Biomass Conversion and Biorefinery
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2025
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IF 4.1
Mubashir Tayyaba,Farrukh Aftab,Hassan Najam Ul,Mahmood Rashid,Nasir Zonaira,Tahir Mudassir Hussain
This study investigates the effectiveness of a two-stage process aimed at achieving sustainable aromatic production through the co-pyrolysis of biomass and plastic, followed by catalytic reforming utilizing an Fe-modified ZSM-5 catalyst. To characterize the thermal decomposition behavior and monitor the progression of volatile compounds during the co-pyrolysis process, we employed thermogravimetric analysis (TGA) in conjunction with Fourier transform infrared (FTIR) spectroscopy and gas chromatography-mass spectrometry (GC–MS). Additionally, we conducted a compositional analysis of the resultant bio-oil. This study demonstrates that the co-pyrolysis process, employing a catalyst-to-feedstock ratio of 1:1 with the 10Fe/ZSM-5 catalyst (10 wt.% Fe loading), significantly increases the yield of aromatic hydrocarbons to 67.38%. This yield is markedly higher compared to the aromatic hydrocarbon yield of 55.37% obtained from catalytic pyrolysis of biomass alone. Moreover, these findings highlight the potential of this integrated methodology as a promising pathway for transforming waste materials into value-added chemicals, thereby improving bio-oil quality through the enrichment of aromatic compounds.
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GREEN CHEMISTRY
·
2024
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IF 9.3
Liequan Liu,Zikang Gong,Chen Liu,Aiping Peng,Ze Zhang,Ji Yu,Jianxin Cai,Zhenyu Yang
Due to the inherent limitations of commercial liquid electrolytes, such as flammability, volatility, leakage, and their inability to effectively inhibit the growth of lithium dendrites, the lithium battery research community has shifted its attention towards advancing solid-state electrolytes. Notably, polyethylene oxide (PEO) has emerged as a respected solid-state electrolyte, but its ionic conductivity still exhibits a relatively modest level. In this study, we fabricated the Li-IL@Fe-BDC composite by integrating lithium salt-loaded ionic liquids (Li-ILs) into cost-effective and environmentally friendly Fe-based MOF frameworks (Fe-BDC). The resulting composite filler was then incorporated into a PEO matrix, yielding flexible composite polymer electrolytes (CPEs) with a “brick and mortar” hybrid structure. This unique arrangement enhances the mechanical strength of CPEs, providing dispersed sites and multi-ion transport channels. Consequently, it achieves a high conductivity of approximately 4.9 × 10−4 S cm−1, an extended electrochemical window of about 4.8 V, and a notable Li+ transference number of ∼0.6. Moreover, the composite demonstrates excellent interfacial compatibility with the Li metal and remarkable resistance against dendrite growth during plating/stripping cycles, sustaining over 800 hours at a current density of 0.2 mA cm−2. Furthermore, LiFePO4/CPEs/Li cells exhibit outstanding capacity retention, reaching as high as 95.8% after 700 cycles at 1 C. These exceptional electrochemical performances can be attributed to the distinctive characteristics of the Li-IL@Fe-BDC composite filler, which provides multiple pathways for lithium ion migration and enhances interfacial stability. Consequently, this study unveils a promising approach for achieving high Li-ion conductivity and interfacial stability in CPEs, offering valuable insights for future breakthroughs in this burgeoning field with a focus on green chemistry principles.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
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IF 4.3
Sijia Xie,Qiyu Lei,Linyu Zeng,Hai Xiong
An efficient mimic peroxidase platform of Fe-CDs/GOx based on the hybrid cascade system to produce in-situ H 2 O 2 for the visualized detection of glucose has been also developed in our group. Herein, the [Fe-CDs + H 2 O 2 + TMB] system was further performed to detect the biothiols (GSH, Cys, and Hcy) as representatives of the –SH group. The result exhibits that the higher concentration of biothiols can cause the absorbance signal at 652 nm to decrease, and the deep-blue color of oxTMB turns green until it is faded in 20 min by the naked eye. The colorimetric method showed the LOD are 0.54, 0.29, and 1.41 μM for GSH, Cys, and Hcy respectively, without interference in the presence of other amino acids. The smartphone-based and paper-based determination display good respect for biothiols in human serum or GSH in red wine. These simple and convenient strategies provide potential applications in the fields of clinical diagnosis and foods.
