Catalysis Science & Technology
·
2017
·Vol. 7
·期 20
·4640-4647
·
IF 5.773
Fangfang Wu,Xiaoqin Sun,Gang Liu,Xiaoxiang Xu
Despite a strong visible light absorption at a wavelength as far as 610 nm, SrTaO2N generally exhibits poor photocatalytic activity due to photocatalytic self-decomposition. In this study, we introduce Na into the B site of SrTaO2N and perform an investigation on its crystal structure, optical absorption and photocatalytic water oxidation in response to Na incorporation. Our results suggest that Na incorporation effectively enhances local Ta–O(N) bond strength, which is responsible for strong interband light absorption, low tendency to defect formation and high stability against photocatalytic self-decomposition. Efficient photocatalytic water oxidation was realized in Na-modified SrTaO2N (Sr0.8Na0.2TaO2.8N0.2) with an apparent quantum efficiency as high as 0.2% under visible light illumination (≥400 nm). This simple strategy highlights the benefits of alkaline metal modification and can be extended to other nitrides or oxynitrides where management of local bond strength is needed.
研究领域:
材料科学
·
光化学
·
能源转化
·
表面化学
·
无机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Dongmei Li,Zhiwei Zhu,Da-Wen Sun
Raman spectroscopy has been employed for studying water structures in biomolecular aqueous solutions for decades but challenges remain to quantify the hydrogen bonding strengths in complex aqueous solution systems. In this study, four kinds of saccharide aqueous solutions were employed to investigate the quantitative relationship between the hydrogen bonding strength of water using confocal Raman microscopy and the Raman spectra of these solutions in the range of 3000–3800 cm −1 . Results showed that the enhancement effect of saccharide molecules on the hydrogen bonding strength of water increased with the concentration, and the degree of changes in the strength was related to the hydration capability and partial molal volume of saccharide molecules. An equation based on the average number of hydrogen bonds of water molecule was proposed to quantify the bonding strength in saccharide aqueous solutions with satisfactory accuracy as verified by T 2 relaxation time using nuclear magnetic resonance spectrometer.
研究领域:
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Zhiwei Zhu,Jiayu Mai,Tian Li,Da-Wen Sun,Qingqing Zeng,Xiaohui Liu,Zhe Wang
Supercooling is a main controllable factor for the fundamental understanding the high-pressure shift freezing (HPSF). In the study, a self-developed device based on the diamond anvil cell (DAC) and confocal Raman microscopy was utilized to realize an in-situ investigation of supercooling behaviour during HPSF of the pure water and sucrose solution. The spectra were used to determine the freezing point which is shown as a spectral phase marker (S D ). The hydrogen bond strengths of water and sucrose solution under supercooling states were estimated by peak position and peak area ratio of sub-peaks. The results showed that the O H stretching bands had redshift under supercooling states. Moreover, the addition of sucrose molecules could strengthen the hydrogen bonding strength of water molecules under supercooling states. Thus, the DAC combined with Raman spectroscopy could be considered a novel strategy for a deep understanding of the supercooling behaviour during HPSF. URLs: http://www.ucd.ie/refrig , http://www.ucd.ie/sun .
