Journal of Materials Chemistry C
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2021
·Vol. 9
·期 27
·8537-8544
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IF 7.393
Zhongyuan Guan,Haihang Ye,Peiwen Lv,Lijin Wang,Jing Zhang,Bin Zou,Aiwei Tang
Multinary Cu-based chalcogenide nanocrystals (NCs) are excellent candidates for optoelectronic applications, but their growth mechanism and its impacts on the NCs’ optical properties remain controversial. Herein, we employed a simple colloidal chemistry method for the growth of multinary Cu-based NCs including ternary Cu–In–S NCs, quaternary Cu–In–Se–S NCs, and five-component Cu–In–Zn–Se–S NCs, to explore their growth mechanism and investigate their optical properties. It is found that the ternary Cu–In–S NCs contain a large number of copper vacancies, which affect the major acceptor level for the exciton recombination. With the high reaction activity of Se, the quaternary Cu–In–Se–S NCs form at low reaction temperature and have a red-shift of the photoluminescence (PL) maximum due to the recombination from the conduction band to the acceptor level. The formation process of five-component Cu–In–Zn–Se–S NCs highly depends on the Zn amount, which shows a competitive relationship between the NCs’ growth and diffusion of Zn, leading to the red- and blue-shift of PL maximum, respectively. Our study provides a clear map for the growth of multinary Cu-based NCs and shows their impacts on optical properties.
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Nature Communications
·
2025
·Vol. 16
·期 1
·10895
·
IF 15.7
Wang Wei,Wang Xinying,Yang Huanhuan,Yu Zhipeng,Zhang Weicai,Huang Haoliang,Zhao Zaowen,Zheng Xuerong,Liu Lifeng,Deng Yida,Li Yunyong
A rational design principle for selecting optimal anion dopants in transition-metal compounds to enhance sulfur redox activity is lacking in Li-S batteries. Herein, we propose an accurate p-p-s orbital electronic coupling descriptor (involving the p -orbitals of anion dopants and anions in transition-metal compounds and the s -orbitals of Li in lithium polysulfides) as a criterion for choosing anion dopants to guide the development of efficient anion-doped Li-S catalysts through machine-learning, theoretical, and experimental validation. We reveal the relationship between the electronic properties of various anion-doped WSe 2 and the thermodynamics and kinetics of sulfur redox. Our findings show that moderate p-p-s orbital electronic coupling optimizes polysulfide adsorption, facilitating Li 2 S nucleation and decomposition, thereby minimizing Gibbs free energy and maximizing catalytic efficiency for sulfur redox. A volcano relationship between the p-p-s coupling strength and catalytic activity is established. The optimal B-WSe 2 /MXene catalyst achieves a ~ 3 Ah pouch cell with 430 Wh kg −1 specific energy and good cycle life (81.3% capacity retention over 71 cycles). These findings provide a guideline for designing efficient anion-doped Li-S catalysts with moderate p-p-s coupling to enable rapid sulfur catalytic conversion in Li-S batteries.