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PubMed
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JOURNAL OF MEMBRANE SCIENCE
·
2025
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IF 9
Jiahui Zhang,Hongyi Zhang,Zhen Chen,Zhenghua Zhang
Pervasive exposure to different micropollutants (e.g. endocrine disrupting chemicals and pharmaceuticals) present in water environments, presents a notable risk to public health. Herein, three Co-based bimetallic layered double hydroxides (LDHs) were fabricated, then assembled into LDH-based nanoconfined catalytic membranes (CoM m , M: Fe, Mn, and Cu) with similar structural and physicochemical properties. The micropollutant removal performance of CoM m in the presence of peroxymonosulfate (PMS) was ranked in the order: CoMn m > CoFe m > CoCu m . The CoMn m achieved a 100% removal efficiency for pharmaceuticals and endocrine disrupting chemicals, achieving a first-order rate constant (1.64 ms −1 for ranitidine) that was 10 2 –10 6 higher than traditional LDH catalysts. Density functional theory (DFT) results revealed that CoMn m possessed the highest adsorption energy with PMS and d-band centre, exhibiting superior chemisorption activity and faster charge transfer than the other prepared membranes. Furthermore, the nanoconfinement effect within membrane nanochannels contributed to the outstanding performance of CoMn m . This study provides an atomic-scale understanding of the catalytic mechanisms of CoM m , guiding the design and optimization of catalytic membranes for water purification.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2024
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IF 3.7
Dandan Zhou,Shilong Li,Luyi Chai,Jian Lu,Tianxiang Yu,Yuqing Sun,Wenheng Jing
ABSTRACT Two-dimensional (2D) catalytic ozonation membranes are promising for the treatment of micropollutants in wastewater due to simultaneous ozone-catalyzed degradation and membrane filtration processes. However, it remains challenging for 2D catalytic ozonation membranes to efficiently degrade micropollutants due to low mass-transfer efficiency and poor catalytic activity. Herein, Fe/Mn bimetallic metal–organic framework (MOF) intercalated lamellar MnO 2 membranes with fast and robust ozone-catalyzed mass-transfer channels were developed on the surface of the hollow fiber ceramic membrane (HFCM) to obtain 2D Fe/Mn-MOF@MnO 2 -HFCM for efficiently degrading micropollutants in wastewater. The intercalation of Fe/Mn-MOF expanded the interlayer spacing of the MnO 2 membrane, thereby providing abundant transport channels for rapid passage of water. More notably, the Fe/Mn-MOF provided enriched reactive sites as well as high electron transfer efficiency based on the redox cycling between Mn 3+ /Mn 4+ and Fe 2+ /Fe 3+ , ensuring the effective catalytic oxidative degradation of micropollutants including tetracycline hydrochloride (TCH), methylene blue, and methyl blue. Moreover, the carboxyl groups on the MOF formed covalent bonds (–COO–) with the hydroxyl groups in MnO 2 between layers, which increased the interaction between MnO 2 nanosheets to form stable interlayer channels. Specifically, the optimal composite membrane achieved a high removal rate of TCH micropollutant (93.4%), high water treatment capacity (282 L·m –2 ·h –1 ·MPa –1 ), and excellent long-term stability (1200 min). This study provides a simple and easily scalable strategy to construct fast, efficient, and stable 2D catalytic mass-transfer channels for the efficient treatment of micropollutants in wastewater.
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CHEMICAL ENGINEERING JOURNAL
·
2017
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IF 6.216
Qing Chang,Long Liu,Yaseen Muhammad,Shaoxia Weng,Zhenfei Feng,Tengyou Wei,Jingling Lei,Zhangfa Tong,Zhenxia Zhao
A magnetic Fe-N doped hollow acicular porous carbon (FeN-HAPC) with dopamine was successfully fabricated using a green free template-removal strategy for Lumbrukinase (LK) immobilization. FeN-HAPC was characterized by SEM , TEM , XRD, N 2 adsorption, XPS and FT-IR. Results revealed that immobilized LK through adsorption on FeN-HAPC possessed high activity (350 U/mg), good reusability (∼80% of initial value after 7th usage), and storage stability (86.0% at 4 °C for 30 days). Moreover, dopamine modification of FeN-HAPC ( [email protected] ) further significantly enhanced the amount and adsorption affinity towards immobilized LK, and thus exhibiting higher enzyme activity (617.5 U/mg) and reusable performance (87.3% for the 7th usage), and storage stability (92.4% at 4 °C for 30 days). Its deactivation half-life was 6–14 times longer than those immobilized over conventional Fe 3 O 4 microsphere or free ones. The deactivation energy of [email protected] /STI-LK was 146 kJ/mol, much higher than free LK and Fe 3 O 4 @CTS/STI-LK samples. Thus, the composite prepared in this study, attributed to possessing hollow structures with magnetic characteristic, high specific surface area, and high dispersion of affinity sites can be deemed as a promising candidate for enzyme adsorptive immobilization in practical applications.
