MOLECULES
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2023
·Vol. 28
·期 6
·2629
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IF 4.6
Xinru Ma,Xuxia Shai,Yu Ding,Jie Zheng,Jinsong Wang,Jiale Sun,Xiaorui Li,Weitao Chen,Tingting Wei,Weina Ren,Lei Gao,Shukang Deng,Chunhua Zeng
Thermoelectric (TE) technology, which can convert scrap heat into electricity, has attracted considerable attention. However, broader applications of TE are hindered by lacking high-performance thermoelectric materials, which can be effectively progressed by regulating the carrier concentration. In this work, a series of PbSe(NaCl)x(x = 3, 3.5, 4, 4.5) samples were synthesized through the NaCl salt-assisted approach with Na+and Cl−doped into their lattice. Both theoretical and experimental results demonstrate that manipulating the carrier concentration by adjusting the content of NaCl is conducive to upgrading the electrical transport properties of the materials. The carrier concentration elevated from 2.71 × 1019cm−3to 4.16 × 1019cm−3, and the materials demonstrated a maximum power factor of 2.9 × 10−3W m−1K−2. Combined with an ultralow lattice thermal conductivity of 0.7 W m−1K−1, a high thermoelectric figure of merit (ZT) with 1.26 at 690 K was attained in PbSe(NaCl)4.5. This study provides a guideline for chemical doping to improve the thermoelectric properties of PbSe further and promote its applications.Keywords:chemical doping;salt-assisted;NaCl doping;PbSe;thermoelectric material;thermoelectric performance
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Journal of Environmental Chemical Engineering
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2023
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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.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
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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.
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OPTICAL MATERIALS
·
2023
·
IF 3.9
Qiaocan Huang,Zunxian Yang,Yuanqing Zhou,Yuliang Ye,Bingqing Ye,Zihong Shen,Wenbo Wu,Zongyi Meng,Zhiwei Zeng,Hongyi Hong,Songwei Ye,Zhiming Cheng,Qianting Lan,Jiaxiang Wang,Ye Chen,Hui Zhang,Tailiang Guo,Fushan Li,Yongyi Chen,Zhenzhen Weng
Quantum dots (QDs) with an alloy shell (CdSe@ZnS/ZnS) are one of the most promising emitters for optoelectronic devices for their superior properties such as narrow full width at half maximum (FWHM), high color purity and tunable wavelength. However, the presence of lattice stresses during the internal growth of quantum dots can cause severe exciton bursts. Optimizing the ramp-up process during the core growth of quantum dots and rising the temperature when cladding with ZnS shells is an effective strategy for obtaining high-quality quantum dots. Besides, the stability of quantum dots is further modified by using 1-Octanethiol (OT) as ligands. Detailed analyses of the morphology, colloidal stability, and luminescence performance of QDs were represented. Finally, green CdSe@ZnS/ZnS QLEDs with prolonged carrier lifetimes and less defect state densities achieved peak luminescence at 361850 cd/m 2 with a current efficiency (CE) of 33 cd/A. This work provides a better understanding of the relationship between defect state density and the performance of quantum dots for designing and fabricating high-performance light-emitting diodes.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Yun Xing,Shan Zhao,Jiaying Wu,Xin Tang,Yu Zhang,Zhirong Zou,Ke Huang,Xiaoli Xiong
Designing non-noble metal oxygen evolution catalysts with outstanding catalytic activity is crucial for realizing cost-effective water splitting. In this paper, nitrogen-doped carbon-encapsulated polyhedral yolk-shell nanostructure bimetallic selenide (ZnSe@CoSe 2 /N-C) electrocatalyst was successfully prepared by high-temperature selenization strategy using ZIF-8 @ZIF-67 as the framework. The specially designed nitrogen-doped core-shell structure has the advantages of high specific surface area and rough porous surface, which can expose more active sites and facilitate the transfer of electrons and ions on the electrode surface. The high conductivity of ZnSe, CoSe 2 nanoparticles and the synergistic effect of bimetal increase the electrochemical activity and electron mobility of the composite. ZnSe@CoSe 2 /N-C catalyst exhibits outstanding oxygen evolution reaction performance at 1.0 M KOH, which the overpotential is down to 170 mV at 10 mA cm −2 . Furthermore, ZnSe@CoSe 2 /N-C also shows well durability and long-term stability (>113 h). This experiment might open a new path for fabrication of low-cost non-noble metal selenide electrocatalysts for oxygen evolution.