研究领域:
材料科学
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电化学
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储能技术
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催化
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计算材料设计
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CHEMICAL PHYSICS LETTERS
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2025
·
IF 3.1
Ye Zhang,Xiaobing Yang
Recently, the overuse of tetracycline (TC) has caused persistent adverse effects on both ecological environment and human health. It needs to develop effective methods for removing TC from water. Herein, Ag 2 S/ZnIn 2 S 4 @TiO 2 @carbon was successfully synthesized and used as catalyst for degradation of TC. The influence of Ag 2 S and ZnIn 2 S 4 on the photocatalytic activity of TiO 2 @carbon were investigated. The results show that the Ag 2 S/ZnIn 2 S 4 @TiO 2 @carbon achieved a photocatalytic degradation efficiency of 98.73 %. Moreover, the photocatalytic activity of Ag 2 S/ZnIn 2 S 4 @TiO 2 @carbon remained nearly unchanged after four consecutive cycles, with only a 3.2 % decrease in degradation efficiency. Finally, the degradation mechanism of TC over Ag 2 S/ZnIn 2 S 4 @TiO 2 @carbon was elucidated.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Shijun Zhang,Qinjun Shao,Yan Su,Lei Xu,Qike Jiang,Jian Chen
Lithium-sulfur (Li-S) battery possess the advantage of high specific energy but suffer from unstable cyclic performance due to the sluggish liquid-solid conversion kinetics causing severe lithium polysulfides (LiPS) shuttling. Designing multifunctional electrocatalysts with improved activity and abundant active sites to regulate the dynamics for sulfur electrochemistry is still a significant challenge. Herein, we proposed a thiourea assisted pyrolysis combined with hard template method to synthesize cobalt single atoms co-coordinated by N and S atoms embedded hollow carbon spheres (Co-NS-HCS) as a novel sulfur host. The Co-NS-HCS mainly consists of well-dispersed Co-N 3 S-C center sites where Co is co-bonded by N and S atoms. Systematical characterizations revealed that the Co-NS-HCS exhibit improved SRR electrocatalytic properties with higher exchange current density and larger electron transfer number than that of Co-N-HCS. When equipped in sulfur cathodes, the S@Co-NS-HCS exhibits superior rate performance (925 mAh g −1 at 2 C), long cycle stability (69.1% of capacity retention after 500 cycles at 1 C). Moreover, the assembled Li-S pouch type cell also exhibits competitive cyclic performance that work stably for 100 cycles at 0.1 C with a high capacity retention of 84.7%. This work furnishes a feasible scheme for the rational design of single atoms catalysts with improved electrocatalytic activity for sulfur cathodes based on the coordination environment regulation strategy.
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Materials
·
2020
·Vol. 13
·期 6
·1279
·
IF 3.057
Yanqin Xu,Liyue Xiao,Yating Chang,Yuan Cao,Changguo Chen,Dan Wang
In order to achieve a controlled release drug delivery system (DDS) for cancer therapy, a pH and redox dual-responsive mesoporous silica nanoparticles (MSN)-sulfur (S)-S- chitosan (CS) DDS was prepared via an amide reaction of dithiodipropionic acid with amino groups on the surface of MSN and amino groups on the surface of CS. Using salicylic acid (SA) as a model drug, SA@MSN-S-S-CS was prepared by an impregnation method. Subsequently, the stability, swelling properties and drug release properties of the DDS were studied by x-ray diffraction, scanning electron microscopy, Fourier transform infrared microspectroscopy, size and zeta potential as well as Brunauer–Emmett–Teller surface area. Pore size and volume of the composites decreased after drug loading but maintained a stable structure. The calculated drug loading rate and encapsulation efficiency were 8.17% and 55.64%, respectively. The in vitro drug release rate was 21.54% in response to glutathione, and the release rate showed a marked increase as the pH decreased. Overall, double response functions of MSN-S-S-CS had unique advantages in controlled drug delivery, and may be a new clinical application of DDS in cancer therapy.Keywords:mesoporous silica nanoparticles;double response;drug delivery;drug release
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DESIGNED MONOMERS AND POLYMERS
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2017
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IF 1.139
Kun Zhang,Kai Yang,Shiyun Ai,Jing Xu
A blue-fluorescence 2,4,6-tris(4-fluorophenyl)-1,3,5-triazine (TFPT) monomer was synthesized with high yield and high purity under mild reaction conditions. The TFPT, which had three active fluoric groups, was facilely incorporated into stable cross-linked fluorescent polymeric nanoparticles (FCPNs) via precipitation polymerization with 6-(4-hydroxyphenyl)pyridazin-3(2H)-one (HPZ). The FCPNs were highly dispersible in water and showed uniform size, intense blue fluorescence, and excellent biocompatibility, making them promising for live cell imaging label applications. This work has the potential to promote the exploitation of novel s-triazine monomers, and to provide a new view of functional crossing-linked polymers based on such monomers.