研究领域:
生物物理学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Yiwen Cao,Xinyi Chen,Yingzhan Li,Yaping Wang,Houyong Yu,Ziheng Li,Ying Zhou
Because of the fascinating properties and tremendous application potential of nanocellulose aerogels (CAs), research into them has exploded. However, regulating and controlling their microstructure remain challenging. Herein, the strategy of regulating the strength of hydrogen bonding was used to investigate the cause of cellulose nanofiber (CNF) aggregation. Three kinds of silane coupling agents with different tail functional groups were employed to modify CNFs. The hydrogen bond fraction of CAs decreased from 0.41 to 0.33, indicating a decrease in the intensity of hydrogen bonding. Also, the CA with a 3D-web-like structure was obtained. The specific surface area of the aerogels increased from 44.36 to 99.37 m2/g, showing that the aggregation was limited. In parallel, superior mechanical properties and thermal insulation were obtained. These results showed that varying the intensity of the hydrogen bond could inhibit the aggregation of the CA skeleton structure. The improvement of the specific surface area will expand its application in catalyst support, environmental remediation, heat insulation, and other fields. This method paved the way for future studies on the control of the micro-structure of CAs.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Wenjing Ma,Mingjun Tang,Siying Li,Yongqun Ma,Min Ling,Wenqian Sheng
This study explored the extraction of polyphenols from Juniperus chinensis Roxb. using natural deep eutectic solvents (NADES), emphasizing the role of hydrogen bonding strength in enhancing extraction efficiency. Choline chloride-fructose emerged as the most effective NADES after evaluating the correlation between hydroxyl stretching vibrations and polyphenol yield. Using the response surface methodology, the optimal extraction process (liquid to solid ratio 50.6 mL/g, extraction temperature 41.1 °C, extraction time 29.8 min, ultrasonic time 14.9 min) was determined to have a yield of 27.90 ± 0.14 mg/g, more than double that of water extraction. Choline chloride-fructose showed a more pronounced disruptive effect on plant powders. Additionally, compared to water extracts, the extracts using choline chloride-fructose exhibited higher antioxidant potential and quercitrin content. Overall, this study explores the correlation between hydrogen bond strength and extraction yield, while optimizing a green and efficient alternative process for polyphenol extraction from plants. These findings align with green chemistry principles, contributing to the development of sustainable and environmentally friendly extraction methods.
研究领域:
植物化学
·
食品科学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2019
·Vol. 65
·期 8
·e16616
·
IF 3.463
Daofei Lv,Jiayu Chen,Yongwei Chen,Zewei Liu,Yuzhi Xu,Chongxiong Duan,Houxiao Wu,Ying Wu,Jing Xiao,Hongxia Xi,Zhong Li,Qibin Xia
Metal–organic frameworks (MOFs) combined with selective adsorption capacity of ethane over ethylene and good moisture stability are highly urged by adsorption industrial community. Here, the moisture stability mechanism of Zr-bptc, UiO-66, PCN-245, and Ni(bdc)(ted) 0.5 were investigated by moisture stability experiments, and computational simulation of metal node-linker breaking energy caused by water. Results show that the moisture stability follows the order of Zr-bptc > UiO-66 > PCN-245 > Ni(bdc)(ted) 0.5 . The different moisture stability for these MOFs is likely attributed to the bond strength between metal center and ligands, the coordination number of metal center, the hydrophobicity of framework, as well as the degree of interpenetrated framework. Additionally, comparing with ethylene-selective MOFs, ethane-selective MOFs have fewer coordinatively unsaturated metal sites. Breakthrough experiments indicated that Zr-bptc is the promising material for ethane/ethylene separation.
研究领域:
材料化学
·
配位化学
·
气体分离
·
多孔材料
·
工业吸附
✓ 已验证
DOI
高影响因子
NATURE MATERIALS
·
2025
·
IF 38.5
Li Ziyue,Lin Yuxiao,Garaga Mounesha N.,Greenbaum Steven G.,Liao Mochou,Ruan Jiafeng,Li Qin,Li Yunsong,Sun Dalin,Xu Kang,Fang Fang,Wang Fei
Proton conduction in hydrogen-bond-rich protic electrolytes enables fast mass and charge transport, crucial for electrochemical energy storage and power conversion. Such transport can give proton-based batteries exceptional rate capability and low-temperature operation beyond other working ions. Here we show that in phosphoric acid (H 3 PO 4 ) electrolytes, vehicular and structural proton transport coexist, and their contributions to conductivity can be quantitatively distinguished. We link structural diffusion directly to hydrogen-bond strength, enabling the precise tuning of proton migration. Guided by this, we reveal a double conductivity peak from regulated structural diffusion. The optimal electrolyte (5.8-M H 3 PO 4 ) achieves high overall (232.9 mS cm −1 ) and structural (164.9 mS cm −1 ) conductivity. A MoO 3 ‖ CuFe-TBA battery with this electrolyte outperforms a deep-eutectic benchmark (8.3-M H 3 PO 4 ), delivering >17,474 W kg −1 at room temperature and retaining 15.1 Wh kg −1 at −75 °C. These findings provide a framework for designing advanced protic electrolytes across electrochemical systems.
