MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2025
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IF 4.6
Yulin Tan,Ziye Shen,Ying Yang,Huimin Zhang,Yufang Xie,Chenglin Zhang,Yuan Liu,Mingming Chen,Dawei Cao
Heterojunction engineering significantly enhances photocatalytic CO 2 reduction performance. However, a large lattice mismatch in heterostructures hinders photocatalytic reaction by forming extensive grain boundaries, inefficient interfaces, and sluggish interfacial charge transfer. Metal halide perovskites, featuring soft lattices induced by weak ionic metal-halide bonds, offer effective solutions to alleviate such mismatches. Herein, we fabricate BaTiO 3 /CsPbBr 3 photocatalysts with a precisely engineered type-II heterojunction. Notably, the BaTiO 3 /CsPbBr 3 heterostructure achieves a CO formation rate of 17.3 μmol∙g −1 h −1 — 5.2-fold and 2.3-fold higher than pristine BaTiO 3 (3.3 μmol∙g −1 h −1 ) and CsPbBr 3 (7.6 μmol∙g −1 h −1 ), respectively. This improvement stems from the synergistic effect of enhanced light absorption and charge separation. This work provides fundamental insights for developing high-performance heterojunction photocatalysts.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
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2025
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IF 4.3
Yadong Du,Xiangtong Meng,Jun Qi,Benxiang Gong,Yangjun Ma,Jiachun Li,Hongqi Zou,Jieshan Qiu
Electrochemical CO 2 reduction (ECR) to value-added products provides a pathway to reduce CO 2 emission and to enable a closed carbon cycle. Compared to powdered catalysts, self-supporting electrocatalysts have more prominent advantages such as high charge transfer capacity and the ability to serve directly as working electrodes without the need for binders. Herein, a self-supporting catalyst featuring SnO 2 nanoparticles incorporated into porous carbon nanofiber (SnO 2 -PCNF) was crafted via electrospinning followed by annealing in CO 2 . SnO 2 -PCNF can directly function as working electrode for ECR to produce HCOOH, achieving a high Faradaic efficiency of 92.3%. Also, the SnO 2 -PCNF can stably catalyze ECR process for more than 50 h. Theoretical calculations and in-situ Raman spectroscopy elucidate the underlying ECR mechanism over SnO 2 -PCNF, wherein the catalyst significantly reduces the energy barrier of the rate-determining step. This effectively suppresses the competitive hydrogen generation. This work provides some insights into design of binder-free and high-performance ECR electrocatalysts.
研究领域:
材料科学
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环境科学
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能源化学
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高影响因子
JOURNAL OF POLYMER RESEARCH
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2025
·Vol. 32
·期 3
·1-9
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IF 2.8
Xian Wenqi,He Maoyi,Zheng Rui,Liu Zhu,Lu Ming,Chu Yuehuan,Cao Hao
CO 2 copolymer diol (PPCD) with superior transparency is an indispensable raw material for the polyurethane, especially for waterborne polyurethane coatings. However, commercial PPCD is generally opaque. In this work, A sustainable, colorless and transparent PPCD was prepared by using carbon dioxide (CO 2 ) and propylene oxide (PO) as raw materials. Research shows that the increase in CO 2 content (from 23.5 wt.% to 31.5 wt.%) will affect the transparency and thermal stability of PPCD and the transparency of PPCD with 29.1 wt.% CO 2 content is even higher than 90%, while the 5 wt.% mass loss temperature reaches 240.1 ℃. Furthermore, a series of waterborne polyurethane (WPU) was successfully synthesized by prepolymer method with PPCD as the soft segment. With the increase of CO 2 content, the thermodynamic property of WPU was significantly improved. When CO 2 content increased from 23.50 wt.% to 31.50 wt.%, the tensile strength increased from 23.27 MPa to 34.63 MPa and the elongation at break decreased from 750.85% to 520.37%, accompanied by the glass-transition temperature increased from -49.7 ℃ to -34.5 ℃. In addition, it was found that WPU prepared by transparent PPCD has better tensile strength, transparency, and storage stability. A new inspiration was provided for its application in the fields of optical components, transparent medical materials and UV curable coatings.
