JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Yuanping Fang,Congli Chen,Bin Cui,Dandan Zhou
The frequent occurrence of antibiotics in reclaimed water is concerning, in the case of managed aquifer recharge (MAR), it inevitably hinders further water purification and accelerates the evolutionary resistance in indigenous bacteria. In this study, we constructed two column reactors and nanoscale zero-valent iron (nZVI) amendment was applied for its effects on water quality variation, microbial community succession, and antibiotic resistance genes (ARGs) dissemination, deciphered the underlying mechanism of resistance risk reduction. Results showed that nZVI was oxidized to iron oxides in the sediment column, and total effluent iron concentration was within permissible limits. nZVI enhanced NO 3 - -N removal by 15.5% through enriching denitrifying bacteria and genes, whereas made no effects on oxacillin (OXA) removal. In addition, nZVI exhibited a pivotal impact on ARGs and plasmids decreasing. Network analysis elucidated that the diversity and richness of ARG host declined with nZVI amendment. Denitrifying bacteria play a key role in suppressing horizontal gene transfer (HGT). The underlying mechanisms of inhibited HGT included the downregulated SOS response, the inhibited Type-Ⅳ secretion system and the weakened driving force. This study afforded vital insights into ARG spread control, providing a reference for future applications of nZVI in MAR.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 48
·22869-22875
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IF 3.591
Bingyan Han,Jingmei Jiang,Qifang Yan,Jing Zhao,Ze Xin,Qin Yan,Gaohong He
Carbon dots (CDs) have been studied for years as one of the most promising fluorescent nanomaterials. Herein, fluorescent CDs excited by visible light emitted red fluorescence with a quantum yield of 32.8% via a facile hydrothermal treatment. In addition to being applied in cell imaging, the as-prepared CDs were also utilized in the detection of ammonia and formaldehyde in aqueous solutions because of their pH-dependent properties, with a low limit of detection of 3.7 nM and 44 μM, respectively. Furthermore, we synthesized flexible and transparent fluorescence films by mixing the as-prepared CDs and PVB powder, which can be utilized to directly detect ammonia gas under visible light according to significant colour changes. Therefore, the as-prepared CDs would have more prominent and influential application in clinical diagnostics and environmental analysis.
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CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Qinghui Wang,Bin Li,Hongyan Cao,Xubao Jiang,Xiang Zheng Kong
Luminescent materials, particularly those with tunable wavelengths, are gaining considerable attention owing to their advanced applications in optoelectronic devices, fluorescent probes and sensors etc. Among all species studied, luminogens without typical chromophores have been gaining increasing attention. The related studies have been mainly focused on polymers with functional groups, such as aliphatic tertiary amine, carbonyl, ester, hydroxyl, amide, imide etc. Here we report a new type of nonconventional fluorescent emitter, fully water-soluble aliphatic amide salt. By simply blending methanol solution of ethylene diamine with that of succinic acid, the aliphatic amide salt (PA24S) was precipitated out, and identified through a series of advanced testing. Both the salt PA24S and its corresponding polyamide showed fluorescent emission as solid powders and in their solutions. The emission behavior of PA24S was studied with regard to concentration, pH, temperature and non-solvent fraction. It was concluded that the emission was owing to the formation of molecule clusters, and confirmed by UV–vis absorption, cluster size measurement and NMR test. It was also demonstrated that Cu 2+ was an effective quenching agent with good selectivity. The cytotoxicity assay demonstrated that PA24S was non-toxic to HeLa cell, and suitable for cell imaging. Combined with selective quenching of Cu 2+ , PA24S is successfully used for Cu 2+ detection and monitoring. This work provides therefore a novel type of luminogen of great potential applications in biological fields, featured by its easiness to make, high water solubility and broad emission in dilute solution and at solid state.
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APPLIED CATALYSIS A-GENERAL
·
2023
·
IF 5.5
Mingyu Cui,Linyang Dong,Zhen Shen,Tiantian Guo,Wei Zhao,Chong Liang,Xutang Liu,Dingkai Wang,Fei Wang,Zhijie Jiang,Shuiyuan Fu
Spinel ferrite has been widely applied in the field of catalytic oxidation with its high selectivity, magnetic separation, and strong chemical stability. In this work, a series of porous carbon supported Co doping spinel copper ferrite (Cu x Co 1- x Fe 2 O 4 @ PC) were prepared via impregnation method for the catalytic oxidation of vanillyl alcohol (VAL) to vanillin (VN). The optimized Cu 0.4 Co 0.6 Fe 2 O 4 @PC exhibited a nanoparticle morphology with mesoporous structure and BET surface area of 553.3 m 2 ·g −1 . Results showed that the conversion of VAL ( C VAL ) can reach to 96 % with 81 % of VN selectivity ( S VN ) in the presence of Cu 0.4 Co 0.6 Fe 2 O 4 @PC at 80 °C for 40 min. Reusability experiment displayed that the C VAL (89 %) and S VN (79 %) can still achieve 92.3 % and 96.6 % of the initial ones after being used for 3 times. Furthermore, a possible pathway for the oxidation of VAL via·OH and·O 2 - active substances was also proposed. The work presents a supported doping spinel with enhanced VAL oxidation performance, which may be expected to apply in the field of selective catalysis.
