Journal of Energy Storage
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2025
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IF 9.8
Yuan Yao,Xikun Tian,Jun Yan,Changying Zhao
In light of the widespread adoption of novel energy sources, there is a pressing need for the rapid development of long-term energy storage technologies. While most existing energy storage technologies are prohibitively expensive, the thermochemical energy storage (TCES) system based on CaO/Ca(OH)₂ offers a high storage density of 1400 kJ/kg, low costs, and excellent cycle stability. The choice of expanded graphite (EG) as the matrix is based on its outstanding thermal conductivity and rich microstructure, which enhance heat and mass transfer. This study focuses on the thermochemical properties of Ca(OH)₂ doped by expanded graphite with stable morphology. Five samples with EG contents were synthesized, and characterized with regard to their microstructures, and their thermal and physical properties examined. Additionally, a reaction kinetic analysis of the thermal decomposition process was conducted. The results indicate that the composite with 9 % EG content stands out as the optimal thermal storage material, exhibiting a thermal conductivity of 2.5 W/(m·K), almost three times that of pure material. The activation energy of the composite was calculated to be 166.9 kJ/mol and the pre-exponential factor is 5.5 × 10 11 1/s which is two orders of magnitude higher than the pure. Furthermore, the composite demonstrated exceptional stability during cyclic performance tests, maintaining a conversion rate of 70 % after 10 cycles, confirming its reliability. In conclusion, this research presents a novel approach for the large-scale, low-cost application of TCES in CaO/Ca(OH)₂ systems.
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Journal of Water Process Engineering
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2025
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IF 6.7
Weihao Zhu,Lian Zhang,Peicong Li,Wei Fang,Panyue Zhang
Sewage sludge treatment remains a critical environmental challenge due to its high moisture content and heavy metal contamination. The Fe 2+ /Ca(ClO) 2 /tannic acid (TA) combined conditioning has shown great performances on sludge dewatering, but its influence on heavy metal removal and risk assessment was unclear. In this study the speciation transformation of heavy metals and related mechanisms were comprehensively investigated. The results demonstrated that the sludge conditioning simultaneously enhanced sludge dewatering and promoted heavy metal removal under optimized conditions. Notably, Zn, Cd, and Ni were effectively removed from the sludge solid phase, with removal efficiencies of 39.12 %, 52.49 %, and 30.86 %, respectively. Moreover, the conditioning significantly reduced the ecological risk posed by heavy metals, as indicated by a marked decrease in comprehensive risk index from high to medium levels. The mechanisms involved in the combined effects of oxidation, acidification, and ion binding. Oxidation disrupted extracellular polymeric substance structure, while acidification increased surface positivity, enhancing heavy metal desorption. The Fe 2+ /Ca 2+ competed with heavy metals for binding sites. Additionally, pH reduction and TA chelation further facilitated the transfer of heavy metals into the liquid phase. As a result, the potential mobility index for heavy metals Zn, Cd, Ni, Hg, and As decreased by 33.93 %, 35.98 %, 21.40 %, 26.76 %, and 50.57 %, respectively. This study provides a promising strategy for the safe and resource-efficient utilization of sewage sludge.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2025
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IF 3.8
Yifan Li,Jingyang Wang,Yu Wang,Shuang Cao,Zhenyu Han,Meng Zhang,Lei Zhang
Dion–Jacobson-type (DJ-type) perovskite CsA 2 Nb 3 O 10 (A = Ca, Sr, Ba) is a compound that can simultaneously accommodate Cs + and A 2+ ions and thus considered as a potential immobilization matrix for radionuclides 137 Cs and 90 Sr. In this work, using A 2+ to simulate bivalent alkaline earth metals, CsA 2 Nb 3 O 10 single crystals were synthesized by the molten salt method. CsA 2 Nb 3 O 10 has good thermal stability up to 900°C. At the same time, CsA 2 Nb 3 O 10 has strong radiation resistance, with most crystals maintain their initial morphology with slight color change. Cations with smaller radii, for example, Na + , K + , and Rb + , do not replace Cs + in the interlayer of CsA 2 Nb 3 O 10 and A 2+ in the NbO 6 polyhedron. CsA 2 Nb 3 O 10 demonstrates a wide range of pH durability, where its frame structure remains stable in the pH range from 2 to 12 and will not be decomposed, while Cs + in CsA 2 Nb 3 O 10 loses more into the solution at the pH range from 2 to 4 and from 10 to 12, and the loss of Sr 2+ and Ba 2+ is much lower than that of Ca 2+ due to slight differences in the framework structure. Further sintering of CsCa 2 Nb 3 O 10 and CsSr 2 Nb 3 O 10 result in high density ceramic with a relative density of 94%–97%, along with improved chemical stability. According to the investigation of the surface morphology and elemental chemical state, it can be confirmed that Cs, A, and Nb elements are uniformly distributed on the surface of ceramics. The normalized leaching rates of Cs, Ca, and Sr in the CsCa 2 Nb 3 O 10 and CsSr 2 Nb 3 O 10 ceramic waste forms are about 1, 1, and 10 −4 to 10 −3 g·m −2 ·d −1 after 28 days, respectively.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Ning Li,Hong Shao,Haina Qi,Yuqi Sheng,Liu Yang,Yunrui Xie,Dan Li,Wensheng Yu,Qianli Ma,Xiangting Dong
A simple and universal technique of the combination of uniaxial electrospinning with subsequent peculiar dual-crucible fluorination technology is innovatively designed and used to construct metallic fluorides yolk-shell nanofibers (YSNFs) and yolk-shell nanobelts (YSNBs) directly for the first time. As a case study, Yb 3+ /Er 3+ co-doped alkaline earth metal fluoride (BaF 2 , SrF 2 and CaF 2 ) as core layer and SiO 2 as shell layer are applied to construct the yolk-shell one-dimensional nanostructures . Under the optimum calcination temperature (600 °C) and time (5 h), the obtained MF 2 :Yb 3+ , Er 3+ /SiO 2 (M=Ba, Sr, Ca) samples are of pure cubic phase, and display the yolk-shell nanofibers and yolk-shell nanobelts with good size uniformity and green up-converting fluorescence. By HF acid treatment of the samples, it is not only proved that the shell layer is SiO 2 , but also independent core-layer MF 2 :Yb 3+ , Er 3+ (M=Ba, Sr, Ca) nanofibers and nanobelts with good size uniformity and excellent up-conversion luminescence are obtained. Especially, only fluorination process among the halogenation can form such exceptive YSNFs and YSNBs one-dimensional nanostructures , and the formation mechanisms of YSNFs and YSNBs are proposed and verified, and further the novel technique is established. The new technique possesses the merits of simple device and easy operation, large output, well-defined morphology and high preparative success rate of yolk-shell nanofiber and yolk-shell nanobelt, universality to metallic fluorides. The design philosophy and the construction technique for the exceptional yolk-shell one-dimensional nanostructures afford a facile approach for the fabrication of other functional metal fluorides yolk-shell one-dimensional nanostructures.
研究领域:
材料科学
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纳米技术
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光学
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Inorganics
·
2026
·Vol. 14
·期 10
·250
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IF 3.4
Jinxu Qi,Yanan Kou,Yunyun Zheng,Xianguang Bai,Bin Li
Tumor-mediated hypoxia resistance severely limits the therapeutic efficacy of conventional platinum-based drugs against oral cancer. Targeting carbonic anhydrase IX (CA IX), which is specifically overexpressed in hypoxic tumor cells, represents an effective strategy to reverse chemoresistance. In this work, a novel CA IX-targeting platinum(II) complex was synthesized using pyridoxal 4-sulfamoylphenylhydrazone as the ligand. Single-crystal X-ray diffraction reveals its stable square-planar coordination geometry in the solid state. Enzymatic assays revealed that the complex exhibited negligible inhibition toward the normal CA II isoform and displayed potent inhibitory activity against CA IX (Ki= 26.5 nM), superior to the ligand and the positive control compound U-104. Molecular docking suggests its stable binding to the active pocket of CA IX. In vitro assays exhibited notable hypoxia-selective cytotoxicity against oral cancer HSC-2 cells, with an IC50value of 3.7 ± 0.2 μM under hypoxic conditions. Mechanistic investigations suggest that the complex may induce oral cancer cell death partly by elevating intracellular reactive oxygen species (ROS) levels and activating the mitochondrial-mediated apoptotic pathway. It should be noted that the solution-state behavior, aquation, and hydrolysis of this platinum complex have not been experimentally explored in the present study; thus, the biologically active platinum-containing species remains uncharacterized, and the observed bioactivity cannot be unequivocally assigned to the intact solid-state complex. This study provides new insights and experimental support for the development of hypoxia-responsive platinum-based agents targeting CA IX against oral cancer.