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RSC Advances
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2017
·Vol. 7
·期 24
·14382-14388
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IF 3.108
Xueyan Xu,Chengxiang Shi,Qi Li,Rui Chen,Tiehong Chen
We report a facile two-step pyrolysis and acid leaching process to fabricate a high performance oxygen reduction reaction (ORR) electrocatalyst Fe2O3@Fe–N–C, which is composed of Fe–N-doped carbon foam nanosheets with embedded carbon coated Fe2O3 nanoparticles to enhance the ORR performance in acidic medium. The ORR activities of the Fe2O3@Fe–N–C electrocatalysts obtained at different pyrolysis temperatures are investigated and the catalyst fabricated by pyrolysis at 800 °C displays the optimal activity. A rotating disk electrode (RDE) study reveals that it exhibits a positive half-wave potential of 0.535 V (vs. Ag/AgCl), high selectivity (4e− process), excellent long-term stability (96.3% of the initial current remaining after 20 000 s of continuous operation) and good tolerance against the methanol-crossover effect in acidic medium, making it a promising candidate for substituting the commercial Pt/C catalyst in polymer electrolyte membrane fuel cells (PEMFCs). The remarkable ORR activity originates from the cooperative effect of carbon coated Fe2O3 nanocrystals and Fe–N-doped carbon foam nanosheets. Moreover, the porous structure, high specific surface area, and electron conductivity could contribute to the enhanced ORR performance.
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FOOD CHEMISTRY
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2024
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IF 8.5
Yu Zou,Wanshan Wang,Fengyin Duan,Wen Yun,Hong Chen,Yiping Li,Lizhu Yang
An ultrasensitive fluorescence detection strategy of chloramphenicol (CAP) was developed based on product catalysis of tetrahedral DNA framework (TDF) and fluorescent quenching of MIL-101(Fe). The product was used to catalyze the reaction. As the concentration of catalyst increased, the reaction time was significantly shorted to 21 min which was much shorter than other isothermal amplification technologies. Moreover, the multiple fluorophores of TDF and high efficient quenching ability of MIL-101(Fe) provided better performance with a linear range for CAP detecting from 1.6 pM to 80 pM and the limit of detection (LOD) as low as 0.67 pM. In addition, it also demonstrated good specificity and resistance to interference from other related antibiotics. Importantly, this strategy exhibited satisfactory relative standard deviation and recovery results for practical application, exhibiting a favorable application prospect in CAP analysis.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2024
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IF 3.8
Xie Sijia,Zeng Yating,Li Jinfu,Lu Xuemei,Xiong Hai
Nanozyme technology has gained significant regard and been successfully implemented in various applications including chemical sensing, bio-medicine, and environmental monitoring. Fe-CDs were synthesized and characterized well in this study. As compared to HRP (3.7 mM), the Fe-CDs exhibited a higher affinity towards H 2 O 2 (0.2 mM) using the steady-state kinetic assay and stronger catalytic capability by changing the color of TMB to the blue color of the oxidized state, oxTMB. Additionally, an efficient peroxidase mimic, Fe-CDs/GOx, based on the hybrid cascade system to produce in situ H 2 O 2 for the visual detection of glucose (color change: colorless to blue, and then to green), has been developed in detail, with limits of detection (LODs) for H 2 O 2 and glucose of 0.33 μM and 1.17 μM, respectively. The changes further demonstrate a linear relationship between absorbance and H 2 O 2 concentration, ranging from 10 to 60 μM, and for glucose (1 to 60 μM). To assess the accuracy and detection capability of the Fe-CDs/GOx system, we evaluated a real human serum sample obtained from adult males in a local hospital. In conclusion, Fe-CDs serving as a peroxidase mimic have the potential for various applications in the fields of biomedicine and nanozymes. Graphical Abstract
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BIOMACROMOLECULES
·
2025
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IF 5.4
Fengyi Du,Lixia Xu,Haoran Wang,Mengke Lu,Qinxin Wang,Xiaonan Qiu,Baoding Chen,Miaomiao Zhang
Photothermal therapy-triggered whole-tumor cell antigens release has revolutionized in situ cancer vaccine, but insufficient anticancer immunity cycle activation greatly limits its curative effect. Herein, we designed an NIR-triggered cascading in situ vaccine (FCDs-A/C@HGs) by incorporating the Fe-doped carbon dots (FCDs), azo-initiator (AIPH), and immune adjuvant (cyclophosphamide) into the thermosensitive hydrogel. Due to iron doping, the as-prepared FCDs exhibited high photothermal conversion performance and favorable MR imaging capability. Upon intratumoral injection, local hyperthermia mediated by FCDs-A/C@HGs and the subsequent generation of alkyl radicals from AIPH synergistically induced immunogenic cell death in tumor cells. Remarkably, the FCDs-A/C@HGs elicited strong anticancer immune activation by inhibiting regulatory T cells and promoting dendritic cell maturation, thereby enhancing differentiation of cytotoxic CD8+ T cells and memory T cells. This study presents an effective therapeutic platform for in situ tumor suppression and sustained activation of the anticancer immunity cycle.
