APPLIED CATALYSIS A-GENERAL
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2009
·Vol. 358
·期 2
·173-179
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IF 3.19
Guan Huang,Shang-Yue Liu,Yong-An Guo,Ai-Ping Wang,Jin Luo,Chun-Cai Cai
The search for a reusable material as an efficient and economic catalyst for hydrocarbon oxidation is an important field of research. In this study, we investigated the highly effective combination of support and metalloporphyrin provided by manganese tetraphenylporphyrin adsorbed onto a precursor of freshly precipitated aluminium hydroxide, followed by conversion to a manganese porphyrin/boehmite compound. This was characterized using FT-IR, UV–vis spectroscopic techniques, N 2 BET analysis, X-ray powder diffraction, transmission electron micrograph technique and thermal analysis. Aerobic oxidation of cyclohexane has been investigated using the compound as a catalyst under mild conditions and in the absence of any solvent and reductant. The results indicate that it has higher catalytic activity than manganese tetraphenylporphyrin and the corresponding chitosan-supported catalyst. In particular, the catalyst exhibits good atom economy for cyclohexane oxidation, high catalyst turnover number, and good ketone and alcohol selectivity. In particular, it has excellent reusability, with no change in original catalytic activity; a quantity of catalyst containing only 1 mg of Mn TPP can be reused 8 times under the promotion of beomite (BM). In addition, we examined the reaction conditions for the use of such nanoparticle-supported manganese tetraphenylporphyrin as a mild and environmental friendly oxidation catalyst.
研究领域:
催化化学
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纳米材料
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绿色化学
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有机氧化反应
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多相催化
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JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
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2015
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IF 3.615
Ze Feng,Yujia Xie,Fang Hao,Pingle Liu,He'an Luo
A series of manganese metalloporphyrins were prepared and tested in cyclohexane oxidation. It has been found that the manganese 5,10,15,20-tetrakis(4-nitrophonyl) porphyrin (Mn-TNPP) presents better catalytic performance. The Mn-TNPP was then immobilized on different supports, and characterized by UV–vis, FT-IR, XRD, TG/DTG and ICP. Among these supported Mn-TNPP catalysts, Mn-TNPP/ZnO exhibits the best selectivity to KA oil and higher turnover number in cyclohexane oxidation. The influence of the reaction conditions and the recycle of the catalysts are discussed. Mn-TNPP/ZnO catalyst presents the average cyclohexane conversion of 7.17%, KA oil selectivity of 91.18%, and the average catalytic turnover number of 6.53 × 10 4 after six times of recycle under 150 °C and 1.0 MPa.
研究领域:
催化化学
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有机合成
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工业化学
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材料化学
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绿色化学
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Biomedical Materials
·
2024
·Vol. 19
·期 3
·035009
·
IF 3.9
Guancheng Zhan,Lixia Yu,Qiqi Wang,Longyang Jin,Xiaohong Yin,Xiaodong Cao,Huichang Gao
Corneal stromal injury is a common surgical disease. With the development of tissue engineering materials, many artificial corneal scaffolds have been developed to replace allograft corneal transplantation and solve the problem of corneal donor shortage. However, few researchers have paid attention to corneal stromal wound healing. Herein, a nanocomposite of amino modified mesoporous bioactive glass (MBG-NH2) and microRNA-133b (miR-133b) was introduced into the patterned collagen films to achieve corneal stromal injury repair. MBG-NH2 nanoparticles as a nano delivery carrier could efficiently load miR-133b and achieve the slow release of miR-133b. The physicochemical properties of collagen films were characterized and found the microgrooved collagen films loaded with miR-133b@MBG-NH2 nanoparticles possessed similar swelling properties, optical clarity, and biodegradability to the natural cornea. In vitro cell experiments were also conducted and proved that the patterned collagen films with miR-133b@MBG-NH2 possessed good biocompatibility, and miR-133b@MBG-NH2 nanoparticles could be significantly uptake by rabbit corneal stromal cells (RCSCs) and have a significant impact on the orientation, proliferation, migration, and gene expression of RCSCs. More importantly, the patterned collagen films with miR-133b@MBG-NH2 could effectively promote the migration of RCSCs and accelerate wound healing process, and down-regulate the expression levels of α-SMA, COL-I, and CTGF genes associated with myofibroblast differentiation of corneal stromal cells, which has a potential application prospect in the repair of corneal stromal injury.
