JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2014
·
IF 2.063
Wenlu Guo,Xiangguo Meng,Yan Liu,Liang Ni,Zhaoyong Hu,Rui Chen,Minjia Meng,Yun Wang,Juan Han,Min Luo
The new 8-hydroxyquinoline (8-HQ) modified magnetic mesoporous carbon (8-HQ-Ni-CMK-3) was prepared and applied for adsorption of multivariate metal ions from aqueous solution. The prepared adsorbent was characterized by Fourier transform infrared, X-ray diffraction, scanning electron microscopy, transmission electron microscope, nitrogen adsorption-desorption isotherm, elemental analysis, and vibrating sample magnetometer. The static adsorption behaviors toward multivariate metal ions on graphite, the modified graphite by 8-HQ, magnetic mesoporous carbon, and 8-HQ-Ni-CMK-3 were compared, which showed that 8-HQ-Ni-CMK-3 had excellent adsorption capacity. The removal of multivariate metal ions using 8-HQ-Ni-CMK-3 by fixed-bed column was further investigated.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Zain Ali Saleh Bairq,Hongxia Gao,Fatima Abduh Mohammed Murshed,Paitoon Tontiwachwuthikul,Zhiwu Liang
In the CO2 capture process, decreasing the energy consumption and increasing the desorption rate of loaded MEA-CO2 during the regeneration process of monoethanol amine have been identified as major challenges that need to be addressed. To overcome these challenges, three modified heterogeneous mesoporous catalysts, CMK-3-SiO2, CMK-3-MCM-41, and CMK-3-SBA-15, and a SO42–/ZrO2 solid acid catalyst were initially synthesized and investigated to determine their catalytic effectiveness in the process of CO2 and MEA solvent regeneration with a CO2 loading of 0.5 ± 0.02 mol CO2/mol MEA at 97 °C. According to the experimental results, the CMK-3-modified catalyst significantly decreased the energy requirement for CO2 desorption. The catalytic performance of the synthesized catalysts was in the order of CMK-3-SiO2 > CMK-3-MCM-41 > CMK-3-SBA-15 > SZ. CMK-3-SiO2 exhibited the best catalytic performance by enhancing the desorption rate by 195%, and decreasing the energy requirement by 37.41% compared to monoethanol amine as a blank run. Furthermore, the CMK-3-SiO2 catalyst exhibited the best catalytic performance compared to the literature with excellent stability and no unfavorable effects on the MEA-CO2 absorption activity for the regenerated amine solvent. This performance seems to be a result of the large mesoporous surface area (BET) and the large number of Brϕnsted and Lewis acid sites. In addition, a reasonable reaction mechanism for amine solvent regeneration with the CMK-3 heterogeneous catalyst is proposed.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2015
·
IF 1.964
Junrui Li,Xiaohong Li,Yue Ding,Peng Wu
Pt nanoparticles entrapped in ordered mesoporous CMK-3 carbons with p6mm symmetry were prepared using a facile impregnation method, and the resulting materials were characterized using X-ray diffraction spectroscopy, N 2 adsorption-desorption, scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. The Pt nanoparticles were highly dispersed in the CMK-3 with 43.7% dispersion. The Pt/CMK-3 catalyst was an effective catalyst for the liquid-phase hydrogenation of nitrobenzene and its derivatives under the experimental conditions studied here. The Pt/CMK-3 catalyst was more active than commercial Pt/C catalyst in most cases. A highest turnover frequency of 43.8 s −1 was measured when the Pt/CMK-3 catalyst was applied for the hydrogenation of 2-methyl-nitrobenzene in ethanol under optimal conditions. It is worthy of note that the Pt/CMK-3 catalyst could be recycled easily, and could be reused at least fourteen times without any loss in activity or selectivity for the hydrogenation of nitrobenzene in ethanol.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2018
·Vol. 12
·期 4
·944-954
·
IF 7.411
Shi Qiu,Xuan Guo,Yong Huang,Yunming Fang,Tianwei Tan
Graphical Lignin first : A flexible lignin-first biorefinery could be developed by task-specific catalyst design for hemicellulose retention or feedstock extension. Mo x C/carbon nanotube (CNT) is found to be a promising catalyst for the retention of hemicellulose by cleavage of the bonds between lignin and carbohydrates with high selectivity. Ru/CMK-3 achieves the extension of the feedstock for the lignin-first biorefinery from hardwood to softwood. A catalytic reductive fractionation method for lignocellulosic biomass, termed lignin-first biorefinery, has emerged, which emphasises preferential depolymerization of the protolignin. However, in most studies, the lignin-first biorefinery is only effective for hardwood that has a high syringyl/guaiacol (S/G) ratio of lignin building blocks, and the degradation of hemicellulose also takes place simultaneously to a certain degree. In this study, two task-specific catalysts were developed to realize hemicellulose retention and feedstock extension through the development of an objective performance–structure relationship. It is found that Mo x C/carbon nanotube (CNT) is highly selective in the cleavage of bonds between carbohydrates and lignin and ether bonds in lignin during the catalytic reductive fractionation of hardwood, leading to a carbohydrate (both cellulose and hemicellulose) retention degree in the solid product close to the theoretical maximum and a delignification degree as high as 98.1 %. Ru/CMK-3 is demonstrated to be effective in the catalytic reductive fractionation of softwood and grass, resulting from its weak acidity and high mesoporosity.
