INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2019
·
IF 4.084
Qinghe Cao,Chuanqin Wang,Shujie Chen,Xingdong Xu,Fenggang Liu,Xinhua Geng,Jiahai Wang
Chemically polished Ti foil has been shown to be an excellent substrate for the growth of low-interface-resistance electrocatalysts . Herein, we grow vertically aligned interlaced-mesh-network NiP 2 nanosheets on deeply polished Ti foil (NiP 2 NS/Ti) by the gas-phase phosphidation of Ni(OH) 2 . The produced interconnected nanosheets provide abundant electron transfer pathways and facilitate electron transfer, as confirmed by electrochemical impedance spectroscopy measurements and the presence of numerous voids that allow for fast gas release and ion migration. In view of the above advantages, the NiP 2 NS/Ti shows high electrocatalytic activity for the hydrogen evolution reaction in both alkaline and acidic solutions, wherein overpotentials of only 134 and 140 mV are required to attain a current density of 10 mA cm −2 , respectively. In addition, the above electrode also features a small Tafel slope (60.5 mV dec −1 in alkaline and 49.5 mV dec −1 in acidic solutions) and long-term stability, and can therefore be employed as an efficient and cheap three-dimensional cathode for electrochemical water splitting.
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高影响因子
ACS Applied Materials & Interfaces
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2019
·
IF 8.456
Yifan Xu,Feng Ren,Hanghang Liu,Hao Zhang,Yaobao Han,Zheng Liu,Wenliang Wang,Qiao Sun,Chongjun Zhao,Zhen Li
Black phosphorus (BP) nanostructures with unique layer-dependent properties have been extensively applied in the fields of electronic devices, energy conversion and storage, and nanomedicine. As a narrow band gap semiconductor, they are expected to show strong second near-infrared (NIR-II) fluorescence. However, there is no report on the NIR-II fluorescence of free-standing BP nanostructures, which have great potential in the NIR-II fluorescence bioimaging because of their excellent biocompatibility and biodegradability. Here, for the first time, we report that the BP nanoparticles modified with cholesterol exhibit strong NIR-II fluorescence and can be encapsulated with the PEGylated lipid to form BP@lipid-PEG nanospheres for in vitro and in vivo NIR-II imaging. The resultant BP@lipid-PEG nanospheres exhibit broad emissions from 900 to 1650 nm under excitation by an 808 nm laser and have 8% quantum yield of that of standard dye IR-26. We also show that the NIR-II fluorescence image acquired with emission beyond 1400 nm has the sharpest contrast and can be used to in situ measure the diameter of blood vessels. In addition to NIR-II fluorescence imaging, we also show the potential of BP@lipid-PEG nanospheres in photoacoustic (PA) imaging. Both the long-wavelength NIR-II fluorescence imaging and PA imaging reveal that the as-fabricated BP@lipid-PEG nanospheres can be gradually metabolized by the liver in 48 h, thus making them promising for bioapplications.
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高影响因子
APPLIED SURFACE SCIENCE
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2019
·
IF 5.155
Taiping Hu,Kai Dai,Jinfeng Zhang,Guangping Zhu,Changhao Liang
Inorganic-organic hybrid materials, a class of probable candidates for combining two counterparts into one structure could be beneficial for improving or combing the excellent electronic, magnetic, rigidity and thermal stability, and optical feathers of inorganic frameworks with diverse structure, processability, flexibility and good geometric controllability of organic molecules. Anchoring inorganic-organic hybrid materials with cocatalysts is a usually used strategy for enhancing their catalytic performance. However, noble metal cocatalysts always limit their practical application. Herein, we report that noble metal free cocatalyst of Ni 2 P decorated CdS-diethylenetriamine (CdS-DETA) can effectively overcome this limitation to achieve highly photocatalytic hydrogen production . The rapid microwave solvothermal synthesis of CdS-DETA (MCdS-DETA) process shortens reaction time, saves energy and lead to achieve highly photocatalytic activity due to its low crystallinity . When Ni 2 P decorated MCdS-DETA, The 0.4%Ni 2 P/MCdS-DETA exhibited the highest photocatalytic hydrogen evolution activity (6836 μmmol h −1 g −1 ), which is 4.14 times, 2.06 times and 1.34 times higher than traditional solvothermal CdS-DETA(TCdS-DETA), MCdS-DETA and Pt cocatalysted MCdS-DETA, respectively. The method reported here can be extended to other inorganic-organic hybrid materials, and develops new strategies for exploring inorganic-organic hybrid-based photocatalysts .
