Applied Materials Today
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2022
·
IF 8.663
Yan Zhang,Shao-Yu Yuan,Yang Zou,Tian-Tian Li,Hong Liu,Jian-Jun Wang
The inherent drawbacks of severe charge recombination and poor conductivity of hematite (α-Fe 2 O 3 ) are still the obstacles for its applications. Herein, we report the integration of NiSe 2 nanoparticles on the surface of Fe 2 O 3 films for the photoelectrochemical (PEC) water oxidation. The resulting heterostructure photoanode exhibited significantly enhanced PEC performance with a current density enlarged by 50%. The investigations on mechanism reveals that a built-in electric field was formed to accelerate the charge transfer and separation, the charge carrier concentration was significantly enhanced by the formation of oxygen vacancies induced by NiSe 2 , the lifetime of photogenerated electrons and holes were substantially prolongated due to the suppression of recombination by the surface passivation and promoted surface kinetics for water oxidation by of Se-O species. This work brings inspiration to integrate multifunctional modifiers on photoelectrodes that allows for addressing several issues simultaneously and consequently improving the PEC performance for hydrogen production via water splitting.
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ANALYTICAL CHEMISTRY
·
2022
·
IF 8.008
Qianqian Zhao,Wenkai Zhu,Wenrong Cai,Junyao Li,Datong Wu,Yong Kong
Chiral analysis is of significant importance for living organisms since chirality is the fundamental phenomenon in nature. In this work, a bifunctional electrochemiluminescent (ECL) platform is constructed for chiral discrimination and chiral sensing. 3-Mercaptopropionic acid-functionalized CdSe quantum dots (CdSe QDs) are combined with aminated TiO2 nanotubes (NH2-TiNTs) via amidation. The resultant CdSe QDs/TiNTs display significantly enhanced ECL signals due to the synergistic effect between CdSe QDs and TiNTs, which are then used for the chiral discrimination of the isomers of nine chiral amino acids (AAs) in the presence of d-AA oxidase (DAAO). DAAO can selectively catalyze the oxidation of d-AAs to generate H2O2, which acts as the coreaction reagent and triggers the ECL signals of CdSe QDs/TiNTs, and thus, the isomers of the nine chiral AAs can be effectively discriminated. In addition, the as-constructed ECL platform can also be used for the sensitive detection of d-AAs in the presence of DAAO with a wide linear range and a low limit of detection. These findings suggest that the CdSe QDs/TiNTs can work as a bifunctional ECL platform (chiral discrimination and chiral sensing), which might be an advanced ECL platform for biomedical applications.
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CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Jun Wang,Justin Liu,Dao-Qiang Lu,Lijing Chen,Rujia Yang,Dahai Liu,Bin Zhang
In this paper, we report a simple approach to fabricate diselenide-crosslinked carboxymethyl chitosan nanoparticles (DSe-CMC NPs) for doxorubicin (DOX) delivery, with disulfide analogs (DS-CMC NPs) as control. DS-CMC NPs and DSe-CMC NPs featured a spherical morphology and narrow size distribution with the average size about 200 nm. Carboxymethyl chitosan (CMC) as the starting material not only improved the biocompatibility of the nanocarriers but also enhanced physiological stability. Due to electrostatic interactions between DOX and CMC, the nanoparticles had high drug encapsulation efficiency (∼25 %). The nanoparticles disintegration and drug release were accelerated by the cleavage of diselenide bonds through oxidation by H 2 O 2 or reduction by GSH. In vitro cell experiments revealed that DOX-loaded DSe-CMC NPs possessed the highest drug accumulation and cytotoxicity in tumor cells. Moreover, DOX-loaded DSe-CMC NPs performed the enhanced growth inhibition in vivo than that of DS-CMC NPs. Thus, the diselenide-crosslinked nanoparticles possess great potentials for DOX delivery.
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Materials Advances
·
2022
·Vol. 3
·期 18
·7037-7042
·
IF 0
Xiaoli Zhang,Yajun Lou,Lei Hu,Weijia Duan,Guojie Chen,Bingfeng Fan,Weiren Zhao,Xinhai Zhang
InP-based quantum dots (QDs) have attracted considerable interest in the optoelectronic field owing to their favorable properties. However, to date, the nonlinear optical properties and ultrafast photonics applications of InP-based QDs have rarely been explored. In this study, InP/ZnSe/ZnS QDs with surface fluorination treatment (InP-HF) have been fabricated. Consequently, the nonlinear saturable absorption properties of such InP-HF QDs with surface modification are explored by realizing a modulation depth of 3.27% and a saturable intensity of 1.10 MW cm−2. We report on the passive Q-switching of a diode-pumped Nd:YVO4 near-infrared laser at 1064 nm (∼1.0 μm) using InP-HF QDs as a SA. At this wavelength, the threshold of pump power is as low as 1 W, and the maximum average output power and the shortest pulse widths are 2.5 W and 178 ns, respectively. The laser results suggest that surface fluorination treated InP-HF QDs could be very promising for generating ultrashort pulse visible lasers.