研究领域:
电化学
·
能源材料
·
物理化学
·
储能技术
·
质子传导材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Physics
·
2023
·
IF 11.5
Sitong Wei,Lu Yu,Zipei Zhang,Zhen Ji,Sitong Luo,Jingxuan Liang,Weiyu Song,Shuqi Zheng
Cu 3 SbSe 4 -based thermoelectric materials , known for their complex crystal structure and splendid Seebeck coefficient , have garnered significant attention. However, a major challenge in this field is further enhancing the thermoelectric performance while effectively controlling the carrier concentration. In this work, a novel doping strategy is proposed to effectively adjust the energy band structure by Mn doping while simultaneously increasing the carrier concentration and the effective mass of the density of states , thereby optimizing the power factor. Additionally, Sn doping is employed to boost the carrier concentration significantly while strengthening the covalent bonds , thereby improving the samples’ stability. As a result, the Cu 3 Sb 0.92 Mn 0.06 Sn 0.02 Se 4 sample achieves a zT value of 0.74 at 673 K. Moreover, the Cu 3 Sb 0.93 Mn 0.06 Sn 0.01 Se 4 sample exhibits an average zT value of 0.39 within the temperature range of 273–675 K. This research sheds light on an approach for designing high-performance Cu 3 SbSe 4 -based thermoelectric materials by manipulating the carrier concentration and enhancing the covalent bond strength through doping.
研究领域:
材料科学
·
热电学
·
固体物理学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2025
·Vol. 18
·期 1
·14
·
IF 36.3
Huang Yu-Hua,Zou Su-Yan,Sheng Cong-Yi,Fang Yu-Chuang,Wang Xu-Dong,Wei Wei,Li Wen-Guang,Kuang Dai-Bin
A lattice-anchoring strategy using low-dimensional perovskite addresses structural instability in α-formamidinium lead iodide (FAPbI 3 ) by matching crystal lattice, mitigating residual stress and tensile strain.
Enhanced Pb-I bonding strength and reduced lattice strain improve structural stability and carrier mobility-lifetime product, enabling efficient charge transport.
Optimized X-ray detectors achieve high sensitivity (1.83 × 10 5 μC Gy air –1 cm –2 ), low detection limit (27.6 nGy air s –1 ), and stable performance under prolonged irradiation.
研究领域:
材料科学
·
凝聚态物理
·
半导体器件
·
辐射探测
·
纳米科技
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2024
·
IF 4.1
Yindong Cong,Yi Zhou,Jianna Bao,Xianming Zhang
The effect of metal-ligand coordination on crystallization and melting behaviors of polymers has not been comprehensively investigated. In this study, a series of supramolecular poly( l -lactic acid)s (SM-PLLAs) were prepared by changing various metal ions , length of polymer chains and stoichiometric ratio of ligands to metal ions (L/M). The complexation of metal ions with ligands in SM-PLLAs was confirmed by the intrinsic viscosity and UV–visible spectroscopy. It was found that crystallization rate and crystallinity of SM-PLLAs were strongly dependent on the chain length of precursor in both non-isothermal and isothermal crystallizations. With chain length of 1.6 kg/mol, crystallization of PLLA was completely suppressed regardless of the metal ions, whereas PLLA with longer chain length of 3.0 kg/mol exhibited strong dependence of the type of metal. During the heating process, melting behaviors can be tuned by the strength of metal-ligand coordination, temperature and the degree of complexation. Unlike PLLA precursor and SM-PLLA coordinated with Cu 2+ exhibited multiple melting behaviors, only a single melting peak was appeared in PLLA bonded with Co 2+ , indicative of suppression of recrystallization during heating. With ratio of ligand to Co 2+ increased from 1:1 to 6:1, crystallization and melting behaviors were tuned by the content of free and bounded PLLA chains. As compared to Cu 2+ , SM-PLLA coordinated with Co 2+ exhibited higher complex modulus and viscosity due to the high bond strength , as well as a more stable structure underwent heating and shear, making diffusion of polymer chains and the structural adjustment more difficult. This work may shed light on understanding the intricate interplay of metal-ligand coordination effects on the crystallization and melting behaviors of polymers, which may be helpful with the design and making out the relationship between structure and properties of supramolecular polymers .
