POLYMER DEGRADATION AND STABILITY
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2013
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IF 2.77
Yongzhen Wang,Jianqing Zhao,Yanchao Yuan,Shumei Liu,Zhengming Feng,Ying Zhao
In this study, a maleimido-substituted aromatic s-triazine (TMT) was synthesized successfully via the nucleophilic substitution reaction between cyanuric chloride and N-(4-hydroxyphenyl) maleimide (HPM) formed from paraaminophenol and maleic anhydride ; and its structure was characterized by flourier transform infrared spectroscope (FT-IR), 1 H and 13 C nuclear magnetic resonance (NMR), and elemental analysis (EA). The studied flame-retarded epoxy resins were obtained via thermal curing reactions among 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) modified epoxy prepolymer (DOPOER), 4,4′-diaminodiphenyl ethane (DDM) and TMT. Cure kinetics, flame-retardant, thermal and mechanical properties of the cured epoxy resins were characterized by differential scanning calorimeter (DSC), thermogravimeric analysis (TGA), limited oxygen index (LOI) measurement, UL 94 vertical burning test and mechanical test. The results indicate that TMT can promote the curing reaction of epoxy resins and decrease its apparent activation energy ( E a ). Introduction of TMT can greatly improve flame-retardant, thermal and mechanical properties of the cured epoxy resins. Compared with the DOPOER/DDM system without TMT, LOI value of the cured epoxy resin can increase from 36.4% to 51.8%, and all samples can pass UL 94 V-0 rate when TMT content ranges from 1.98 wt% to 7.44 wt%. Its initial degradation temperature and glass transition temperature ( T g ) can increase maximally by 37.6 °C and 12.6 °C, respectively when TMT content is 3.88 wt%.
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SOLID STATE SCIENCES
·
2016
·
IF 2.041
Long Shi,Dajiang Mei,Jingli Xu,Yuandong Wu
Three new bismuth-based compounds, Bi 2 O(XO 4 )(IO 3 ) 2 (X = S, Se, Cr) have been synthesized by hydrothermal method and characterized by single-crystal X-ray diffraction. Title compounds crystallize in the monoclinic space group P 2 1 /n (No.14) with lattice parameters: a = 7.2391(5), b = 17.9074(12), c = 7.7964(5) Å, β = 109.6521(15) °, Z = 4 for Bi 2 O(SO 4 )(IO 3 ) 2 ; a = 7.2665(4), b = 18.0115(10), c = 7.9310(5) Å, β = 109.7480(10) °, Z = 4 for Bi 2 O(SeO 4 )(IO 3 ) 2 ; and a = 7.2708(6), b = 17.9967(14), c = 7.8998(6) Å, β = 109.799(2) °, Z = 4 for Bi 2 O(CrO 4 )(IO 3 ) 2 , respectively. All compounds exhibit three-dimensional frameworks that are composed of [Bi 4 O 2 ] 8+ clusters, [IO 3 ] − and [XO 4 ] 2− (X = S, Se, Cr) groups. Bi atoms occur in two different coordination types, showing the stereochemical influence of the Bi 3+ lone electron pair. Title compounds were characterized by infrared spectra, solid state UV–vis–NIR diffuse reflectance spectroscopy and thermogravimetric analysis.
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CHEMICAL ENGINEERING JOURNAL
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2020
·
IF 10.652
Yang Bai,Yanbiao Zhao,Weidong Li,Linghui Meng,Yongping Bai,Guorong Chen
The developing sulfide solid electrolyte is a promising way to overcome shuttle effect of polysulfide in the traditional liquid Li-S battery. However, an air stable sulfide solid electrolyte and competitive solid–solid interface structure must be constructed firstly. Herein, we have designed an organic–inorganic multi-scale composite electrolytes to overcome the interfacial issues of solid state Li-S batteries (SSLSBs). The organic–inorganic composite electrolyte consists of a gel polymer electrolyte (GPE) and an oxygen doped inorganic sulfide solid electrolyte. The O doped sulfide solid electrolyte improves its chemical stability and suppresses the lithium dendrites. A thin GPE film protects the crystal structural stability during cycles and greatly enhances the performance of O doped sulfide solid electrolyte due to the GPE not only constructs soft interface contact between S cathode and solid electrolyte, but also builds lithium ion transport paths by ionic liquid between them. Those SSLSBs display a very good cycling performance with the specific capacity of 1023 mAh/g after 50 cycles at 60 °C and 541 mAh/g after 150 cycles at 30 °C under same rate of 0.1 C. This study demonstrates that the development of advanced solid-state Li-S battery needs to fully integrate a number of technical advantages.
