INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
·
IF 3.9
Qiang Cao,Caizhen Zhan,Yuchao Deng,Da-Wei Pan,Xiao-Jie Ju,Rui Xie,Zhuang Liu,Wei Wang,Liang-Yin Chu
Immobilization of multiple enzymes in particles creates opportunities to organize a complex network of biochemical reactions for continuous cascade catalysis. In this work, hydrogel particles integrated with enzyme/CaCO3 nanoparticles are created via droplet-template synthesis for the continuous cascade catalysis of CO2 into methanol. Three enzymes, including formate dehydrogenase (FateDH), formaldehyde dehydrogenase (FaldDH), and alcohol dehydrogenase (ADH), are separately immobilized in these CaCO3 nanoparticles inside the hydrogel particles. The obtained FateDH/CaCO3@PEGDA, FaldDH/CaCO3@PEGDA, and ADH/CaCO3@PEGDA hydrogel particles enable good performance for cascade enzymatic catalysis in batch, showing a higher conversion rate than the free enzymes and the hydrogel particles coencapsulated with the three enzymes. Meanwhile, these enzyme/CaCO3@PEGDA hydrogel particles exhibit good repeatability for the cascade enzymatic catalysis, typically showing a ∼12% decrease in conversion rate after 7 cycles. Moreover, these enzyme/CaCO3@PEGDA hydrogel particles are filled in a U-shaped reactor for continuous cascade enzymatic catalysis. When three units of such reactors are sequentially used, these enzyme/CaCO3@PEGDA hydrogel particles allow efficient conversion of CO2 dissolved in solution into methanol, exhibiting a maximum methanol yield at 6.00 mM. This work provides a simple, environmentally friendly, and low-cost strategy for creating multienzyme-immobilized particles for cascade enzymatic catalysis.
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DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Wenxi Cheng
Lignocellulosic fiber (LCF)/CaCO 3 (CG)/thermoplastic starch (TPS) composites were prepared by blending LCF/CG hybrid (82/18, g/g) with glycerin and corn starch in different weight ratios (0/35/100, 27/35/100, 54/35/100 and 81/35/100, g/g/g) at 130℃, which were then characterized by rheology, XRD, SEM and DSC analysis, tensile test and soil burial test. When the dosage of LCF/CG was not more than 54 g, LCF and CG in LCF/CG/TPS composites were well dispersed, and the corresponding composites had better rheological properties. XRD results showed that the crystallinity of TPS in the presence of LCF/CG was significantly reduced after melt blending process, which caused by the inhibition effect of LCF on the crystallization of TPS. The tensile test results showed that the tensile strength, modulus and elongation at break of LCF/CG/TPS composite were better than those of pure TPS. Besides, due to the looser structures, LCF/CG/TPS composites biodegraded faster than pure TPS.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
POLYMERS & POLYMER COMPOSITES
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2020
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IF 1.023
Zongqian Wang,Yu Li,Yinchun Fang,Ganyu Feng,Jingjing Xu
Nano-CaCO3-modified polypropylene (PP) nonwoven fabric composite is widely used as the filter material which could overcome the poor lightfastness and low weight of the pure one, while its aging performances would be influenced. In this article, the aging behavior of the nano-CaCO3-modified PP nonwoven fabric composite was investigated. At first, the difference between untreated and CaCO3-modified PP nonwoven fabric was analyzed by scanning electron microscopy, thermogravimetric/differential thermal analysis, and X-ray diffraction. Then the aging behaviors of these two PP nonwoven fabrics were studied in detail. The results showed that the PP nonwoven fabric exhibited good acid corrosion resistance. On the contrary, acid corrosion resistance of the modified PP nonwoven fabric was poor; although its weight and strength didn’t change under weak acid condition, its weight and strength loss both increased obviously under medium and strong acid condition with the prolongation of corrosion time. Due to the ultraviolet (UV) energy dissipation of nano-CaCO3 particles, the UV aging resistance of the modified PP nonwoven fabric was improved, and the compound UV aging under weak acid condition was also superior to that of the untreated PP fabric. This article will provide experimental and theoretical base for the structural regulation of CaCO3-modified PP fibers.