研究领域:
聚合物科学
·
材料科学
·
超分子化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
·
IF 14.7
Zhu Jinfeng,Ren Qingyong,Chen Chen,Wang Chen,Shu Mingfang,He Miao,Zhang Cuiping,Le Manh Duc,Torri Shuki,Wang Chin-Wei,Wang Jianli,Cheng Zhenxiang,Li Lisi,Wang Guohua,Jiang Yuxuan,Wu Mingzai,Qu Zhe,Tong Xin,Chen Yue,Zhang Qian,Ma Jie
While phonon anharmonicity affects lattice thermal conductivity intrinsically and is difficult to be modified, controllable lattice defects routinely function only by scattering phonons extrinsically. Here, through a comprehensive study of crystal structure and lattice dynamics of Zintl-type Sr(Cu,Ag,Zn)Sb thermoelectric compounds using neutron scattering techniques and theoretical simulations, we show that the role of vacancies in suppressing lattice thermal conductivity could extend beyond defect scattering. The vacancies in Sr 2 ZnSb 2 significantly enhance lattice anharmonicity, causing a giant softening and broadening of the entire phonon spectrum and, together with defect scattering, leading to a ~ 86% decrease in the maximum lattice thermal conductivity compared to SrCuSb. We show that this huge lattice change arises from charge density reconstruction, which undermines both interlayer and intralayer atomic bonding strength in the hierarchical structure. These microscopic insights demonstrate a promise of artificially tailoring phonon anharmonicity through lattice defect engineering to manipulate lattice thermal conductivity in the design of energy conversion materials.
研究领域:
材料科学
·
热电材料
·
凝聚态物理
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 44
·16773-16780
·
IF 8.067
Jiawei Lin,Muwei Zhang,Niu Sun,Shihui He,Xusheng Zhang,Zhongnan Guo,Jing Zhao,Quanlin Liu,Wenxia Yuan
Zero-dimensional (0D) tetrahedral Mn(II) hybrids as narrow-band green emitters show great potential for the backlighting of liquid crystal displays. However, the factors influencing the full-width at half-maximum (fwhm) of green emission in the 0D Mn hybrid systems still need to be understood in depth. In this work, the regulation of the fwhm of green-emitting tetrahedral Mn(II) hybrids has been investigated from the structural distortion and hydrogen bond strength points of view. Two 0D Mn-based OIMHs with cyclic organic cations, (MDPA)2MnBr4 (1, MDPA = N-methyldiphenylaminium) and (MTPP)2MnBr4 (2, MTPP = methyltriphenylphosphonium), have been synthesized. Both of them contain isolated [MnBr4]2− tetrahedra and show green emission at 540 and 518 nm upon 450 nm excitation. It is found that the fwhm of compound 2 (48 nm) is much narrower than that of 1 (62 nm), and we demonstrate that it is associated with the smaller distortion of the Mn(II) tetrahedron in 2. Furthermore, Hirshfeld surface calculations suggest that this smaller distortion could be contributed by the weak hydrogen bonds between the organic cations and the [MnBr4]2− units in 2 compared to that in 1. We found that the other tetrahedral Mn(II) bromides reported in previous literature also show this behavior. Meanwhile, the triboluminescence emission is observed in both 1 and 2, ascribed to the polarized charges on the crystal surface. A white light-emitting diode device was fabricated using compound 2 with a high PLQY (55.66% upon 450 nm). Our work not only provides an insight to understand in depth the role of structural distortion and hydrogen bond strength in regulating the fwhm of the Mn(II) tetrahedron, but also provides feasible rules to explore the new narrow-band green-emitting OIMHs.
研究领域:
材料科学
·
光电
·
固体化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）