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Ao Zhou,Ruitong Chi,Rong Liu,Yingjie Shi,Zhixiao Zhang,Hongwei Che,Guangsuo Wang,Jingbo Mu,Yanming Wang,Xiaorong Zhang
In this study, Se doped nickel-cobalt sulfide (Se–NiCoS) nanotube arrays with three-dimensional (3D) networks are prepared on nickel foam via a facile hydrothermal method combined with selenide reaction. The 3D networks are formed by interconnected nanosheets grown on the surface of nanotubes. Results show that the dopant amount of Se in nickel-cobalt sulfide (NiCoS) has obvious effects on both the structure and performance of the Se–NiCoS. The combined contribution of Se dopant and the unique 3D network structure can greatly improve the electrochemical performance of NiCoS. Compared with the pristine NiCoS nanotube array, the Se–NiCoS nanotube arrays demonstrate enhanced areal capacitance (2.00 and 1.48 F cm −2 at 1 and 20 mA cm −2 , respectively) and cyclic stability (capacitance retention rate of 91.2% after 5000 cycles at 5 mA cm −2 ). Furthermore, the hybrid supercapacitor assembled with Se–NiCoS nanotube arrays and carbon nanotubes (CNTs) as positive electrode and negative electrode can deliver an energy density of 37.7 Wh kg −1 at a power density of 798.4 W kg −1 . This study indicates that the 3D network structured Se–NiCoS nanotube arrays have a good practical application value in supercapacitor devices.
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Nanomaterials
·
2022
·Vol. 12
·期 13
·2288
·
IF 5.719
Chenyu Zhu,Qiao Wang,Guorong Sun,Suo Zhao,Yao Wang,Tonghui Li,Xianglong Hao,Mikhail Artemyev,Jianguo Tang
In this paper, hydrophobic luminescent CdSe quantum dots are successfully dispersed in a mixture of styrene and methyl methacrylate through the oleic to methacrylic acid ligand exchange. Further in situ solution polymerization of the quantum dots in a mixture of styrene and methyl methacrylate followed by electrospinning allowed us to prepare luminescence hybrid styrene-co-methyl methacrylate fibers embedded with quantum dots. CdSe@P(S+MMA) hybrid fibers with 27% quantum yield showed excellent moisture, heat and salt resistance with a photoluminescence output below 120 °C. When dry heated, the hybrid fibers of the fluorescence signals decreased with temperature to 79%, 40%, 28%, 20% and 13% at 120 °C, 140 °C, 160 °C, 180 °C and 200 °C, respectively, due the to the chemical degradation of CdSe QDs. Such hybrid fibers show the potential to manufacture wearable moisture- and heat-sensing protective clothing in a 120–200 °C range due to the thermal-induced quenching of quantum dot photoluminescence.Keywords:CdSe;polymer;hybrid fibers;photoluminescence thermal sensor
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高影响因子
Chinese Physics B
·
2022
·Vol. 31
·期 7
·078102
·
IF 1.652
Zhangyu Gu,Yisong Fan,Yixing Ye,Yunyu Cai,Jun Liu,Shouliang Wu,Pengfei Li,Junhua Hu,Changhao Liang,Yao Ma
Non-stoichiometric copper selenide (Cu2 – xSe, x = 0.18 ∼ 0.25) nanomaterials have attracted extensive attentions due to their excellent thermoelectric, optoelectronic and photocatalytic performances. However, efficient production of Cu2 – xSe nanoparticles (NPs) through a green and convenient way is still hindered by the inevitable non-environmentally friendly operations in common chemical synthesis. Herein, we initially reveal the coexistence of seleninic acid content and elemental selenium (Se) NPs in pulsed laser-generated Se colloidal solution. Consequently, we put forward firstly a closed-cycle reaction mode for totally green production of Cu1.8Se NPs to exclude traditional requirements of high temperature and toxic precursors by using Se colloidal solution. In such closed-cycle reaction, seleninic acid works as the initiator to oxidize copper sheet to release cuprous ions which can catalyze the disproportion of Se NPs to form {{\rm{SeO}}}_{3}^{2-} and Se2– ions and further produce Cu2 – xSe NPs, and the by-product {{\rm{SeO}}}_{3}^{2-} ions promote subsequent formation of cuprous from the excessive Cu sheet. In experiments, the adequate copper (Cu) sheet was simply dipped into such Se colloidal solution at 70 °C, and then the stream of Cu1.8Se NPs could be produced until the exhaustion of selenium source. The conversion rate of Se element reaches to more than 75% when the size of Se NPs in weakly acidic colloidal solution is limited between 1 nm and 50 nm. The laser irradiation duration shows negative correlation with the size of Se NPs and unobvious impact to the pH of the solution which both are essential to the high yield of Cu1.8Se NPs. Before Cu sheet is exhausted, Se colloidal solution can be successively added without influences to the product quality and the Se conversion rate. Such green methodology positively showcases a brand-new and potential strategy for mass production of Cu2 – xSe nanomaterials.