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MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Xueying Song,Xiaohao Zhang,Xunwen Su,Xiao Liang,Yangcan Lv,Jiawen Xu,Na Yi
Tunable WO₃ microstructures are achieved via solvothermal synthesis. • Ultra-fast response (1 s) and low detection limit (52 ppb) toward xylene. • Synergistic mechanism of size effect, active facets and oxygen vacancies. • Low-power indoor xylene real-time monitoring prototype. As a common indoor aromatic volatile organic pollutant, accurate and sensitive monitoring of xylene is essential for residential health protection. In this work, monoclinic WO 3 materials with tunable microstructures were synthesized via a solvothermal synthesis by adjusting the water/ethanol solvent ratio. The regulation effect of solvent composition on crystal facet exposure, defect content and morphology of the materials was systematically analyzed. The gas sensing measurements reveal that the hierarchical flower-like WO 3 microsphere sensor (synthesized at water/ethanol = 2:1) exhibits a response of 25.9 toward 100 ppm xylene at 220 °C, which is 3-fold higher than that of the sensor fabricated with pure water as the solvent. It also features 1 s ultrafast response, excellent selectivity, 30-day long-term stability, and a 52 ppb detection limit. The superior performance originates from the combined contributions of the nanosheet size effect, efficient gas diffusion pathways of the hierarchical architecture, and abundant surface active sites. The portable early warning system developed with this material enables real-time indoor xylene monitoring, providing a new strategy for high-performance gas sensing material design. The WO 3 -2 sensor exhibits an ultrafast response of 1 s and a recovery time of 47 s toward xylene, with a response of 4.5 at 1 ppm and a calculated limit of detection (LOD) as low as 52 ppb. The xylene detection prototype developed based on this sensor enables real-time concentration monitoring and multi-gradient alarm of target gas in indoor scenarios, providing a practical solution for on-site xylene detection in confined spaces such as homes. Download: Download high-res image (99KB) Download: Download full-size image
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ACS Catalysis
·
2026
·
IF 13.6
Zhen Wang,Lei Ying,Weibin Xu,Chuande Huang,Beien Zhu,Baolin Hou,Jian Lin,Yi Gao,Xiaodong Wang,Tao Zhang
Abstract Engineering the electronic and spin states of active centers for promoted oxygenate production from methane remains a fundamental challenge in catalysis. Herein, we demonstrate that spin crossover of Fe1 single-atoms from high spin (HS) to low spin (LS) could boost the oxygenate yield by 5.3-fold. The spin transition is realized by coordinating Fe1 sites with strong-field ligand carbon monoxide (CO). Compared with traditional L-FeHS-O (L = H2O) motifs, low-spin L-FeLS-O (L = CO) with CO coordination introduces unoccupied O 2p states near the Fermi level and increases electron density on the oxygen center. The resulting enhancement in electrophilicity of the oxo center facilitates hydrogen abstraction from methane, lowering the C−H activation barrier from 1.26 eV to 0.65 eV. Consequently, an oxygenate productivity of 1615.3 mmol gFe−1 h−1 with ∼100% selectivity is achieved at 30 °C. The strategy of spin regulation paves an avenue for designing prospective single-atom catalysts toward efficient methane valorization.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 6
·125103
·
IF 7.5
Guangxiang He,Jinglin Zhu,Fan Xu,Shaohong Fu,Haodong Yu,Zhigang Li
FeCe@Cement is prepared by cement granulation of fly ash cenospheres. • Rate constant of BTA degradation in FeCe@Cement/O 3 is 3.35 times than O 3 alone. • FeCe bimetal promotes the generation of •OH, O 2 •− , and 1 O 2 as primary ROS. • FeCe@Cement shows a superior stability and reusability. Developing highly efficient and stable millimeter-scale ozone (O 3 ) catalysts is urgent yet challenging endeavor. Herein, a novel FeCe bimetallic cement-based catalyst (FeCe@Cement) was fabricated from fly ash cenospheres and cement, which achieves near-complete degradation of 1H-benzotriazole (BTA) within 9 min under optimal conditions, with an apparent rate constant (0.77 min −1 ) 3.35 