研究领域:
电化学
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材料科学
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固态电池
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能源存储
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界面化学
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纳米材料
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电极材料
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2020
·
IF 6.984
Xue Yu,Shuying Cheng,Qiong Yan,Junjie Fu,Hongjie Jia,Quanzhen Sun,Zhiyuan Yang,Sixin Wu
Cation substitution has an important impact on the power conversion efficiency (PCE) of Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells. Herein, a significant PCE enhancement of flexible indium-doped CZTSSe solar cells has been achieved by partially substituting Sn 4+ with In 3+ . Systematic measurements indicate that In doping in CZTSSe film effectively improves the crystallinity and carrier concentration of the absorber layer . Meanwhile, the treatment reduces interface recombination and band tailing by passivating deep defects and increases the open-circuit voltage ( V oc ) of the solar cells. By physical analysis, the key parameters for the solar cell diode such as A , J 0 , R s and R sh are significantly improved after In-doping, indicating better PN junction quality. Under the optimal In-doping (x = In/(Sn + In) = 9%), the flexible Cu 2 ZnSn 1- x In x (S,Se) 4 solar cell has been successfully obtained with the best efficiency of 7.19% and the V oc enhancement of 62 mV due to reduced V oc deficit and band tailing.
研究领域:
材料科学
·
半导体物理
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光伏技术
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无机功能材料
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能源材料
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INORGANIC CHEMISTRY
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2026
·
IF 4.7
Yuqi Xie,Enze Zhu,Yimeng He,Yifan Wang,Qinghua Li,Bingxin Lei
Lead-free double perovskite Cs2AgBiBr6 (CABB) has emerged as a promising photocatalytic material, but its efficiency is limited by rapid electron–hole recombination and insufficient active sites. Herein, an S-scheme heterojunction photocatalyst was constructed through the in situ growth of CABB nanosheets on a zinc phthalocyanine (ZnPc) substrate, where ZnPc acted as the reduction site with abundant high-energy electrons. Comprehensive characterizations confirmed the formation of robust interfacial Zn–Br bonds, ensuring intimate contact between ZnPc and CABB. Under visible-light irradiation, the optimized 0.05ZnPc/CABB composite exhibited significantly enhanced photocatalytic activity, achieving complete degradation of Rhodamine B (RhB) within 20 min, which outperformed pristine CABB and ZnPc. Mechanistic investigations involving photoelectrochemical measurements and density functional theory calculations revealed that the S-scheme band alignment, driven by the interfacial Zn–Br bonds and the built-in electric field, significantly enhanced charge separation and transfer. Additionally, the composite displayed excellent stability, maintaining 99% RhB degradation efficiency after five cycles. This work provides a novel strategy to enhance CABB photocatalysis via constructing S-scheme heterojunctions with ZnPc, highlighting potential applications in environmental remediation.
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DOI
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
·
IF 9.2
Yuhong Tang,Ziwei Wang,Fang Liao,Kunpeng Song
Direct seawater electrolysis offers a sustainable route for hydrogen production, but chloride ions cause side reactions and corrosion. Here, we report a heterogeneous (Ni,Bi)-doped MoS 2 electrocatalyst with staggered nanosheets grown on carbon cloth via one-step hydrothermal synthesis. The (NiBi 0.2 )S@MoS 2 catalyst achieves low overpotentials of 112 mV (pure water) and 114 mV (simulated seawater) at 10 mA cm −2 , with Tafel slopes of 61 and 69 mV dec −1 , respectively. It requires only 1.76 V to reach 100 mA cm −2 in two-electrode overall water splitting and operates stably for over 24 h in alkaline seawater. Bi doping promotes electron transfer from Ni and Mo to S sites, optimizing active center configuration, while heterogeneous interfaces enhance H 2 O dissociation and hydrogen chemisorption. This work provides insights for designing efficient, low-cost, and corrosion-resistant electrocatalysts for direct seawater splitting.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2026
·
IF 4.8
Jiawei Wu,Silin Yang,Yongping Li,Liwei Liu,Junle Qu,Jun Song,Jiaqing Guo