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JOURNAL OF MATERIALS RESEARCH
·
2022
·Vol. 37
·期 19
·3308-3317
·
IF 2.909
Wu Meng,Li Qifei,Cheng Siling,Yao Kaitong,Liu Lin,Jiang Yu,Feng Yuezhan,Rui Xianhong,Yu Yan
Sodium-ion batteries (SIBs) are considered as potential substitute in large-scale energy storage systems due to the abundant natural resources and low price of sodium, and environmental friendliness. However, commercial graphite anode in lithium-ion batteries cannot be directly applied to SIBs. Bimetallic selenides stand out among the many anode materials owing to their rich redox chemistry and superior conductivities. Here, a bimetallic selenide Cu 3 VSe 4 is successfully prepared via one-pot reaction in oil phase, and its energy storage performance for SIBs is investigated. It delivers an impressive capacity, excellent rate performance (298 mAh g −1 at 10 A g −1 ), and outstanding long-term cycling life (305 mAh g −1 over 1000 cycles at 2.0 A g −1 ). In addition, the Na + storage mechanism (including intercalation and conversion reactions) is revealed. This work provides a new way for the application of the Cu 3 VSe 4 in SIBs. Graphical abstract A bimetallic selenide Cu 3 VSe 4 is successfully prepared via one-pot reaction in oil phase. When it is evaluated as the anode for sodium-ion batteries, the Cu 3 VSe 4 displays an impressive capacity, excellent rate performance, and outstanding long-term cycling life. In addition, the Na + storage mechanism (including intercalation and conversion reactions) is revealed.
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RSC Advances
·
2022
·Vol. 12
·期 33
·21558-21566
·
IF 4.036
Chen Chen,Qilin Hu,Fan Yang,Hongyu Xue,Yuning Zhang,Hailong Yan,Yang Lu,Yongsong Luo
Due to the low price and abundant reserves of sodium resources, sodium-ion batteries have become the main candidate for the next generation of energy storage equipment, particularly for large-scale grid storage and low-speed electric vehicles. Transition metal selenides have attracted considerable attention because of their high reversible capacity, superior electrical conductivity and versatile structures. In this study, two-dimensional CuSe nanosheets are synthesized via a simple hydrothermal reaction. When acting as an electrode material for sodium-ion batteries, the CuSe electrode exhibits an initial coulombic efficiency of 96.7% at a current density of 0.1 A g−1 and a specific capacity of 330 mA h g−1 after 100 operation cycles, as well as retains a specific capacity of 211 mA h g−1 even at a high current density of 10 A g−1. Moreover, the anode delivers a specific capacity of 236 mA h g−1 after 3300 cycles at 5 A g−1 with a capacity retention of 91.2%. In sodium-ion hybrid capacitors (SHICs) with the two-dimensional CuSe nanosheets and Ti3C2Tx MXene as the negative and positive materials, respectively, the nanosheets without any pre-sodiation present a lifespan of up to 2000 cycles at 2 A g−1 and a capacity retention of about 77.7%.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Tiantian Li,Kaige Liu,She Wang,Zhihang Liu,Guizhen Liao,Zhenyu Chen,PeiKang Shen
Lithium-sulfur batteries (LSBs) have enormous application potential in the flexible energy storage field due to their large theoretical specific capacities and high energy densities. However, lithium-sulfur batteries face a notorious shuttle effect problem. To address this challenge, this work reports a three-dimensional (3D) structure of binary transition metal selenides (B-TMSe) hierarchical composites (CC/NiCoSe 2 -NiO) on carbon cloth as a self-supporting sulfur host for flexible LSBs. According to the density functional theory (DFT) calculations, NiCoSe 2 can exert a synergetic effect of high affinity with Lithium polysulfides (LiPSs) and electrocatalytic activity to lower the adsorption energy barrier and accelerate the sluggish reaction kinetics of polysulfides. Consequently, the CC/NiCoSe 2 -NiO-based electrodes realize a large specific capacity of approximately 1363 mAh/g at a current density of 0.1C, excellent rate performance (454.66 mAh/g at 5C) and a reversible specific capacity of 978.9 mAh/g at 1C, along with impressive cycling stability with an attenuation rate of 0.038% per cycle for 1000 cycles. They also achieve a large reversible cycle capacity of 919.43 mAh/g at 0.2C even at a high sulfur loading (3.5 mg/cm 2 ). With a lean electrolyte (E/S ratio 10 µL/mg) and a high sulfur loading of 2.65 mg/cm 2 , a large capacity of 934.1 mAh/g is retained after 150 cycles at 0.5C. The assembled pouch cells from S@CC/NiCoSe 2 -NiO electrodes show a high initial discharge capacity of 1039.5 mAh/g at 1C at a sulfur loading of 2.65 mg/cm 2 and maintain strong stability under high twisting and buckling.
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高影响因子
Micromachines
·
2022
·Vol. 13
·期 8
·1292
·
IF 3.523
Yuan Ji,Zhenlong Li,Yundan Liu,Xianghua Wu,Long Ren
Co-based compounds have attracted much attention due to their competitive catalytic activities. To enhance their intrinsic electrocatalytic activity, morphology engineering is one of the effective strategies. Hollow structures have fascinating properties due to their low density and high loading capacity. In this work, we introduce a Ga-based liquid alloy as a reactive template for the synthesis of varying Co-based hollow nanoparticles. The fluidity character of the Ga-based liquid alloy facilitates the large-scale production of nanoparticles via a top-down shearing process. The pre-installed active species (here is Zn) in the liquid alloy serve as a sacrificial source to quantitatively reduce Co2+ions and form Co-based compounds. Well-structured Ga/CoOOH core-shell nanospheres are thus successfully prepared, and more varied Co-based hollow nanoparticles can be obtained by post-treatment and reaction. Hollow structures can offer enhanced interfacial area and increased active sites, benefiting the catalytic performance. Among the prepared Co-based catalysts, CoSe2hollow nanoparticles exhibited the best oxygen evolution reaction (OER) activity with an overpotential of 340 mV at the current density of 10 mA/cm2. This work provides a novel strategy for the rational design and simple preparation of hollow nanoparticles.Keywords:liquid metal;hollow structure;transition-metal compounds;electrocatalyst
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Sustainable Energy & Fuels
·
2022
·Vol. 6
·期 15
·3658-3668
·
IF 6.813
Xirui Kong,Yichen Kong,Xiaobin Liao,Sheng Liu,Yan Zhao
Lithium–sulfur batteries (LSB) are regarded as one of the next-generation energy storage systems with a high energy density. However, the shuttle effect of lithium polysulfides (LiPSs) and irreversible consumption of the Li anode prevent the practical application of Li–S batteries. In this work, a mixed tetrahydrofuran (THF) and dipropyl ether (DPE) based electrolyte has been optimized for Li–S batteries. Due to the common-ion effect, the LiPS solubility has been significantly inhibited when the sulfur cathode is operating in a concentrated electrolyte containing an optimized solvent system with weak dissolving power. And no self-discharge effect occurred in the cells with these electrolytes during a 10 day storage. Besides, the coulombic efficiency (CE) for Li deposition/stripping has been improved by optimizing the ratio of dual lithium salts. Impressively, Li‖Cu half-cells can run stably for more than 500 cycles with a high CE (>99.3%). For these reasons, a Li–SeSPAN cell with a L1L2TE-1382 electrolyte demonstrates an excellent capacity retention (>94% after 500 cycles) with an ultrathin (50 μm) Li metal anode. With a good compatibility of the optimized electrolyte for both the Li metal anode and sulfur cathode, this work provides a new design strategy for the electrolyte for lithium–sulfur batteries.
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