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Journal of the Taiwan Institute of Chemical Engineers
·
2025
·
IF 6.3
Ji-Long Sun,Da-Shuai Li,Ting-Ting Li,Ching-Wen Lou,Xu Han,Hai-Tao Ren
Background Corrosion, being a pervasive and inevitable natural occurrence, poses a grave threat to engineering equipment, human well-being, and the environment. Polyaniline (PANI) is an excellent anti-corrosion filler that enhances the corrosion resistance of steel surface. The traditional PANI preparation methods are chemical oxidation or electrochemical oxidation at low temperature, and the reaction conditions are harsh and easy to cause energy waste. Methods Novel ECN@PANI composite fillers were synthesized using nitric acid etched g-C 3 N 4 (ECN) as photoinitiator at room temperature. ECN@PANI/WEP coatings were prepared by using synthetic ECN@PANI composites as corrosion inhibitors and waterborne epoxy resin (WEP) as raw materials. ECN@PANI/WEP coatings were then hydrophobically modified with polydimethylsiloxane (PDMS) to yield ECN@PANI/HWEP coatings. The comprehensive structures and optical properties were thoroughly evaluated through Field Emission Scanning Electron Microscopy (FESEM), X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), Electrochemical Impedance Spectroscopy (EIS) and Diffuse Reflectance Spectroscopy (DRS) studies. Significant findings ECN@PANI composite fillers with excellent anticorrosive properties were prepared by photocatalytic polymerization using ECN as a photoinitiator. XPS and XRD results show that ECN@PANI/HWEP coating forms a dense passivation layer (Fe 3 O 4 ) on Q235 steel surface, which reduces the corrosion of steel to the maximum extent; ECN@PANI/HWEP produces active substances under light, which oxidize, fracture, and degrade the cell wall when in contact with the cells, resulting in a coating with better anti-algae properties; and the ECN@PANI/HWEP coating refracts part of UV rays and converts the remaining UV rays into heat to achieve excellent UV resistance properties. Combining outstanding UV resistance and anti-algae properties, the ECN@PANI/HWEP coating ensures long-term corrosion protection.
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Tianyu Hu,Fang Zou,Jie Yu,Siqian He,Shiyun Lai,Yuanjie Teng,Zaifa Pan
UNCA employs upconversion nanoparticles as signal probes for specific IGF-1 recognition. • Single-molecule counting enables IGF-1 detection with a low LOD of 6.04 pg/mL. • This method exhibits low cross reactivity and good recovery rates in milk products. There is rapidly growing interest in food nutrition assessment, particularly for nutrients present at low abundance. Here, an upconversion nanoprobe counting analysis (UNCA) is designed for ultra-sensitive detection of insulin-like growth factor-1 (IGF-1). The high sensitivity is attributed to the strong fluorescent intensity of upconversion nanoparticles (UCNPs) and highly specific antibody-antigen binding. Core–shell structured UCNPs are synthesized via co-precipitation followed by layer-by-layer epitaxial growth, and detection probes are constructed through hydrophilic ligand exchange and antibody conjugation. Two detection methods, traditional fluorescent intensity detection and single-molecule counting, are established with linear working ranges of 0.05–5000 ng/mL, which reach limit of detections (LODs) of 21.23 and 6.04 pg/mL, respectively. UNCA is further employed for analyzing three representative milk products, achieving recovery of 73.90%–107.09% with coefficients of variation (CVs) between 2.24% and 7.57%. This method demonstrates quantitative detection of trace-level IGF-1, especially via single-molecule counting. Download: Download high-res image (111KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Hongyan huang,Shengji Wu,Hui Wang,Jie Zhou