NSCDs show a 180-fold intensity change and an 80 nm polarity-induced red shift. • NSCDs target LDs and enable sustained imaging of individual LDs. • Live-cell imaging captured individual LD metabolic responses and fusion-like remodeling. Lipid droplets (LDs) undergo remodeling of their polarity microenvironment during abnormalities in lipid metabolism, accompanied by changes in LD abundance and size. However, the narrow ranges of polarity response, insufficient targeting specificity, and limited stability of existing probes hinder the dynamic and accurate monitoring of individual LDs. Here, we developed nitrogen and sulfur codoped carbon dots (NSCDs) for monitoring polarity-related microenvironmental responses of individual LDs under metabolic perturbations. NSCDs exhibited a solvent-dependent decrease in fluorescence intensity and an approximately 80 nm red shift in emission. NSCDs were rapidly internalized and preferentially localized in LDs. Nutrient deprivation and inhibition of triacylglycerol synthesis decreased area-normalized NSCDs fluorescence, whereas OA-induced lipid accumulation increased it, reflecting distinct polarity-related microenvironmental responses. Furthermore, time-lapse imaging captured local events resembling LD fusion during SR59230A treatment, accompanied by enhanced local fluorescence during these remodeling events. These results support the use of NSCDs for dynamically monitoring polarity-related microenvironmental responses of individual LDs under metabolic perturbations Download: Download high-res image (127KB) Download: Download full-size image
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LANGMUIR
·
2026
·
IF 4.4
Tie Ye,Yong Qin,Zhenyu Gao,Zhengkun Long
Advancing green hydrogen evolution critically depends on the design of bifunctional electrocatalysts that are both highly economical and efficient for overall water decomposition. Herein, we report the sulfur-doped porous CoMoP2 catalyst synthesized on nickel foam (S-CoMoP/NF) via a simple step-by-step hydrothermal approach. Through extensive physicochemical characterization, it is verified that S atoms are effectively immobilized into the CoMoP2 lattice, thereby tuning the electronic structure while retaining a porous framework. As evidenced by electrochemical testing conducted in 1.0 M KOH, S-CoMoP/NF possesses exceptional bifunctional capability, attaining overpotentials as low as 191 mV for the hydrogen evolution reaction and 331 mV for the oxygen evolution reaction at a current density of 100 mA cm–2. According to density functional theory (DFT) calculations, the introduction of S dopants triggers charge redistribution, elevates the d-band center, and fine-tunes the adsorption, consequently accelerating the catalytic kinetics. The S-CoMoP/NF||S-CoMoP/NF electrolyzer achieves 100 mA cm–2 at 1.82 V and demonstrates a stabilized performance throughout 80 h. Beyond presenting a high-performance non-noble bifunctional electrocatalyst, this work further elucidates how anionic doping modulates charge distribution to enable efficient water splitting.
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产品关联
DOI
PubMed
高影响因子
CATALYSIS LETTERS
·
2026
·Vol. 156
·期 6
·156
·
IF 2.5
Tao Kun,Zhao Chao,Yu Wenya,Hu Shengye,Xue Hui,Zhang Mengmeng M.
Converting CO 2 into valuable chemicals is a sustainable way to address the energy and environmental crisis, yet achieving high selectivity toward CO remains challenging. Here, a S-doped copper-bismuth oxide (S-CuBiO x ) catalyst with a hierarchical structure was synthesized via a facile solution method toward selectively producing CO from CO 2 . The prepared S-CuBiO x exhibits a 91.3% CO Faradic efficiency at −0.9 V RHE in an H-type cell with 0.5 M KHCO 3 solution, delivering a 3.8-fold enhancement compared to the undoped CuBiO x , while decreasing the H 2 and HCOOH by-products to 2.6% and 4.5%, respectively. The doped-S can be responsible for the excellent CO selectivity, namely, the S dopant induces S-M-O (M = Cu or Bi) bond formation and tunes the local electronic structure of S-CuBiO x , thus benefiting *COOH formation/stabilization and accelerating the reaction kinetics toward CO. This work provides a rational design strategy for steering CO 2 RR selectivity toward CO via non-metal heteroatom doping in bimetallic oxide systems. Graphical The alternative text for this image may have been generated using AI.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
·
IF 19.7
Huashuai Hu,Zhihang Xu,Xiyang Wang,Chi Zhang,Molly Meng-Jung Li,Ye Zhu,Jiacheng Wang,Dingsheng Wang,Ling Liu,Kuo Liu,Minghui Yang