研究领域:
材料科学
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化学工程
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高影响因子
RSC Advances
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2024
·Vol. 14
·期 29
·21151-21157
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IF 3.9
Jianwei Yang,Xianghao Han,Xiao Feng
As an emerging category of crystalline porous materials, covalent organic frameworks (COFs) are primarily synthesized via solvothermal methods. However, achieving rapid synthesis of COFs through this approach poses a significant challenge. To address the issue of slow synthesis, we studied the crystallization process of aminal-linked COFs via the condensation of a cost-effective aldehyde and secondary amine, and successfully expedited the synthesis of COFs within a one-hour duration. Furthermore, gram-scale aminal-linked COFs with abundant ultra-microporous channels demonstrated promising potential for CO2/CH4 separation. This study enables the rapid synthesis of aminal-linked COFs from cheap raw materials, which lays a foundation for their practical applications.
研究领域:
材料科学
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化学工程
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Yanfei Wang,Tongge Li,Shihui Wang,Xiao Du,Lin Li,Hui Xiao,Zhaoyuan Zhang,Feiyang Jiang,Shifa Li,Zhenzhong Wang,Yifang Wang,Ning Yang
The excessive emission of industrial CO 2 seriously threatens the living environment of human beings. In this paper, we propose a CO 2 sensing method based on cyclic microfluidic and dynamic flow detection technology. Firstly, a microflow permeation model was established to describe the numerical relationship between CO 2 permeation flux and gas phase inlet concentration and velocity. Secondly, we designed a microfluidic chip with coupled gas–liquid circulation and optimized its channel structure. Based on this, a microflow fluorescence response sensing system was built to analyze the fluorescence response spectral characteristics under different CO 2 permeation fluxes. Then, the optimal gas flow rate selection strategy for different CO 2 concentrations was proposed, and the CO 2 dynamic sensing model was established. Finally, the reliability of the proposed detection method is verified by comparing the detection results of commercial sensors with standard gases. The results indicate that the linear correlation coefficient between the relative fluorescence intensity and CO 2 concentration of the proposed CO 2 dynamic sensing method is 0.9987, the detection error of low concentration range is 193.3 ppb, and the detection error of high concentration range is less than 193.3 ppm. Compared with the parallel flow mixing device, the gas–liquid circulation-coupled microfluidic chip designed in this paper has better gas–liquid mixing effect. The system can operate continuously in the air for 40 weeks. Compared with commercial sensors, it has the advantages of better reusability, high linearity and low detection error in the whole range.
研究领域:
环境科学
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生物医学工程
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DOI
高影响因子
RSC Advances
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2024
·Vol. 14
·期 20
·13719-13733
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IF 3.9
Qilin Han,Zhiyao Wu,Yu Zhou,Yongxin Lei,Bingying Nie,Leilei Yang,Wenbin Zhong,Nannan Wang,Yanqiu Zhu
Developing low-cost and efficient photocatalyst/co-catalyst systems that promote CO2 reduction remains a challenge. In this work, Ag–Ti3C2Tx composites were made using a self-reduction technique, and unique Ag–Ti3C2Tx/ZnO ternary heterojunction structure photocatalysts were created using an electrostatic self-assembly process. The photocatalyst's close-contact heterogeneous interface increases photogenerated carrier migration efficiency. The combination of Ti3C2Tx and Ag improves the adsorption active sites and reaction centers for ZnO, making it a key site for CO2 adsorption and activation. The best photocatalysts had CO and CH4 reduction efficiencies of 11.985 and 0.768 μmol g−1 h−1, respectively. The CO2 conversion was 3.35 times better than that of pure ZnO, which demonstrated remarkable stability even after four cycle trials with no sacrificial agent. Furthermore, in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) and valence band spectroscopy were utilized to propose the photocatalytic reaction mechanism and electron transfer channels of the Ag–Ti3C2Tx/ZnO system, confirming that CHO* and CO* are the important intermediates in the generation of CH4 and CO. This study introduces a novel method for the development of new and efficient photocatalysts and reveals that Ti3C2Tx MXene is a viable co-catalyst for applications.