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CONSTRUCTION AND BUILDING MATERIALS
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2014
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IF 2.265
Xiaolu Guo,Wenpei Hu,Huisheng Shi
Nano-modified composite geopolymers were successfully prepared from municipal solid waste incineration fly ash (MSWIFA) and class C fly ash (CFA). The results indicate that both nano-SiO 2 and nano-γ-Al 2 O 3 have a good modification effect on geopolymer, of which nano-SiO 2 has a better performance than nano-γ-Al 2 O 3 . The optimum content of nano-SiO 2 and nano-γ-Al 2 O 3 are 1.5% and 2.0%, respectively. XRD shows that there is no new phase emerging after adding a small amount of nanomaterials. By FT-IR and SEM, it means that nanomaterials facilitate the reaction of geopolymer, making the modified geopolymer more compact. BET shows nano-SiO 2 especially modifies the pore distribution and pore structure of geopolymers. Additionally, nanomaterials have an improvement to the solidification/stabilization (S/S) of heavy metals.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Bo Shao,Tianyun Liu,Deng-Bing Li,Linxing Meng,Jianyuan Wang,Wei Zhai,Liang Li
Solar-driven hydrogen production is significant for achieving carbon neutrality but is limited by unsatisfactory surface catalytic reaction kinetics. Layer regulation can impact carrier transmission or catalytic behavior, but the specific effects on the oxygen or hydrogen evolution reaction (OER or HER) remain unclear, and atomic layer level modulation for maxing HER is challenging. Here the distinct roles of modulated Zn–S or In–S surface layers in ZnIn 2 S 4 (ZIS) for the OER and HER, respectively, are disentangled. Moreover, the extensive characterizations and computational results demonstrate that stressful environments enable individual modulation and introduce Ni into the surface In–S layer rather than the easily alterable Zn–S layer, creating deeper hybridized electronic states of Ni 3 d –S 3 p , optimizing H * adsorption/desorption, and maximizing surface catalytic benefits for the HER. Consequently, the optimized ZIS exhibited a photocatalytic hydrogen production rate of up to 18.19 mmol g −1 h −1 , ≈32 times higher than pristine ZIS. This investigation expands the application scenarios of ultrasonic technology and inspires other precise control types, such as defects and crystal plane engineering, etc.
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CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Shilpi Sengupta,Samim Reza,Roshini Arulraj,Ranjit Thapa,Manab Kundu
Supercapacitors have emerged as promising energy storage devices due to their high-power density and long cycle life, making them attractive alternatives to conventional energy storage systems. Among various electrode materials, transition metal sulfides, particularly cobalt nickel sulfides, have gained significant attention due to their superior electrical conductivity and rich redox chemistry. In this study, we synthesized cobalt nickel sulfides (CoNi₂S₄/Ni₃S₂) on nickel foam via a facile two-step hydrothermal method to investigate their electrochemical performance in two different morphologies: nanosheets and nanoarrays. Electrochemical characterization demonstrated that CoNi₂S₄/Ni₃S₂ nanoarrays exhibited enhanced performance compared to their nanosheet counterparts, with an areal specific capacitance of 8203.63 mF cm −2 at 30 mA cm −2 over 6000 cycles. The superior performance of the nanoarrays was attributed to their unique vertical alignment, providing more electroactive sites and reducing ion diffusion resistance. To further elucidate the electronic properties of CoNi₂S₄/Ni₃S₂, density functional theory (DFT) calculations were performed. The results indicated that the heterostructure exhibited an increased density of states near the Fermi level compared to pristine CoNi₂S₄, leading to improved charge storage capability. Quantum capacitance analysis revealed that the CoNi₂S₄/Ni₃S₂ heterostructure possessed higher capacitance values over a range of electrode potentials, corroborating the enhanced electrochemical properties observed experimentally. Furthermore, work function analysis suggested improved electronic conductivity in the hybrid structure, further supporting its superior charge transfer characteristics. The hybrid solid-state device fabricated by coupling of CoNi₂S₄/Ni₃S₂ electrodes with activated carbon, delivered an energy density of 0.204 mWh cm −2 at a power density of 8 mW cm −2 . Impressively, even at a high-power density of 40.0 mW cm −2 , it retained an areal energy density of 0.039 mWh cm −2 .