研究领域:
材料科学
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高分子科学
·
纺织工程
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DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2024
·Vol. 90
·期 3
·777-790
·
IF 2.5
Zeng Guisheng,Gong Baichuan,Li Yingpeng,Wang Kun,Guan Qian
View large Download slide View large Download slide Close modal Superhydrophobic coatings with excellent self-cleaning performance have attracted significant concerns from researchers. Although various superhydrophobic coatings with prominent superhydrophobic properties have been fabricated, most developed coatings are still inadequate in pipeline scale inhibition applications. In this work, nano-silica (nano-SiO 2 ) was modified by silane coupling of vinyltriethoxysilane (VETS) and 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane (PFTS) to prepare a superhydrophobic coating. Organosilicon of PFTS and VETS was grafted onto the surface of SiO 2 for preparing the superhydrophobic coating with low surface energy, and the superhydrophobic coating was cured via poly(vinylidene fluoride) (PVDF). The results showed that the contact angle of the prepared silica-based superhydrophobic coating, denoted as VETS-PFTS@SiO 2 /PVDF, is 159.2°, exhibiting outstanding superhydrophobicity performance. Furthermore, the superhydrophobicity coating also showed satisfactory durability performance in 200 g load wear test after 50 cycles. Importantly, the superhydrophobic coating displayed promising mechanical durability, chemical stability performance, as well as maintained excellent superhydrophobic properties after being placed in water for 3 weeks, indicating the potential for long-term utilization. In the simulated scale inhibition test, it was found that the synthesized coating can also significantly decrease the deposition rate of CaCO 3 and successfully enhance its scale inhibition performance . A self-cleaning VETS-PFTS@SiO 2 /PVDF coating with superhydrophobicity was prepared simply and environmentally. The superhydrophobic product exhibited a good durability and adaptability in air. Contact angle of water on the superhydrophobic surface is more than 155°. The prepared coating has potential application in scale inhibition of pipelines.
研究领域:
材料科学
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表面化学
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Ming Jing,Yanhong Ji,Liuchun Zheng,Xi Liu,Zunbo Han,Jiayi Cai,Rui Bai,Benqiao He
Biodegradable membrane materials can be degraded into small molecules under natural conditions, which can effectively alleviate the environmental pollution caused by the waste of traditional organic membrane materials. In this work, biodegradable poly (butylene succinate) (PBS)/nano-CaCO 3 hybrid membranes has been prepared via non-solvent induced phase separation method by blending environmentally friendly nano-CaCO 3 particles with PBS. The incorporation of nano-CaCO 3 particles into the membrane leads to a notable enhancement in mechanical strength , from 1.03±0.05 MPa to 1.42±0.13 MPa, resulting in a substantial increase of approximately 37 %. Additionally, the introduction of these particles also contributes to a reduction in contact angle, from 63° to 56°. Consequently, the issue of inadequate mechanical strength and limited hydrophilicity of PBS membrane is effectively addressed. Moreover, the pure water permeance of membrane increases from 8.5 L·m −2 ·h −1 ·bar −1 to 89.3 L·m −2 ·h −1 ·bar −1 , and the permeability is greatly improved. The permeance recovery rate of the membrane increases from 78 % to 95 %, and the anti-fouling performance is improved. In addition, PBS can be degraded after the service of PBS/nano-CaCO 3 hybrid membrane, and CaCO 3 particles are environmentally friendly. Therefore, the PBS/nano-CaCO 3 hybrid membrane hybrid membrane prepared in this study is a green and environmentally friendly membrane material.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Weiguo Chen,Yishuang Lu,Yize Xu,Yujiang Chen,Shuai Lin,Xin He,Chunfeng Zhang,Chunsu Yuan
Developing efficient nanomedicines to modulate the immunosuppressive tumor microenvironment (TME) is a highly sought-after method for improving the adverse clinical outcomes of immunotherapy. In this study, we designed a novel tumor immune stimulatory nanomedicine to regulate the immunosuppressive TME in multiple directions. This nanomedicine is liposome-modified amorphous calcium carbonate (ACC) nanoparticles (referred to as CEL/ACC-LP NPs) loaded with chemotherapeutic medication celastrol (CEL). CEL/ACC-LP NPs explosively release calcium ions (Ca 2+ ) and CEL in the tumor acidic microenvironment, and rapidly deplete H + to alleviate the tumor acidic microenvironment, exhibiting intrinsic immune regulatory activity in synergistic tumor chemoimmunotherapy. CEL induces reactive oxygen species (ROS) to promote Ca 2+ influx, exacerbating cellular Ca 2+ overload. In addition, CEL/ACC-LP NPs can cause unique immunogenic cell death (ICD) effects. Therefore, the multi-directional regulation of tumor cells through simple nano preparation will offer a potent approach to improve the efficacy of chemoimmunotherapy.