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JOURNAL OF THE ENERGY INSTITUTE
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2026
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IF 6.5
Hanrui Ma,Guangzhe Zhang,Zimeng Han,Tong Hao,Yuxin Li,Kunjie Li,Ruihong Zhao,Jiangze Han,Jingsi Yang
A Ni–Ca–Al 2 O 3 composite catalysts was developed for synergistic biomass gasification tar cracking and CO 2 fixation. • The 10Ni-Ca-Al catalyst exhibited the optimal catalytic performance, achieving a 139.2% enhancement in H 2 yield. • The catalyst showed good durability, with H 2 yield retaining 81.1% after five cycles. • Mechanistic studies further confirmed the synergistic effects among NiO, CaO, and Al 2 O 3 . Biomass gasification is a promising technology for renewable hydrogen production; however, its practical application is constrained by high tar yield and insufficient hydrogen yield. In this study, Ni-Ca-Al 2 O 3 composite catalysts were prepared and applied in a two-stage fixed-bed gasification system to enhance hydrogen production from biomass gasification through the synergistic effects of tar reforming and in-situ CO 2 adsorption. The influences of catalytic temperature, catalyst dosage, and NiO loading on gas composition, tar conversion, and catalyst stability were systematically investigated. The results show that hydrogen yield gradually increased with rising catalytic temperature. Increasing the catalyst dosage further promoted CO 2 capture and tar cracking, thereby enhancing H 2 production. The incorporation of NiO significantly improved catalytic activity, which was attributed to its acceleration of tar reforming, methane steam reforming, and the water–gas shift reaction. Among the catalysts studied, 10Ni–Ca–Al exhibited the best overall performance. Under optimal conditions (600 °C, 5 g catalyst), the gasification of pear branches resulted in increases of 108.7% in H 2 concentration and 139.2% in H 2 yield compared with the blank experiment, accompanied by a substantial reduction in tar yield to 3.6 g/kg and a tar cracking ratio of 79.7%, with a CO 2 adsorption capacity reaching 170 mg/(g cat). Characterization results confirmed that CaO effectively adsorbed CO 2 to form CaCO 3 , while NiO was reduced to metallic Ni; the synergistic interaction between the two components promoted tar cracking and enhanced H 2 yield. Cyclic stability tests demonstrated that the catalyst maintained good catalytic activity after five regeneration cycles. In summary, the Ni–Ca–Al 2 O 3 catalyst, through the dual-function coupling of tar cracking and in-situ CO 2 adsorption, provides a viable strategy for efficient hydrogen production from biomass gasification.
