ACS Omega
·
2023
·
IF 4.1
Shunyang Yao,Zhi Li,Zhen Liu,Xiaodong Geng,Li Dai,Yanmei Wang
Porosity is the key factor in determining the CO2 capture capacity for porous carbon-based adsorbents, especially narrow micropores of less than 1.0 nm. Unfortunately, this desired feature is still a great challenge to tailor micropores by an effective, low-corrosion, and environmentally friendly activating agent. Herein, we reported a suitable dynamic porogen of CuCl2 to engineer microporous carbons rich in narrow micropores of <1.0 nm for solving the above problem. The porosity can be easily tuned by varying the concentration of the CuCl2 porogen. The resultant porous carbons exhibited a multiscale micropore size, high micropore volume, and suitable surface nitrogen doping content, especially high-proportioned ultromicropores of <0.7 nm. As adsorbents for capturing CO2, the obtained microporous carbons possess satisfactory CO2 uptake, moderate heat of CO2 adsorption, reasonable CO2/N2 selectivity, and easy regeneration. Our work proposes an alternative way to design porous carbon-based adsorbents for efficiently capturing CO2 from the postcombustion flue gases. More importantly, this work opens up an almost-zero cost and industrially friendly route to convert biowaste into high-added-value adsorbents for CO2 capture in an industrial practical application.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry Letters
·
2023
·
IF 5.7
Huiling Tang,Shuang Xu,Mingjie Li,Liqin Wu,Chenghao Duan,Huiming Luo,Biao Zhou,Mumin Rao,Yongcai Qiu,Guangxu Chen,Keyou Yan
Biomass ethanol is regarded as a renewable resource but it is not economically viable to transform it to high-value industrial chemicals at present. Herein, a simple, green, and low-cost CuCl2–ethanol complex is reported for ethanol dehydration to produce ethylene and acetal simultaneously with high selectivity under sunlight irradiation. Under N2 atmosphere, the generation rates of ethylene and acetal were 165 and 3672 μmol g–1 h–1, accounting for 100% in gas products and 97% in liquid products, respectively. An outstanding apparent quantum yield of 13.2% (365 nm) and the maximum conversion rate of 32% were achieved. The dehydration reactions start from the photoexcited CuCl2–ethanol complex, and then go through the energy transfer (EnT) and ligand to metal charge transfer (LMCT) mechanisms to produce ethylene and acetal, respectively. The formation energies of the CuCl2–ethanol complex and the key intermediate radicals (e.g., ·OH, CH3CH2·, and CH3CH2O·) were validated to clarify the mechanisms. Different from previous CuCl2-based oxidation and addition reactions, this work is anticipated to supply new insights into the dehydration reaction of ethanol to produce useful chemical feedstocks.
研究领域:
催化
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绿色化学
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有机转化
·
光化学
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生物质转化
✓ 已验证
DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2024
·Vol. 18
·期 11
·1-14
·
IF 4.3
Mo Shuhua,Zheng Yao,Gong Jianyu,Lu Minsheng
The efficient fractionation and recovery of monosaccharides (xylose and glucose) from lignocellulosic biomass facilitates subsequent sugar-based derivative production. This study introduces a one-pot γ -valerolactone/ CuCl 2 biphasic pretreatment system (100-mmol·L -1 CuCl 2 , 180 °C, 60 min) capable of achieving removal rates of 92.25% and 90.64% for xylan and lignin, respectively, while retaining 83.88% of cellulose. Compared to other metal chlorides (NaCl, LiCl, FeCl 3 , and AlCl 3 ), the γ -valerolactone/CuCl 2 system recovered 121.2 mg·(g eucalyptus) -1 of xylose and 55.96 mg·(g eucalyptus) -1 of glucose during the pretreatment stage and 339.2 mg·(g eucalyptus) -1 of glucose during the enzymatic hydrolysis stage (90.78% of glucose yield), achieving a total monosaccharide recovery of 86.31%. In addition, the recovery of γ -valerolactone was 79.33%, exhibiting minimal changes relative to the pretreatment performance. The method proposed in this study allows a high total monosaccharides recovery and a circular economy-oriented pretreatment approach, offering a viable pathway for biorefinery.
