SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Iwei Wang,Hailiang Nie,Yongliang Yan,Manyi Cai,Hui Zhou,Yongqing Xu,Yi Xing,Hongzhi Ma
Reconstructing dual functional materials (DFMs) from industrial waste such as steel slag offers a sustainable approach to mitigate environmental pollution while valorizing hazardous byproducts. Although the steel slag is rich in calcium and iron, its direct use is hindered by the formation of inactive solid solutions (e.g., Ca 2 Fe 2 O 5 , Ca 2 SiO 4 ), limiting CO 2 capture and conversion performance. In this study, we reconstruct steel slag into a high-performance DFM composed of CaO (adsorptive phase) and FeOx (catalytic phase) for integrated CO 2 capture and utilization (ICCU). The optimized DFM achieves a CO 2 uptake of 9.15 mmol g −1 , a CO yield of 7.80 mmol g −1 , 87 % CO 2 conversion, and 100 % CO selectivity at 650 °C, substantially outperforming the raw slag. Moreover, the DFM maintains outstanding cyclic stability over 10 cycles, with CO 2 uptake ranging from 8.25 to 10.38 mmol g −1 and CO yield from 6.90 to 8.25 mmol g −1 . In-situ XRD and DRIFTS analyses reveal a dual Fe-phase looping mechanism (Fe/FeO and Fe/Ca 2 Fe 2 O 5 ), and a formate-mediated hydrogenation pathway during in-situ CO 2 conversion. This work highlights the untapped potential of industrial waste for developing efficient, sustainable materials for integrated CO 2 capture and utilization.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2018
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IF 3.235
Xiaoyu Zhao,Jianhua Ding,Wenlong Bai,Yanfei Wang,Yujia Yan,Yan Cheng,Juankun Zhang
A PEDOT:PSS/AuNPs/CA modified screen-printed carbon based disposable electrochemical sensor for sensitive and selective determination of carmine was studied. Enhanced electrode conductivity was achieved via a 3-step process: (i) construction of a conductive polymer (PEDOT: PSS) on a disposable screen-printed carbon electrode (SPCE) (ii) electropolymerization with gold nanoparticles (AuNPs) and (iii) modification with positively charged β-mercaptoethylamine (CA) in acidic solution using an Au S bond. The prepared nanomaterials were characterized by scanning electron microscopy (SEM) and energy dispersive X-ray spectrum analysis (EDX). The properties of the resulting sensor were examined by cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS). Experimental parameters associated with optimal detection conditions such as modes of electrode modification, ratio of PEDOT:PSS, pH of electrolyte, number of turns used for AuNPs polymerization, and CA concentrations were evaluated. The data revealed that the prepared sensor had a low detection limit (6.05 × 10 −9 mol/L) and could achieve linearity over a wide range of concentration (9.0 × 10 −9 to 3.9 × 10 −6 mol/L), thereby meeting the requirements for analysis of trace carmine. The reliability of our technique for practical applications was demonstrated by analyzing carmine in spiked beverages.
研究领域:
电分析化学
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纳米材料科学
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食品安全监测
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传感器与生物传感器
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环境分析化学
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JOURNAL OF MATERIALS SCIENCE
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2023
·Vol. 58
·期 15
·6743-6756
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IF 4.5
Zhou Huan,Wang Jie,Yang Bing,Sun Manna,Liang Chunyong,Yang Lei,Zhao Xiaoyan,Wang Hongshui
In this work, near-infrared light responsive upconversion nanoparticles TiO 2 /(Ca,Y)F 2 :Tm,Yb were hydrothermally prepared for tumor control. Moreover, femtosecond laser was adopted to reduce particle size and aggregation of TiO 2 /(Ca,Y)F 2 :Tm,Yb, as a strategy to enhance its dispersity. In vitro studies of the biocompatibility and tumor control efficacy of TiO 2 /(Ca,Y)F 2 :Tm,Yb were carried out via co-culturing human pancreatic carcinoma cells (CFPAC-1). It was found in the absence of near-infrared light, TiO 2 /(Ca,Y)F 2 :Tm,Yb showed no toxicity to CFPAC-1 cells. On contrast, when exposed to near-infrared light, particles exhibited irradiation time, irradiation interval and particle concentration dependent suppression of CFPAC-1 cells proliferation along with portion of S phase cells increase. A nude mouse model with CFPAC-1 cells injection was established and TiO 2 /(Ca,Y)F 2 :Tm,Yb was subsequently applied for in vivo tumor control. A 15 days tracking confirmed the antitumor capability of near-infrared light excited TiO 2 /(Ca,Y)F 2 :Tm,Yb. Overall, we anticipate that the here-introduced TiO 2 /(Ca,Y)F 2 :Tm,Yb can serve as an effective agent for photodynamic antitumor therapy. Graphical Abstract