研究领域:
生物化学
·
可再生资源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Fuchun Si,Xiaojing Cui,Yaping Zhang,Yifan Li,Huaixia Yang,Yanju Liu
Down-regulator of transcription 1 (DR1) is a crucial biomarker closely related to Hashimoto's Thyroiditis (HT). In this study, a highly selective electrochemical biosensor for ultrasensitive detection of DR1 was prepared by combining nanomaterials CMK-3 @AuNPs and atom transfer radical polymerization (ATRP) signal amplification strategy for the first time. Based on the specific recognition of antigen and antibody, the sensor has strong selectivity. CMK-3 @AuNPs can not only increase the conductivity of the electrode, but also provide more active sites for biological molecules, so as to effectively amplify the output signal. The FMMA monomers were polymerized on the electrode surface through ATRP reaction, which made the electrochemical signal increased significantly. Under optimal conditions, the fabricated electrochemical biosensor showed a wide detection range of 5 × 10 -4 ng/mL ∼ 5 × 10 2 ng/mL with a detection limit as low as 0.159 pg/mL. In addition, the electrochemical biosensor has good stability and anti-interference ability. Therefore, the sensor has broad prospects in the detection of biomarkers.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Zihan Shi,Dingqiang Lu,Wei Xu,Lihua Geng,Chang-jiang-sheng Lai
Developed an electrochemical biosensor for the bitter taste receptor TAS2R1, utilizing a nanocomposite of CMK-3 and AuNPs. • Proposed system-dependent C₁/₂,sys to quantify ligand-triggered electrochemical signals of the TAS2R1 biosensor. • H-bond & hydrophobic forces govern TAS2R1-ligand binding; Phe75, Ile254, Leu250, Phe252/259, Arg256 are key binding residues. The bitter taste receptor TAS2R1 mediates significant physiological functions not only in the gustatory system but also in extra-oral tissues, including the respiratory tract, immune system, and metabolic pathways. To elucidate its ligand recognition mechanism, we developed an electrochemical biosensor for TAS2R1 based on a composite of ordered mesoporous carbon and gold nanoparticles. The biosensor was used to quantitatively analyze the interaction kinetics with ten bitter ligands. Combined with molecular docking and molecular dynamics simulations, this study identified key residues in TAS2R1 that may be involved in ligand recognition; among these, the nitrogen-containing groups and hydroxyl groups of the ligand molecules appear to be important structural features influencing ligand recognition by TAS2R1. This work provides a molecular foundation for elucidating the structure-activity relationship of TAS2R1 and facilitates its applications in bitter taste masking and drug development. Download: Download high-res image (174KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2016
·Vol. 41
·期 39
·17462-17470
·
IF 3.205
Bing Zhai,Xuezhang Xiao,Wenping Lin,Xu Huang,Xiulin Fan,Shouquan Li,Hongwei Ge,Qidong Wang,Lixin Chen
NbF 5 and eutectic 0.68LiBH 4 –0.32Ca(BH 4 ) 2 were successively infiltrated into highly ordered mesoporous carbon (CMK-3) to obtain a LiBH 4 –Ca(BH 4 ) 2 –NbF 5 @CMK-3 composite. A synergetic effect of nanoconfinement and catalysis on hydrogen desorption properties of the composite was achieved. The onset desorption temperature of LiBH 4 –Ca(BH 4 ) 2 –NbF 5 @CMK-3 is dramatically lower than 120 °C compared with that of as-milled LiBH 4 –Ca(BH 4 ) 2 or LiBH 4 –Ca(BH 4 ) 2 @CMK-3. A hydrogen amount as high as 13.3 wt% can be released within 250 min for LiBH 4 –Ca(BH 4 ) 2 –NbF 5 @CMK-3, compared with only 10.4 wt% for pure LiBH 4 –Ca(BH 4 ) 2 , in which nanoconfinement and catalysis both make some contribution. The cycling hydrogen desorption performance of the composite becomes better likewise due to the addition of NbF 5 . Further microstructure analysis reveals that F − tended to bind with Ca 2+ to form CaF 2 , whereas Nb compound is believed to catalyze the whole system in the form of Nb-based boride (NbB 2 ).
