ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Li Luo,Dekang Li,Yuying Dang,Wei Wang,Guangsuo Yu,Jin Li,Baojun Ma
A non-noble metal cocatalyst with capacitance is cost-effective and has excellent photocatalytic H2 evolution performance for water splitting. But the intrinsic action of capacitance is unclear. Here, by controlling the capacitance of Mo2C, we reported a volcanic curve relationship between the photocatalytic activity of Mo2C/CdS and the capacitance of Mo2C. At the middle capacitance of 18.95 F/g of Mo2C-a4, Mo2C-a4/CdS exhibits the best H2 evolution activity of 5560 μmol/g/h. When Pt is introduced on the surface of Mo2C, the photocatalytic activity of (Pt/Mo2C-a4)/CdS is further enhanced to 8090 μmol/g/h. Comparing the activities between (Pt/Mo2C)/CdS and Mo2C/CdS with the capacitance of Mo2C, the activity ratio and difference values increase and finally reach a plateau with the increasing capacitance. Electrochemical and photoelectrochemical studies demonstrate that the capacitance of Mo2C has dual opposite effects (positive and negative) in photocatalytic reactions. The capacitance can capture electrons and store them, thereby enhancing the separation efficiency of photoexcited carriers of CdS. However, overlarge capacitance constrains the stored electrons and prevents them from releasing, thus decreasing the cocatalytic efficiency, which can be resolved in some degree by introducing some Pt on Mo2C. This work elucidates the dual effects of capacitance and puts forward the concept of capacitance catalysis.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Min Qiu,Jiaxin Li,Huijuan Xie,Jiamin Feng,Qi Huang,Yin Tian,Haozhou Huang,Li Han,Dingkun Zhang
Bitterness masking is a crucial technical hurdle in the development and application of oral liquid medicines. Small-molecule excipients, such as cyclodextrin, often provide insufficient bitterness masking, thus prompting the exploration of large-molecule excipients, especially polysaccharides. In this study, the bitterness-masking effects of 10 polysaccharides were assessed using berberine as a model. Only iota-carrageenan significantly reduced the bitterness of berberine, decreasing it from strong to slight. A comparative study of the bitterness-masking mechanisms of three polysaccharides revealed that carrageenan polymer chains formed an interwoven network, decreasing the release of berberine by 40 %. Moreover, -OSO₃ − groups on the polymer chains exhibited strong electrostatic interactions with the N + in berberine, significantly reducing the electron cloud density of N + . This combined effect traps berberine within the “net-hook” structure of the iota-carrageenan, markedly weakening the activation of bitter receptors by the berberine. Ultrasonic treatment-induced disruption of the iota-carrageenan network structure yielded a 29 % reduction in bitterness-masking efficacy, while carrageenan with a lower -OSO₃ − content achieved a 40 % reduction in efficacy. In conclusion, the “net-hook” structure of natural polysaccharides is a necessary condition for them to exert a bitterness-masking effect. This finding provides a scientific basis for expanding the applications of natural polysaccharides in taste-masking.
研究领域:
药学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2018
·
IF 3.306
Wen Xu,Xiaofeng Dai,Teng Zhang,Tao Wang
Copper complex conductive inks inevitably contains water which is derived from chemicals and humid air. The dual effects of water on the performance of copper complex conductive inks with amines as ligands were investigated for the first time. On one hand, excess water caused the deterioration of copper complexes by interacting with amines to produce high concentration of OH − , yielding basic salt, hydroxide or oxide precipitate, which shortened the shelf life of copper inks. The degree of deterioration was related to the amine’s coordination ability and alkalinity. On the other hand, trace water could accelerate the thermal decomposition of copper complexes, promote the nucleation of copper, and yield smaller particles to form copper films with denser structure and lower resistivity. The blending of 2-ethylhexylamine (EtHex) and 2-amino-2-methyl-1-propanol (AMP) as ligands to copper formate (Cuf) could balance the dual effects of water on copper complex conductive inks. It was found that Cuf-EtHex-AMP (with 95 mol% EtHex in blended ligands) ink showed strong water resistance. The shelf life of the blended complex ink with additional 2 wt% water was still more than 2 months. The additional water enabled the formation of highly conductive copper films at low heating temperature. The resistivity of the copper film from the blended complex ink with additional 2 wt% water stored for 2 months only increased a little compared to that from the newly prepared ink (from 9.70 μΩ·cm to 14.42 μΩ·cm), which could meet the general requirements of printed electronics.
