CHINESE SCIENCE BULLETIN
·
2013
·Vol. 58
·期 11
·1262-1266
·
IF 1.319
Wang Jing,Liu ZhengPing
Poly(aryl ether ketone)s (PAEKs) were successfully synthesized via nucleophilic aromatic substitution (S N AR) mechanism, using ionic liquids as green reaction media. The influence of various reaction parameters including monomer concentration, dehydration time, polymerization temperature and duration, IL’s cations and anions nature, upon PAEKs molecular weight was investigated. In addition, the peculiarities of hydrogen-bonding ability of ILs were investigated. The interaction of 2,2-bis(4-hydroxyphenyl) propane (bisphenol A) with ILs has a strong influence on PAEKs synthesis. Various moderate molecular weight PAEKs have been obtained in high yields with molecular weights ranging from 10000 to 18000 g mol −1 .
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 31
·10660-10672
·
IF 6.4
Yonggang Zhao,Congyan Xu,Zhineng Zhou,Yufei Chen,Ying Zhang,Lang Wu,Xu Su,Xinghuan Hu,Shurong Wang
High-temperature sulfoselenization is essential in producing Cu2ZnSn (S,Se)4 (CZTSSe) thin-film solar cells. At high temperature, the Cu2ZnSn(S,Se)4 phase-transition speed is fast, which causes grain transition to mature quickly, followed by grain decomposition. Although grain surfaces are relatively flat at low temperatures, the small grain and more grain boundaries lead to low efficiency. In this study, a dynamic-temperature sulfoselenization process was adopted to utilize both the advantages of high and low temperatures comprehensively. Different constant- and variable-temperature sulfoselenization processes were developed for annealing Cu–Zn–Sn–S precursor films prepared in the air using dimethyl sulfoxide (DMSO) and 2-methoxyethanol (MOE) dual solvent systems. As a result, CZTSSe films with a flat, holeless, and dense surface, and a single-layer large grain penetrating the whole cross-section were fabricated by a proper variable-temperature sulfoselenization process. Finally, 11.11% total-area power conversion efficiency (12.22% active area efficiency) of CZTSSe solar cells (without antireflection coating) based on the variable-temperature sulfoselenization process was achieved successfully. Compared with the highest efficiency of 9.10% of CZTSSe film solar cells fabricated from the stable-temperature sulfoselenization annealing process, the efficiency was improved by 22%. The variable-temperature annealing processes in this study can also be applied to the preparation of other multi-element thin-film semiconductor materials.
✓ 已验证
DOI
高影响因子
POLYMER
·
2020
·
IF 4.231
Bin Shen,Hongting Pu
A new monomer , propargyl-1-methylimidazolium bromide, is synthesized. A series of poly(ether sulfone)s with pendent imidazolium (PES-Im-x) are synthesized from poly(ether sulfone)s with azide via nucleophilic polycondensation , bromination, and azidation, which are then reacted with propargyl-1-methylimidazolium bromide via click chemistry. The membranes are prepared sequentially via solution casting and ion exchange, which exhibit good alkaline stability under basic and elevated temperature conditions. The micro-phase separation of the membranes is observed on transmission electron microscopy . The conductivities of the membranes achieve in the range of 3.53 × 10 −2 to 5.76 × 10 −2 S cm −1 at 80 °C, which are related to the introduction of dense imidazolium groups on the side chains of the polymers. The designed structure facilitates the aggregation and transport of the ions in the membranes. The membrane electrode assembly based on PES-Im-38 with a power density of 18.0 mW cm −2 at 60 °C is obtained. In addition, all these membranes show good dimensional stability and thermal stability. It is demonstrated that click reaction may provide a viable strategy for the further preparation of high performance anion exchange membranes .