研究领域:
材料科学
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环境科学
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化学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Xinyu Sun,Quanqi Zhang,Sihan Li,Yiming Zhang,Meiyu Liu,Binbin He,Yi Mei,Yun Zu
Ca-FAU zeolite sorbents have been recognized as one of promising CO 2 capture materials, while it is subject to the change in the speciations and locations of Ca 2+ species as adsorption sites in the FAU zeolite due to its susceptible migration. In this paper, a facile strategy is reported by tuning calcination temperatures and Ca loadings, to maximize the utilization of Ca 2+ species in the supercages of CaNaX zeolites. Detail characterizations of TG-MS, in situ FTIR spectroscopy and XRD Rietveld refinement reveal the changeable regular in the chemical speciations, locations and number of Ca 2+ species in the CaNaX zeolites. Synthetic 0.05CaNaX-250 zeolite (calcined at 250 °C and Ca loading of 1.58 wt%) guarantees at least 21 Ca(OH) + species (depicted as hydroxylated Ca 2+ species) in the supercages per FAU cell unit, close to theoretical value. Such sorbent apparently improves the CO 2 uptakes and the separation from CO 2 /N 2 and CO 2 /CH 4 , along with fast kinetics, low heat of adsorption, measured by dynamic and gravimetric adsorption methods, respectively. In addition, it keeps a superior recyclability after 10 times regeneration. CO 2 -dosing FTIR experiments further illustrate that excellent CO 2 adsorption performance are benefited from the formation of Ca(OH) + ∙∙∙(CO 2 ) 2 adducts with an appropriate interaction. This work is of great significance to better understand the role of cations in FAU zeolites, and also provides an important reference value for the directional design of effective adsorption sites in other excellent CO 2 zeolite sorbents.
研究领域:
材料科学
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环境科学
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Xiaoqi Jin,Zong-Qun Li,Jinlong Ge,Linlin Zhu,Caiyan Liu,Qiu Li,Jing Liu,Chenlin Yin,Gaoyu Su
Ca-based MOFs and related derived materials offer promising potential for CO2 capture. In this study, we synthesized a CaBTC MOF and polydopamine coated MOF composite by using an ultrasonic irradiation method, and a corresponding derivate was obtained by thermal treatment. The capacity of CO2 capture and subsequent adsorption performance from the resulting CaBTC MOF/MOF derivate under different temperatures were investigated in detail. The structural features and textural parameters of the obtained absorbents were assessed by XRD, SEM, EDS, FT-IR spectroscopy, Raman spectroscopy, XPS, TG-DSC, and N2 absorption/desorption characterization. The results demonstrated that the prepared of CaO/CN-x with basic functional groups exhibited micro/mesoporosity derived from organic matter removal through carbonization at 800°C. Both of these properties accounted for the highest CO2 capacity of 2.30 mmol/g at 273 K using pure CO2 for the CaO/CN-5 sample. Additionally, we found that the derivate of CaBTC MOF at high temperatures experienced two stages of chemical adsorption, as well as carbonation reaction. The high CO2 capture capacity reached 60.2 mass% in 10 min at 873 K for the CaO sample. Furthermore, the introduction of carbon components derived from organic matter in the CaBTC MOF derivate matrix promoted the conversion of CO2 to CO through the reduction reaction. Possible reaction mechanisms for the conversion of CO2 to CO were preliminary proposed based on thermodynamic calculation.
研究领域:
材料科学
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环境科学
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化学工程
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高影响因子
ENERGY & FUELS
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2024
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IF 5.2
Bo Zhang,Chunming Xu,Quan Shi,Yiqiang Li,Zheyu Liu,Jianxun Wu
Supercritical CO2 flooding is an efficient method of enhanced oil recovery in which CO2 injection can selectively extract light components and cause the deposition of residue heavy components in reservoir pores. Residues can change the wettability of the rock surface to ultimately reduce crude oil production. In this study, supercritical CO2 extraction experiments were conducted under identical operation conditions using various minerals, including quartz, montmorillonite, Illite, dolomite, albite, calcite, and chlorite. The crude oil, extracts, and residues were comprehensively characterized using high-temperature gas chromatography and high-resolution mass spectrometry. The results indicate that the extraction effect is influenced by the specific surface areas and adsorption strengths of various minerals. The larger the specific surface area, the more readily the heteroatoms in the resins can be adsorbed onto the rock surface. Quartz exhibits weak adsorption strength toward heteroatoms, whereas minerals with high specific surface areas demonstrate significantly higher adsorption strengths compared to those with lower specific surface areas. The wettability changes of various mineral surfaces were also assessed through contact angle measurements. Upon exposure to crude oil, a rock surface undergoes a transition from being water-wet to becoming oil-wet. Subsequently, it reverts back to being more water-wet due to supercritical CO2 extraction which further proves the feasibility of alleviating channeling by injecting water. Furthermore, the alteration in wettability caused by the change in the carbon number of different heteroatoms under supercritical CO2 extraction is also investigated. This study provides a basis for the mechanism study of CO2–crude oil–rock interaction and a comprehensive understanding of the wettability alteration of different reservoirs in carbon dioxide flooding.