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APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Chang Cheng,Xunchang Wang,Feng Wang
Two analogous positional polymers P16PySO and P27PySO have been synthesized via the copolymerization from dibenzothiophene-S,S-dioxide and pyrene building blocks. The effect of the linking pattern on the molecular packing, photophysical and photocatalytic properties of the two isomers was investigated. It was interestingly found that a minor change at the substitution position of pyrene unit was demonstrated to largely influence the photocatalytic properties of the two isomers. P16PySO exhibited an encouraging average hydrogen evolution rate (HER) of 619.5 μmol h −1 and the maximum HER of 774 μmol h −1 , much higher than that of 2,7-counterpart with a moderate rate of 282 μmol h −1 . The increased photocatalytic activity of P16PySO is mainly ascribed to its more ordered molecular packing, broader absorption region, better wettability , and higher photo-generated charge mobilities. Moreover, the optimum HER was increased from 774 to 1013 μmol h −1 when the amount of the photocatalyst P16PySO was increased from 50 to 100 mg, which is among the top solar-to‑hydrogen conversion efficiencies reported so far for the polymeric photocatalysts.
研究领域:
材料科学
·
化学
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 3.1
Shuailing Wang,Qi Li,Yuxi Zheng,Feng Wang
Donor–acceptor (D–A) conjugated polymers have emerged as promising photocatalysts for hydrogen peroxide (H 2 O 2 ) production due to their unique optoelectronic properties. While extensive studies have explored the impact of D/A structures on photocatalytic H 2 O 2 production performance of conjugated polymers, the role of the linkage structure in modulating photocatalytic activity was rarely investigated. In this study, three D–A conjugated polymers, including ethylene-linked PSO-CC, imine-linked PSO-CN, and azo-linked PSO-NN, have been designed and synthesized by Suzuki coupling reaction. Remarkably, although the linkages differ by a single atom, the three polymers exhibit significantly different optoelectronic characteristics and charge transfer kinetics. It was revealed that photogenerated electrons preferentially migrated to the N sites in imine and azo linkages in PSO-CN and PSO-NN, respectively, thereby increasing photocatalytic H 2 O 2 production activity. The moderate polarized polymer PSO-CN shows excellent photocatalytic performance with an H 2 O 2 production rate of 1.43 mmol g −1 h −1 in pure water without any sacrificial agent. Theoretical investigation demonstrates that the imine linkages in PSO-CN serve as the active sites for photocatalysis. This work highlights the critical role of linkage electronic properties in modulating photocatalytic H 2 O 2 production performance for D–A conjugated polymers.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Fei Chen,Yiluo Zhang,Qing Hu,Shiyu Cao,Shangbin Song,Xinqi Lu,Qiang Shen
Traditional liquid lithium-sulfur batteries have two key problems: poor safety and shuttle effect . These two challenges can be overcome by using solid-state electrolytes. But poor ionic and electronic conductivity due to solid/solid contact between the electrode and the electrolyte for all-solid-state lithium-sulfur batteries (ASSLSBs). Here, we have synthesized Li 6.4 Ga 0.2 La 3 Zr 2 O 12 (LLZO) conductive ceramics with high ionic conductivity . LLZO is used as the lithium-ion conductor and multi-walled carbon nanotubes (MWCNt) are used as the electronic conductor to form S/MWCNt/LLZO by the thermal diffusion method, resulting in an e − /S/Li + conductive network. The prepared S/MWCNt/LLZO composite material, composite solid electrolyte, and lithium metal are assembled into ASSLSBs. After 50 cycles, the high capacity of 825 mAh·g −1 is maintained with 72.62% capacity retention at 0.2C and 45 °C. The higher capacity indicates the success of forming a conductive network that can improve the electrochemical performance of ASSLSBs. At 0.2C, the capacity of the S/MWCNt/LLZO composite cathode remains at 873 mAh·g −1 after 60 cycles when the operating temperature is increased to 60 °C, indicating good cycle performance.
研究领域:
材料科学
·
能源存储技术
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