times that of O 3 alone. The introduction of FeCe bimetal synergistically boosts the generation of hydroxyl radical (•OH), superoxide (O 2 •− ) and single oxygen ( 1 O 2 ), collectively dominating BTA oxidation. Notably, FeCe@Cement exhibits good catalytic stability and low metal leaching, maintaining high activity after five cycles of repeated experiments. In actual wastewater treatment, the FeCe@Cement/O 3 system achieved a chemical oxygen demand (COD) removal efficiency of up to 75%, which is much higher than the commercial O 3 catalytic materials. The finding advances the design of cost-effective, scalable cement-based catalytic materials, offering both mechanistic insights into reactive oxygen species (ROS) promotion and a practical pathway for refractory pollutant abatement. Download: Download high-res image (135KB) Download: Download full-size image
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Journal of Energy Storage
·
2023
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IF 9.4
Mingming Zhang,Weiqiang Zhou,Danqin Li,Zian Huang,Xueqian Zhao,Yize Li,Xiaojing Hao,Jingkun Xu
The low energy density of supercapacitors (SCs) is one of the main factors restricting their development. WO 3 with high theoretical capacitance is an ideal n-type material for anode electrode, but its narrow potential window and low conductivity are not conducive to the application of high-energy-density SCs. Herein, a high electrochemical activity poly(indole-5-carboxylic acid) (P5-ICA) as p-type material wrapping n-type oxygen vacancies WO 3 vertically nanowire arrays supported on carbon cloth is prepared by hydrothermal method and subsequent electrodeposition method. This adhesive free flexible p/n-type hetero-structural P5-ICA@WO 3 vertical nanowire array electrode has a three-dimensional porous nanostructure that not only provides a large surface area, but also promotes the penetration of electrolyte ions and the transmission of electrons. It is found that the P5-ICA@WO 3 nanowire array with high areal specific capacitance (1430 mF cm −2 at 4 mA cm −2 ) and long cycle stability (94 % after 6000 cycles) exhibits a widened electrochemical activity window compared to individual material. The symmetrical SCs assembled using P5-ICA@WO 3 can provide a high areal energy density of 137.6 μWh cm −2 at the power density of 1.4 mW cm −2 , which is significantly higher than the SCs performance of previously used WO 3 -based electrode materials.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
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IF 8.6
Xu Yin,Wei Li,Hongwei Zhu,Jiatian Yu,Kajia Wei,Zhifeng Gao,Yonghao Zhang,Haoming Chen,Liankai Gu,Weiqing Han
With the wide application of reverse osmosis technology in municipal wastewater treatment, the abundance of generated reverse osmosis concentrates (ROC) has become a significant challenge for water ecosystems. In this work, a fabricated TiO 2 -BNTs/SnO 2 -Sb reactive electrochemical membrane (REM) was used to dispose of municipal ROC wastewater. The effects of the TiO 2 nanotube array (TiO 2 -BNTs) interlayer, current density, initial pH and flow rate on the COD removal of ROC were investigated. In addition, the 3D-EEM fluorescence spectra showed that humic acid-like substances and soluble microbial byproduct-like substances could be removed effectively. GC-MS analysis indicated that most organics, including aldehydes, phenols, ethers, nitriles, ketones, silanes and alcohols, were eliminated after treatment. The REM also exhibited prominent membrane anti-fouling performance in high-salinity wastewater. After 20 cycles, the transmembrane pressure (TMP) was only slightly changed (within 3 kPa) compared to that of the first cycle. Two key parameters, i.e., service lifetime and energy consumption, were investigated in ROC treatment. The service lifetime reached 31350 h (3.5 years, 20 mA cm −2 ) in 0.5 M NaCl solution and 40390 h (20 mA cm −2 , 4.6 years) in actual wastewater, which is highly competitive with previously reported electrodes. Energy consumption reached 10.5 kWh·kg COD −1 in actual ROC wastewater, which is more acceptable compared with current reported electrochemical technologies and exhibits great application prospects for TiO 2 -BNTs/SnO 2 -Sb REMs.
