PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2015
·Vol. 17
·期 15
·10080-10085
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IF 4.493
Zhaoming Liu,Yadong Hu,Hongqing Zhao,Yang Wang,Xurong Xu,Haihua Pan,Ruikang Tang
Living organisms such as corals can carry out CO2 looping efficiently via biomineralization under ambient conditions. Inspired by this natural process, we establish a solution system of calcium acetate–ethanol–water (Ca(Ac)2–C2H5OH–H2O) for CO2 chemical looping at constant room temperature. The CO2 capture is achieved by its reaction with Ca(Ac)2 to form calcium carbonate (CaCO3) mineral and HAc in the binary solvent with a high C2H5OH content. However, an increase in the H2O content in the system triggers acetic acid (HAc)-induced CaCO3 dissolution to release CO2. The system can be recovered for CO2 capture readily by the replenishment of C2H5OH. This biomimetic mineralization-based CO2 capture/release is controlled by the ionization states of the electrolytes, and is precisely regulated in the C2H5OH–H2O binary solvent. Our attempt highlights the fundamental principle of solution chemistry in reaction control and provides a bioinspired strategy for CO2 capture/release with very low cost and easy availability.
研究领域:
化学
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环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 10
·2738
·
IF 5.076
Jinsong Qi,Shixun Wang,Arsenii Portniagin,Stephen V. Kershaw,Andrey L. Rogach
Lead-free two-dimensional metal halide perovskites have recently emerged as promising light-emitting materials due to their improved stability and attractive optical properties. Herein, a facile room temperature wet milling method has been developed to make Dion–Jacobson (DJ) phase ODASnBr4perovskite microcrystals, whose crystallization was accomplished via the aid of introduced primary alcohols: ethanol, butanol, pentanol, and hexanol. Due to the strong intermolecular hydrogen bonding, the use of ethanol promoted the formation of non-doped ODASnBr4microcrystals, with an emission peaked at 599 nm and a high photoluminescence quantum yield (PL QY) of 81%. By introducing other primary alcohols with weaker intermolecular hydrogen bonding such as butanol, pentanol, and hexanol, [SnBr6]4−octahedral slabs of the DJ perovskite microcrystals experienced various degrees of expansion while forming O–H…Br hydrogen bonds. This resulted in the emission spectra of these alcohol-doped microcrystals to be adjusted in the range from 572 to 601 nm, while keeping the PL QY high, at around 89%. Our synthetic strategy provides a viable pathway towards strongly emitting lead-free DJ perovskite microcrystals with an improved stability.Keywords:Dion–Jacobson perovskites;tin bromide perovskites;photoluminescence;crystallization;primary alcohols
研究领域:
材料科学
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光学
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产品关联
DOI
PubMed
高影响因子
International Journal of Polymeric Materials and Polymeric Biomaterials
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2021
·
IF 2.604
Kun Luo,Li Wang,Xiaohu Chen,Xiyang Zeng,Shiyi Zhou,Peicong Zhang,Junfeng Li
High mineralization activity is a crucial requirement in bone tissue engineering. In this study, a novel calcium citrate compounded amorphous calcium phosphate (CAP)/polyurethanes (PUs) composite porous 3D scaffold was developed by in situ polymerization via gas foaming method. The physical and chemical properties were characterized and discussed. The results showed that the HDI can react mildly with hydroxyl (–OH) groups of PEG, while gas foaming action was caused by the release of CO2 occurred in the reactive process, resulting in a uniform porous structure of PUs scaffold. The porosities of the synthetic PEGCAP porous scaffolds are all above 70% with high interconnectivity, while the porosity decreased 27% with increasing CAP to 40%. Furthermore, the mechanical properties of porous scaffolds enhanced about 16 times after addition of CAP. After immersing in simulated body fluid (SBF), the surface structure of the porous scaffold kept stable, and surface deposits formed, indicating that the porous scaffold has good mineralization activity. In addition, the in vitro cells proliferation assay confirms the excellent bioactivity of PEGCAP porous scaffolds.