研究领域:
生物工程
·
可再生资源技术
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Hongwei Xu,Yilin Zhang,Xiaxia Chen,Chenxi Guo,Mingyang Xu,Chao Liu,Jianguang Qi,Peizhe Cui,Yinglong Wang,Zhaoyou Zhu,Fanqing Meng
Piezoelectric catalysis has emerged as a highly effective strategy for the removal of organic pollutants from wastewater. Although the piezoelectric properties of polytetrafluoroethylene (PTFE) are well-established, the development of efficient charge transfer channels on PTFE to enhance its piezoelectric catalytic activity remains a significant challenge. In this study, we synthesized a CuCl 2 /PTFE piezoelectric catalyst via ball milling. The optimized CuCl 2 /PTFE degradation rate of tetracycline was 92.1 %, and the kinetic constant was 0.62 min −1 . The CuCl 2 /PTFE catalyst with a kinetic constant 4.97 times higher than PTFE. Combined with density functional theory (DFT) calculations, we propose a plausible piezoelectric catalytic degradation mechanism. The doping of CuCl 2 reduces the band structure of PTFE and promotes the separation of e − and h + , further producing ∙O 2 − , 1 O 2 and ∙OH to participate in the degradation of antibiotics. This work provides valuable theoretical insights for the application of piezoelectric catalysis in environmental remediation and clean energy production.
研究领域:
环境科学
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材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science-Nano
·
2023
·
IF 7.3
Tao Li,Yuhua Li,Peiyan Qin,Gehong Wei,Chun Chen
Phytophthora sojae is an oomycete pathogen that causes significant agricultural losses worldwide, mainly the soybean damping-off and root/stem rot. To counter this, copper oxide nanoparticles (CuO NPs)/reduced graphene oxide (rGO) composites (CuO-rGO) have been proposed as a potential solution in nano-agriculture. In this study, we aimed to investigate the inhibitory mechanisms of CuO-rGO, CuO NPs, and CuCl2 on P. sojae through phenotypic and transcriptomic analysis. Even a low concentration of 10 mg Cu2+ L−1, CuO-rGO, CuO NPs, and CuCl2 exhibited remarkable inhibitory effects on the pathogen. This was due to the capacity of these three forms of Cu to induce oxidative stress, which caused disruptions in the mycelial cell membrane, intracellular structure, carbon metabolism, organic acid metabolic processes, and amino acid metabolism. Among them, CuO-rGO showed a better slow-release effect and long-lasting antimicrobial properties, making it more suitable for practical agricultural use. Furthermore, the transcriptomic analysis revealed distinct patterns of antioxidant enzyme-related genes among treatments. Compared to the other two treatments, the CuO-rGO treatment showed higher expression of differential expression genes (DEGs) associated with superoxide dismutase (SOD) and peroxiredoxin (PRDX). The CuO NPs treatment had the most significant expression of DEGs related to catalase (CAT), while the DEGs linked to glutathione peroxidase (GPX) were significantly expressed in the CuCl2 and CuO-rGO treatments. These findings suggest that CuO-rGO has great potential as a practical agricultural agent against oomycete pathogens. Further investigations are essential to elucidate the mechanisms underlying the oxidative stress and antioxidant systems induced by different copper forms in the future.
研究领域:
农业
·
微生物学
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纳米技术
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植物病理学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2020
·Vol. 11
·期 1
·10
·
IF 3.52
Yang Dang,Yu Cheng,Yukun Zhou,Yifei Huang,Kaige Wang
The treatment of organic dye contaminants in wastewaters has now becoming more imperative. Fenton-like degradation of methylene blue (MB) and methyl orange (MO) in aqueous solution was investigated by using a nanostructure that a layer of CuCl2nanoflake film grown on the top surface of nanoporus anodic alumina substrate (nano-PAA-CuCl2) as catalyst. The new nano-PAA-CuCl2composite was fabricated with self-assembly approach, that is, a network porous structure film composed of CuCl2nanoflake grown on the upper surface of nanoporous anodic alumina substrate, and the physical and chemical properties are characterized systematically with the X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), and