研究领域:
纳米技术
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肿瘤学
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免疫疗法
·
药学
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2019
·
IF 8.456
Yunlong Guo,Yuejuan Sun,Da-Peng Yang,Jiajun Dai,Zhilin Liu,Yisong Chen,Jiale Huang,Qingbiao Li
Fabricating the highly dispersive and stable Pt nanoparticles (NPs) on an economical and environmentally friendly support is of great concern in the field of catalysis. Herein, a waste eggshell was used as the support to prepare supported Pt catalysts through a plant-mediated biosynthesis method, in which the Pt precursor was reduced to Pt NPs by employing Cacumen platycladi (CP) leaf extract. The temperature and atmosphere for thermal treatment of such eggshell-supported Pt catalysts were assessed to understand their effects on catalytic performance toward the oxidation of benzene. The optimal Pt/eggshell-Ar (calcined at 400 °C in Ar) demonstrated that the temperature required for 90% benzene conversion (T90%) was as low as 178 °C (80 000 mL g–1 h–1) and could operate steadily for at least 300 h of onstream reaction. The structure of the catalyst after reaction is much the same as that of the unreacted one. Transmission electron microscopy (TEM), thermogravimetry (TG), and X-ray photoelectron spectroscopy (XPS) results showed that Pt NPs were evenly distributed on the eggshell supports, and the calcination conditions had important influences on the residual CP leaf extract, the average Pt NPs size, and the ratio of Pt0/Pt2+ over the catalysts. Density functional theory (DFT) calculations indicated that the interactions between Pt NPs and porous CaCO3 could promote benzene activation adsorbed onto the Pt NPs. In addition, biogenic Pt catalysts were proved to overtake the chemically reduced counterparts in the field of catalytic performance; furthermore, both biogenic and chemically reduced Pt NPs supported on the eggshell demonstrated preferable catalytic activity than that of commercial 5Pt/C (com-Pt/C) catalysts. Collectively, immobilizing biogenic noble metal active components on the eggshell-based support could be a promising approach for the preparation of supported noble metal catalysts with excellent catalytic performance toward catalytic oxidation of volatile organic compounds (VOCs).