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Materials Today Communications
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2022
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IF 3.662
Yanfei Jia,Jianwen Wei,Yuan Yuan,Xiaobin zhou,Linlin Geng,Lei Liao
Using KIT-6 as the silica source, a series of Li 4 SiO 4 adsorbents (KIT-6-Li 4 SiO 4 ) were synthesized by impregnation precipitation method for high temperature CO 2 capture. Then, the KIT-6-Li 4 SiO 4 -800–4 (KL-800–4) material, was selected to analyze the improvement of the adsorption performance by Ca 2+ /Na + eutectic doping modification. These adsorbents were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and low temperature N 2 adsorption/desorption, and the CO 2 adsorption capacity of them was explored. At 600 °C and under 15 vol% CO 2 , KL-Ca0.03 and KL-Na0.06 sorbents resulted in a CO 2 uptake of 29.17 wt% and 35.35 wt% (close to the theoretical maximum), respectively，which are much higher than that of KL-800–4 (14.73 wt%). After 10 adsorption/desorption cycles, the adsorption capacity of KL-Na0.06 increased by 1.35 wt%. We found that KL-Na0.06 has more advantages compared with traditional lithium orthosilicate and undoped adsorbents, including lower energy consumption, higher CO 2 adsorption capacity and better cycling ability. Finally, the double exponential model had a high degree of fit for the adsorption of CO 2 by Li 4 SiO 4 .
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Jianjie Chen,Yuming Tu,Gaoyan Shao,Fan Zhang,Zhiyong Zhou,Shichao Tian,Zhongqi Ren
A novel Calcium-loaded catalyst (Ca-C/Al 2 O 3 ) was prepared with a facile impregnation method, using polyethyleneimine (PEI)-polydopamine (PDA) as a coating agent and Al 2 O 3 as supporter. The prepared Ca-C/Al 2 O 3 catalyst showed a higher treatment performance for high salt organic wastewater, and removal rate of chemical oxygen demand (COD) was enhanced from 32.5% to 64.4% comparing with single ozonation. Besides, it also showed a good catalytic performance comparing with other catalysts reported in different literature. Catechol groups and reactive amine groups in the PEI-PDA coating worked as anchoring points for metal ions, facilitating the formation of dispersed calcium sites (Ca-O and Ca-N). Calcium sites and different types of nitrogen (graphite nitrogen, pyrrolic nitrogen, and pyridinic nitrogen) were identified as the active sites for the catalytic reaction. The analysis of electron paramagnetic resonance (EPR) and radical quenching tests revealed that hydroxyl radical (•OH) and singlet oxygen ( 1 O 2 ) were the reactive oxygen species (ROS) for treatment of high salt organic wastewater. According to the above results, the prepared Ca-C/Al 2 O 3 catalysts showed a good catalytic permanence and used for advanced treatment of high salt organic wastewater.
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Inorganic Chemistry Frontiers
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2022
·Vol. 9
·期 20
·5188-5194
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IF 7.779
Zhi Fang,Chun-Li Hu,Wen-Tong Chen,Jiang-Gao Mao
Exploration of short-wave ultraviolet beryllium-free Sr2Be2B2O7-type borates is of great significance to the development of short-wave ultraviolet lasers. As a structural analogy to BeO4, the ZnO4 unit has been demonstrated as a facile building unit for the design of beryllium-free borates with balanced overall performance. Nevertheless, despite the discovery of numerous zincoborates, no Sr2Be2B2O7-type zincoborates with characteristic bilayer structures constituted by ZnO4 and BO3 units have been found, highlighting the great challenge in the design and syntheses of Sr2Be2B2O7-type zincoborates. Herein, two new beryllium-free Sr2Be2B2O7-type zincoborates, namely, Na3AEZn2B3O9 (AE = Mg and Ca), were rationally obtained by a chemical cosubstitution design strategy. With the cosubstitution of Sr2+, Be2+ and out-of-plane bridging O2− of {Sr[Be2(BO3)2O]}∞2− bilayers of Sr2Be2B2O7, Na3AEZn2B3O9 (AE = Mg and Ca) featuring a new Sr2Be2B2O7-type bilayer structure of {Na3[Zn2(BO3)2(BO3)]}∞2− were successfully isolated, indicating the feasibility of chemical cosubstitution for the design of Sr2Be2B2O7-type zincoborates. In particular, Na3CaZn2B3O9 exhibits a wide band gap of 4.43 eV, a moderate birefringence of 0.045@1064 nm and a high melting point of 843 °C, being favorable to practical applications.