Asymmetric Zr single-atom sites with axial S atom are constructed. • Efficient oxygen reduction reaches 0.913 V with 110 h stability. • Electronic structure is tuned to optimize intermediate adsorption. • Breaking the scaling relationship enables improved ORR kinetics. Asymmetry engineering in single-atom catalysts (SACs) has emerged as a powerful approach to modulate electrocatalytic performance. However, Zr-based SACs have been rarely investigated for the oxygen reduction reaction (ORR) due to limited synthetic precedents and unclear coordination-activity relationships. Here, we report a novel A -S-Zr-N 2 O 2 @NC catalyst in which axial sulfur incorporation creates an asymmetric Zr-N/O/S coordination environment, inducing electronic redistribution and generating highly active catalytic sites. The catalyst exhibits a half-wave potential (E 1/2 ) of 0.913 V, surpassing commercial Pt/C and most state-of-the-art non-noble-metal nanomaterials, while maintaining excellent Zn-air battery (ZAB) durability over 28 days and high methanol tolerance. Mechanistic studies confirm that S atom enhances *OOH adsorption on Zr sites, breaks the scaling relationship, and lowers the O-O bond cleavage barrier, enabling an efficient four-electron reaction pathway. Our findings highlight the immense potential of the Zr-based SACs platform for electrocatalysis, elucidate the mechanistic role of asymmetric ligand engineering, and provide a rational design framework for high-performance catalytic materials. Download: Download high-res image (166KB) Download: Download full-size image
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Materials Today Chemistry
·
2026
·
IF 7.4
Mengjiao Zhao,Xianjie Xu,Sheng Huang,Xiuquan Gu,Wufan Xuan
The CsCu 2 I 3 /ZnO-heterojunction-based sensor enables H 2 S detection with a response value of 0.83 at 1 ppm, with response and recovery times of 240 s and 834 s. • The CsCu 2 I 3 /ZnO heterojunction improves structural stability and ensures continuous and stable sensor response. • The CsCu 2 I 3 /ZnO-heterojunction-based sensor achieves self‐calibration for different H 2 S concentrations with 99% detection accuracy. Hydrogen sulfide (H 2 S), a colorless and toxic gas, poses serious health risks upon prolonged exposure, including damage to respiratory and cardiovascular systems, which can be fatal in severe cases. Current H 2 S sensors suffer from limited response, particularly in detecting ultra‐low concentrations. To overcome this limitation, we developed a CsCu 2 I 3 /ZnO heterojunction‐based gas sensor via vacuum evaporation. This composite material enables highly responsive H 2 S detection at room temperature. The heterojunction not only improves structural stability but also ensures continuous and stable sensor response. At 1 ppm H 2 S, the sensor exhibits a sensitivity of 0.72, the response value of 0.83, the limit of detection (LOD) of 14.25 ppb, with response and recovery times of 240 s and 834 s, respectively. Furthermore, an intelligent calibration framework was developed by integrating Gramian Angular Summation Fields with the AlexNet algorithm, operating as a robustness enhancer. The sensor achieves self‐calibration for different H 2 S concentrations with 99.33% detection accuracy through 5-Fold Cross-Validation, significantly enhancing quantification capability. These results demonstrate the excellent potential of our CsCu 2 I 3 /ZnO-heterojunction-based sensor in H 2 S monitoring. The combination of responsive materials with machine learning offers a robust strategy for advancing ultra‐low concentration gas detection technologies.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Shengquan Shan,Jihao Ma,Yang Chen,Lun Zhang,Chengyang Wang,Yanrui Yang,Ru Zhou,Mei Lyu,Jun Zhu
An anion-cation synergistic strategy is adopted by TbCl 3 post-treatment in Sb 2 (S,Se) 3 solar cells. • This strategy induces the further growth of Sb 2 (S,Se) 3 with favorable crystal orientation. • TbCl 3 -treatment suppresses deep-level defects and adjusts band alignment of Sb 2 (S,Se) 3 films. • The champion device achieves a PCE of 10.11% with excellent stability. Antimony selenosulfide (Sb 2 (S,Se) 3 ) is a promising quasi-one-dimensional photovoltaic material in the application of solar cell field because of its outstanding optoelectronic properties. It is extremely difficult to achieve the Shockley-Queisser limit due to the presence of various defects and the less favorable (hk0) crystal orientation in Sb 2 (S,Se) 3 films. Here, we report an anion-cation synergistic strategy to enhance the quality of Sb 2 (S,Se) 3 films by terbium chloride post-treated process. Both Tb 3+ and Cl − ions are incorporated into the crystal lattice of Sb 2 (S,Se) 3 after post-treatment, which is confirmed by X-ray photoelectron spectroscopy and X-ray diffraction. This anion-cation synergistic effect promotes the Sb 2 (S,Se) 3 films to have a preferred (hk1) crystal orientation, larger grain size, suppressed deep-level defects and more favorable energy band alignment to facilitate charge carrier transport. Consequently, terbium chloride post-treatment enhances the performance of Sb 2 (S,Se) 3 solar cells, achieving a remarkable of 10.11%. Furthermore, the champion devices exhibit an excellent storage, humidity and thermal stability over 800 h aging test. This work provides a valuable strategy for fabricating high-quality of Sb 2 (S,Se) 3 films and high-efficiency inorganic horizontal and vertical PN heterostructure solar cells.
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