研究领域:
催化化学
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Caili Li,Yingjie Li,Chunxiao Zhang,Zhiwei Chu,Yi Fang
CaCO 3 /CaO thermochemical energy storage based on concentrated solar power plant is a promising technology because of its high working temperature and energy storage capacity. Papermaking white mud (PWM) from paper mill is a potential CaO-based precursor due to its high content of CaCO 3 . Herein, a novel Ca 3 B 2 O 6 -modified PWM was synthesized to examine its thermochemical energy storage performance. The influences of the types and dopant amounts of B 2 O 3 precursors on the energy storage capacity of Ca 3 B 2 O 6 -modified PWM were discussed. The stable Ca 3 B 2 O 6 -modified PWM with the mass ratio of CaO to Ca 3 B 2 O 6 = 88:12 exhibits superior energy storage performance and heat transfer property during CaCO 3 /CaO cycles. The effective conversion and energy storage capacity of Ca 3 B 2 O 6 -modified PWM are approximately 0.67 and 2129.6 kJ/kg at 31st cycle, respectively, which are 2.48 and 1.76 times as high as those of PWM and pure CaCO 3 , respectively. The introduction of Ca 3 B 2 O 6 improves the sintering resistance and thermal conductivity of PWM, resulting in higher cyclic stability and lower decomposition temperature of CaCO 3 . Ca 3 B 2 O 6 enhances the basicity and improves the strong basic sites of PWM, which is beneficial for the adsorption of CO 2 , leading to greater CO 2 adsorption capacity. Moreover, Ca 3 B 2 O 6 increases the oxygen vacancy concentration of PWM, which is conducive to the diffusion of O 2– and production of CO 3 2– , further improving energy storage capacity. Hence, Ca 3 B 2 O 6 -modified PWM seems to be a suitable energy storage material for the CaCO 3 /CaO process.
研究领域:
材料科学
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能源工程
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高影响因子
Acta Geotechnica
·
2023
·Vol. 18
·期 10
·5299-5318
·
IF 5.7
Zhao Chang,Xiao Yang,Chu Jian,Hu Ran,Liu Hanlong,He Xiang,Liu Yi,Jiang Xiang
Enzymatically induced carbonate precipitation (EICP) in heterogeneous subsurface is of interest in various geoscience and environmental applications. Through fabricating microfluidic cells with different pore networks, the pore-scale formation of biological CaCO 3 was investigated experimentally by transverse mixing using time lapse high-resolution camera. The precipitation pattern over time was processed to obtain the evolution of distribution of CaCO 3 volume fraction. The impact of flow rate and pore-scale heterogeneity were quantitatively evaluated with reaction index including overall pore filling ratio, precipitation rate and precipitation efficiency. The results showed that low flow rates and strong heterogeneity in porous media are the two favorable conditions for precipitation process due to more nucleation sites. At grain scale, a statistic of three-dimensional morphologies of individual crystals was evaluated with specific surface area and degree of anisotropy. Localized precipitates in multiple pores were adopted as a representative of the whole porous media. The analysis showed that the complex pore structures are generated due to precipitates in pores, thus limiting transport of reactants and result in the permeability reduction. We furthermore confirmed different polymorphs of calcium carbonate, mainly containing vaterite and calcite. Pore-scale analysis of biological CaCO 3 in porous media significantly contributes to the understanding of advection–diffusion-reaction coupling effect, and further revealing the role of pore network on biomineralization process.
研究领域:
地质科学
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环境科学
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生物矿化
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2021
·
IF 3.196
Qi Yao,Ruifeng Zhan,Hegang Ren,Bo Yang,Ying Yang
Stringent water resources scarcity and severe environmental restriction requires environmentally friendly and efficient scale inhibitors exploitation. Functionalization of polyamidoamine dendrimers for scale inhibitor was performed using 2-phosphate-1, 2, 4-butane tricarboxylic acid (PBTCA) and succinic anhydride (SA). In this study, PBTCA modified polyamidoamine dendrimers (PAMAM-1), SA modified first and second generation polyamidoamine dendrimers (CAMAM-1 and CAMAM-2) are prepared. Static scale inhibition method is employed to assess the scale inhibition efficiency of linear low molecular polyacrylic (LPAA), PBTCA, PAMAM-1, CAMAM-1 and CAMAM-2 against CaCO 3 and CaSO 4 . The results show that carboxyl terminated polyamidoamine dendrimers has excellent scale inhibition performance comparable to PBTCA and PAMAM-1. Compared to LPAA and PBTCA, dendritic structure