研究领域:
生物材料学
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骨组织工程学
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产品关联
DOI
高影响因子
Journal of Building Engineering
·
2023
·
IF 6.4
Mandip Dahal,Yanchen Oinam,Prabhat Vashistha,Jae-Eun Oh,Sukhoon Pyo
This study proposes an innovative approach to develop cementless ultra-high performance concrete (UHPC) by activating ground granulated blast furnace slag (GGBFS) without an alkaline-activating solution. To develop cementless UHPC, calcium oxide (CaO) (5% by weight) was used to activate GGBFS, and calcium formate (CF) was used as an accelerator at concentrations ranging from 0 to 6 wt%. The results showed that CF significantly improved the mechanical properties until 5 wt% and all the samples, including CF, exhibited a compressive strength of over 150 MPa. Uniaxial tensile tests revealed strain-hardening behavior, similar to typical cement-based UHPC. The addition of CF led to an increase in hydration products and pore size refinement, resulting in improved mechanical properties. The life cycle assessment results indicated that the developed UHPC mixture had nearly 70% lower CO 2 emission than cement-based UHPC. The experimental results highlight the potential of this method for sustainable UHPC development.
研究领域:
土木工程
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2023
·
IF 8.8
Zheng Fang,Xiaoping Wu,Fangfang Wang,Fan Li,Xixi Cai,Vincent Guyonnet,Shaoyun Wang
A self-assembled peptides-calcium-Vitamin D 3 ternary delivery system (CSPH-Ca-VD 3 ) was prepared to investigate the promotion of cellular calcium transport. The constructed CSPH-Ca-VD 3 nanocomplex exhibited a spherical structure with a size of 135.2 ± 10.2 nm. Based on the thermodynamic calculation of fluorescent spectra, hydrophobic interaction was shown as the major driving force for this nanocomplex structure. CSPH-Ca-VD 3 nanocomplex possessed excellent stability during simulated gastrointestinal digestion, contributing to the prevention of acid degradation of VD 3 and the enhancement of calcium solubility. Furthermore, the calcium transport efficiency in the form of CSPH-Ca-VD 3 (4 mg/mL) across a Caco-2 cells monolayer was significantly increased 2.3-fold compared to that of free Ca 2+ , mainly attributed to the upregulation in the presence of CSPH-Ca-VD 3 of TRPV6, calbindin D9k and PMCA1b expression in Caco-2 cells. The present study provided a basis for developing a novel delivery system of peptides-calcium chelate with the dual effects of VD 3 protection and calcium uptake promotion.
研究领域:
材料科学
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纳米技术
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生物医学工程
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药学
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细胞生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
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2023
·
IF 6.4
Zihui Liang,Yang Shi,Tian Yuan,Bowen Jin,Yidong Ming,Fengxiang Chen,Shimin Wang,Jing Li,Congcong Wu
The synthetical strategy of methylamine (MA) molecular treatment for fabricating perovskite film has been attracting increasing attention because of the ease of fabrication feature and the high-throughput process. In this approach, we found both of perovskite salts (MAI and PbI2) and crystals have been used as the source materials for the interaction with MA molecules. Even though both alternatives are applicable, the reaction routes toward perovskite crystalline film are distinct, which correlates with the photovoltaic performance and the fabrication process design. Therefore, we systematically studied the difference between perovskite salts and crystals with respect to precursor solubility, crystallization dynamics, perovskite crystal structure, and photoelectric properties. The results show the configuration and the crystallization dynamic of the salts and crystal-derived solution are different. The salt-derived solution consists of iodoplumbate complexes, while the crystal-derived solution is composed of perovskite sheet intermediates. Because of the ordered stacking behavior of the perovskite sheet intermediates, the crystal-derived perovskite films showed faster crystallization and preferred crystal orientation, which results in superior charge carrier transport properties and higher conversion efficiency. The disclosure of the distinct features between salts and crystals provides guidelines to modulate the solution chemistry for higher photovoltaic performance.