Thermal pretreatment reduces rather than improves Hg 0 removal of AC. • Acidic functional groups serve as the active centers for Hg 0 oxidation. • Hydrogen-bonded microenvironment enhances catalytic activity of acidic sites. • Synergy of acid sites and microenvironment enables high-efficiency Hg 0 removal. Activated carbon injection is a mainstream technology for elemental mercury (Hg 0 ) removal from flue gas. This study investigates an abnormal phenomenon that thermal pretreatment of AC reduces rather than improves its Hg 0 removal efficiency, and systematically elucidates the underlying mechanism. The results demonstrate that acidic sites (e.g., carboxyl groups) on the AC surface serve as the active centers for the catalytic oxidation of Hg 0 , while the hydrogen-bonded microenvironment formed by adsorbed H 2 O molecules significantly enhances the acidity strength and catalytic activity of the acidic sites. Removal of the hydrogen-bond microenvironment severely reduces Hg 0 removal performance, whereas supplementation of H 2 O or other hydrogen-bond donor molecules effectively recovers the Hg 0 removal efficiency. At medium-to-high temperatures, constructing a thermally stable microenvironment (e.g., using benzoic acid) significantly improves the Hg 0 removal efficiency of AC. Based on this synergistic mechanism, the acid-treated and benzoic acid-modified AC (AC-H-150-benzoic acid) could achieve an initial Hg 0 removal efficiency of 75.8% at 150 °C. This work reveals the synergistic effect between acidic sites and the hydrogen-bonded microenvironment on AC for Hg 0 removal, providing new insights for the rational design of high-performance Hg 0 removal adsorbents. Download: Download high-res image (182KB) Download: Download full-size image
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JOURNAL OF MEMBRANE SCIENCE
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2026
·
IF 8.8
Xiaozhen Lu,Lin Wang,Bin Liu,Hong Peng,Xuewu Zhu
Nanofiltration (NF) for advanced drinking-water treatment has long been constrained by the need to remove contaminants while preserving beneficial mineral ions in health-oriented drinking water. Herein, an ethylene-glycol (EG)-regulated aqueous microenvironment was introduced to tailor the interfacial polymerization process. EG-mediated hydrogen bonding and modified interfacial thermodynamics jointly regulated piperazine diffusion, interfacial transport, and polymerization kinetics, producing polyamide NF membranes with enhanced negative charge surface density and a more uniform effective pore structure. Compared with the pristine membrane, the EG-20 membrane exhibited a thinner, more hydrophilic, and more negatively charged selective layer, together with a narrower pore-size distribution. The optimized EG-20 membrane achieved a permeance of 23.6 L m −2 h −1 bar −1 while maintaining Na 2 SO 4 rejection above 95.5%. In the treatment of natural surface water, dissolved organic matter removal reached approximately 92.1%, while partial passage of beneficial mineral ions was maintained, enabling effective organic contaminant removal with mineral preservation for health-oriented drinking water treatment. Moreover, high rejection of PFAS and antibiotics was maintained, mainly because steric exclusion and enhanced electrostatic repulsion compensated for the moderately enlarged effective pores. In addition, the membrane showed improved antifouling performance, as enhanced surface hydration and electrostatic repulsion reduced foulant adhesion and suppressed irreversible fouling. Overall, this microenvironment-regulation strategy provides a feasible route for developing NF membranes that integrate effective contaminant control, mineral preservation, and stable operation.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Wenjun Cheng,Guoliang Cao,Wenping Huang,Mingyang Yang,Jianxiong Li,Tianchao Xu,Jiuming Guo,Ming Zhou
Treating bacteria-contaminated immiscible oily water remains challenging because oil/water separation and antibacterial activity are rarely integrated within one stable interface. Here, we report a polymerizable deep eutectic solvent (PDES)-derived coating that creates a charged ionic hydrated interface on stainless-steel mesh (PAA–ChClM). The PAA–ChClM is superhydrophilic/underwater superoleophobic, showing an underwater oil contact angle of 152° and ultralow oil adhesion. It enables gravity-driven separation of immiscible oil/water mixtures with a high flux of 7.6 × 10 4 L·m −2 ·h −1 and 99.95% separation efficiency, while maintaining performance under acidic, alkaline, saline, and long-term cycling conditions. More importantly, the interface is non-leaching and rapidly kills both Escherichia coli and Staphylococcus aureus within 5 s upon contact. The antibacterial activity originates from direct interaction between the charged ionic hydrated interface and the bacterial envelope, leading to membrane disruption, leakage, and collapse. Multilayer assembly further converts this contact-killing surface into a dynamic filtration platform, achieving near-complete disinfection in flow-through operation and effective treatment of natural lake water. This work establishes a PDES-derived ionic hydrated interface as a practical strategy for unifying anti-oil fouling, oil/water separation, and non-leaching antibacterial activity.
