JOURNAL OF MATERIALS IN CIVIL ENGINEERING
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2023
·Vol. 35
·期 7
·04023184
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IF 3.2
Lei Wang,Yue Gu,Linhua Jiang,Weizhun Jin,Mingzhi Guo,Kailun Xia,Guohui Yang
Carbon capture utilization and storage technique (CCUS) is an effective way to mitigate climate change. Carbon dioxide (CO2) sequestration binders (CSB) composed of hydrated lime (CH) and cement has great application prospects in CCUS. Although CH in CSB can improve the carbon absorption capacity, it causes a significant decrease in flexural strength. This study focused on the effect of polyvinyl alcohol (PVA) on the CO2 absorption capacity and flexural strength of CSB. The results show that PVA is beneficial to enhancing the flexural strength of CSB either under natural carbonation or accelerated carbonation. This enhancement is more pronounced at an early age for CSB with high CH content. Furthermore, CO2 uptake experiments show that the PVA would not reduce the CO2 absorption of CSB and even has a slight improvement effect. Finally, thermodynamic modeling and price calculation were adopted for CSB to illustrate the chemical phase and economic cost changes. The outcomes of this study shed new light on PVA to optimize CSB.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chunxin Xu,Yi Wang,Wanjun Li,Dunfeng Gao,Guoxiong Wang,Rui Cai
Renewable energy-driven electrocatalytic CO2 reduction reaction (CO2RR) over bismuth-based catalysts shows great promise for converting CO2 into formic acid and formate while closing the carbon cycle. Herein, we report a high-performance BiFeO3/Bi25FeO40 precatalyst, which delivers a formate partial current density of 359.8 mA cm–2 and a formate formation rate of 6.71 mmol h–1 cm–2 in a flow cell at −0.75 V versus reversible hydrogen electrode (vs RHE). Furthermore, it shows stable formate production for 88 h at −0.64 V vs RHE with a total current density of 160 mA cm–2. The impressive electrocatalytic performance toward CO2RR to formate is likely ascribed to the synergistic effect of single Bi atoms and bimetallic BiFe nanoparticles present in close proximity after in situ electrochemical reconstruction of the BiFeO3/Bi25FeO40 precatalyst. This work presents new insights into the development of highly efficient Bi-based catalysts for the CO2RR.
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CATALYSIS LETTERS
·
2025
·Vol. 155
·期 6
·1-13
·
IF 2.4
Cai Yao,Wang Qi,Wang Dingran,Zhang Tianfu,Fan Ting,Fu Di,Lu Yanghui,Sun Gonggang,Li Xinbao,Wang Kaige
Achieving carbon neutrality through CO 2 hydrogenation is critical for sustainable energy and chemical industries, where methanol production remains a key target. Despite existing catalysts, challenges persist in low CO 2 conversion, poor methanol selectivity, and activity instability. This study introduces a novel ternary Cu/Zn/Y catalyst synthesized via co-precipitation to address these limitations. Tested under 5 MPa, 250 °C, H 2 /CO 2 = 3:1, and 12,000 h⁻¹, the catalyst achieved a CO 2 conversion rate of 16.6% and a methanol selectivity of 56.6%, outperforming the CuZnAl benchmark with a 14.3% higher methanol space-time yield (402.3 mg/(gcat·h)). Optimal yttrium doping enhanced methanol selectivity by 20%, attributed to improved copper dispersion. However, excess Y occupancy disrupted Cu–Zn interactions, reducing CO 2 conversion and stability, highlighting critical trade-offs. These insight underscore the potential of Cu/Zn/Y catalysts for carbon-neutral technologies and emphasize the need for optimized Y doping to balance selectivity and stability. Graphical
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JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2025
·
IF 3
Suwanan Thammarong,Xiaogang Yu,Peinan Yin,Renpeng Yang,Wei Zhang
Cobalt-zinc-manganese ferrite nanoparticles with the composition CoxZn 0.8-x Mn 0.2 Fe 2 O 4 (0 ≤ x ≤ 0.5) were prepared by the co-precipitation method. The elemental composition, crystal structure, particle size, and magnetic properties were investigated using ICP, XRD, FTIR, TEM, and VSM techniques. The synthesized nanoparticles were subjected to magnetic induction heating measurements to evaluate potential for magnetic induction hyperthermia. The temperature of the Co 0.2 Zn 0.6 Mn 0.2 Fe 2 O 4 nanoparticle suspension stabilized at 42.9 °C under the applied alternating magnetic field. The cytotoxicity essay analyses indicate the good biocompatibility of the nanoparticles, exhibiting a good candidate for conventional hyperthermia.