研究领域:
材料科学
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光伏技术
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化学工程
✓ 已验证
DOI
高影响因子
Bio-Design and Manufacturing
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2018
·Vol. 1
·期 2
·146-156
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IF 0
Dong Yifan,Duan Haibo,Zhao Naru,Liu Xiao,Ma Yijuan,Shi Xuetao
Bioactive scaffolds with interconnected porous structures are essential for guiding cell growth and new bone formation. In this work, we successfully fabricated three-dimensional (3D) porous \(\upbeta \) -tricalcium phosphate ( \(\upbeta \) -TCP)/calcium silicate (CS) composite scaffolds with different ratios by 3D printing technique and further investigated the physiochemical properties, in vitro apatite mineralization properties and degradability of porous \(\upbeta \) -TCP/CS scaffolds. Moreover, a series of in vitro cell experiments including the attachment, proliferation and osteogenic differentiation of mouse bone marrow stromal cells were conducted to testify their biological performances. The results showed that 3D printed \(\upbeta \) -TCP/CS scaffolds possessed of controllable internal porous structures and external shape. Furthermore, the introduction of CS decreased the shrinkage of scaffolds and improved the in vitro apatite formation activity and degradation rate. Meanwhile, compared with pure \(\upbeta \) -TCP scaffold, the \(\upbeta \) -TCP/CS composite scaffolds were more conducive to promote cell adhesion, spread and osteogenesis differentiation. However, when the content of CS was increased to 45%, the ions dissolution rate of the composite scaffolds was so high that leaded to the increase in pH value, which inhibited the proliferation of cells. Our results suggested that the introduction of appropriate CS into \(\upbeta \) -TCP bioceramic is an effective strategy to prepare bioactive 3D printed bioceramic scaffolds for hard tissue regeneration.
研究领域:
生物材料学
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组织工程学
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医学
✓ 已验证
DOI
Foods
·
2025
·Vol. 14
·期 9
·1594
·
IF 5.1
Jihao Zeng,Xue Bai,Yongli Zhang,Qianyu Le,Jinhong Wu,Huiyun Chen
To develop a highly bioavailable calcium supplement, this study utilized Peruvian squid ( Dosidicus gigas ) skin as a raw material. Through alkaline protease hydrolysis and enzymatic membrane reactor separation, three molecular weight fractions of squid skin peptides were obtained, followed by calcium ion chelation to synthesize calcium-chelating peptides (CCPs-SS). Systematic characterization revealed that the less than 1 kDa fraction of CCPs-SS exhibited superior antioxidant capacity (82.18%) and calcium chelation efficiency (77.14%) in cellular models compared to higher molecular weight counterparts. Optimal synthesis conditions were identified as 60 °C, pH 9, and 12 mg/mL calcium chloride concentration. Post-chelation analyses demonstrated significant physicochemical alterations for CCPs-SS: ζ-potential shifted from −18.4 mV to −10.47 mV, while particle size increased from 476.75 nm to 664.4 nm. Notably, membrane separation enhanced phenylalanine and leucine molar concentrations by 25.5% and 57.6%, respectively, suggesting structural modifications that potentiate bioactivity. These findings demonstrate an innovative strategy for converting squid processing byproducts into functional nutraceuticals, which not only addresses calcium deficiency challenges but also promotes resource sustainability by utilizing waste materials.
研究领域:
食品科学
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营养学
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2024
·
IF 6.9
Fangjun Wang,Shiyi Chen,Shubo Chen,Pengxing Yuan,Lunbo Duan,Wenguo Xiang
As the interest in environmentally-friendly energy processes increases, many studies have been focused on producing hydrogen as an alternative energy carrier via catalytic reaction processes. Sorption enhanced water gas shift (SEWGS) that combines WGS and in situ CO 2 removal is a promising technology for high-purity H 2 production and CO 2 capture. In this study, Fe/Ce-modified CaO-Ca 12 Al 14 O 33 bi-functional porous nanotubes were synthesized in one step by template method and applied for H 2 production from SEWGS process. The unique porous nanotube structure fully exposes the catalytic active sites and facilitates the gas-solid transport, resulting in the excellent H 2 production and CO 2 capture performance in SEWGS/regeneration cycles. The introduction of Ce enhances the basicity of the nanotube material, thereby increasing the affinity for CO 2 . The interaction of Fe-Ce improves the redox capability of Fe 2+ and Fe 3+ , which is beneficial to the conversion of CO. In addition, the formed Ca 2 Fe 2 O 5 and Ca 2 CeO 4 both increase the concentration of oxygen vacancies , further enhancing the SEWGS reactivity of the material. The optimal molar ratio of Fe/Ce/Al/Ca is 10/3/10/100, and the CO conversion, H 2 concentration, CO 2 capture capacity of the Fe/Ce-modified bi-functional material were 76.9 %, 70.1 % and 83.2 % after 20 cycles. The effect of Fe/Ce doping on CaO-based materials was investigated at the molecular level using density functional theory (DFT). The results demonstrate that the addition of Ce can effectively maintain the stable structure of Fe-CaO-based materials. The modification of Fe/Ce is expected to promote efficient H 2 generation from CaO-based materials through the SEWGS process.