✓ 已验证
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2024
·Vol. 149
·期 23
·13759-13771
·
IF 3
Li Wenjie,Long Jiangfeng,Liu Sijia,Wang Peng,Xu Linglin,Lai Yong
To assess the feasibility of using C-S–H seeds to boost the anti-mechanical vibration capabilities of concrete, this work evaluated the mechanical properties, hydration kinetics, phase assemblage of hydrates, and pore structure of Portland cement (PC) and slag cement mortars, at varying dosages of C-S–H seeds. Results reveal that the incorporation of C-S–H seeds negatively affects the vibration resistance of neat PC, while it effectively enhances the vibration resistance of slag cement. The addition of these seeds facilitates cement hydration and improves the early mechanical properties, which is evident in the shortened appearance time of the hydration exothermic peak by almost 50%. The remarkable vibration resistance observed in slag cement primarily stems from the synergistic effect between C-S–H seeds and slag. However, the premature formation of the internal microstructure in neat PC due to C-S–H seeds disrupts the stability of mutual construction between hydration products. The findings indicate that C-S–H seeds can be used in engineering to enhance concrete lifespan, reduce road repair expenses, and enhance construction efficiency.
✓ 已验证
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2020
·
IF 4.089
Jindong Chen,Chensheng Lin,Shunda Yang,Xiaotian Jiang,Shuangshuang Shi,Yingshuang Sun,Bingxuan Li,Shenghao Fang,Ning Ye
Two ternary infrared nonlinear optical materials Cd4SiS6 (1) and Cd4SiSe6 (2) with polar space group Cc were obtained by mixing d10 configurations-central tetrahedra motifs and nonlinear optical (NLO)-active distorted MIVQ4 tetrahedra motifs in a non-alkaline earth metals-containing system. They exhibited an interesting three-dimensional (3D) framework structure, and millimeter-level single crystals were successfully grown by a chemical transport reaction. Comprehensive optical measurements indicated that they achieve coexistence of good second-harmonic generation (SHG) responses (1.3 and 1.9 × AgGaS2 at 74–106 μm particle size) and high laser-induced damage thresholds (8.6 and 7.1 × AgGaS2 at 1064 nm laser) and wide infrared (IR) transparent regions (0.45–17.6 μm for 1, 0.64–20.3 μm for 2). Furthermore, theoretical studies revealed that their SHG effects originate from two functional building motifs (FBMs) CdQ4 and SiQ4 tetrahedra, shedding light on the exploration of new IR NLO materials with mixed FBMs.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Tao An,Huanhuan Jia,Linfeng Peng,Jia Xie
Room-temperature solid-state sodium batteries have the remarkable potential to simultaneously achieve high safety, high energy density, and low cost. However, their current performance is far below expectations. Through material and interfacial modification based on Na3PS4 solid electrolytes, progress is made toward stable room-temperature solid-state sodium–sulfur (Na–S) batteries. First, the ionic liquid N-butyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (Pyr14FSI) is employed to modify the anode/electrolyte interface. An overpotential of 0.55 V after 900 h of a symmetrical battery indicates enhanced interfacial stability. A stable in situ solid electrolyte interphase layer is formed at the interface of NaSn alloy and Na3PS4, proved by X-ray photoelectron spectroscopy measurements. Furthermore, selenium-doped sulfurized polyacrylonitrile (Se0.05S0.95@pPAN) is used to boost the ionic and electronic conductivities of the sulfur cathode. As a result, the Na–S battery using a Se0.05S0.95@pPAN cathode and the interfacial modification delivers stable cycle performance and enhanced rate capability.
✓ 已验证
DOI
高影响因子
Alexandria Engineering Journal
·
2024
·
IF 6.2
Hong Zhang,Ming Chen,Tiantian Liang,Zanpeng Zhang,Changhui Yang
The use of nanocarbon materials to enhance the toughness of fragile cementitious materials has attracted increasing attention for investigation. This study examines the effects of incorporating graphene oxide (GO) into NaOH-activated slag (AAS) pastes and mortars, focusing on workability, phase composition, mechanical properties, and the local mechanical properties of the interfacial transition zone (ITZ) between sand and paste. The experimental results indicate that the addition of GO decreases the flowability of NaOH-AAS pastes, with noticeable aggregation at concentrations above 0.03 wt%. Furthermore, GO enhances the hydration degree of ground granulated blast furnace slag (GGBS), leading to an increased amount of C-A-S-H gel without introducing new phases. In terms of macro performance, incorporating 0.03 wt% GO significantly improves the compressive and flexural strengths of NaOH-AAS mortars by 10.6 % and 17.9 %, respectively. Additionally, the presence of GO reduces the ITZ thickness from 30 to 15 micrometres in NaOH-AAS mortars, which likely contributes to the enhanced mechanical performance.