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FOOD CHEMISTRY
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2026
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IF 10.4
Li Xia,Zurong Shi,Guangxin Ren,Wenya Wei,Mingjuan Zhang,Yue Wang,Yun Wang
Ethylene vinyl alcohol-bayberry anthocyanins-carvacrol (EVOH-BAs-CA) membrane is developed for fruit freshness monitoring and maintaining. • BAs endow the membrane antioxidant activity. • Antibacterial activity of the membrane is from the control released CA. • EVOH-BAs-CA membrane has a reversible transparency response to ethanol exudate. In this study, a visual freshness indicator based on electrospun fibers membrane was fabricated, which relies on ethanol-responsive light transmittance to evaluate fruit freshness. Carvacrol (CA) and bayberry anthocyanins (BAs) were incorporated into ethylene-vinyl alcohol (EVOH) matrix to prepare the composite membrane for bayberry freshness monitoring and preservation. The EVOH-BAs-CA membrane was initially opaque and turned transparent, as ethanol (EtOH) exudates released from spoiled bayberry induced a rapid increase in light transmittance during storage. The membrane showed high sensitivity to ethanol exudates, retaining a transmittance above 60% after 10 reuse cycles. Additionally, the EVOH-BAs-CA membrane exhibits strong antibacterial and antioxidant properties and can approximately prolong the freshness of bayberry for 4 days, which resulted from the effective release of CA and BAs. The implementation of the EVOH-BAs-CA membrane in visual freshness monitoring for bayberry highlights its significant potential within intelligent packaging systems. Download: Download high-res image (127KB) Download: Download full-size image
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PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
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2026
·Vol. 14
·期 29
·13326-13338
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IF 7.6
Xu Weixin,Wang Songze,Yang Bingcan,Wang Shuomei,Sang Wenqi,Fan Chen,Yan Feng,Tian Sicong,Wen Zongguo,Han Lujia
Converting lignocellulosic biomass to syngas represents a promising way to integrate renewable hydrogen and carbon resources into sustainable carbon-neutral energy systems. However, the conventional biomass gasification process typically relies on excessive steam input, resulting in significant energy penalties and CO 2 emissions. This study proposed a novel integrated gasification process for syngas production from straw, featuring the self-reforming of straw volatiles and utilization of process CO 2 , enabled by the cooperation of Ca(OH) 2 and Fe 2 O 3 . The contents of Ca(OH) 2 and Fe 2 O 3 were optimized to direct straw hydrogen into the volatiles and straw carbon into the solid phase during pyrolysis, thereby facilitating subsequent H 2 and CO production. The cooperation of Ca(OH) 2 and Fe 2 O 3 was manifested in two aspects: generating in situ steam for the self-reforming of volatiles into H 2 and promoting the secondary conversion of biochar and process CO 2 into CO. The optimized C0.3F0.2 reached a syngas yield of 19.3 mmol/g straw with a H 2 selectivity of 35.8% and a CO selectivity of 28.0%. 34.8% of process CO 2 was captured and utilized as CO rather than emitted. This work provides a sustainable and eco-friendly way for converting the hydrogen and carbon resources into efficient syngas production and falls in the domain of carbon-neutral energy system development.
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ENVIRONMENTAL RESEARCH
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2022
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IF 8.431
Linghui Wei,Meng Li,Yibo Zhang,Qian Zhang
Modified metal-organic framework (MOF) materials are promising adsorbents for phosphate removal in aquatic environment. Herein, a high-efficiency and eco-friendly La/Ca composite (La/Ca-BTC) was designed by calcining La/Ca MOFs for phosphate adsorption. Batch adsorption experiments showed that La/Ca-BTC-3/1 (La: Ca molar ratio of 3: 1) had an excellent phosphate sorption capacity of 101.01 mg P/g, and could also maintain relatively high adsorption in the range of pH 4–8. Anion coexistence experiments showed that, except for carbonate ions, common anions have little effect on adsorption. X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) analysis indicated that oxygen vacancies formed in the La/Ca-BTC, probably by metal doping . The density functional theory (DFT) calculation showed that oxygen vacancies could affect the orbital hybridization energy during phosphate adsorption by changing the state density, reducing the bond energy barrier for phosphate adsorption, thereby enhancing the adsorption effect of La/Ca-BTC. Phosphate adsorbents generally incur severe environmental risk by their gradual release of metal ions due to changes in water quality, especially where there is high natural organic matter (NOM). The DFT calculation further demonstrated that Ca 2+ in the La/Ca-BTC was more inclined to combine with humic acid (HA) than La 3+ . Therefore, due to the introduction of Ca 2+ , La/Ca-BTC exhibited lower La-release in the presence of HA than La-BTC, which could be reduced by about 52.04%. Furthermore, La/Ca-BTC had the potential to simultaneously remove NOM which has important implication for aquatic remediation. These results are of great significance for the development of environmentally friendly phosphate adsorbents.