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Journal of Cleaner Production
·
2023
·
IF 11.1
Simin Wang,Min Liu,Wuxia Ge,Can Jin,Wentao Bi
In this study, the efficient extraction of lignin from wood meal using a deep eutectic system (DESys) was explored, and the obtained lignin was characterized. The impact of various factors, such as the type of DESys components, extraction time, temperature, water content, and solid-liquid ratio, on the lignin extraction process was systematically investigated. The results indicated that a DESys with a carboxylic acid as the HBD provided the highest lignin extraction efficiency. The obtained lignin was characterized in terms of its molecular weight distribution, elemental composition , functional groups, crystalline structure, and thermal stability. The results showed that the lignin obtained by DESys-based extraction had similar properties to lignin extracted using traditional method. Additionally, the study examined the utilization of the residue left after lignin extraction for the adsorption of cationic pollutants, such as the cationic dye neutral red (NR). The residue was found to contain carboxyl groups , which enabled it to adsorb NR efficiently. The kinetic and thermodynamic models suggested that the adsorption was a chemisorption process. Furthermore, the residue showed selective adsorption for cationic dye over anionic dye. This selectivity was attributed to interactions between the residue's functional groups and the cationic dye molecule. Overall, this study provided a sustainable and comprehensive approach to lignin extraction from lignocellulosic biomass using DESys. It also demonstrated the potential of using the residue from the extraction process for the removal of cationic pollutants from wastewater, showcasing a multi-faceted approach to the valorization of lignocellulosic materials .
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jiabo Wang,Peng Zhang,Yalin Fu,Jie Zhang,Zhentao Liu,Baolei Liu,Jibo Zhang,Li Chen
Molybdenum carbide (Mo 2 C) has gained significant recognition as a cutting-edge, non-precious transition metal catalysts for efficiently driving the hydrogen evolution reaction (HER). However, the desorption of Mo-H bonds on the pristine Mo 2 C surface are difficult, resulting in a slow Heyrovsky/Tafel step. Herein, biphasic Mo 2 C/Mo 16 N 7 nitrogen doped carbon nanorods (Mo 2 C/Mo 16 N 7 @NRs) is synthesized as the high-performance HER electrocatalyst by using a one-step in-situ pyrolysis growth method. It is found that a suitable pyrolysis temperature can simultaneously tune the morphology of the catalyst and form abundant heterointerface. Benefit from abundant porous nanostructure and more electron-rich Mo active sites at the Mo 2 C-Mo 16 N 7 interfaces, the optimized Mo 2 C/Mo 16 N 7 @NRs demonstrates exceptional catalytic activity. It achieves low overpotentials ( η 10 ) of 63.62 and 117.43 mV at 10 mA cm −2 , accompanied by Tafel scopes of 49.73 and 64.44 mV dec −1 in both alkaline and acidic electrolytes. Also, Mo 2 C/Mo 16 N 7 @NRs shows long-lasting stability for 24 h in the different electrolytes. The experimental and theoretical findings explain the synergistic effects of unique morphology control and interface engineering on electrocatalyst activity. The one-step in-situ pyrolysis growth method is expected to produce non-precious metal catalysts with distinct morphology and heterointerfaces.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Xiaomei Ning,Liang Zhan,Xiaosong Zhou,Jin Luo,Yanli Wang
The performances of glycerol electro-oxidation reaction (GOR) and formic acid electro-oxidation reaction (FAOR) catalyzed by Pt catalyst were dramatically improved by adding Bi 3+ into the reaction solution. The dynamic structure and microenvironment of in-situ Bi-modified Pt and their impact on the catalytic performances were revealed. A strong correlation was established between the Bi coverage of Pt-based catalysts and their resistance to CO poisoning and performance in GOR and FAOR. When Bi 3+ increased to a certain amount, a Bi-shell containing hydroxides was formed on Pt surfaces except the formation of Pt-Bi ensemble. On Pt catalyst covered with 43.9 % Bi, the peak mass-specific activities of GOR and FAOR in forward scans were 4.2 and 34.7 times that of Pt/NCNTs, respectively. The peak electrochemical active surface area (ECSA)-specific activity of FAOR in forward scan for Pt with 52.6 % Bi coverage was 80.6 times that of Pt/NCNTs. The dehydrogenation process in FAOR and the 4-electron pathway in GOR were improved for Bi-modified Pt. The experimental results and DFT calculations indicated that the positively charged Bi and structure of Pt-Bi ensemble improved the adsorption and interaction of negatively charged intermediates, and the enhanced hydroxides facilitated the oxidation and removal of toxic intermediates, such as CO.
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危险品化学品经营许可证（带存储）