研究领域:
能源科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Dali Zhuo,Xiaoyu Dong,Linghuan Li,Ronghua Zeng,Chao Tan,Hong Luo,Zhirong Zou
Calcium ion (Ca 2+ ) is one of the important nutrients for humans, excessive and insufficient intake may both cause diseases, so that it is of great importance to analysis of Ca 2+ in our daily life. In this work, a portable gas pressure meter-based method was developed for the detection of Ca 2+ in water samples and calcium gluconate oral liquids. Ca 2+ in solution was extracted and precipitated by the addition of Na 2 C 2 O 4 , CaC 2 O 4 precipitate was formed and then filtered from the complicated matrix through a filter membrane. The filter membrane (containing CaC 2 O 4 precipitate) was then treated by H 2 SO 4 solution, CaC 2 O 4 precipitate was dissolved during this step and H 2 C 2 O 4 was formed. In a sealed bottle-in-bottle reaction device, H 2 C 2 O 4 reacted with acidic KMnO 4 solution to generate CO 2 gas, causing a significant gas pressure increase and it was readout by a hand-held pressure meter. A standard curve with linear range of 1–80 mmol L −1 and a limit of detection of 0.4 mmol L −1 were obtained. This system was subsequently applied to the detection of Ca 2+ in several water samples and oral liquids, recoveries of 92–110 % were obtained for their spiked samples. Only a few reaction bottles and a gas pressure meter were required in this system. It is a low-cost, sensitive, rapid and easy-used analytical method for on-site determination of Ca 2+ .
研究领域:
分析化学
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营养学
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
CEMENT AND CONCRETE RESEARCH
·
2020
·
IF 8.328
Xin Liu,Pan Feng,Wei Li,Guoqing Geng,Jiale Huang,Yun Gao,Song Mu,Jinxiang Hong
Calcium silicate hydrate (C-S-H), the most important Portland cement hydration product , determines the mechanical properties and durability of cementitious materials . In marine environment, C-S-H often suffers from sulfate attack – one of the most common and severe degradations for concrete. pH is considered as a critical factor in determining the deterioration behavior of C-S-H during sulfate attack, of which the significance may be overlooked. This study focused on the role of pH on the deterioration of C-S-H in terms of the composition and nano/micro structure under sulfate attack. The results show that lowering pH aggravates the decalcification of C-S-H, whereas a strong alkaline condition is beneficial to increase the resistance to deterioration. An increase in the mean chain length together with the proportion of large pores (>10 nm) is observed when C-S-H is subjected to low-pH sulfate attack (pH = 10–12), resulting in a relatively loose structure. The deep analysis on defective tobermorite model reveals that calcium at the interlayer of C-S-H nanostructure is readily removed under sulfate attack, thereby improving the potential of Si-O-Si groups formation and increases the mean chain length of C-S-H.
研究领域:
土木工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2016
·
IF 2.437
Huan Zhou,Shiqin Kong,Zhiwei Liu,Yan Pan,Yang Liu,Mingzhi Luo,Linhong Deng
Calcium polyphosphate (CPP) incorporated calcium alginate (CA) composite beads were prepared via adding sodium polyphosphate (STPP) contained sodium alginate (SA) solution dropwise to calcium chloride (CaCl 2 ) solution. In the process Ca 2+ ion may attach to the -COO − in SA because of electrostatic attraction. Additionally, there is an interaction of PP to Ca 2+ to generate CPP, inducing intermolecular crosslinkages between CA and CPP. The rotational rheometer showed STPP addition had no significant impacts on the rheological properties of SA solution. While a combination of SEM, AFM, FTIR and swelling behavior study demonstrated CPP was successfully formed within the gel network of CA gel beads and played an active role in restricting the movability of the alginate polymer chains. The in vitro study implied CPP can promote the expression of ALP , Col-I, OCN and OPN of osteoblasts.
研究领域:
材料科学
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生物医学工程
·
细胞生物学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）