研究领域:
材料科学
·
水泥基材料
·
纳米复合材料
·
建筑材料化学
·
界面工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Zhenyu Zhang,Changlei Huang,Ze Liu,Chengkai Li,Danni Zeng,Rongfeng Guan,Changjian Zhou
Clean and sustainable energy conversion technology is a key contemporary scientific topic, and photocatalytic hydrogen production offers a new way to address the energy crisis. Here, based on the synergistic strategy of vacancy engineering and S-scheme heterostructure construction, a bifunctional photocatalyst of MoS 2 /ZnIn 2 S 4 -Vs (MoS 2 /ZIS-Vs) with sulfur vacancies (Vs) was developed by one-pot hydrothermal method. The best sample’s hydrogen production efficiency was 75.34 mmol·g −1 ·h −1 , which is 21 times higher than that of unmodified ZIS (3.42 mmol·g −1 ·h −1 ). Meanwhile, under air atmospheric conditions, its H 2 O 2 yield is 1126.66 μmol·g −1 ·h −1 , which is approximately 1.92 times that of ZIS (587.20 μmol·g −1 ·h −1 ). Under oxygen atmosphere conditions, this rises to 2144.84 μmol·g −1 ·h −1 , which is approximately twice the amount in an air atmosphere. Multiple characterizations show MoS 2 /ZIS-Vs’s vacancy engineering and heterostructure adjust ZIS’s band structure, enhance light absorption, and boost charge separation/transfer, with good stability. The DFT calculations show that MoS 2 /ZIS-Vs has an extremely low Gibbs free energy (−0.03 eV). This indicates that the synergistic action of the S-scheme heterojunction and sulfur vacancies significantly reduces the reaction barrier, thereby improving hydrogen and H 2 O 2 production efficiency. The research findings show that it has important application value in the field of solar energy conversion.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Dongyang He,Kangning Zhang,Chuanhao Liu,Ya-nan Zhang,Hao Yang,Jingyuan Dong,Jiao Qu
Solar disinfection (SODIS), as a point-of-use (POU) water disinfection strategy for controlling waterborne microorganisms, serves millions of residents daily in over 50 low- to middle-income countries lacking basic drinking water services. However, SODIS is time consuming (6-48 h of sunlight exposure) due to its strong dependence on UV photons, which account for only ~4% of the solar energy. Thus, it is desirable to capture additional energy from visible-light photons (~50% of the solar energy) to accelerate the slow kinetics. Here, we use phosphorene nanoflakes (PNs) and BiOI nanosheets (BS) as model materials to construct a heterojunction photocatalyst, illustrating that simultaneously modulating the interfacial interaction and band alignment between the heterojunction components can achieve a dual optimization of the kinetic and thermodynamic constraints in photo-induced charge carriers, effectively enhancing the utilization of visible-spectrum energy for microbial inactivation. Notably, a subminute photocatalytic water disinfection performance is demonstrated by the PNs/BS heterojunction, completely inactivating 7 log of E. coli within 45 s under real sunlight. This results in a first-order disinfection rate ~221 times greater than that of commercial P25 TiO 2 . This work provides insights into the design of potent antimicrobial photocatalysts for POU water disinfection applications. The study demonstrates a phosphorene/BiOI heterojunction that achieves sub-minute water disinfection, offering insights into the design of efficient photocatalytic antimicrobial materials.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANO
·
2024
·
IF 1
Junxiang Mo,Jun Li,Jing Li,Yashan Li