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Journal of Environmental Chemical Engineering
·
2026
·
IF 7.5
Meng Wu,Hongfeng Lu,Wenjun Lin,Jun Hu,Zhiliang Yu,Jianming Yu
Volatile organic compounds (VOCs) are important precursors of ozone and secondary organic particulate matter, with an extensive range of sources and complex composition. Dichloromethane (DCM) and n -hexane, as common and typical VOCs, are extensively applied as solvents, extractants and cleaning agents in the pharmaceutical and chemical industries. The persistence, teratogenicity and carcinogenicity seriously harm the ecological environment and human health. In this study, combining the advantages of microbial electrolytic cell (MEC), the detoxification mechanism between low concentration n -hexane and DCM was analyzed. The results demonstrated that the n -hexane favored the enrichment of key functional genera, including degrading and electroactive microorganisms, which could be attributed to the mild toxicity of n -hexane at low concentrations and sufficient carbon sources. In contrast, DCM significantly inhibited the degradation of n -hexane. Metagenomic annotation results suggested that DCM was converted to formaldehyde via hydrolyzing haloalkane dehalogenase (DhlA) or DCM dehalogenase (DcmA). Formaldehyde was partly oxidized to carbon dioxide (CO 2 ) and partly assimilated into the ribulose monophosphate pathway or the serine pathway. And then converted to acetyl-CoA to enter the TCA cycle, which provided energy and material cycles for microbial metabolism. These results provided a new method for the detoxification of mixed VOCs and offer a new insight into the treatment and disposal of pollutants in practical engineering applications.
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ATMOSPHERIC ENVIRONMENT
·
2026
·
IF 3.8
Jin Zhang,Jianze Zhang,Yifan Qiao,Xinxing Zhang,Yifan Meng
Direct capture of carbon dioxide (CO 2 ) by organic amines is often inefficient in bulk aqueous solutions under mild conditions, whereas microdroplets provide a unique gas-water interfacial environment that enables the transformation. However, whether CO 2 capture occurs from the gas side or the water side of the microdroplet interface remains unclear. Here we show that amines capture CO 2 predominantly on water microdroplets to form carbamates, suggesting that the gas–water interface plays a key role in this process. In the presence of dipropylamine vapor, spraying water microdroplets generates a carbamate anion which is directly detected by mass spectrometry (MS) and tandem mass spectrometry (MS 2 ). Control experiments show that removing dissolved CO 2 from water has little effect on product formation, whereas replacing the surrounding gaseous CO 2 with N 2 strongly suppresses the carbamate signal. These results indicate that CO 2 capture occurs predominantly from the gas side rather than from the water side of the gas–water interface. Comparison of vapor-phase amine and dissolved amine conditions shows that the carbamate formation occurs more readily when the amine is introduced from the gas side of the gas–water interface. Water microdroplets are also found to be more effective than other organic solvents, demonstrating that water provides a unique interfacial environment for efficient CO 2 -capture and stabilization of the product. Primary and secondary amines give analogous products, whereas a tertiary amine does not, further supporting carbamate formation. This work suggests a directional role of the gas–water interface in amine-mediated CO 2 capture and provides preliminary mechanistic insight into gas uptake at microscopic aqueous interfaces.
