JOURNAL OF POROUS MATERIALS
·
2025
·
IF 3.2
Dai Xiaojun,Cheng Yan,Wei Qiang,Zhou Yasong
In the petrochemical industry, a significant method of achieving high-value usage of polycyclic aromatic hydrocarbons in light cycle oil is the moderate hydrocracking of these hydrocarbons into C 6 -C 8 chemical raw materials. In order to prepare NiW-S supported catalysts, the impregnation technique was used to modify the small-crystal Y zeolites with P. The catalytic performance of the catalysts was assessed using naphthalene as the model chemical. The physicochemical characteristics of the catalysts and P-modified Y zeolites were examined in relation to the impacts of P modification. The results show that the introduction of P has a negative effect on the structural characteristics and acidity of Y zeolite, and this negative effect increases with the increase of P content. The introduction of P reduces the reduction temperature of the active metal of the catalyst and improves the reducibility of the active metal of the catalyst. Adding appropriate P species enhances the active phase characteristics of the corresponding Ni-W-S supported catalysts while weakening the metal-support interactions of the corresponding Ni-W-S supported catalysts. However, too much P species has a negative effect on the active phase characteristics of the catalysts. Naphthalene conversion and C 6 -C 8 selectivity were shown to be significantly influenced by the synergistic catalysis of acid sites and metal sites of the catalysts. The catalyst based on 2% P modified Y zeolite exhibited the best selectivity of C 6 -C 8 compounds. The yield of C 6 -C 8 of 2% P modified Y zeolite-based catalyst increased by 22.34% when compared to the unmodified catalyst. It is anticipated to serve as a guide for the high-value use of polycyclic aromatic hydrocarbons in light cycle oil in petrochemical industry.
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CHIRALITY
·
2025
·Vol. 37
·期 11
·e70060
·
IF 3
Shuling Dong,Jiayi Sun,Fan Ding,Ji Wu,Ronghua Fan,Li Zhou
In this work, a new strategy was proposed for the preparation of a chiral stationary phase based on β-cyclodextrin and calix[4]arene polymer. The chiral stationary phase was characterized by scanning electron microscopy, energy dispersive x-ray spectroscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The introduction of calix[4]arene polymer increased chirality recognition by increasing recognition sites and interactions, including hydrogen bonding, π–π interaction and synergistic inclusion effect. Compared with the home-made β-cyclodextrin–based chiral column, the prepared β-cyclodextrin–calix[4]arene polymer-based chiral column showed superior enantioseparation performance toward 1-phenylethanol, prothioconazole, promethazine, propranolol, and bisoprolol. These chiral compounds can be separated within 10 min under reversed-phase mode with resolutions ranging from 1.62 to 1.80. These findings will provide an important reference for developing novel supramolecule-based chiral stationary phases.
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CARBON
·
2024
·
IF 10.5
Fengqin Shang,Yang Sun,Zihan Yan,Jiayu Yao,Ruirui Yang,Yingjia Hu,Bingheng Chen,Hangyan Shen
In this study, a simple and rapid method for the preparation of Nitrogen-doped carbon nanospheres (N–CNOs) was proposed. N–CNOs were successfully prepared by microwave heating the mixture of naphthalene, melamine, and carbon fibers for 2 min, which showed a nearly spherical morphology with a multi-layer onion-like structure, and the average diameter was 197 nm. Compared with CNOs, the coefficient of friction (COF) of N–CNOs decreased from 0.36 to 0.31 and the wear rate decreased from 1.03 × 10 −5 to 0.83 × 10 −5 mm³/(N·m), which decreased by 14 % and 19 %, respectively. When the N–CNOs concentration increased from 4.0 wt% to 16.0 wt%, the COF and wear rate of N–CNOs reached the minimum (0.22 and 0.53 × 10 −5 mm 3 /(N·m)), respectively. The excellent tribological properties of N–CNOs were attributed to the increase of interlayer spacing (0.07 nm) and the atomic scale lattice mismatch, both of which weakened interlayer interactions, thereby improving lubrication performance and reducing friction. This study not only proposed a new preparation method for N–CNOs, but also revealed the lubrication mechanism at the atomic scale, providing a technical support for their application in the field of lubrication.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiao Chen,Nannan Zhang,Huaming Wang,Ying Zhong,Tianming Lv,Changhai Liang
