Journal of Environmental Chemical Engineering
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2018
·
IF 0
Changchang Ma,Xin Yao,Lu Wang,Zihao Cai,Hai Huang,Xin Gao,Rongru Chen,Yang Liu,Pengwei Huo,Yongsheng Yan
A novel plasmonic photocatalysts of Ag@CdSe/Al 2 TiO 5 was successfully prepared via a simple and mild wet-chemical process. The physical and photophysical properties of the as-prepared Ag@CdSe/Al 2 TiO 5 samples were characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), Ultraviolet–visible diffuse reflection spectroscopy (DRS), photoluminescence emission spectra (PL) and electrochemical impedance spectroscopy (EIS). The interaction between Ag@CdSe and Al 2 TiO 5 has been characterized by X-ray photoelectron spectroscopy (XPS) analysis, and which is facile to the electron transfer between Ag@CdSe and Al 2 TiO 5 and enhancing photocatalytic performance of Ag@CdSe/Al 2 TiO 5 composite photocatalyst. The photocatalytic experiments demonstrat that the Ag@CdSe species can efficiently improve the separation efficiency of photoinducing electrons and holes and consequently improve the methylene blue (MB) photodegradation activity. The 20 wt% Ag@CdSe/Al 2 TiO 5 sample exhibit the most superior photocatalytic activity. A possible photocatalytic mechanism of MB over Ag@CdSe/Al 2 TiO 5 is proposed, which can be attributed the success to the surface plasmon resonance (SPR) effect from Ag/AgCl species.
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MATERIALS RESEARCH BULLETIN
·
2018
·
IF 2.873
Kaimin Huang,Guowu Tang,Qianhang Luo,Guoquan Qian,Li Yang,Fangqiang Yuan,Zhenguo Shi,Qi Qian,Zhongmin Yang
Se 0.5 Te 0.5 semiconductor core optical fibers with phosphate glass cladding were fabricated by using a reactive molten core approach. The core was found to be amorphous with some oxygen diffusing in from the cladding glass. Crystalline Se 0.5 Te 0.5 (c-Se 0.5 Te 0.5 ) semiconductor core fibers were obtained by a post-drawing annealing process. Significant disparities in conductivity under stress and without stress were observed in c-Se 0.5 Te 0.5 semiconductor core fibers. To the best of our knowledge, this is the first time that stress sensing can be realized in c-Se 0.5 Te 0.5 semiconductor core optical fibers. This is in contrast to all previous work on stress sensing using fibers, which require the use of optical probing signals. In addition, it is found that more than 60 times change in conductivity between dark and illuminated states in c-Se 0.5 Te 0.5 semiconductor core fibers. These results demonstrate that c-Se 0.5 Te 0.5 semiconductor core optical fibers have promising applications in stress sensor, photodetector, and optical switch.
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高影响因子
JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Zhitong Jin,Meirong Zhang,Min Wang,Chuanqi Feng,Zhong-Sheng Wang
In quasi-solid-state dye-sensitized solar cells (QSDSSCs), electron transport through a random network of catalyst in the counter electrode (CE) and electrolyte diffusion therein are limited by the grain boundaries of catalyst particles , thus diminishing the electrocatalytic performance of CE and the corresponding photovoltaic performance of QSDSSCs. We demonstrate herein an ordered Co 0.85 Se hollow nanorods array film as the Pt-free CE of QSDSSCs. The Co 0.85 Se hollow nanorods array displays excellent electrocatalytic activity for the reduction of I 3 − in the quasi-solid-state electrolyte with extremely low charge transfer resistance at the CE/electrolyte interface, and the diffusion of redox species within the Co 0.85 Se hollow nanorods array CE is pretty fast. The QSDSSC device with the Co 0.85 Se hollow nanorods array CE produces much higher photovoltaic conversion efficiency (8.35%) than that (4.94%) with the Co 0.85 Se randomly packed nanorods CE, against the control device with the Pt CE (7.75%). Moreover, the QSDSSC device based on the Co 0.85 Se hollow nanorods array CE presents good long-term stability with only 4% drop of power conversion efficiency after 1086 h one-sun soaking.