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高影响因子
Journal of Water Process Engineering
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2022
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IF 7.34
Yuxin Zhang,Yong Wang,Duo Wang,Zhiyu Zhang,Tao Qi,Qingchun Guo
Superwettability modification of membrane surface has attracted extensive attention for efficient oil/water emulsion separation in view of membrane antifouling. The design of micro- and nanoscale structure on membrane surface, which plays an important role in improving wettability is significant but remains challenging. In this study, inspired by polyphenols coating and multifunctional metal-phenolic networks (MPNs), a series of superwettable membranes with double-layer and hierarchical structure derived from PCA coating and various CA-metal ions (nanoparticles) networks were facilely obtained. Specifically, the PCA former layer provided hydrophilic basis, and the CA-metal ions (nanoparticles) networks provided hierarchical micro- and nanoscale structures. The obtained membranes with double layer and hierarchical structures were thus bestowed superhydrophilic, underwater superoleophobic and antifouling features, which made it capable of efficient oil/water emulsion separation with high oil rejection (all higher than 98.8 %). In addition, the obtained membranes possessed satisfactory self-clean ability, stability, and mechanical property. The demonstrated PCA/CA-metal ion (nanoparticles) derived strategy for double-layer and hierarchical structures modification in this work may offer a pave way to endow various materials with superwettability and antifouling property for multiple applications.
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JOURNAL OF LUMINESCENCE
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2022
·
IF 4.171
Kaiming Zhu,Zhanglin Chen,Yuzhen Wang,Hui Liu,Yude Niu,Xin Yi,Yihuan Wang,Xuanyi Yuan,Guanghua Liu
Eu 2+ -doped CaAlSiN 3 ‐type structure nitrides have been extensively studied as a red-emitting phosphors in white light emitting diodes (w-LEDs), but there are few reports of systematic research on the effect of solid solution substitution on their long persistent luminescent properties. In this work, a series of (M,Ca)AlSiN 3 :Eu 2+ (M = Sr, Mg) phosphors have been successfully synthesized by efficient combustion synthesis . We investigated the effect of Sr and Mg solid solution on long persistent luminescent properties. Thermoluminescence (TL) measurements were performed in those persistent phosphors to obtain direct experimental results on the trap depth. The results show that the SrAlSiN 3 :0.2 at% Eu 2+ phosphor exhibits the most intense red persistent luminescence with the persistent time of as long as 200 min at the threshold value of 0.32 mcd/m 2 due to the presence of more trap levels with suitable depths of 0.71 eV. Compared with the solid solution of Sr, the solid solution of Mg ions can increase the depth of trap levels in CaAlSiN 3 . Among them, Mg 0.2 Ca 0.8 AlSiN 3 :0.2 at% Eu 2+ phosphor achieved a maximum trap depth of 0.98 eV, making it a promising candidate for optical information storage applications.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 13
·50099
·
IF 2.52
Dan Zhang,Dehai Meng,Zhongying Ma,Zhihao Zhang,Haozhe Ning,Yuhua Wang
To optimize the poor thermal stability and flammable of polyvinyl alcohol (PVA), a novel environmental-friendly organic–inorganic hybrid flame retardant Ca(H 2 PO 4 ) 2 @HCCP was successfully designed and synthesized via surface treatment technology and used to advance the flame retardancy of PVA. The thermogravimetric analysis implied that Ca(H 2 PO 4 ) 2 @HCCP can enhance significantly the thermal stability and char forming ability of PVA. Combustion results demonstrate that Ca(H 2 PO 4 ) 2 @HCCP could effectively suppress the melt dripping of PVA in the process of combustion. The presence of Ca(H 2 PO 4 ) 2 @HCCP can sharply reduce peak heat release rate and the total heat release up to 75% and 22.9%, respectively, in the microscale combustion calorimeter measurement. The results manifested that Ca(H 2 PO 4 ) 2 @HCCP could endow PVA with superior flame retardancy. Moreover, char residues analysis explained the flame retardant mechanism in condensed and gas phase, which is mainly attributed to the strong catalytic char formation, free radical trapping, and gas barrier effect. Therefore, the green flame retardant has great application s prospect in fire safety.
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