.3 mAh g −1 at 0.2 A g −1 as high-performance Lithium-ion battery anode. In addition, a notable capacity retention of 81.4% is also achieved after 1000 cycles at 5 A g −1 . Furthermore, when paired with LiFePO 4 cathode in a full cell, the excellent specific capacity, cycling and rate performance can also be obtained. The rational design of TiP 2 –TiP–P–C will be beneficial towards the future development of metal-phosphide-phosphorous composite as LIB anode.
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JOURNAL OF POWER SOURCES
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2020
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IF 8.247
Yiping Hu,Yang Liu,Xuefeng Long,Yu Long,Feng Li,Dongsheng Ma,Ping Ma,Ming Chen,Lili Gao,Jun Jin,Jiantai Ma
By designing the morphology and architecture of employed electrocatalysts , the development of high-performance hydrogen evolution reaction (HER) electrocatalysts for electrolytes with a wide pH range is practical significance for future energy conversion technologies. Herein, we synthesize an electrocatalyst composing of two-dimensional (2D) ultrathin ternary pyrite-type cobalt phosphosulfide nanosheets and conductive carbon black (CoPS NSs/C) by the one-step phosphosulfide process. Thanks to the introduction of the C, the composite not only presents a unique three-dimensional (3D) interconnected reticulum structure but also effectively reduces the thickness of nanosheets. The as-synthesized electrocatalyst exhibits remarkable small overpotential toward HER in wide pH range. Meanwhile, the electrocatalyst owns higher charge transfer rate and excellent stability. The good performance is mainly attributed to the combination of the advantages of both 2D nanosheets and 3D interconnected reticulum structure, which offers larger surface area, sufficient active sites and more contaction with electrolytes. This work provides a new method for preparing ultrathin ternary transition-metal phosphosulfide (TMPS) nanosheets, and offers a facile route for improving electrocatalytic activity by designing synergistic morphology of 2D and 3D.
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DALTON TRANSACTIONS
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2020
·Vol. 49
·期 46
·17026-17032
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IF 4.174
Miao Wang,Guo-Ming Weng,Ghulam Yasin,Mohan Kumar,Wei Zhao
Tin phosphide (SnxPy) is considered as an alternative anode material for lithium-ion batteries (LIBs) due to its high theoretical lithium-storage ability. Herein, carbon-coated SnP/C and Sn4P3/C composites are obtained via a facile solid-phase method for the first time. Subsequently, the lithium storage performances of SnP/C and Sn4P3/C are investigated in coin-cells, demonstrating a significantly high lithiation capacity and outstanding stability due to the introduction of carbon. Typically, the SnP/C anode delivers a very high specific capacity up to 751 mA h g−1 at 0.1 A g−1 and a specific capacity of 610 mA h g−1 with a long cycling life of 500 cycles at a current density of 1.0 A g−1, while the Sn4P3/C anode yields 727 mA h g−1 at 0.2 A g−1 after 100 cycles. The specific capacities achieved here are remarkably higher than those of any other tin phosphide materials reported in previous studies. Moreover, the stability and cycling performance of these materials are significantly better in comparison with the previous studies, manifesting the best lithium-storage capacity performance of the SnxPy anode to date.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Yuanyuan Li,Pengcheng Feng,Cong Wang,Wenjun Miao,He Huang
The severe issues facing conventional therapies for triple negative breast cancer (TNBC), such as poor response rate and side effects, calls for new strategies to realize better prognosis. Owing to the merits of good efficacy, safety and facile implementation, phototherapy represents an attractive modality for this goal. Black phosphorus (BP) is a class of novel interesting materials for biomedical uses with advantages of biodegradability and optical activity. However, its stability, safety and biological performance remained to be further optimized. In this work, we report a novel light-responsive nanosystem, named [email protected] , for fluorescence imaging-guided synergistic photothermal and photodynamic therapy (PTT/PDT) against TNBC. Hyaluronic acid was coated onto NIR dye(cypate)-loaded BPN, resulting in favorable stability, excellent delivery efficiency into tumor cells and photothermal and photodynamic potential. Importantly, the safety profile of HBPN was greatly improved, compared to the counterpart without HA coating. Following NIR irradiation, localized generation of singlet oxygen and hyperthermia by [email protected] had a significant antitumor effect against both 4T1 cell monolayers and 3D organoids in vitro . Additionally, [email protected] showed significantly enhanced accumulation in tumor tissue and subsequently promoted light-triggered tumor ablation in a mouse model of TNBC. Taken together, this study demonstrates that novel nanophototherapeutics with great stability and safety profile such as [email protected] represent a promising platform for imaging-guided phototherapy for breast cancer treatment.