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CHEMISTRY OF MATERIALS
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2019
·
IF 10.159
Tongtong Yu,Shanpeng Wang,Xiang Zhang,Chenning Li,Jie Qiao,Ning Jia,Bing Han,Sheng-Qing Xia,Xutang Tao
Mid-infrared (MIR) nonlinear optical (NLO) crystals are crucial in generating MIR lasers, which are important in civilian and military applications. Compared to the extensively investigated ternary and quaternary chalcogenide NLO crystals, ternary phosphide crystals have a large nonlinearity coefficient and a wide transparency range. For instance, the well-known ternary chalcopyrite phosphide NLO crystal, ZnGeP2, possesses a large nonlinearity coefficient (deff = 75 pm/V) and a broad transmittance range of 0.75–12 μm. However, its applications in the far-infrared laser range were hindered by its strong absorption near 9 and 10–12 μm. Here, considering that Mn2+ not only makes contributions to large second-harmonic generation (SHG) response but also extends the transparency wavelength range, a new ternary chalcopyrite phosphide crystal, MnSiP2 (MSP), was rationally designed by substituting a II-site metal (Zn or Cd) for Mn in the II-Si-P2 family. In this work, the synthesis and single-crystal growth of MSP were systematically investigated. The theoretical and experimental characterizations demonstrated that MSP exhibits a good balance between strong SHG behavior (6 × AgGaS2) and large laser damage threshold (about 70 MW/cm2). Specifically, the long-wavelength MIR cutoff edge of MSP is 18.2 μm, and the outstanding terahertz (THz) transmittance covers the range of 0.4–2.0 THz, indicating the ultrabroad transparency range. This work may provide a feasible strategy and impel one to search for promising outstanding MIR NLO crystals in the ternary phosphide family.
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SENSORS AND ACTUATORS B-CHEMICAL
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2019
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IF 6.393
Peng Yu,Yuanming Zhai,Rui-Ying Bao,Zheng-Ying Liu,Ming-Bo Yang,Wei Yang
In chemical industry, elemental sulfur (S) is widely used and always causes environmental and pollution concerns. Hence, the rapid and simple detection of S has become an important issue. In this work, we report an effective approach for visible determination of S. The color of the detection reagent, which was readily prepared by mixing N, N-Dimethylformamide and hydrazine hydrate in a certain ratio, changes from colorless to blue and gradually fades after getting in contact with trace S. The detection reagent can be used for repeated S detection because of the color fading behavior. By measuring the characteristic absorption intensity during detection or the fading time of the mixture, the content of S in the sample can be readily determined and the detection limit can be as low as 0.32 mg/L. An unstable chromogenic organic clathrate generated during detection was found to be responsible for the chromogenic reaction, as revealed by UV–vis, FTIR, NMR, high resolution mass spectrometry measurements and simulation. Thus, this work presents a simple, fast and device-independent approach that can realize semi-quantitative detection of trace S in water, alcohol, food and environmental samples.
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DRUG METABOLISM AND DISPOSITION
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2019
·Vol. 47
·期 6
·582-591
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IF 3.354
Mengru Bai,Qingquan Zeng,Yingchun Chen,Mingyang Chen,Ping Li,Zhiyuan Ma,Dongli Sun,Hui Zhou,Caihong Zheng,Su Zeng,Huidi Jiang
l-Carnitine (l-Car) plays a crucial role in fatty acid β-oxidation. However, the plasma l-Car concentration in women markedly declines during pregnancy, but the underlying mechanism and its consequences on maternal hepatic β-oxidation have not yet been clarified. Our results showed that the plasma l-Car level in mice at gestation day (GD) 18 was significantly lower than that in nonpregnant mice, and the mean fetal-to-maternal plasma l-Car ratio in GD 18 mice was 3.0. Carnitine/organic cation transporter 2 (OCTN2) was highly expressed in mouse and human placenta and upregulated as gestation proceeds in human placenta, whereas expressions of carnitine transporter (CT) 1, CT2, and amino acid transporter B0,+ were extremely low. Further study revealed that renal peroxisome proliferator–activated receptor α (PPARα) and OCTN2 were downregulated and the renal l-Car level was reduced, whereas the urinary excretion of l-Car was lower in late pregnant mice than in nonpregnant mice. Meanwhile, progesterone (pregnancy-related hormone) downregulated the expression of renal OCTN2 via PPARα-mediated pathway, and inhibited the activity of OCTN2, but estradiol, corticosterone, and cortisol did not. Unexpectedly, the maternal hepatic level of l-Car and β-hydroxybutyrate (an indicator of mitochondrial β-oxidation), and mRNA levels of several enzymes involved in fatty acid β-oxidation in GD 18 mice were higher than that in nonpregnant mice. In conclusion, OCTN2 mediated l-Car transfer across the placenta played a major role in maternal plasma l-Car reduction during pregnancy, which did not subsequently result in maternal hepatic fatty acid β-oxidation decrease.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2019