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
APPLIED THERMAL ENGINEERING
·
2022
·
IF 6.465
Chunting Zhou,Fengze Lv,Zihan Wan,Yanan Wang,Chunhuan Luo
To improve the flexibility of absorption thermal energy storage (ATES) cycle, including lower the generation temperature, larger the operating temperature region and combined cooling and heating for 24 h, a double-effect/two-stage absorption refrigeration and thermal energy storage hybrid cycle using LiBr/H 2 O and LiBr-[BMIM]Br/C 2 H 5 OH working fluids is proposed in this paper. The cycle includes an absorption heat pump (AHP) sub cycle and an ATES sub cycle. Based on the measured thermophysical properties, the thermodynamic performance of this new cycle under different working conditions was calculated by MATLAB. According to the results, the hybrid cycle obtained a low generation temperature of 385 K, attributed to the utilization of the low-temperature working fluid LiBr-[BMIM]Br/C 2 H 5 OH. Moreover, the evaporation temperature of 268.15 K expanded the operating region of the hybrid cycle, and the highest COP and ESD of 2.37 and 394 kJ·kg −1 were obtained at that temperature, respectively. More importantly, the cycle realized combined cooling and heating all day long, with a cooling output temperature range of 268.15–278.15 K and a heating output temperature range of 321–344 K, which can fully meet the demands of commercial and civilian applications. To further verify the feasibility of the cycle, the model sensitivity and chemical potential achieved in the hybrid cycle were analyzed.
研究领域:
能源工程
·
热力学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Si Li,Xiang Kang,Qing He,Weiwei Tang,Junbo Gong
Designing (macro)molecules controlling crystallization is an essential approach to regulate structure and properties of crystalline materials and circumvent detrimental mineralization in nature, biological, and synthetic systems. Here we discovered four novel, natural polyphenols, including gallic acid, ellagic acid, punicalagin, and tannic acid, as a new class of inhibitors for nucleation and crystal growth of calcium oxalate (CaOx), a primary constitution of kidney stones. Study of time-resolved growth reveals that polyphenols regulate the kinetics of crystal-liquid interface acting as a dual role of growth promoter and inhibitor which displays a new record of growth promotion up to 75% or complete suppression, dependent upon the modifier concentration. Time-elapsed in situ atomic force microscopy measurements unveil these modifiers regulate the growth mode from spiral-mediated to generation of two-dimensional (2D) islands and layer spreading mechanism, leading to formation of step bunches growing out of (0 1 0) surface and forming macroscopically crystal whiskers. The governing regime between growth promotion and inhibition is determined by inhibitors concentration but can be influenced by crystallization driving force. Such unique growth mechanism of crystal whiskers may also provide potential implications for understanding and synthesizing branched and hierarchical structures of biomimetic materials.
研究领域:
生物化学
·
材料科学
·
医学
✓ 已验证
DOI
高影响因子
FLUID PHASE EQUILIBRIA
·
2021
·
IF 2.775
Zhendong Wang,Shuo Chen,Bingxiao Feng,Hongbing Song,Meng Xiao,Hengjun Gai,Tingting Huang
Extracting phenol from coal tar has great economic significance. In this paper, a process for separating phenol from coal tar using mono-ethanolamine (MEA) as extractant was proposed, the conceptual design and optimized of the process was carried out by using Aspen Plus software. To ensure the accuracy of simulation, the vapor-liquid equilibrium data of MEA + phenol binary system were measured under different pressures. The binary interaction parameters of NRTL model, Wilson model and UNIQUAC model were fitted with the experimental data by data regression system. The results show that the deviation of NRTL model is less than that of Wilson model and UNIQUAC model. Considering that the boiling point difference between MEA and phenol is only 10°, two energy-saving schemes of double effect distillation are introduced into the conceptual process proposed in this paper, which can save 20% and 44.8% respectively compared with the traditional single tower distillation process . This paper provides reference for the industrial application of MEA in the extraction of phenol from coal tar.