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ACS Applied Nano Materials
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2020
·
IF 0
Xiaoyong Ren,Xiao Yang,Guoxin Xie,Jianbin Luo
In this study, black phosphorus quantum dots (BPQDs) have been successfully prepared at a low cost and high yield by the liquid-based high-energy ball milling method. The obtained BPQDs with an average lateral size of 6.5 ± 3 nm and a thickness of 3.4 ± 2.6 nm dispersed stably in ethylene glycol (EG). A robust macroscale superlubricity state (μ, 0.002) was achieved under a high contact pressure of 336 MPa via the lubrication of BPQDs-EG aqueous suspension (BPQDs-EGaq) at the Si3N4/sapphire frictional interface. The wear rate lubricated by BPQDs-EGaq suspension account for 5.96% of that lubricated by EG aqueous solution (EGaq), demonstrating the improvement in the antiwear property with the addition of BPQDs. The rolling effect of BPQDs and the low shear stress between the BPQDs interlamination played important roles in the improvement in the antiwear property. The oxidative products of BPQDs (PxOy) contributed to the effective realization of macroscale superlubricity. This work realized macroscale superlubricity at a high contact pressure by combining the BPQDs with special liquid molecules and provided the great potential in industrial applications.
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BIOSENSORS & BIOELECTRONICS
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2020
·
IF 10.257
Yuhan Zhu,Zuwei Xu,Jie Gao,Weihao Ji,Jingdong Zhang
The progesterone (P4) level in body fluids can act as an indicator for early pregnancy diagnosis and offers insight into mammalian somatic function. In this work, we designed an antibody-aptamer based sandwich assay as a cathodic photoelectrochemical (PEC) biosensor for P4 detection. The composites of carbon dots and graphene oxide (CDs-GO) with favorable cathodic photocurrent response were used as photoactive materials on which the antibody (Ab) of P4 was immobilized. Meanwhile, high affinity truncated P4 aptamer was immobilized on Au–CuO–Cu 2 O to act as a bioconjugate . When P4 was present, the aptamer-Au-CuO-Cu 2 O bioconjugate could amplify the cathodic photocurrent of CDs-GO modified electrode through Ab-P4-aptamer interactions. Under optimum conditions, the cathodic photocurrent of the constructed PEC biosensor was found to increase linearly with P4 in a wide concentration range from 0.5 nM to 180 nM, with a low detection limit (3S/N) of 0.17 nΜ. The proposed cathodic PEC sensing platform demonstrated high selectivity , satisfying reproducibility, good stability. The sensor was successfully applied in the determination of P4 in human serum samples.