can effectively improve the scale inhibition performance of the scale inhibitor. Furthermore, the scale inhibition performance enhances with increasing generation of carboxyl-terminated polyamidoamine dendrimer. The inhibition efficiency of CAMAM-2 against CaCO 3 and CaSO 4 is about 96.3% and 95.2% at a concentration of 10 mg/ L. Moreover, The CAMAM-2 performs above 85% scale inhibition at Ca 2+ concentration is 4000 mg/L and 90% scale inhibition at border pH 5–9. The FT-IR, XRD and SEM-EDX results show that the CaCO 3 changes from stable calcite to metastable aragonite and vaterite, and the needle like structure of CaSO 4 is destroyed to small crystals. CAMAM-2 only occupies the crystallization site and distorts the lattice of calcium scale in the crystal growth process rather than adsorb on the final crystal surface. This paper provides data support for the application of phosphate or carboxyl terminated polyamidoamine dendrimer in scale inhibition.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Bin Shao,Yongjun Jiang,Su Li,Zhicheng Xie,Zhi-Qiang Wang,Sheng Dai,Honglai Liu,Feng Qian,Jun Hu
High-temperature calcination of carbonate minerals in energy-intensive industrial sectors is one of the greatest contributors to global carbon dioxide (CO2) emissions. The hydrogenation of the most abundant carbonate minerals could potentially mitigate unavoidable CO2 emissions by converting them into value-added products, but progress has been hindered by a limited understanding of this process. Here, we aim to elucidate the underlying mechanism of self-induced direct hydrogenation of carbonates (DHC) to produce metal oxides and syngas at relatively lower temperature without using any catalysts. Various in situ technologies corroboratively illustrate H2 molecules can penetrate into CaCO3 to form multiple CaO/CaCO3 interfaces, resulting in porous CaO. The density functional theory calculations reveal the neighboring O and C sites at the active CaO/CaCO3 interface are responsible for the heterolytic dissociation of H2, leading to the progressively self-induced DHC. An intrinsic microkinetic analysis by tracing the formation rate of the intermediate further verifies its self-induced catalytic characteristics. This subverts the consensus regarding the infeasible self-catalysis of stable ionic crystals. By lowering the temperature to 650 °C, 100% CaCO3 conversion is achieved with a CO selectivity of 91.8% in a packed bed reactor. Inspired by extensive applications of DHC to various carbonates, this innovative idea of treating carbonates as a White Carbon resource may pave a breakthrough pathway toward Carbon Neutrality in the industry.
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高影响因子
Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Qian Liang,Yufei Tang,Yuting Song,Bo Zhang,Yani Sun,Kang Zhao,Zixiang Wu
The fabrication of composites with nacre-like structures through the ordered integration of ceramics and organic components represents an effective approach to developing high strength and toughness bone implant materials. Traditional preparation methods typically involve high-temperature sintering followed by the infiltration of organic substances. While these methods can achieve high strength, the uniformity and depth of organic substance penetration into the ceramic matrix were constrained by pore size, leading to an uneven distribution. Additionally, the interface bonding between the organic and ceramics was limited to physical bonding, which restricts the enhancement of fracture toughness. In this study, nacre-mimetic hydroxyapatite (HA)-Calcium carbonate (CaCO 3 )/sodium alginate (SA) layered composites were fabricated utilizing a combination of roll rolling and the sinterless characteristics of calcium phosphate bone cement (CPC). The SA contains oxygen groups that form bonds with Ca 2+ in the HA layer. The bending strength of nacre-mimetic HA-CaCO 3 /SA layered composites can achieve 9.04 MPa, which was comparable to that of human trabecular bone. Repeated roll rolling lead to a lamellar dispersion of SA in the composite, with an average thickness of 0.19 μm. The fracture toughness of the layered composite was 13.89 MPa m 1/2 , which was higher than that of cortical bone due to deflection extension path of the crack under bending stress, crack passivation, crack bifurcation and crack bridging. The layered composites exhibit excellent biocompatibility, promoting the proliferation and adhesion of osteoblasts. This characteristic was crucial for developing bone implant materials that match both the mechanical and biological properties of human bones.
研究领域:
生物材料学
·
骨科医学
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DOI
高影响因子
危险品化学品经营许可证（带存储）