研究领域:
石油工程
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化学工程
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DOI
高影响因子
ENERGY
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2024
·
IF 9
Fanli Meng,Kun Fu,Xueli Wang,Bonan Ye,Pan Zhang,Lemeng Wang,Dong Fu
Previous work has shown that non-aqueous absorbent composed of dimethyl sulfoxide (DMSO) and 2-ethylhexylan-1-amine (EHA) is superior to commercial monoethanolamine (MEA) in both absorption of CO 2 and desorption. However, the price of DMSO is too high, which leads to the high cost of reagents. It is worthwhile to choose a cheap solvent instead of DMSO, which can also achieve satisfactory absorption and desorption performance. Around this goal, we selected diethylene glycol diethyl ether (DEGDEE) to form a non-aqueous absorbent with EHA and investigated the absorption and desorption performance. The desorption efficiency of 70 wt% EHA +30 wt% DEGDEE was 99 % at 373 K. The desorption efficiency was 89.4 %, and the desorption energy consumption was only 45.1 % of MEA when the water content was 10 wt%. DEGDEE can achieve similar or even better performance than DMSO, while the cost of DEGDEE (12000–31000 RMB/ton, technical grade purity 99 %) is lower than DMSO (40000–48000 RMB/ton, technical grade purity 99 %). In addition, it also has a good recycling capacity. These advantages will certainly endow this newly developed absorbent with great application prospects in the field of CO 2 capture.
研究领域:
化学工程
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环境科学
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材料科学
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DOI
高影响因子
Surfaces and Interfaces
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2025
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IF 6.3
Chaoqiang Li,Xiangyu Xu,Aizhong Jia
Photocatalytic reduction of CO 2 to chemical fuels is a promising strategy to alleviate the greenhouse effect and energy crisis. This article successfully fabricated Ag/CdS composites with ohmic junction using a two-step method and further verified them by DFT calculations. Meanwhile, photoelectrochemical and electron paramagnetic resonance tests show that Ag/CdS has higher photocurrent density and lower charge transfer resistance, suggesting that the ohmic junction achieves ultrafast electron transfer from CdS to Ag under light irradiation, significantly promoting the separation of photogenerated carriers. Furthermore, the localized plasmon resonance (LSPR) of Ag enhances the light absorption of the catalyst and generates a large number of hot electrons for the photocatalytic reduction reaction. The synergistic effect of ohmic junction and LSPR gives high electron density at the reaction site, which promotes the multiple proton-coupled electron reactions leading to highly selective photoconversion of CO 2 to CH 4 . Under the optimized conditions, the CH 4 yield of the synthesized Ag/CdS is 68.6 μmol·g −1 ·h −1 , which is 25.4 times higher than that of bare CdS, and the CH 4 selectivity increases from 53.8% to 90.1%. This study provides a new idea for the design of CdS-based materials for highly selective reduction of CO 2 to CH 4 .
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
RARE METALS
·
2025
·
IF 11
Wang Dan-Dan,Xu Meng-Yang,Lin Zhao-Xin,Wu Jia-Hui,Yang Wei-Ting,Li Hong-Ji,Su Zhong-Min
The goal of photocatalytic CO 2 reduction is to obtain a single energy-bearing product with high efficiency and stability. Consequently, constructing highly selective photocatalysts with enhanced surface and optoelectronic properties is crucial for achieving this objective. Here, we have developed a simple one-pot vulcanization method to synthesize a MIL-68(In)-derived CdIn 2 S 4 /In 2 S 3 heterojunction that exhibited stable and high selectivity. Multiple characterizations of the CdIn 2 S 4 /In 2 S 3 heterojunction revealed a hierarchical tubular structure with numerous surface reactive sites, a high visible-light utilization rate ( λ < 600 nm), efficient charge separation, and a prolonged charge-carrier lifetime. Moreover, an S-scheme charge transfer mechanism, based on the interleaved band between the two components, improved the reduction capability of the electrons. Benefiting from the compositional and structural synergy, the yield CO by CdIn 2 S 4 /In 2 S 3 -250 (CI-250) reached 135.62 μmol·g −1 ·h −1 , which was 49.32 times and 32.88 times higher than that of In 2 S 3 and CdIn 2 S 4 , respectively. The CdIn 2 S 4 /In 2 S 3 heterojunction exhibited a quantum efficiency of 4.23% with a CO selectivity of 71%. Four cycle tests confirmed the good stability and recyclability of the CI-250. This work provides a new approach for designing and preparing high-performance hollow MOFs-based photocatalysts for scalable and sustainable CO 2 reduction.
研究领域:
材料科学
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环境科学
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化学工程
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高影响因子
危险品化学品经营许可证（带存储）