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CARBOHYDRATE POLYMERS
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2023
·
IF 11.2
Ronghua Tan,Jing Ge,Congcong Wang,Ying Wan,Xiangliang Yang
A novel type of diselenide bond-bridged hydroxyethyl starch-doxorubicin conjugate, HES-SeSe-DOX, was synthesized via a specially designed multistep synthetic route. The optimally achieved HES-SeSe-DOX was further combined with photosensitizer, chlorin E6 (Ce6), to self-assemble into HES-SeSe-DOX/Ce6 nanoparticles (NPs) for potentiating chemo-photodynamic anti-tumor therapy via diselenide-triggered cascade actions. HES-SeSe-DOX/Ce6 NPs were observed to disintegrate through the cleavage or oxidation of diselenide-bridged linkages in response to the stimuli arising from glutathione (GSH), hydrogen peroxide and Ce6-induced singlet oxygen, respectively, as evidenced by the enlarged size with irregular shapes and cascade drug release. In vitro cell studies exhibited that HES-SeSe-DOX/Ce6 NPs in combination with laser irradiation effectively consumed intracellular GSH and promoted a large rise in levels of reactive oxygen species in tumor cells, actuating the disruption of intracellular redox balance and the enhanced chemo-photodynamic cytotoxicity against tumor cells. The in vivo investigations revealed that HES-SeSe-DOX/Ce6 NPs were inclined to accumulate in tumors with persistent fluorescence emission, inhibited tumor growth with high efficacy and had good safety. These findings demonstrate the potential of HES-SeSe-DOX/Ce6 NPs for use in chemo-photodynamic tumor therapy and suggest their viability for clinical translation.
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Materials Today Physics
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2023
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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.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Meng Wang,Yanwen Zhou,Zhaohui Wang
The critical shortage of antifungal drugs and increasingly emerged resistant fungi urgently call for the development of novel fungicidal agents with translational potential. Although nanodrugs compose a new antifungal arsenal, the fungicidal efficacy barely exceeds clinical molecules. In this study, a CuFeSe 2 -PVP nano-blade, is unexpectedly discovered with ultrapotent intrinsic fungicidal efficacy. This nanostructure is facilely fabricated by a specific aqueous precipitation method with the nucleation of tetragonal eskebornite CuFeSe 2 at PVP chains. The unique semiconductor CuFeSe 2 -PVP demonstrates superior antifungal activity than the commonly used small-molecule drugs and metal nanoparticles in both planktonic fungi and biofilm. Intriguingly, electron microscopy visualizes that the nano-blades cut fungal membranes with fungi surfaces inserted by the blades. Such a membrane-piercing effect results in the loss of important intracellular components, including nucleic acids , proteins, and potassium ions. Increased intracellular reactive oxygen species (ROS) is also observed. Encouragingly, in mice with subcutaneous fungal infection, the nanodrug achieves absolute fungi clearance, effectively alleviating inflammation and promoting collagen fiber recovery. Moreover, the excellent biocompatibility of CuFeSe 2 -PVP promises great potential for further translation. This study not only provides a novel fungicidal drug candidate, but also inspires the future design of anti-fungal nanomedicine .
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Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 19
·4274-4286
·
IF 7
Jingge Zhang,Enna Ha,Danyang Li,Shuqing He,Luyang Wang,Shaolong Kuang,Junqing Hu
Nanozymes mediated catalytic therapy can produce toxic reactive oxygen species (ROS) and destroy the metabolic balance of tumor cells, providing a new direction for cancer treatment. However, the catalytic efficiency of a single nanozyme is limited by the complexity of the tumor microenvironment (hypoxia, GSH overexpression, etc.). In order to overcome these problems, we designed flower-like Co-doped FeSe2 (Co–FeSe2) nanozymes by a simple wet chemistry method. Co–FeSe2 nanozymes not only exhibit high POD and OXD-mimicking activities for facile kinetics, but also effectively consume over-expressed glutathione (GSH), inhibiting the consumption of generated ROS and destroying the metabolic balance of the tumor microenvironment. These catalytic reactions trigger cell death through apoptosis and ferroptosis dual pathways. More importantly, under the NIR II laser irradiation, the catalytic activities of Co–FeSe2 nanozymes are boosted, confirming the photothermal and catalytic synergistic tumor therapy. This study takes advantage of self-cascading engineering that offers new ideas for designing efficient redox nanozymes and promoting their clinical translation.
