RSC Advances
·
2015
·Vol. 5
·期 86
·70178-70185
·
IF 3.84
Mingfang Ma,Jinge Gu,Minmin Yang,Zhaolou Li,Zhuoqun Lu,Yimeng Zhang,Pengyao Xing,Shangyang Li,Xiaoxiao Chu,Yajie Wang,Qi Li,Minyan Lin,Aiyou Hao
Sodium benzoate is an important and widely used food additive, however, its self-assembly properties in diverse solvents have been rarely studied. Here, we report different self-assembled aggregates, including sodium benzoate vesicles and sodium benzoate gel, in different solvent environments. Sodium benzoate vesicles and gel were identified by Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM) and Dynamic Light Scattering (DLS). Ultraviolet-visible (UV-vis) spectroscopy, Fourier Transform Infrared (FT-IR) spectroscopy, Thermal Gravity Analysis (TGA), Differential Scanning Calorimetry (DSC) and Small-Angle X-ray Scattering (SAXS) were further employed to study the formation mechanism of the sodium benzoate gel. A possible gel formation mechanism was proposed. Furthermore, sodium benzoate gel has multiple stimulus responsiveness, the addition of hydrochloric acid and metal ions can all cause disaggregation of sodium benzoate gel. Finally, sodium benzoate aggregates were found in calf serum.
研究领域:
材料科学
·
食品科学
·
化学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Shengnan Bi,Junwei Ye,Peng Tian,Guiling Ning
Complex morphologies in nature often arise from the assembly of elemental building blocks, leading to diverse and intricate structures. Understanding the mechanisms that govern the formation of these complex morphologies remains a significant challenge. In particular, the edge-base plate growth of biogenic crystals plays a crucial role in directing the development of intricate bioskeleton morphologies. However, the factors and regulatory processes that govern edge-base plate growth remain insufficiently understood. Inspired by biological skeletons and based on the soluble property of boric acid (BA) in both water and alcohols, we obtained a series of novel BA morphologies, including coccolith, and anemone biological skeletons. Here, we unveil the “inscribed circle effect”, a concise mathematical model that reveals the underlying causative factors and regulatory mechanisms driving edge-base plate growth. Our findings illuminate how variations in solvent environments can exert control over the edge-base plate growth pathways, thereby resulting in the formation of diverse and complex morphologies. This understanding holds significant potential for guiding the chemical synthesis of bioskeleton materials.
研究领域:
晶体学
·
生物矿化
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Pengfei Wang,Wanhong Lü,Mingyue Wang,Lili Yang,Fengyou Wang,Huilian Liu,Maobin Wei,Jinghai Yang,Lin Fan
We use a two-step spin-coating method to construct efficient and non-hysteresis planar perovskite solar cells (PSCs). The influence of solvent environment on the precursor configuration, perovskite crystallization kinetics , and photoelectric properties of the PSCs are systematically studied, resulting in novel insights into the function of dimethyl sulfoxide/dimethylformamide (DMSO/DMF) blend solvent (BS). The DMSO/DMF BS promotes the construction of porous “rod-like” precursor film, which provides sufficient space for lattice expansion and orientation selection during perovskite growth, thus producing high-quality perovskite absorbers with high crystallinity . Moreover, DMSO/DMF BS also induces the formation of amorphous lead chloride (PbCl 2 ) and stores it in the final perovskite film, effectively passivating perovskite defects, extending carrier lifetime, and significantly improving device performance. As a result, a DMSO/DMF-based planar PSC is prepared with reverse efficiency of 19.69% and forward efficiency of 19.54%. Moreover, devices show a good stability over 500 h and reproducibility in 20 pieces fabricated with the same procedure. This study provides a new concept for the preparation of high-quality perovskite absorbers and highly efficient planar PSCs, and represents an important contribution toward determining the potential influence of solvent engineering on perovskite crystallization kinetics.
研究领域:
材料科学
·
能源科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Mengjie Chen,Hongxia Gao,Teerawat Sema,Min Xiao,Qiang Sun,Zhiwu Liang
Several alkanolamines (1A2P, 2A1P, AMP, MAE, EAE, and IPAE) were selected to study the steric hindrance effect on reaction kinetics between amine and CO 2 in ethanol and aqueous solutions. Pseudo first-order reaction rate constant k 0 was measured by the stopped-flow apparatus. Zwitterion mechanism was applied to describe the reaction and the k 0 was well fitted by the corresponding kinetic model with average absolute relative deviation (AARD) in a range of 1.08%-3.89%. Apparent second-order reaction rate constant K A revealed that the reaction rate is simultaneously controlled by steric hindrance and pKa of amines. Additional alkyl groups increase the steric hindrance of amines and accelerate the decomposition of zwitterions. As a result, the reaction rate decreases with stronger steric hindrance effect. The larger pKa is conducive to a better proton receiving of amine. This leads to an acceleration of the deprotonation reaction of zwitterion intermediate. In addition, the relative influence of steric hindrance and pKa on the reaction kinetics is also related to the solvent environment.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
De Zhang,Pei Liang,Zhi Yu,Jie Huang,Dejiang Ni,Haibo Shu,Qian-min Dong
In this paper, the flower-shaped silver nanoparticle was used as substrate to investigate the SERS effect of pesticide molecules under different treatment conditions. Due to the variation of molecular structure and molecular interactions with pH value and solvent type, the combination mode of molecules and metal surface and electron transfer also changes, resulting in different SERS effects with a certain regularity. It was demonstrated that the optimum pH values for test conditions are in the range of 6.66–11.11 due to the auxiliary of H + ions and undestroyed complete functional groups of ethion. Meanwhile, the ethion in the acetone was the best in the three solvents (ultrapure water, absolute ethanol and acetone). Under optimal conditions, ethion can be detected with a minimum detectable concentration of 10 −10 M. The regression model obtained through principal component analysis (PCA) can be used for rapid and precise detection of the concentration of ethion, suggesting the importance of condition optimization for SERS test. Therefore, the solvent environment can be effectively improved to promote non-resonance enhancement of chemical bonding between adsorbate and metal substrate and resonance enhancement of light-induced charge transfer in molecular-metal system by excitation light. The solvent environment has significant effect on the SERS sensor from chemical enhancement.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Hao Xu,Lihui Xiao,Peixia Yang,Xiangyu Lu,Lilai Liu,Dan Wang,Jinqiu Zhang,Maozhong An
Zeolitic imidazole framework (ZIF)-derived iron–nitrogen-carbon (Fe N C) materials are expected to be high-efficiency catalysts for oxygen reduction reaction (ORR). However, increasing the density of active sites while avoiding metal accumulation still faces significant challenges. Herein, solvent environment engineering is used to synthesize the Fe N C containing dense Fe-N x moieties by adjusting the solvent during the ZIF precursor synthesis process. Compared with methanol and water/methanol, the aqueous media can provide a more moderate Fe content for the ZIF precursor, which facilitates the construction of high-density Fe-N x sites and prevent the appearance of iron-based nanoparticles during pyrolysis. Therefore, the Fe N C(C) nanocubes synthesized in an aqueous media have the highest single atom Fe loading (0.6 at%) among the prepared samples, which presents excellent oxygen reduction properties and durability under alkaline and acidic conditions. The advantage of Fe N C(C) is proven in Zn-air batteries, with outstanding performance and long-term stability.
研究领域:
材料科学
·
电化学
·
能源科学
✓ 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）