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IF 4.084
Shuai Liu,Cun Hu,Chao Lv,Jinguang Cai,Ming Duan,Junhong Luo,Jiangfeng Song,Yan Shi,Changan Chen,Deli Luo,Akira Watanabe,Eiji Aoyagi,Shun Ito
Metal phosphide structures have been widely explored for electrocatalytic hydrogen evolution reaction (HER) owing to their high activity and durability, and the phosphidation reaction is very important for the preparation of metal phosphides. In this paper, we reported a facile, effective, and practical phosphidation strategy to prepare nickel phosphide structures by placing a Ni foam above the red phosphorus powder with a distance of 1 cm in a covered crucible. As-prepared self-supported hierarchical Ni 5 P 4 /NiP 2 biphase porous nanosheets exhibited an excellent HER activity. The overpotential for a current density of 10 mA/cm 2 and the Tafel slope are as low as 92 mV and 52.8 mV/dec, respectively, both of which are much better than those delivered by the Ni 5 P 4 nanosheets prepared by the conventional carry-gas upstream-downstream method. The complete phosphidation reaction, high electrochemically active surface area, and the Ni 5 P 4 /NiP 2 biphasic synergistic effect account for the outstanding HER performance. Moreover, the porous Ni 5 P 4 /NiP 2 nanosheets exhibited excellent stability under both accelerated degradation test and long-term durability test. Besides, this method can be employed to prepare large-area self-supported hierarchical porous Ni 5 P 4 /NiP 2 nanosheets with nearly same HER activities and long-term stability, suggesting a high potential for practical application.
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ChemElectroChem
·
2019
·Vol. 6
·期 17
·4689-4695
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IF 3.975
Yuqing Gao,Qiang Ru,Yang Liu,Shikun Cheng,Li Wei,Francis Chi-Chung Ling,Fuming Chen,Xianhua Hou
Graphical Seeing red : Benefitting from the controllable interplanar spacing of MoS 2 and the high theoretical capacity provided by red phosphorus (RP) particles, the mosaic RP/MoS 2 (2 : 1) hybrid synthesized by a simple ball-milling approach delivers impressive electrochemical performance for potassium-ion batteries (KIBs). This study provides a new insight into developing the rational design of novel anode alternatives for KIBs. Low-cost, non-toxic, and abundant red phosphorus (RP) with high gravimetric discharge/charge capacity has been recognized as a promising anode candidate for potassium-ion batteries (KIBs). However, the large volumetric change, severe agglomeration, and rapid capacity attenuation during discharge/charge cycles are major obstacles for practical applications in potassium-ion storage. In order to eliminate such intrinsic deficiencies, a mosaic RP/MoS 2 hybrid is designed and prepared by using a simple ball-milling method and subsequently used as an anode for KIBs. The hybrid with a certain ratio of 2 : 1 can achieve a sustainable K + storage capability (246.6/239.6 mAh g −1 for 100 cycles at 50 mA g −1 ), considerable long-cycle performance (120.5/118.0 mAh g −1 at 1000 mA g −1 after 500 cycles), and good rate capability. The cycling performance is attributed to a pseudocapacitive effect, controllable interlayer spacing of MoS 2 , and enhanced conductivity. In view of the scalable synthesis process and considerable cycling durability, the RP/MoS 2 hybrid may shed light on the rational design of novel anode alternatives for KIBs.
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APPLIED SURFACE SCIENCE
·
2018
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IF 4.439
Keke Xu,Xiuli Fu,Hong Li,Zhijian Peng
Enhancing the electrocatalytic activity of transition metal phosphides (TMPs) for hydrogen evolution has become an attractive way for noble-metal-free electrocatalysts. In this work, a novel composite of network-like tungsten phosphide nanostructures on carbon fibers (CFs@WP) was prepared by a two-step high-temperature calcination strategy. Owing to the high electrochemical active surface area originating from the WP nanostructures of network-like morphology and the enhanced conductivity caused by the introduction of carbon fibers, the obtained CFs@WP composite, as an integrated hydrogen evolution cathode, exhibits much higher electrocatalytic activity for hydrogen evolution than pure WP nano-/micro-particles after toasting their corresponding suspension onto bare CFs. This catalyst could, in 0.5 mol·L −1 H 2 SO 4 , deliver a current density of 10 and 100 mA·cm −2 respectively at the over-potential of merely 137 mV and 215 mV, and present a small Tafel slope of 69 mV·dec −1 as well as excellent stability at various current densities, although it may exhibit relatively inferior catalytic activity in hydrogen evolution in neutral and alkaline conditions. The present strategy may also offer a straight-forward model to enhance the hydrogen evolution activity of other TMPs catalysts.