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高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
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2018
·Vol. 18
·期 1
·288-295
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IF 1.354
Lu Simin,Li Meng,Liu Debao,Yang Yuntao,Yang Ping
A layer-by-layer (LbL) self-assembled method has been developed to create the nano architectonics consisted of quantum dots (QDs) including hydrophobic CdSe/CdZnS and hydrophilic CdTe and Au nanoparticles (NPs) through a functional silica layer as a linker on a slide glass. The glass
layer was created by the hydrolysis of 3-aminopropyltrimethoxysilane (APS), in which the amino group in APS plays an important role for the connection among QDs and Au NPs. UV-vis and PL spectroscopy, scanning electron microscopy, and transmission electron microscopy were employed to characterize.
The result reveals that Au NPs or QDs could be dispersed in the glass slides at a high concentration, and little aggregation. The PL intensity and absorbance is linearly increased with the number of dipping cycles. Furthermore, when the glass layer between Au NPs and CdTe QDs is thin, the
PL of the QDs quenched because of the Plasmon-enhanced fluorescence resonance energy transfer. In contrast, the bright PL of the QDs was observed when the glass layer became thick. The LbL self-assembled glass film shows excellent stability and transparency, which can make a promise for application
in biochemical, optoelectronic, and clinical diagnosis areas.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Xiangrui Meng,Xue Zhan,Hang Xiao,Songtao Li,Xuelian Zhang,Li Ma,Yiyao Liu,Jianyuan Tang
Natural killer (NK) cell-based immunotherapy is a promising approach for treating solid tumors and hematological malignancies. However, its therapeutic efficacy is limited by poor tumor infiltration and suppressive tumor microenvironment. Here, we introduce a rapid, simple, and efficient solution: bovine serum albumin-stabilized ultra-small (4 nm) NK cell nano-engagers, termed Bi 2 Se 3 @BSA nanodots (Nds). These Nds, responsive to high H 2 O 2 levels in tumor cell environments, enhance near-infrared (NIR)-II photothermic immunotherapy. In vitro and in vivo experiments demonstrate their effectiveness in activating photothermal therapy (PTT)-induced immunogenic cell death (ICD), initiating immune cascade reactions, and stimulating immune response activation. By upregulating NKG2D, RAE-1, and secreting cytokines such as IFN-γ and TNF-α, targeted NK cell infiltration is achieved, reversing the immunosuppressive tumor microenvironment and optimizing NK cell cytotoxicity. Transcriptomic analysis confirms the association of immune response activation with the IL-6/JAK2/STAT3 signaling pathway. Notably, combining these nano-engagers with immune checkpoint inhibitors (aPD-1) significantly enhances therapeutic efficacy, facilitating tumor eradication and reducing recurrence risk. Taken together, NK cell nano-engagers inhibit the IL-6/JAK2/STAT3 signaling pathway, target NK cell activation, stimulate immune functions, and improve the immunosuppressive microenvironment. This study presents an alternative strategy for NK cell-based immunotherapy and highlights this promising tool for cancer immunotherapy.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Yuyang Li,Peng Wang,Qiaofu Shi,Fucheng Hu,Xinwei Zhang,Xue Xu,Jun Zhang,Jie Zheng,Yunze Long
Hydrogen production via seawater electrolysis, leveraging sustainable energy sources such as offshore wind or solar energy, has immense application potential. However, the abundance of chloride ions (Cl − ) in seawater leads to the generation of chlorine gas and hypochlorite at the anode during electrolysis, posing a severe threat of corrosion of the catalyst and electrolytic equipment. Herein, we synthesize a NiMo-based catalyst adorned with surface-anchored graphene quantum dots (GQDs). This catalyst possesses excellent Cl − exclusion capabilities. The Mo–NiS/Se@GQDs core–shell nanorod catalyst requires only 170 mV of overpotential to attain a current density of 10 mA cm −2 and operates stably for 200 h without degradation across a broad current density range from 100 to 400 mA cm −2 . This remarkable electrocatalytic stability arises from the dynamic and efficient repulsion of Cl − at the catalytic interface, as proven by the post-reaction analysis of Cl − distribution within the catalyst. Furthermore, a potentiodynamic polarization test revealed that the Mo–NiS/Se@GQDs catalyst has high corrosion potential (0.66 V) and low corrosion current density (122.93 μA cm −2 ), underscoring its excellent corrosion resistance. This research presents a novel approach to mitigate Cl − corrosion during hydrogen production through seawater electrolysis, laying a solid foundation for advancing sustainable energy conversion technologies.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Jiafeng Zhai,Qingfeng Zhang,Ying Yang,Zhihao Wang,Xuan Tang,Shuhong Xie
The development of high-performance potassium-ion batteries (PIBs) necessitates the research of anodes with high capacity, long cycle life, and excellent rate performance. In this study, we drew inspiration from the structure of diatoms in nature. Through a simple self-template pyrolysis process , Se and S were doped into carbon matrix, leading to the synthesis of Se/S-doped diatomite-like carbon microflakes (Se, S-DCMs) for PIBs. The porous surface structure resembling diatoms, along with the interconnected carbon fibers within the pores, enhances contact between material and electrolyte, thereby accelerating diffusion of K + . Furthermore, the co-doping of S and Se introduces defects, creating additional reaction sites and increasing capacity. As anodes for PIBs, Se, S-DCMs exhibits high capacity (414 mAh g −1 after 100 cycles at 100 mA g −1 ) and high-rate performance (198 mAh g −1 at 2000 mA g −1 ). This study represents a promising approach for optimizing carbon structures to boosting battery performance.