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Energy Material Advances
·
2025
·
IF 15.9
Xueke Wang,Yixuan Li,Jessica Nginyo,Daniela Iracelma Difuma Luis,Dong Cao,Zhiyong Deng,Weijie Cai
Reducing the greenhouse gas CO2 in the atmosphere and converting it into high-value-added syngas is regarded as a competitive strategy in line with green and sustainable development. Herein, a series of M/TiO2 (M = Cu, Co, Ni) catalysts were developed for photothermal CO2 reduction with bioethanol, and the synergistic mechanism between photocatalysis and thermocatalysis was deeply investigated. Systematic characteristics and photothermal ethanol dry reforming (EDR) testing results revealed the relevancy between catalytic behavior and microstructure properties of TiO2-supported catalysts. Notably, the Ni/TiO2 catalyst displayed superior catalytic behavior than Cu/TiO2 and Co/TiO2 counterparts, which mainly attributed to their abundant oxygen vacancies and stronger Ni–TiO2 interaction. In addition, both the narrower band gap and higher light absorption ability directly promoted the Ni/TiO2 catalyst possessing outstanding ethanol conversion (94.5%) and controllable H2/CO ratio (0.65) at 450 °C. Furthermore, the relatively less activation energy also determined that the Ni/TiO2 sample possessed the fastest kinetic progression in the EDR process. Therefore, the Ni/TiO2 catalyst exhibited the better photothermal catalytic activity compared with other 2 samples. We anticipate that photothermal synergy would offer good technical guidance to promote the conversion and utilization of greenhouse gas CO2 under relatively low temperature environment.
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LANGMUIR
·
2019
·
IF 3.683
Xiaojiang Li,Baogang Wang,Shanshan Dai,Hongsheng Lu,Zhiyu Huang
CO2-responsive microemulsions based on ionic liquid 1,1,3,3-tetramethylguanidine-oleic acid (TMG-OA) have been designed to provide an approach for reducing the volatilization of amine in amine-containing microemulsions effectively and exhibit reversible transitions of microstructures. The ionic liquid TMG-OA was prepared by the direct neutralization of oleic acid (HOA) and 1,1,3,3-tetramethylguanidine (TMG, one of volatile and toxic amines). From the investigations of nuclear magnetic resonance hydrogen spectrum, pH, thermogravimetry, and automatic interface tension meter, the excellent properties of switchability, stability, and surface activity of TMG-OA were demonstrated, and then the ionic liquid-based microemulsions with CO2 response were prepared with TMG-OA (surfactant), HOA (oil phase), isopropyl alcohol (IPA, cosurfactant), and water. Interestingly, for microemulsions with a higher IPA content (47.42, 44.48 wt %), sizes of microemulsions are increased upon introducing CO2 and decreased upon addition of N2/65 °C. In addition, for microemulsions with a lower IPA content (26.22 wt %), the new microemulsions with different sizes are regenerated after the phase separation of emulsions generated by introducing CO2, and incomplete recovery of microemulsions can be observed upon addition of N2/65 °C. The reversible microstructures are induced by the swelling behavior and the reduced single phase area, which are caused by the reversible conversion between TMG-OA and HOA components.
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Frontiers in Chemistry
·
2020
·
IF 3.693
Lai Nanjun,Zhu Qingru,Qiao Dongyu,Chen Ke,Tang Lei,Wang Dongdong,He Wei,Chen Yuemei,Yu Tong
To improve CO2 adsorption performance of nanoparticle absorbents, a novel tertiary amine functionalized nano–SiO2 (NS–NR2) was synthesized based on the 3–aminopropyltrimethoxysilane (KH540) modified nano–SiO2 (NS–NH2) via methylation. The chemical structure and performances of the NS–NR2 were characterized through a series of experiments, which revealed that NS–NR2 can react with CO2 in water and nanofluid with low viscosity revealed better CO2 capture. The CO2 capture mechanism of NS–NR2 was studied by kinetic models. From the correlation coefficient, the pseudo second order model was found to fit well with the experiment data. The influencing factors were investigated, including temperature, dispersants, and cycling numbers. Results has shown the additional surfactant to greatly promote the CO2 adsorption performance of NS–NR2 because of the better dispersity of nanoparticles. This work proved that NS–NR2 yields low viscosity, high capacity for CO2 capture, and good regenerability in water. NS–NR2 with high CO2 capture will play a role in storing CO2 to enhanced oil recovery in CO2 flooding.
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RSC Advances
·
2015
·Vol. 6
·期 3
·2252-2258
·
IF 3.84
Yun Qin,Jianfei Lv,Xin Fu,Ruili Guo,Xueqin Li,Jianshu Zhang,Zhong Wei
Three types of amino acid salts (sodium lysine, sodium arginine, sodium histidine) were introduced into SPEEK polymer matrix to fabricate a series of SPEEK/amino acid salt membranes for CO2 separation. The membranes could efficiently separate CO2 from a CO2/CH4 mixture due to the simultaneous improvement of CO2 permeability and separation performance. Firstly, the amino acid salt contained a larger number of amino groups (–NH2), which could reversibly react with CO2, improving the CO2 molecules transfer performance. Secondly, the ether oxygen structure (–O–) in the polymer chain and the carboxyl groups (–COO−) in the amino acid salt had an excellent affinity for CO2, enhancing the solubility selectivity. Thirdly, the introduction of amino acid salt increased the water uptake, and water was favored over CO2 dissolution; this was also good for the increase of solubility selectivity. Among the three types of amino acid salts, the membrane doped with 20 wt% sodium lysine (SPEEK/LLS-20) showed the highest CO2 permeability of 295.6 barrer and CO2/CH4 selectivity of 71.8 at 2 bar and room temperature, surpassing the 2008 Robeson upper bound line.