high-resolution transmission electron microscopy (HRTEM), Energy Dispersive Spectrometer (EDS), X-ray photoelectron spectroscopy (XPS). The experimental results showed that the nano-PAA-CuCl2catalyst presented excellent properties for the degradation of two typical organic pollutants such as MB and MO, which were almost completely degraded with 8 × 10−4mol/L nano-PAA-CuCl2catalyst after 46 min and 60 min at reaction conditions of H2O218 mM and 23 mM, respectively. The effects of different reaction parameters such as initial pH, H2O2concentration, catalyst morphology and temperature were attentively studied. And more, the stability and reusability of nano-PAA-CuCl2were examined. Finally, the mechanism of MB and MO degradation by the nano-PAA-CuCl2/H2O2system was proposed, based on the experimental data of the BCA and the temperature-programmed reduction (H2-TPR) and theoretical analysis, the reaction kinetics belonged to the pseudo-first-order equation. This new nanoporous composite material and preparation technology, as well as its application in Fenton-like reaction, provide an effective alternative method with practical application significance for wastewater treatment.Keywords:composite of nanoporous anodic alumina-CuCl2catalyst;Fenton-like reaction;advanced oxidation processes;organic pollutant;degradation mechanism
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2013
·Vol. 4
·期 1
·510-515
·
IF 2.562
Huan Wang,Baoqing Shentu,Zhixue Weng
A one-pot synthetic approach for the preparation of poly(2,6-dimethyl-1,4-phenylene oxide)/polystyrene (PPO/PS) alloy in aqueous medium was developed. The method was based on the combination of the oxidative coupling polymerization of 2,6-dimethylphenol (DMP) to form PPO in the presence of a reactive swelling agent, styrene (St), and in situ reverse atom transfer radical polymerization (RATRP) of St initiated by 2,2′-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride (AIBI) in alkaline aqueous solution. The complex of CuCl2 and 4-dimethylaminopyridine (DMAP) was utilized as the catalyst to catalyze the two types of polymerization mentioned above. Oxygen was employed as the sole oxidant to synthesize PPO. The introduction of St during the oxidative polymerization of DMP could increase the molecular weight of PPO. Finally thermodynamically compatible PPO/PS alloy was successfully prepared.
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Chenxing She,Xihong Zu,Zhiheng Yang,Liheng Chen,Zixin Xie,Hao Yang,Dongjie Yang,Guobin Yi,Yanlin Qin,Xuliang Lin,Wenli Zhang,Huafeng Dong,Xueqing Qiu
Biomass flow fuel cells (BFFCs) are promising alternatives for large-scale conversion of biomass into electricity at low temperature. However, most of them are based on single redox-active materials in anolyte which have limited capacity density and electron transfer rate, resulting in many natural biomass residues can’t generate electricity rapidly and efficiently. Herein, we develop a new anodic electron transfer chain based on CuCl 2 /TiOSO 4 synergetic mediators for BFFCs. The density functional theory (DFT) simulation and experiment results show that TiO 2+ /Ti 3+ redox couple works as an intermediate medium to construct a CuCl 2 /TiOSO 4 synergetic electron transfer chain, which strengthens the electron transfer rate between anolyte and graphite felt (GF) electrode. The CuCl 2 /TiOSO 4 synergetic mediators can efficiently and rapidly degrade glucose, industrial lignin and other natural biomasses at low temperature, and extract electrons simultaneously for generating electricity. The maximum power density (P max ) of CuCl 2 /TiOSO 4 -based BFFC is 146.7 mw·cm −2 when the anolyte is pre-reacted at 90 ℃ for 1 h with glucose as fuel and paired with VO 2 + /VO 2+ catholyte. And the fuel cell can discharge electricity continuously and stably for more than 6 h at 400 mA·cm −2 . Furthermore, it can stably power LED pattern with 92 bulbs. Besides, when the CuCl 2 /TiOSO 4 -based BFFC utilizes sodium lignosulfonate as fuel, its P max is 55.1 mW·cm −2 , and the BFFC can discharge electricity stably for more than 1 h at high output current density of 1.3 A·cm −2 . This work provides a promising approach for application in direct biomass wastes power generation.