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Optical Materials Express
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2019
·Vol. 9
·期 2
·423-434
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IF 2.673
Xinying Ding,Zhan Wei,Ying Chen,Pengcheng Lin,Qi Yan,Yufeng Fan,Xiaodan Chen,Zhengdong Cheng
Understanding the dispersion state of 2D black phosphorus (BP) nanosheets is of great significance for the application of BP based materials. However, the dispersion state of BP colloids cannot be analyzed by the conventional methods based on the optical signal detecting due to the intensive light absorption of BP in the ultraviolet-visible region and the high turbidity caused by the aggregation of pristine BP nanosheets. In this work, 3D light scattering has been proven to be an effective technique to characterize the dispersion characteristics of nanocolloids with intensive light absorption and limited dispersity by suppressing multiple scattering. The effect of the concentration, the temperature and the solvent on the dispersion stability of BP nanosheets has been systematically studied by modulated 3D cross-correlation. It has been shown that measurements at smaller angles can obtain better autocorrelation functions. The BP colloids exhibit excellent colloidal stability when the concentration is below 250 μgmL−1, above which aggregation tends to form. Increasing the temperature has shown to result in the formation of aggregation in the colloids. BP nanosheets possess better dispersion state in polar solvents than in nonpolar solvents, and the aggregation process in nonpolar solvents can be monitored by the slow relaxation mode of 3D light scattering. This study indicates that 3D light scattering paves way to analyze the dispersion dynamics of various 2D nanoparticle colloids with intensive light absorption and poor dispensability.
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高影响因子
ACS Applied Bio Materials
·
2018
·
IF 0
Caixia Sun,Yifan Xu,Lijuan Deng,Hao Zhang,Qiao Sun,Chongjun Zhao,Zhen Li
Black phosphorus (BP) nanostructures have been receiving enormous attention in diverse bioapplications owing to their unique physicochemical properties. However, it is still challenging to investigate their blood circulation, biodistribution, and pharmacokinetics after administration due to the difficulty in quantifying them. Here, we report the quantification of blood circulation, biodistribution, and pharmacokinetics of dextran-modified BP nanoparticles (i.e., BP-DEX NPs) in balb/c mice through the highly sensitive noninvasive photoacoustic (PA) imaging and single-emission computed tomography/computed tomography (SPECT/CT) imaging. We first prepare water-soluble and biocompatible small BP-DEX NPs and label them with radioisotopes 99mTc. We then quantify their half-lives of distribution and elimination phases to be 0.2 and 9.5 h by counting the γ-emissions in the blood of mice administrated with BP-DEX NPs. We also show the dynamic variation of BP-DEX NPs in the tumor, liver, spleen, and kidney through in vivo PA imaging and illustrate the accumulation of nanoparticles in major organs by SPECT/CT imaging, which follows an order of spleen > liver > lung > kidney. Our work demonstrates the renal clearance and hepatobiliary excretion of BP-DEX NPs, which could be potentially translated for clinical in vivo imaging and therapy of cancer.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2018
·
IF 3.779
Dmitrii Rakov,Yuzhi Li,Siqi Niu,Ping Xu
Recently reported transition metal phosphosulfide (MPS 3 or MPS) nanosheets (NSs) demonstrated outstanding activity towards hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), and proper doping of a second transition metal might even enhance the catalytic activity. By considering the oxophilicity of the doping element, here we demonstrate the Mn (with higher oxophilicity) and Ni (with lower oxophilicity) doping of Ni 1- x Mn x PS 3 and Mn 1- x Ni x PS 3 NSs on their HER and OER activity in alkaline solution. It is found that non-substituted NiPS 3 NSs show better catalytic activity than their Mn-doped samples. On the contrary, Ni doping into MnPS 3 NSs significantly improves the electrocatalytic performance. This work may substantially expand the understanding of the role of elemental oxophilicity on the electrochemical water splitting activities of Ni/Mn based catalysts.
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