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ADSORPTION SCIENCE & TECHNOLOGY
·
2013
·
IF 0.559
Jiaodi Tang,Yaping Zhou,Wei Su,Xiuwu Liu,Yan Sun
Zeolite SSZ-13 was synthesized by a traditional hydrothermal method, and characterized by powder X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The porous structure of the samples was determined from nitrogen uptake measurements at 77 K, and the surface properties were analyzed by Fourier transform infrared spectroscopy. The zeolite SSZ-13 had a type I isotherm with a uniform pore-size distribution and most pores were less than 1 nm. The Langmuir surface area was 703 m2/g. The adsorption of various gases on SSZ-13 was studied experimentally and a high selectivity for CO2 over N2 was achieved.
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ChemSusChem
·
2019
·Vol. 12
·期 12
·2740-2747
·
IF 7.804
Xiaoli Jin,Chade Lv,Xin Zhou,Liqun Ye,Haiquan Xie,Yue Liu,Huan Su,Biao Zhang,Gang Chen
Graphical Triple boost ! The high abundance of oxygen vacancies in Bi 24 O 31 Cl 10 play the following three roles for fully optimizing the CO 2 conversion efficiency: (i) enhance charge density, (ii) improve separation of electron–hole pairs, and (iii) lower energy for the formation of intermediates during the process. Unearthing an ideal model to describe the role of defect sites for boosting photocatalytic CO 2 reduction is rational and necessary, but it still remains a significant challenge. Herein, oxygen vacancies are introduced on the surface of Bi 24 O 31 Cl 10 photocatalyst (Bi 24 O 31 Cl 10 -OV) for fine-tuning the photocatalytic efficiency. The formation of oxygen vacancies leads to a new donor level near the conduction band minimum, which enables a faster charge transfer and higher carrier density. Moreover, oxygen vacancies can considerably reduce the energy for the formation of COOH* intermediates during CO 2 conversion. As a result, the activity of Bi 24 O 31 Cl 10 -OV for selective photoreduction of CO 2 to CO is significantly improved, with a CO generation rate of 0.9 μmol h −1 g −1 , which is nearly 4 times higher than that of pristine Bi 24 O 31 Cl 10 . This study reinforces our understanding of defect engineering in Bi-based photocatalysts and underscores the potential importance of implanting oxygen vacancies as an effective strategy for solar energy conversion.
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ACS Applied Nano Materials
·
2020
·
IF 0
Siyu Kuang,Minglu Li,Rong Xia,Lei Xing,Yaqiong Su,Qun Fan,Jinping Liu,Emiel J.M. Hensen,Xinbin Ma,Sheng Zhang
The electrochemical carbon dioxide reduction reaction (CO2RR) is a promising solution to the current environmental and energy issues. Cu is the only metal catalyst able to convert CO2 into high-value-added hydrocarbons. However, Cu catalysts tend to degrade with the decrease in the hydrocarbon selectivity under operation conditions. Herein, we monitored the morphological evolution of Cu nanocatalysts and correlated with changes in the selectivity of hydrocarbon products during electrochemical CO2 reduction. Initial Cu nanospheres quickly reconstructed into nanocubes within 1 h of CO2 electrolysis and then gradually turned into even smaller irregular nanoparticles. Interestingly, the above unstable Cu nanocube offered the maximum ethylene selectivity. We successfully stabilized these Cu nanocubes using a 2D graphene surface doped with nitrogen to achieve high ethylene selectivity over 24 h. Our X-ray photoelectron spectroscopy (XPS) and density-functional theory (DFT) investigations show that the strong interaction between Cu and pyridinic nitrogen on the 2D graphene surface plays a key role in stabilizing Cu nanocubes.
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JOURNAL OF ELECTRONIC MATERIALS
·
2016
·Vol. 46
·期 2
·999-1004
·
IF 1.491
Huang Zhengfeng,Cheng Xudong,Dong Peimei,Zhang Xiwen
To mitigate the greenhouse effect, many studies have been carried out to improve the CO 2 conversion efficiency of TiO 2 . Modification of TiO 2 has been intensively investigated, but the influence of an electric field on photoreduction by this material remains largely unknown. Accordingly, in this study, we explored the effect of an electric field on the photoreduction process using a porous TiO 2 -Ti material. The results indicated that the CO yield improved 85-fold (equivalent to 4772 μ mol/g h) when a 30-kV voltage was applied during the reduction process. To make the electric field effect fully functional, we also explored the effect of water on the photoreduction process, finding that TiO 2 showed the highest conversion rate when the humidity was controlled at 50% relative humidity (RH).
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