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PubMed
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ENERGY & FUELS
·
2024
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IF 5.2
Lijuan Peng,Jiahuan Zhong,Chengkai Zhang,Yaohao Zhang,Dingsheng Yuan
Flexible quasi-solid zinc–air batteries, known for their efficiency and promising potential as an energy storage system, have found extensive applications in the fields of portable power supply, wildlife rescue, and flexible wearable devices. Herein, a FeNx/ZnSe/Fe heterojunction nanocomposite anchored on leafy nitrogen-doped carbon (FeNx/ZnSe/Fe–NC) is developed as a highly active bifunctional catalyst via one-step high-temperature selenization of Fe-doped zeolitic imidazolate frameworks 8. The formation of the heterostructure FeNx/ZnSe/Fe is conducive to accelerating electron transfer and improving the activity of the oxygen reduction reaction and oxygen evolution reaction. Moreover, FeNx/ZnSe/Fe–NC exhibits exceptional performance in liquid Zn–air batteries, comparable to the potency of industrially produced catalysts fabricated from precious metals. Notably, the gel polymer electrolyte (GPE) with a double-network structure, composed of poly(vinyl alcohol)- and polyacrylamide-modified with dimethyl sulfoxide (PVA–PAM–DMSO), exhibits significantly higher conductivity (193.5 mS cm–1) and excellent water retention (93.6%). As a result of the FeNx/ZnSe/Fe–NC catalyst and PVA–PAM–DMSO GPE, a flexible Zn–air battery with high-rate capability has been achieved, which demonstrates a high open-circuit potential of 1.51 V. This battery displays exceptional performance with excellent durability, adaptability, and adjustment capacity across a broad temperature range.
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CATALYSIS LETTERS
·
2024
·
IF 2.3
Yu Lihua,Zhao Yaling,Guo Shuai,Xue Juanqin
Metal–organic frameworks (MOFs) were used as precursors to prepare iron-based heterogeneous Fenton catalysts Fe@C, FeCu@C, and FeCu@N–C via pyrolysis. The catalytic activities were evaluated by measuring the decomposition rate of hydrogen peroxide (H 2 O 2 ). The morphology, structure, and physical properties of the catalysts were analyzed through X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and nitrogen adsorption. The results showed that at 60 min, the decomposition rates of H 2 O 2 by FeCu@C and FeCu@N–C were 95.4% and 92.5%, respectively, which were 18.5% and 15.6% higher than that by Fe@C, respectively. It was speculated that the iron and copper species present in the bimetallic nanoparticles were available active sites for the Fenton reaction. The synergistic effects between them can promote the activation and decomposition of H 2 O 2 . In addition, the nitrogen-doped catalysts FeCu@N–C had better pH applicability, better reusability, and lower iron leaching than FeCu@C. Nitrogen-doped carbon contributed to the enhanced catalytic performance. This can be attributed to the well dispersibility of Fe and Cu species on the N-doped carbon matrix. The FeCu@N–C was applied to the treatment of enrofloxacin (ENR) antibiotic wastewater. The results indicated that a 90% degradation rate can be achieved in 60 min under the initial concentration of ENR 20 mg/L, catalyst dosage 20 mg/L, H 2 O 2 concentration 1.5 mM, the initial solution pH 3.60, 25 ℃. The rapid degradation of ENR was more relevant to the surface-bound ٠OH rather than free ٠OH and the heterogeneous Fenton reaction played the dominant role. This work provides a potential heterogeneous Fenton catalyst for antibiotics wastewater treatment. Graphical Abstract
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