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Y.Q. He,Fangling Zhang,Bei Ma,Na Xu,Lucas Binnah Junior,Binghua Yao,Qian Yang,Dongjie Liu,Zhanying Ma
In this study, a highly efficient ternary 6.7%Au/Ni 2 P/g-C 3 N 4 nanocomposite is rationally fabricated through a two-step hydrothermal followed by green photoreduction strategy. The XPS analysis, SEM and HRTEM images reveal that Ni 2 P and good nanoparticles (AuNPs) are successfully loaded onto the surface of g-C 3 N 4 and heterojunction formed among them. The optimized 6.7%Au/0.5%Ni 2 P/g-C 3 N 4 demonstrates the highest photocatalytic efficiency towards decomposition of levofloxacin hydrochloride with 88.23% removal rate and hydrogen generation rate of 78.65 μmol·g −1 ·h −1 , in comparison with the binary 0.5%Ni 2 P/g-C 3 N 4 (76.86%, 47.06 μmol·g −1 ·h −1 ) and pristine g-C 3 N 4 (61.26%, 45.61 μmol·g −1 ·h −1 ). Notably, this is the first time using Ni 2 P and AuNPs co-modified g-C 3 N 4 -based nanocomposites to evaluate the photocatalytic degradation performance of levofloxacin hydrochloride. The study of the corresponding enhanced mechanism indicates that the dramatically improved photocatalytic performance is originated from the synergistic effects: including (1) the strong optical absorption property of Ni 2 P and the SPR effect of AuNPs endows the remarkably improved visible-light harvesting for increasing charge carrier production; (2) the co-catalysts of Ni 2 P and AuNPs play key roles as interfacial electron sinkers and facilitate photogenerated electron-hole pairs separation and migration; (3) the co-integration improves the specific surface area of final product which can provide more active sites for the improvement of photocatalytic performance. Moreover, a plausible degradation pathway for levofloxacin hydrochloride is proposed based on the UPLC-MS analysis. Our work highlights a good example for designing and constructing other highly-efficient g-C 3 N 4 -based multicomponent photocatalysts for both solar energy conversion and environmental remediation.
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ChemistryOpen
·
2020
·Vol. 9
·期 3
·366-373
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IF 2.37
Jin Song,Xiaojun Gu,Hao Zhang
Graphical Light on HER ! Through regulating the structures of semiconducting nickel phosphides, their efficiency of room-temperature catalytic hydrogen evolution was remarkably enhanced, which was ascribed to the visible-light-driven synergistic effect of photogenerated electrons and hydroxyl radicals. From the perspective of tailoring the reaction pathways of photogenerated charge carriers and intermediates to remarkably enhance the solar-to-hydrogen energy conversion efficiency, we synthesized the three low-cost semiconducting nickel phosphides Ni 2 P, Ni 12 P 5 and Ni 3 P, which singly catalyzed the hydrogen evolution from ammonia borane (NH 3 BH 3 ) in the alkaline aqueous solution under visible light irradiation at 298 K. The systematic investigations showed that all the catalysts had higher activities under visible light irradiation than in the dark and Ni 2 P had the highest photocatalytic activity with the initial turnover frequency (TOF) value of 82.7 min −1 , which exceeded the values of reported metal phosphides at 298 K. The enhanced activities of nickel phosphides were attributed to the visible-light-driven synergistic effect of photogenerated electrons (e − ) and hydroxyl radicals ( . OH), which came from the oxidation of hydroxide anions by photogenerated holes. This was verified by the fluorescent spectra and the capture experiments of photogenerated electrons and holes as well as hydroxyl radicals in the catalytic hydrogen evolution process.
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JOURNAL OF POWER SOURCES
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2020
·
IF 8.247
Kangkang Bai,Jin-Chen Fan,Peng-Hui Shi,Yu-Lin Min,Qun-Jie Xu