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APPLIED ENERGY
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2022
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IF 11.446
Xianyao Yan,Yingjie Li,Chaoying Sun,Chunxiao Zhang,Liguo Yang,Xiaoxu Fan,Leizhe Chu
The sorption-enhanced steam gasification of biomass (SESGB) using CaO-based materials is considered as a promising method for H 2 production. Ca-Al-Ce material has been reported as a good bi-functional material in SESGB process. Red mud is a solid waste in aluminium industry with large yield, which is rich in Fe 2 O 3 . In this work, a red mud-doped Ca-Al-Ce bi-functional material was prepared by wet-mechanical mixing method for H 2 production from SESGB. The CO 2 capture, H 2 production, and tar reduction performances during SESGB process using the red mud-doped Ca-Al-Ce bi-functional material were studied. The results show that the optimum addition amount of red mud in the bi-functional material is 5 wt%. After 20 SESGB cycles, the H 2 concentration using the red mud-doped Ca-Al-Ce material achieves 65.1 vol%, which is 82.4% higher than that using Ca-Al-Ce material. Besides, with the addition of red mud in the bi-functional material, the tar, residue char yields and CO 2 concentration decrease by 25.2%, 8.6% and 52.2%, respectively. Fe 2 O 3 in the red mud reacts with CaO to form Ca 2 Fe 2 O 5 in the 1st cycle, and Ca 2 Fe 2 O 5 is stable during 20 cycles, which is beneficial for the generation of oxygen vacancy. The oxidation states of Fe species in the material increase with the number of SESGB cycles, thus the catalytic effects on water gas shift reaction and tar reduction are promoted. The red mud addition is the key factor that results in high H 2 production, CO 2 capture and tar reduction performances, so the red mud-doped Ca-Al-Ce material appears promising for SESGB.
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Water
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2023
·Vol. 15
·期 17
·3087
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IF 3.4
Cancan Xu,Rui Liu,Qi Tang,Yifan Hou,Lvjun Chen,Quanxi Wang
In recent years, in order to improve the rural living environment, rural domestic sewage treatment has received more and more attention in China. However, the standard compliance rate of total phosphorus (TP) in rural domestic sewage after treatment is very low, and TP has become the main pollutant that prevents rural domestic sewage treatment facilities from meeting water pollutants discharge standards. In this study, to prepare calcium-modified biochar composites (E-BC) by one-step pyrolysis, waste eggshell (E) was employed as a calcium source and waste pine sawdust (BC) was employed as a carbon source. The E-BC composites produced were effective in adsorbing phosphate (P) from aqueous solutions in a broad pH range of 3–11, with good adsorption selectivity. E-BC’s adsorption capacity for P increased as the pyrolysis temperature increased from 700 °C to 900 °C, which was attributed to the higher specific surface area and calcium oxide content at higher pyrolysis temperatures. The E-BC sample, which was made from eggshell (filtered through 100 mesh sieves) and pine sawdust (filtered through 100 mesh sieves) with a mass ratio of 2:1 and a pyrolysis temperature of 900 °C, had a maximum adsorption capacity of 301 mg/g. The Langmuir model and pseudo second-order model were the best at describing the adsorption process, and the predominant sorption mechanism for P is the chemisorption reaction of calcium oxide or calcium hydroxide with phosphate to create hydroxyapatite. E-BC can effectively remove P from rural domestic sewage. The total phosphorus (TP) removal rate in rural domestic sewage ranges from 95.3 to 99.5%. After adsorption treatment, the discharge of TP in rural sewage meets the second-grade (TP < 3 mg/L) or even the first-grade (TP < 2 mg/L). This study provides an experimental basis for efficient P removal using E-BC adsorbent materials and suggests possible applications in rural domestic sewage.