研究领域:
材料科学
·
能源化学
·
纳米科技
·
储氢材料
·
物理化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 6
·期 4
·3235-3242
·
IF 3.84
Jun Hu,Yue Ding,Haidong Zhang,Peng Wu,Xiaohong Li
At near ambient temperature, Ru nanoparticles entrapped in ordered mesoporous carbons (OMCs) CMK-3 show superior efficiency in the green reduction process of nitrobenzene and its derivatives with hydrazine monohydrate as a hydrogen donor using water as solvent. The Ru/CMK-3 catalyst exhibited much higher activity than a commercial Ru/C catalyst purchased from Alfa Aesar toward the reduction of nitrobenzene with hydrazine monohydrate under the same conditions. The interaction of Ru nanoparticles with CMK-3 and the mesoporous structure of CMK-3 OMCs might play important roles in determining the catalytic performance of the Ru/CMK-3 catalyst. In addition, the catalytic performance of the Ru/CMK-3 catalyst for the reduction of nitrobenzene was also compared using different hydrogen sources. Hydrazine monohydrate was found to be suitable as a hydrogen donor for the reduction of nitrobenzene and its derivatives. Compared with those obtained in the reduction of nitrobenzenes using 4.0 MPa hydrogen, the catalytic activity of the Ru/CMK-3 catalyst obtained using hydrazine monohydrate as hydrogen donor was much higher in most cases.
研究领域:
催化化学
·
材料化学
·
绿色化学
·
纳米材料
·
有机合成
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Haolin Xiao,Shanshan Wei,Miao Gu,Zhencheng Chen,Liangli Cao
Alpha-fetoprotein (AFP) plays an important role as a marker in the clinical diagnosis of cancer. However, the sensitive detection of AFP in clinical samples is still challenging. Therefore, we developed a highly sensitive electrochemical immunosensor for the effective detection of AFP. In this study, thionine (Thi) and gold nanoparticles (AuNPs) co-modified reduced graphene oxide-tetraethylene pentamine (rGO-TEPA-Thi-Au), which was used as the immunosensor platform to fix the primary antibody (Ab 1 ), leading to a large improvement in the sensitivity of the immunosensor. Furthermore, ordered mesoporous carbon (CMK-3) modified with AuPt binary nanoparticles ( [email protected] ) was used as the signal probe for further signal amplification because CMK-3 can provide a large specific surface area for in-situ reduction of AuPtNPs with good conductivity. Therefore, a dual signal amplification was observed in the amperometric i-t curve, and the detection limit of the proposed immunosensor was effectively enhanced. The constructed immunosensor showed a wide linear range of 0.005 to 100 ng mL −1 and a low detection limit of 0.0022 ng mL −1 at S/N = 3. Furthermore, the proposed immunosensor exhibited excellent stability and recovery, demonstrating its potential for clinical applications.