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高影响因子
JOURNAL OF POWER SOURCES
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2024
·
IF 8.1
Feng Zhang,Yu Lei,Jiali Liu,Guang Li,Yangcheng Xie,Lingguang Yi,Tianjing Wu,Xianyou Wang
The construction of suitable heterostructures in materials can tune the Fermi energy levels and electron transport rates of materials to achieve attractive oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) properties. In this study, a catalyst anchored in nitrogen-doped carbon nanowires (NCNW) with a heterogeneous interface of Co and CoSe is constructed to realize high-performance ORR and OER bifunctional catalysis. These Co and CoSe heterostructure interfaces can optimize the adsorption of intermediates. The Co/CoSe@NCNW catalyst performs excellent ORR catalytic activity (E 1/2 = 0.89 V), and good OER activity (potential at 10 mA/cm 2 , E j = 10 = 1.55 V). More importantly, the material shows excellent performance in rechargeable zinc-air batteries (ZABs). The open-circuit voltages of 1.47 and 1.50 V and the peak power densities of 122.56 and 74.49 mW/cm 2 in liquid and solid electrolytes, respectively, are superior to those of the ZABs prepared from noble metals. Consequently, the construction of heterogeneous structures can convincingly boost the commercialization of rechargeable ZABs, and be extended to other fields involving ORR and OER.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Chaojiang Fan,Rong Yang,Yun Yang,Yuanyuan Yang,Yong Huang,Yinglin Yan,Lisheng Zhong,Yunhua Xu
Although lithium-sulfur batteries (LSBs) are an attractive next-generation rechargeable battery with high theoretical energy density (2600 Wh kg −1 ) and specific capacity (1675 mA h g −1 ), the shuttle of soluble lithium polysulfides (LiPSs) is still the protruding obstacle to accelerate the redox reaction of LSBs. Here, cubic cobalt diselenide@carbon (CoSe 2 @C) derived from zeolite imidazole framework-67 (ZIF-67) was employed as the functional coating of polypropylene (PP) separator to efficiently adsorb and catalyze polysulfides, inhibit “shuttle effect” and improve the electrochemical reaction kinetics of LSBs. The CoSe 2 @C offers larger mesopore proportion of 77.19 % and abundant active sites to ensure space as a secondary reaction region, and infiltration of electrolyte and rapid transport of Li + . The involved adsorption and catalysis effect are discussed by static adsorption experiment, XPS, and Li 2 S nucleation kinetics analysis. The results show that CoSe 2 @C exhibits strong adsorption effect and catalytic activity on LiPSs, and CoSe 2 @C/PP cells display fast Li + diffusion and improved redox kinetics (high Li 2 S nucleation peak current of 0.27 mA and deposition capacity of 148.46 mA h g −1 ). Ascribe to these advantages, the CoSe 2 @C/PP cell provides an initial discharge specific capacity of 1335.01 mA h g −1 at 0.1 C and a fine reversible capacity at 5.0 C, and achieves stable and durable lifespan with an average capacity decay rate of 0.12 % over 400 cycles at 0.5 C. This work could promote the practical application of metal selenides in the key components and devices for LSBs.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 10
·1-10
·
IF 2.8
Niu Shengtao,Xu Zhiqiang,Kang Xiaoya,Zhao Lei,Zou Rong,Liu Wenwu,Ran Fen