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Environmental Technology & Innovation
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2023
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IF 7.1
Tengfei Wu,Junjie Lei,Liyun Lin,Qing Wang,Taimoor Hassan Farooq,Guangjun Wang,Jun Wang,Wende Yan
Developing high-efficient and easy-to-recover adsorbents for the removal of toxic metals in water is imperative, although it poses a huge challenge. In this study, a sulfur-functionalized metal-organic framework was incorporated into Ca-alginate/polyacrylic acid granulates as an effective adsorbent ( abbr. CPZ-SH) for Cu 2+ and Cd 2+ removal. The physicochemical properties of the obtained CPZ-SH were determined by the integrated characterization techniques (e.g., FTIR, XRD, and SEM). The environmental effects of solution pH, typical background cations (K + , Na + , Mg 2+ , and Ca 2+ ), and dissolved organic matter were assessed to determine the adsorption behaviors of the granulates. Time-dependent adsorption kinetics suggested that the adsorption process was dominated by an intraparticle diffusion procedure. CPZ-SH exhibited maximum adsorption capacities of 75.8 and 48.4 mg g –1 at 30 ℃, and excellent adsorption reusability with Cu 2+ and Cd 2+ adsorption efficiencies over 96.0% and 85.1% after 10 cycles, respectively. The extended X-ray absorption fine structure (EXAFS) demonstrated that the functional groups (thiol, carboxyl, and hydroxyl) played a crucial role in adsorption processes. The findings provided an effective strategy to construct nanostructured metal-organic frameworks (MOFs) into granulates as recyclable adsorbents and enable heavy metal removal from water.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Ying Zhang,Jun Li,Fan Zhang,Xiao Li,Baige Yuan,Manman Xia,Peng Zhao,Ruyan Lei
Doping elements play an important role in improving the conductivity of Li 4 Ti 5 O 12 used as anode materials for lithium ion batteries . In this work, nanoparticles of Li 4-X Ca x Ti 5 O 12 (x = 0, 0.03, 0.05 and 0.07) were successfully synthesized through a facile hydrothermal method followed by calcination . The evolution in microstructure as well as electrochemical performance of the modified samples with the doped Ca content were investigated in details. It was found that modified Li 4-x Ca x Ti 5 O 12 (x = 0.05) exhibited the best electrochemical performances in terms of the highest initial specific discharge capacity (158.55 mA h g −1 at 160 mA g -1 ), best cycling stability with a retained specific charge capacity of 104.76 mAh g −1 at 160 mA g -1 after 100 cycles and rating capability with a retained rate of 64.55 %/88.56 % with the current density drastically increased 1600 mA⋅ g −1 and dropped to initial value. The excessive introduction of Ca (x = 0.07) caused the sharp decrease in electrochemical performance due to the formation of inert and insulating CaCO 3 . Li 4-x Ca x Ti 5 O 12 (x = 0.05) also demonstrated a lowest ohmic resistance (2.35 Ω) and charge transfer resistance (95.42 Ω).
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JOURNAL OF POLYMER RESEARCH
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2020
·Vol. 27
·期 5
·1-11
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IF 2.426
Pan Zheng,Lv Yukai,Chen Yulong,Qian Xin
Waterproofing layers play a pivotal role in tunnel engineering and building basements. Magnesium acrylate (CA-Mg 2 ) shot-membrane waterproofing materials- commonly used as a waterproof layer- is a type of hydrogel. Poly(vinyl alcohol) (PVA) solution subjected to freezing/thawing treatment has been added to a CA-Mg 2 monomer, resulting in the formation of a CA-Mg 2 /PVA interpenetrating polymer network (IPN) hydrogel which can produced by a redox initiation system. This new IPN hydrogel contains not only a CA-Mg 2 network formed with Mg 2+ coordination bonds, but also a PVA network created by hydrogen bonding between hydroxyl groups. In comparison to CA-Mg 2 hydrogels, the fracture stress of the CA-Mg 2 /PVA hydrogel increased from 0.45 MPa to 0.72 MPa, elongation from 602% to 854%, and the self-healing efficiency of the IPN hydrogel reached 99.9% over 3 h. A new shot-membrane waterproofing materials based on the CA-Mg 2 /PVA hydrogel was prepared and its fracture stress was 1.44 MPa, and self-healing efficiency 80%, at 3 h. In addition, damage to the hydrogel could be repaired repeatedly.
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Journal of the Taiwan Institute of Chemical Engineers
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2020
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IF 4.794
Xiaowei Fang,Ze Wang,Wenli Song,Songgeng Li
In this paper the aldol condensation of furfural (C5) with acetone (C3) over Ca/ZSM-5 was studied with lower dosages of water and acetone as compared to previous studies. It was observed that the formation of CaO over the catalyst is critical to catalyst activity and that the reaction may not occur without water. Although higher quantity of water was favorable for the formation of 4-(2-Furyl)-3-buten-2-one (C8), it was inhibitive for the formation of 1,5-bis-(2-furanyl)-1,4-pentadien-3-one (C13). Highest yields of C8 (38.4 mol%) and C13 (60.2 mol%) were obtained with C3-to-C5 mole ratio of 0.8:1, and water content of 29.7 wt%. The deactivated catalyst was further regenerated by re-loading CaO. An intrinsic kinetic model was established whereby the reaction was first-order dependent on the concentration of each reactant. The formation of 4-(2-furyl)-4‑hydroxy‑butan-2-one (C8-OH), and the C8-OH-to-C8 dehydration were essential steps. The reaction of C8-OH with C5 owned the highest activation energy (41.9 kJ/mol), this step was more sensitive to reaction temperature than those of other steps.
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