研究领域:
生物传感器
·
癌症诊断
·
纳米技术
·
电化学
·
分析化学
·
材料科学
✓ 已验证
DOI
高影响因子
Engineering
·
2023
·
IF 12.8
Lei Li,Jing Bai,Panyu Jiang,Yan Zhang,Tingsheng Zhou,Jiachen Wang,Changhui Zhou,Jinhua Li,Baoxue Zhou
Hydrogen peroxide (H 2 O 2 ) in situ electrosynthesis by O 2 reduction reaction is a promising alternative to the conventional Fenton treatment of refractory wastewater. However, O 2 mass transfer limitation, cathodic catalyst selectivity, and electron transfer in O 2 reduction remain major engineering obstacles. Here, we have proposed a systematic solution for efficient H 2 O 2 generation and its electro-Fenton (EF) application for refractory organic degradation based on the fabrication of a novel ZrO 2 /CMK-3/PTFE cathode, in which polytetrafluoroethylene (PTFE) acted as a hydrophobic modifier to strengthen the O 2 mass transfer, ZrO 2 was adopted as a hydrophilic modifier to enhance the electron transfer of O 2 reduction, and mesoporous carbon (CMK-3) was utilized as a catalyst substrate to provide catalytic active sites. Moreover, feasible mass transfer of O 2 from the hydrophobic to the hydrophilic layer was designed to increase the contact between O 2 and the reaction interface. The H 2 O 2 yield of the ZrO 2 /CMK-3/PTFE cathode was significantly improved by approximately 7.56 times compared to that of the conventional gas diffusion cathode under the same conditions. The H 2 O 2 generation rate and Faraday efficiency reached 125.98 mg·cm − 2 ·h − 1 (normalized to 5674.04 mmol·g − 1 ·h − 1 by catalyst loading) and 78.24% at −1.3 V versus standard hydrogen electrode (current density of −252 mA·cm − 2 ), respectively. The high H 2 O 2 yield ensured that sufficient ·OH was produced for excellent EF performance, resulting in a degradation efficiency of over 96% for refractory organics. This study offers a novel engineering solution for the efficient treatment of refractory wastewater using EF technology based on in situ high-yield H 2 O 2 electrosynthesis.
研究领域:
环境工程
·
化学工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Xiaoxiang Cheng,Peijie Li,Xuewu Zhu,Congwei Luo,Lu Zheng,Chengsi Hou,Daoji Wu,Heng Liang
In this study, carbon nanoparticles (CNPs) in different structural dimensions, including carbon nanotubes (CNTs), carbon nanofibers (CNFs), hexagonally (CMK-3) and cubically (CMK-8) ordered mesoporous carbons were proposed for peroxymonosulfate (PMS) activation. The performance for catalytic oxidation of organic pollutants and alleviating ultrafiltration membrane fouling was systematically investigated and compared. The results showed that CMK-3 performed best for PMS activation in the reduction of typical micropollutants and natural organic matter, whereas the efficiency of CNFs was relatively limited. The CNPs/PMS processes were efficient alternatives for alleviating membrane fouling, whereas discrepancies existed in the performance for different CNPs. Both the decomposition of macromolecular biopolymers and the degradation of fluorescent components reduced the foulants directly contacting with membranes, thus contributing to the fouling mitigation. The characterization of fouled membranes (i.e., surface morphologies and functional groups) further verified the fouling alleviation. From a comparison view, the decomposition of PMS by CMK-3 was more effective compared to the other CNPs, with the catalytic capacity of CMK-3 > CNTs > CMK-8 > CNFs. The discrepancy was likely ascribed to the microstructure differences of carbonaceous materials. To be specific, CNTs exhibited a curled-like shape with smaller diameter and larger specific surface area than CNFs, while CMK-3 showed long straight and parallel channels with decreased internal resistances than CMK-8. The electron paramagnetic resonance analyses revealed that SO 4 − , OH, O 2 − and 1 O 2 were the main reactive oxygen species generated in the systems. The CNPs/PMS processes significantly changed the fouling mechanisms by delaying the formation of cake layers and prolonging the transition volumes. These findings possess a guiding significance for the application of carbon-based catalytic oxidation in membrane water treatment processes.
研究领域:
环境科学
·
水处理
·
纳米技术
·
催化
✓ 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）