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Insect Science
·
2026
·
IF 3.7
Honglei He,Feng Lan,Bei Zhang,Tianzi Gu,Jianyang Bai,Qing-He Zhang,Jacob D. Wickham,Longwa Zhang
The olfactory system is pivotal for insects to detect external chemical signals and regulate essential life processes. Dendroctonus valens , an invasive forest pest, displays strong chemotaxis toward the plant kairomone (+)-3-carene. To unravel the molecular mechanism underlying olfactory recognition, we identified 28 odorant-binding proteins (OBPs) from D. valens via transcriptome sequencing and identified DvalOBP6 and DvalOBP18 as potential key candidates for this host kairomone component using qRT-PCR. Tissue expression analysis revealed that these two Minus-C OBPs are predominantly expressed in olfactory-related tissues (antennae, legs, and wings) with distinct sexual dimorphism. Homology modeling and molecular docking showed that both proteins adopt a typical six- α -helix fold, and bind (+)-3-carene primarily via hydrophobic interactions with binding energies of −5.53 kcal/mol and −4.96 kcal/mol, respectively. RNA interference of DvalOBP6 or DvalOBP18 significantly abolished the olfactory preference of D. valens adults for (+)-3-carene. Collectively, our findings demonstrate that DvalOBP6 and DvalOBP18 play critical roles in (+)-3-carene perception, providing a theoretical basis for the development of green pest control technologies targeting insect olfactory communication.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124356
·
IF 7.5
Meng Xu,Simin He,Yu Wang,Lang Wei,Jinying Wang,Ruibin Guo,Nijuan Liu,Zunli Mo
With the increasing frequency of oily industrial wastewater discharges and offshore oil spills worldwide, developing multifunctional materials that combine efficient oil–water separation with antimicrobial activity has become a key challenge for addressing water pollution and microbiological safety. Although conventional oil-water separation materials can achieve high separation efficiency, they typically suffer from severe chemical corrosion, poor cycling stability, and microbial adhesion, which limit their applicability in complex contaminated environments. In this study, willow-leaf-like Cu-BDC was first grown in situ on porous copper foam to impart intrinsic antibacterial functionality to the substrate. Subsequently, a hydrophobic-oleophilic surface was engineered using polydimethylsiloxane (PDMS), silica (SiO 2 ), and polyphenylene sulfide (PPS), achieving synergistic optimization of oil-water separation and antimicrobial performance. The results demonstrate that the superhydrophobic antibacterial foam (PDMS@CF-BDC) exhibits excellent oil–water separation performance, achieving separation efficiencies above 99% for various oil–water mixtures, including toluene and chloroform, and maintaining good stability over repeated separation cycles. Moreover, PDMS@CF-BDC shows satisfactory resistance to abrasion and corrosion. Antibacterial tests indicate that Cu 2+ released from PDMS@CF-BDC effectively suppresses the growth and proliferation of Staphylococcus aureus and Escherichia coli, conferring pronounced antimicrobial activity. Furthermore, by integrating interfacial engineering with a functional coupling strategy, the antibacterial and superhydrophobic mechanisms were synergistically combined, enabling PDMS@CF-BDC to effectively inhibit the adhesion of both bacteria and Chlorella. Notably, during several days of algal adhesion tests, PDMS@CF-BDC still maintained efficient oil-water separation performance, providing a new route for the development of efficient, durable and multifunctional separation materials.
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