研究领域:
化学工程
·
分离科学
·
热力学
·
能源化工
·
工业催化
✓ 已验证
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2017
·
IF 4.164
Hongchang Qian,Minglu Li,Zhong Li,Yuntian Lou,Luyao Huang,Dawei Zhang,Dake Xu,Cuiwei Du,Lin Lu,Jin Gao
In this study, a multilayer antibacterial film was assembled onto 316L stainless steel via mussel-inspired depositions of polydopamine (PDA) and silver (Ag) nanoparticles followed by post-modification with 1H, 1H, 2H, 2H-perfluorodecanethiol. The resulting surface exhibited excellent superhydrophobicity with hierarchical micro/nanostructures that were constructed by both PDA and Ag nanoparticles. The crystal structure and chemical composition of these surfaces were investigated using X-ray photoelectron spectroscopy (XPS) analysis. Potentiodynamic polarization measurements revealed that the corrosion resistance of the as-prepared surfaces were sequentially increased after each step of the fabrication process. Compared with the surface covered with only Ag nanoparticles, the superhydrophobic surfaces exhibited substantially enhanced antibacterial activity against the Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus , resulting from the synergistic antibacterial actions of the superhydrophobic surface and Ag nanoparticles. The superhydrophobic surface exhibited lower cytotoxicity, compared to the surface covered with Ag nanoparticles.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2019
·
IF 3.571
Shunyu Xiang,Xing Lv,Linhai He,Huan Shi,Shuyue Liao,Changyun Liu,Qianqiao Huang,Xinyu Li,Xiaoting He,Haitao Chen,Daibin Wang,Xianchao Sun
Improving plant resistance against systemic diseases remains a challenging research topic. In this study, we developed a dual-action pesticide-loaded hydrogel with the capacity to significantly induce plant resistance against tobacco mosaic virus (TMV) infection and promote plant growth. We produced an alginate–lentinan–amino-oligosaccharide hydrogel (ALA-hydrogel) by coating the surface of an alginate–lentinan drug-loaded hydrogel (AL-hydrogel) with amino-oligosaccharide using electrostatic action. We determined the formation of the amino-oligosaccharide film using various approaches, including Fourier transform infrared spectrometry, the ζ potential test, scanning electron microscopy, and elemental analysis. It was found that the ALA-hydrogel exhibited stable sustained-release activity, and the release time was significantly longer than that of the AL-hydrogel. In addition, we demonstrated that the ALA-hydrogel was able to continuously and strongly induce plant resistance against TMV and increase the release of calcium ions to promote Nicotiana benthamiana growth. Meanwhile, the ALA-hydrogel maintained an extremely high safety to organisms. Our findings provide an alternative to the traditional approach of applying pesticide for controlling plant viral diseases. In the future, this hydrogel with the simple synthesis method, green synthetic materials, and its efficiency in the induction of plant resistance will attract increasing attention and have good potential to be employed in plant protection and agricultural production.