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MATERIALS LETTERS
·
2023
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IF 3
Caichao Wang,Yan Zhu,Kang Xu,Shuhong Sun,Mingrong Dong,Jinkun Liu,Yongmao Hu
Semiconductors Ag 8 SnS 6 (ATS) nanoparticles were synthesized by a simple one-pot method. Meanwhile, Se was added to the ATS process to form semiconductors Ag 8 SnS 6-x Se x (ATSSe) (x = 0.0, 0.2, 0.4, 0.6, 0.8) nanoparticles. The prepared ATS nanoparticles were mainly triangle in shape with grain sizes ranging from 15 ∼ 60 nm, and ATSSe nanoparticles were formed after the addition of Se during the synthesis process. Phase transformation of the synthesized nanoparticles rhombohedral crystalline ATS to cubic ATSe was observed for Se substitution ratios x in the range of 0.2 ∼ 0.8. The band gap of ATSSe nanoparticles was in the range of 1.16 ∼ 0.85 eV. This finding suggests that Se substitution is an effective method to regulate the band gap and structure of ATS.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
C.C. Wang,Y. Zhu,Y.M. Hu,M.R. Dong,J.K. Liu
In this paper, Ag 8 SnS 6 powder was synthesized by the one-pot method, then prepared into Ag 8 SnS 6 and Selenization treated Ag 8 SnS x Se 6-x thin films. The effects brought by the amounts of added Se powder during the annealing process on the product phases, structures, and morphologies are characterized, and the electrochemical property and the cell efficiency as assembled into the counter electrode (CEs) for dye-sensitized solar cells (DSSCs) were investigated. It showed Se into the Ag 8 SnS 6 lattice occupied the site of S to transform into Ag 8 SnS x Se 6-x . And the thin film also became unflatten since the particles became larger after Se doping. The cell efficiency of Ag 8 SnS x Se 6-x CEs reached 4.26%, which was increased by 28.31% compared to that of Ag 8 SnS 6 CEs. Ag 8 SnS x Se 6-x CEs performed lower charge transfer resistance (Rct) and (△EPP), and an increased△E value between the conduction band level of CEs and the redox potential of electrolyte. After 10 cycles, the almost unchanged cathode/anode current density implied the Ag 8 SnS x Se 6-x CEs received good structure stability. Selenization treatment was able to facilitate electron transport and enhance the electrocatalytic activity, and as expected to be a promising method in improving the performance of the DSSCs.
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ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Hui Wang,Weili Wang,Qianqian Xie,Di Wu,Jiayu Cao,Huilin Chen,Meng Gao,Huizhen Zheng,Xi Liu,Jie Jiang,Wenjie Li,Xiaoming Cai,Sergey V. Gudkov,Ruibin Li
Fine particulates (FPs) are a major class of airborne pollutants. In mammals, FPs may reach the alveoli through the respiratory system, cross the air–blood barrier, spread into other organs, and induce hazardous effects. Although birds have much higher respiratory risks to FPs than mammals, the biological fate of inhaled FPs in birds has rarely been explored. Herein, we attempted to disclose the key properties that dictate the lung penetration of nanoparticles (NPs) by visualizing a library of 27 fluorescent nanoparticles (FNPs) in chicken embryos. The FNP library was prepared by combinational chemistry to tune their compositions, morphologies, sizes, and surface charges. These NPs were injected into the lungs of chicken embryos for dynamic imaging of their distributions by IVIS Spectrum. FNPs with diameters <16 nm could cross the air–blood barrier in 20 min, spread into the blood, and accumulate in the yolk sac. In contrast, large FNPs (>30 nm) were mainly retained in the lungs and rarely detected in other tissues/organs. In addition to size, surface charge was the secondary determinant for NPs to cross the air–blood barrier. Compared to cationic and anionic particles, neutrally charged FNPs showed the fastest lung penetration. A predictive model was therefore developed to rank the lung penetration capability of FNPs by in silico analysis. The in silico predictions could be well validated in chicks by oropharyngeal exposure to six FNPs. Overall, our study discovered the key properties of NPs that are responsible for their lung penetration and established a predictive model that will greatly facilitate respiratory risk assessments of nanoproducts.
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