The problematic polysulfide shuttle effect, slow redox kinetics of lithium polysulfides conversion, and low conductivity impede the prospects of lithium-sulfur battery applications. To address these issues, a unique rod-like CoSe 2 nanoparticle decorated flake MXene (MXene@CoSe 2 ) emerges as a promising host material for the design of advanced batteries. Here, we use a hydrothermal synthesis strategy to grow CoSe 2 nanorods in situ on the surface of flake MXene. By comparing the electrochemical properties of MXene@CoSe 2 electrodes with Mxene@Co electrodes, it is determined that the MXene@CoSe 2 electrode could adsorb lithium polysulfides more efficiently while accelerating the redox kinetics of lithium polysulfides to suppress the shuttle effect. As a result, the initial specific capacity at Mxene@CoSe 2 cathode could reach 1, 050.6 mAh g −1 at 0.1 C, which reaches 560.8 mAh g −1 after 100 cycles and remains at 492.9 mAh g −1 after 1, 000 cycles at 1 C, with a low average decay rate of 0.302% per cycle.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Zhongjie Cui,Shuaitao Qin,Haiyang He,Jinchan Zhao,Rui Jiang,Yifeng Xing,Shiliang Mei,Wanlu Zhang,Ruiqian Guo
As one of the promising next-generation light conversion materials, indium phosphide quantum dots (InP QDs) deserve much attention due to their great optical performances and environmentally friendly properties in particular. Herein, InP-based QDs are embedded into mesoporous SBA-15 and solid QDs/SBA-15 composites are prepared, which exhibit 1.5 times higher photoluminescence quantum yield (PLQY) and narrower full width of half maximum (FWHM) than traditional QDs powder thanks to the reduction of light reabsorption and the optical waveguide effect of mesoporous structure. These advantages contribute to the performance enhancement of light-emitting diodes (LEDs). The luminous efficacy of the LED with green QDs/SBA-15 is 99.49 lm/W, which is higher than that of QDs powder (66.14 lm/W). In addition, the white LED fabricated with green and red InP-based QDs/SBA-15 shows luminous efficacy of 61.38 lm/W. More importantly, the luminous efficacy of the white LED is improved to 129.62 lm/W when using the K 2 SiF 6 :Mn 4+ instead of red InP-based QDs/SBA-15, because the K 2 SiF 6 :Mn 4+ does not absorb the emission from green InP-based QDs/SBA-15. This value is higher than those white LEDs with InP-based QDs reported previously. It is believed that this study demonstrates the promising potential of InP-based QDs for optoelectronic applications.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Qingguo Yu,Yimin Liu,Qingru Zeng,Yuxiang Yang,Shunyan Ning,Yuezhou Wei,Xinpeng Wang,Deqian Zeng
Photocatalytic technology provides key benefits in utilizing solar energy for H 2 production and pollutant removal, making the pursuit of efficient photocatalysts a vital area of focus. Herein, a novel p-n heterojunction photocatalyst was synthesized by loading ZnSe nanoparticles onto Cu 2−x Se nanoplates, creating an internal electric field that facilitates the efficient separation of charge carriers and significantly enhances photocatalytic activity. The 14 % Cu 2−x Se/ZnSe nanocomposite exhibits excellent photocatalytic performance, achieving an H 2 production rate of 1846 μmol·g −1 ·h −1 , roughly 34 times that of pure ZnSe. Additionally, the Cr(VI) reduction rate constant of nanocomposite was 0.0277 min⁻¹ , which is 20 times and 5 times higher than those of ZnSe and Cu 2−x Se, respectively. The Cu 2−x Se/ZnSe photocatalyst demonstrated exceptional stability and reusability during multiple cycles of H 2 production and Cr(VI) reduction. An in-depth examination of experimental data and density functional theory (DFT) calculations led to proposing a potential mechanism. This work introduces a simple synthesis method for ZnSe-based photocatalysts, offering a novel approach for the effective application of solar energy in environmental and energy fields.
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