研究领域:
植物病理学
·
农业科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Tingting Zhong,Lei Shi,Huiying Hao,Jingjing Dong,Kunpeng Tang,Xiang Xu,Shindume Lomboleni Hamukwaya,Hao Liu,Jie Xing
In order to further promote the commercial application of perovskite solar cells (PSCs), it is particularly important to fabricate devices in the ambient air condition. Herein, we explore a simple method to reproduce high-efficiency and stable PSCs using the one-step anti-solvent deposition conducted in the full ambient air. NH4Ac (ammonium acetate), which is green and environmentally friendly, is first introduced into an anti-solvent (ethyl acetate) to enhance the photovoltaic performance and stability of devices. NH4+ causes the intermediate phase to undergo a process of cation exchange, thereby delaying crystallization. Ac– makes the additive and A-site cation form hydrogen bonds, which in turn makes the intermediate phase more stable. The dual effects of NH4+ and Ac– delay the crystallization of the perovskite film, reduce the density of defect states, and decrease the non-radiative recombination of carriers. By optimizing the concentration of NH4Ac, a champion power conversion efficiency (PCE) of 20.41% and an average PCE of 19.46 ± 0.64% are achieved, which is currently one of the highest efficiencies in fabricating PSCs under the full ambient air condition. Furthermore, the corresponding PSCs without encapsulation can maintain 82% of its initial PCE when stored in full ambient air condition (30–40% RH) for 30 days.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Ji Ao,Xin Zhang,Yunhao You,Yuxiang Chen,Zequan Liu,Jie Gao,Chenyang Qin,Lingwan Hao,Jie Zhao,Rujian Jiang
Implant-associated infections and excessive immune responses are two major postsurgical issues for successful implantation. However, conventional strategies including antibiotic treatment and inflammatory regulation are always compromised due to the comodification of various biochemical agents and instances of functional interference. It is imperative to provide implant surfaces with satisfactory antibacterial and anti-inflammatory properties. Here, a dual-effect nanostructured polyetheretherketone (PEEK) surface (NP@PDA/Zn) with bionic mechano-bactericidal nanopillars and immobilized immunomodulatory Zn2+ is designed. The constructed hybrid nanopillars display remarkable antibacterial performance against Gram-negative and Gram-positive strains through the synergy of physical and chemical bactericidal effects imposed by nanopillars and Zn2+. Meanwhile, the immunoregulatory property is evaluated through the investigation of macrophage polarization both in vitro and in vivo, and the results reveal that NP@PDA/Zn could downregulate the expression of M1-related cytokines and decrease the M1 macrophage recruitment to lower the inflammatory response. Notably, the surface exhibited exceptional biocompatibility with discerning biocidal activity between bacterial and mammalian cells and antioxidant performance that effectively scavenges ROS, minimizing potential cytotoxicity. Taken together, NP@PDA/Zn presents a convenient and promising strategy of combining synergistic bactericidal activity and inflammatory regulation without any mutual interference, which can support the development of multifunctional implant-associated materials.
研究领域:
生物材料
·
纳米技术
·
免疫学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ETHNOPHARMACOLOGY
·
2020
·
IF 3.69
Ying-Qi Li,Yi Chen,Jia-Yi Fang,Si-Qi Jiang,Ping Li,Fei Li
Ethnopharmacological relevance Osteoporosis (OP) and Alzheimer's disease (AD) are common geriatric concurrent diseases, and many studies indicate the connection of their pathogenesis. Cistanche tubulosa (Schenk) Wight (CT) is a widely used traditional Chinese medicine and has been extensively applied to treat OP and AD, respectively. However, the active ingredients for both concurrent diseases simultaneously and underlying mechanisms are limited. Aim of study This work aimed at establishing an effective and reliable network screening method to find dual-effects compounds in CT that can protect AD and OP concurrently. And it will provide new perspectives of the link between OP and AD on molecular mechanisms. Material and methods The dual-effects of CT were systematically analyzed with integrating multiple databases and extensive analysis at a network pharmacology level. Classified drug-target interaction network was constructed to reveal differences in effects between different types of compounds. To prove the effectiveness of this network, some compounds were selected to verify in Pre-induced OP model and AlCl 3 -induced AD model of zebrafish according to the topological parameters. Results 22 dual-effects active ingredients in CT were initially screened out via network pharmacology with a closely connection with 81 OP and AD-related targets. Classified network analysis found the better bioactivities of phenylethanoid glycosides and flavonoids . The dual-effects of four selected compounds demonstrated that the network is reasonable and effective, suggesting the dual-effects of the remaining 18 compounds. Moreover, we identified 9 putative targets and two pathways that were significantly related to OP and AD. Conclusions We successfully identified 22 dual-effects active components in CT. This systematic screening strategy provided a new protocol to objectively discover multi-effects compounds of traditional Chinese medicine, and even a macroscopic perspective that will improve our understanding of the link between OP and AD on molecular mechanisms.
研究领域:
药理学
·
老年医学
·
传统中药
·
分子生物学
·
神经科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）