研究领域:
能源生物学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 20
·4387
·
IF 4.967
Shiqian Hu,Zida Zheng,Ye Tian,Huihong Zhang,Mao Wang,Zhongwei Yu,Xiaowei Zhang
The growing issue of particulate matter (PM) air pollution has given rise to extensive research into the development of high-performance air filters recently. As the core of air filters, various types of electrospun nanofiber membranes have been fabricated and developed. With the novel poly(acrylonitrile) (PAN)-CuCl2composite nanofiber membranes as the filter membranes, we demonstrate the high PM removal efficiency exceeding 99% and can last a long service time. The nanoscale morphological characteristics of nanofiber membranes were investigated by scanning electron microscopy, transmission electron microscopy, and mercury intrusion porosimeter. It is found that they appear to have a special net structure at specific CuCl2concentrations, which substantially improves PM removal efficiency. We anticipate the PAN-CuCl2composite nanofiber membranes will be expected to effectively solve some pressing problems in air filtration.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 6
·1968-1977
·
IF 6.177
Yiwen Yang,Haifeng Qi,Zhanwei Xu,Z. Conrad Zhang
In this work, we identified the prevailing catalytically active species evolved from paired PdCl2–CuCl2 in 1-butyl-3-methylimidazolium chloride ([BMim]Cl) that displayed dramatic synergy between the two metal chlorides in catalyzing the hydrolysis of β-1,4-glycosidic bonds in cellulose. Ultraviolet-visible (UV-vis), far infrared (FIR), and electron paramagnetic resonance (EPR) spectroscopy provide clear evidence for the prominent evolutionary pathways to form the catalytically active species. It is observed that the strong synergy between [PdIICl4]2− and [CuIICl4]2− is initiated by the presence of a saccharide. In the absence of a saccharide, the spectroscopic features of [PdIICl4]2− and [CuIICl4]2− in their paired solution show little change with respect to those of individual metal chloride solutions. The evolution of a highly active heterometallic PdII–Cl–CuI complex from paired PdCl2–CuCl2 in the presence of saccharides is revealed by the transition of the FIR absorption peak of PdII–Cl. Glycolaldehyde as the simplest model compound, which is the same as the reducing end group of saccharides, is applied to determine the possible catalytic species. X-ray absorption spectroscopy (XAS) verifies that [CuIICl4]2− is reduced to [CuICl3]2− by glycolaldehyde. The HCl generated from reduced [CuIICl4]2− is also found to contribute to the hydrolysis of cellobiose, serving as another catalytically active species in paired PdCl2–CuCl2/[BMim]Cl. Paired PdCl2–CuCl2 pretreated with glycolaldehyde exhibits dramatically higher activity than direct use of paired PdCl2–CuCl2 in cellobiose conversion. Strikingly, the PdII–Cl–CuI complex is found to be substantially more active than HCl in the hydrolysis of β-1,4-glycosidic bonds as evidenced by the sustained high cellobiose conversion after neutralization of HCl with NaOH.
研究领域:
催化
·
化学工程
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2015
·Vol. 5
·期 6
·3333-3339
·
IF 5.426
Dong-Mei Lv,Zhong-Ning Xu,Si-Yan Peng,Zhi-Qiao Wang,Qing-Song Chen,Yumin Chen,Guo-Cong Guo
(Pd–CuCl2)/γ-Al2O3 catalyst with excellent activity and selectivity has been successfully developed for vapor-phase carbonylation of methyl nitrite to dimethyl carbonate (DMC). It has been demonstrated that Cl− is necessary for the superior selectivity (99.8%) to DMC, and that Cl− and Cu2+ have a synergetic effect. The Lewis acid sites of the γ-Al2O3 support may be suitable for vapor-phase carbonylation of methyl nitrite to DMC. Moreover, the catalytic mechanism of DMC formation on the (Pd–CuCl2)/γ-Al2O3 catalyst has been reasonably proposed based on the results of XPS and in situ diffuse reflectance infrared spectroscopy. The intermediate Cl–Pd(II)–COOCH3 is the key factor for the synthesis of DMC.
研究领域:
催化
·
化学工程
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
TENSIDE SURFACTANTS DETERGENTS
·
2023
·Vol. 60
·期 4
·368-375
·
IF 1
Yarou Yang,Xu Li,Jinxiang Dong
Benzene and 1-dodecene are often alkylated to produce linear alkylbenzene (LAB). LAB is the raw material for the production of linear alkylbenzene sulfonate (LAS), a very important anionic surfactant used in both industrial cleaning and commercial laundry processes, as well as in household laundry detergents. In the present study, we investigated the use of [Et 3 NH]Cl–2AlCl 3 modified with CuCl 2 as a catalyst for the alkylation of benzene with 1-dodecene, specifically looking at the effect of reaction conditions on product activity. The results showed that a conversion of 1-dodecene of 100.0 % and a selectivity of LAB of 93.79 % could be obtained when the following ideal reaction conditions were present: molar ratio of benzene/1-dodecene = 6, reaction temperature = 25 °C, reaction time = 10 min, stirring speed of 1000 rpm and addition of 5.0 mol % CuCl 2 ). The catalyst concentration was 7.0 mol %. FTIR and 31 P-TMPO-NMR measurements were performed to characterise the ionic liquid before and after the addition of CuCl 2 . After the addition of CuCl 2 , it was found that the acidity of the ionic liquid had decreased. The regeneration of the catalyst was also investigated and the cause of inactivation of the catalyst was determined. The results showed that CuCl 2 modified the ionic liquids and decreased the benzene/1-dodecene ratio, but the high product selectivity was maintained.
研究领域:
化学工程
·
催化剂科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）