The development of composite materials is a key area of research for enhancing the electrochemical performance of electrode materials. In this study, NiCo–S nanostructured hybrid electrode materials were prepared on nickel foam (NF) by using binary metal–organic frameworks (MOFs) as the sacrificial template through a two-step hydrothermal method. Ni–MOF was then deposited on the surface of NiCo–S/NF through the hydrothermal method and subsequently converted into Ni(OH) 2 through a subsequent alkalization treatment. The duration of the Ni–MOF hydrothermal process was varied as a parameter. NiCo–S@Ni–MOF/NF was prepared through hydrothermal reaction for 6 h, 9 h and 12 h, followed by heating in a 6 M KOH solution at 75 ∘ C for 6 h in a water bath. The electrode materials with the best morphology and electrochemical properties were obtained when the hydrothermal reaction time was 6 h. The optimized electrode had a specific capacity of 2533.2 F ⋅ g − 1 at 1 A ⋅ g − 1 and a capacity retention rate of 60.8% at 10 A ⋅ g − 1 , which indicated good rate performance. Additionally, the electrode material demonstrated excellent cycling stability, with a capacity retention rate of 95.3% after 5000 cycles at 50 mV ⋅ s − 1 . The energy density of the hybrid supercapacitor device assembled from this electrode material was 33.5 Wh ⋅ kg − 1 when the power density was 849.89 W ⋅ kg − 1 at a current density of 1 A ⋅ g − 1 .
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Xiang Li,Qiyao Li,Ping Du,Yunzhu Wang,Sufang He,Nengsheng Liu,Chunxia Liu
Covalent organic frameworks (COFs) are promising materials for wastewater purification owing to their wide photoresponse range, abundant active sites, adjustable porosity, and efficient electron transfer. In this work, a novel S-scheme heterojunction was constructed by coupling bismuth-rich bismuth iodide oxide Bi 4 O 5 I 2 with functional β-ketoenamine COFs (TATP) via in-situ solvothermal reaction. The optimized composite 2-TPBI exhibits enhanced photocatalytic activity, achieving 88.55 % TC removal within 120 min under visible light irradiation. This performance enhancement is attributed to improved light absorption and efficient spatial separation of photogenerated charge carriers by the S-scheme heterojunction. This work opened up a new avenue for designing high-performance heterostructured photocatalysts through an inorganic/organic coupling strategy for efficient wastewater remediation.
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2020
·Vol. 4
·期 9
·2000220
·
IF 7.527
Kanghua Li,Yue Lu,Xiaoxing Ke,Sen Li,Shuaicheng Lu,Chong Wang,Siyu Wang,Chao Chen,Jiang Tang
Antimony chalcogenides (including Sb 2 S 3 , Sb 2 Se 3 , and Sb 2 (S,Se) 3 alloy) have emerged as promising solar absorber materials. Notably, the Sb 2 (S,Se) 3 alloy possesses continuously tunable bandgap from 1.1 to 1.7 eV, which covers the ideal bandgap for single-junction photovoltaics governed by the Shockley–Queisser theory. Moreover, the bandgap gradient provides effective ways for photogenerated carriers collection and has the potential for high-efficient Sb 2 (S,Se) 3 alloy solar cells. Herein, a V-shaped distributional bandgap in Sb 2 (S,Se) 3 solar cells is reported through a simple dual-source vapor transport deposition process, enabling the synergetic increase of the open-circuit voltage ( V OC ) and short-circuit current ( J SC ). Through careful optimization, a power conversion efficiency of 7.27% under AM1.5G illumination is obtained, with V OC and J SC of 0.46 V and 29.6 mA cm −2 , respectively. This V-shaped bandgap engineering provides an effective method to enhance the device performance and can be extended to other chalcogenide thin-film solar cells such as Sn–X, Ge–X, Cu–Sb–X (X = S and Se), and so on.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）