Oxygen evolution reaction (OER) electrocatalysis plays an important role in clean and renewable energy conversion. Designing high-performance OER electrocatalyst is key to the high electrochemical activity. Noble-metal-free electrochemical OER electrocatalysts become the major trend. Herein, we report a facile ball-milling method to prepare red phosphorus (BP)-black phosphorus (BP)/expended graphite (EG) toward OER electrocatalysis. By virtue of the high temperature and shearing force generated in the ball-milling process, a portion of red phosphorus can be in-situ transferred into chemical active BP and formed the RP-BP heterostructure . Meantime, the EG flakes are cut and exfoliated into defect-rich graphene nanosheets and thin EG flakes, reacting with the RP-BP heterostructure through P–C and P– O –C bonds. The hybridization of RP-BP and EG improves the electroconductivity and facilitate more active electrocatalytic sites toward OER. The results demonstrate that RP-BP/EG heterostructure shows good OER performance with a low overpotential of 328 mV vs. RHE) at a current density of 10 mA cm −2 , lower than commercial IrO 2 (330 mV vs. RHE , 10 mA cm −2 ). A very small Tafel slope of 58 mV·dec −1 indicates the high electron transmission on the RP-BP/EG catalyst. The stable structure of RP-BP/EG provides the long-term durability of the RP-BP/EG catalysts in OER.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
·
IF 16.683
Taiping Hu,Kai Dai,Jinfeng Zhang,Shifu Chen
Step-scheme (S-scheme) photocatalytic system has been considered as an effective method for solar energy conversion by utilizing broadband solar energy, realizing easy separation of photoexcited carriers and strong redox ability. Herein, the novel ternary Ni 2 P cocatalysted two-dimensional (2D)/2D SnNb 2 O 6 /CdS-diethylenetriamine (SNO/CdS-D) system was designed and fabricated. The S-scheme SNO/CdS-D heterostructure gives photocatalytic hydrogen production of 7808 μmol g −1 h −1 , which is about 130.13 and 2.35 times stronger than that of SNO and CdS-D. Further, noble-metal-free Ni 2 P cocatalyst is decorated into SNO/CdS-D heterostructure, the photocatalytic hydrogen evolution performance could be enhanced to 11,992 μmol g −1 h −1 . Additionally, XPS analysis and DFT calculation revealed the carriers moves from CdS-D to SNO and then to Ni 2 P in the Ni 2 P-SNO/CdS-D nanocomposite. This work will give a reliable and clear insight into the interface and surface design of the 2D catalysts and offer a broadband photocatalytic hydrogen evolution process without noble metal cocatalysts.
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EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2020
·Vol. 2020
·期 9
·773-779
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IF 2.529
Shuting Zhu,Qingshuang Liang,Yating Xu,Hanping Fu,Xiufeng Xiao
Graphical A facial one-step solvothermal synthesis of black phosphorus (BP) nanosheets from red phosphorus under common laboratory conditions is developed. The efficiency of the phase transition is very high, and the obtained BP nanosheets can be up to 2.1 g for one batch. The as-prepared BP nanosheets show highly efficient photocatalytic performance. In this work, we report a facial one-step solvothermal synthesis of BP nanosheets from red phosphorus based on common laboratory conditions at low temperature. This bottom-up approach for the direct preparation of BP nanosheets can be up to 2.1 g for one batch and the efficiency of the phase transition is up to 100 %. The as-prepared BP nanosheets show highly efficient photocatalytic performance. Its efficiency of photocatalytic hydrogen evolution from water is 40.6 times higher than that of red phosphorus precursor and is close to the well-known C 3 N 4 nanosheets. Therefore, we firmly believe that this facile, scalable, and low-cost approach opens a new route to prepare black phosphorus nanosheets and will take a step to the rapid development and applications of this unique 2D material.
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Journal of Energy Chemistry
·
2020
·
IF 7.216
Xiao Liu,Peijie Fan,Liangping Xiao,Jian Weng,Qingchi Xu,Jun Xu
The generation of green hydrogen (H 2 ) energy is of great significance to solve worldwide energy and environmental issues. Reduced Ti based photocatalyst has recently attracted intensive attention due to its excellent photocatalytic activity, while the synthesis of reduced Ti based photocatalysts with high stability is still a great challenge. Here, we report a facile method for synthesis of reduced Ti metal organic frameworks (small amounts of Pt incorporated) encapsulated BP (BP/R-Ti-MOFs/Pt) hybrid nanomaterial with enhanced photocatalytic activity. The strong interaction between Ti and P reduces the valence state of the binding Ti 4+ on the BP surface, forming abundant reduced Ti 4+ within R-Ti-MOFs/BP. Such reduced Ti 4+ render R-Ti-MOFs/BP efficient charge transfer and excellent light absorption capability, thus promote the photocatalytic H 2 production efficiency. Furthermore, the Ti-P interaction stabilizes both reduced Ti 4+ and BP during the photocatalytic reaction, which greatly enhanced the stability of the obtained BP/R-Ti-MOFs/Pt photocatalyst.
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