The continuous flow selective hydrogenation of maleic anhydride (MA) to γ-butyrolactone (GBL) over highly efficient and long-term stable catalysts is a considerable promising strategy for both lab-scale as well as industrial application. In this work, a PtPdCoNiCu/TiO 2 high-entropy alloy (HEA) catalyst is developed by the colloidal impregnation method, in which the HEA colloids are synthesized by lithium naphthalenide-driven reduction at mild conditions according to the redox potential of the various metals. The PtPdCoNiCu/TiO 2 catalyst exhibits highly efficient in the hydrogenation of MA with 91 % selectivity to GBL at full conversion of MA under the weighted hourly space velocity of 1.14 h −1 , 3 MPa H 2 , and 260 °C. Due to the present of oxygen vacancy in the TiO 2 support and the hydrogen spillover, the PtPdCoNiCu/TiO 2 HEA catalyst presents a low apparent activation energy (75 kJ mol −1 ), boosting the hydrogenolysis of C=O bonds for generating of GBL. The cocktail effect is presented in the PtPdCoNiCu/TiO 2 catalyst, and its catalytic activity is much better than that of corresponding monometallic and bimetallic catalysts. It realizes the reduction and substitution of precious metal catalysts. In addition, the PtPdCoNiCu/TiO 2 catalyst with sintering resistance and acid resistance shows excellent long-term stability within 132 h. This work is of great significance for understanding HEA catalysis at the atomic level and provides the possibility for developing low-cost and efficient precious metal industrial catalysts.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Gankai Huang,Xinyi Huang,Junlin Huang,Xuye Hou,Youquan Zhang,Fang Lai,Ronghui Lin,Kangquan He,Qunhua Long,Hongbing Ji,Kungang Chai
Efficient purification of xylene isomers, particularly the separation of para- / meta -xylenes (PX/MX), is industrially crucial but challenging. Here, we report a classical aluminum-based metal–organic framework (MIL-160) that exhibits an exceptional meta-selectivity in liquid-phase competitive adsorption of xylene isomers. The outstanding separation performance of MIL-160 for xylene isomers is confirmed by dynamic breakthrough experiments. The PX eluted first and breakthrough of MX didn’t occur until a long retention times, which is in accordance with the results observed from static adsorption experiment. Molecular simulations and calculations suggested that the largest affinity of MIL-160 toward MX, potentially due to the good fitness between the 1D square-shaped channel and MX. To improve the productivity of purified PX in continuous separation mode, we speculated that combining the MX-selective property of MIL-160 and the previously reported ortho -xylene (OX)-selective property of CAU-23 can enhance the separation effect between PX and the other two isomers. So, MIL-160 and CAU-23 were filled simultaneously in column and the effect of mass ratio of them on PX productivity was investigated. The results indicated that when the mass ratio of MIL-160 versus CAU-23 was 4:6, MX and OX almost simultaneously eluted and reached saturation, which can maximize the productivity of PX. This study offers a feasible strategy for isolating PX from xylene isomer with low energy consumption and high efficiency.
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Journal of Water Process Engineering
·
2025
·
IF 6.7
Xianxian Sheng,Meesam Ali,Ruoxuan Xu,Mudassir Habib,Xiang Zhang,Qian Sui,Rongbing Fu,Shuguang Lyu
Mackinawite (FeS) is a promising catalyst for advanced oxidation processes (AOPs), but its role in activating sodium percarbonate (SPC)-dominated oxidation remains unclear. Herein, citric acid (CA) was introduced as a synergistic agent to enhance FeS activation of SPC, demonstrating that SPC/FeS and SPC/CA systems hardly removed 6.8 % and 7.6 % of fluoranthene (FLT), respectively, while SPC/FeS/CA process achieved a significant 96.2 % FLT degradation. Reactive oxygen species (ROS) analysis identified HO and O 2 − as the dominant contributors to FLT degradation. X-ray photoelectron spectroscopy (XPS) confirmed that S(-II) facilitated the Fe(III)/Fe(II) redox cycle, ensuring prolonged FLT degradation, which was further confirmed through Na 2 S experiments. GC–MS identified benzoic acid (BA) and phthalic acid (PA) as degradation intermediates with reduced toxicity than FLT, highlighting the environmental safety of the proposed technique. SPC/FeS/CA system effectively mitigated the inhibitory effects of neutral to weakly alkaline pH conditions (8.0–10.0) and achieved significant FLT degradation (60.7 %) even at pH 11.0. In soil slurry experiments, the process removed 80 % of FLT within 12 h. The system effectively degraded other polycyclic aromatic hydrocarbons (PAHs), including naphthalene and phenanthrene, demonstrating its broad applicability for remediating PAHs-contaminated environments. This study introduces a novel SPC-dominated AOP strategy, leveraging FeS as a robust catalyst, and offers valuable insights for advancing efficient PAHs remediation technologies.
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Small
·
2025
·
IF 12.1
Xu Wang,Yong Yan,Huan Zhou,Xinyu Liu,Riyi Zhang,Dong Wang,Peter Schaaf,Guangsheng Guo,Xiayan Wang
Polycyclic aromatic hydrocarbons (PAHs) and organophosphorus pesticides (OPPs) are typical pollutants characterized by a wide variety of types, difficulty in degradation, and significant differences in mutagenic and carcinogenic toxicity. However, due to their distinct physicochemical properties, it remains challenging to simultaneously analyze PAHs and OPPs under real environmental conditions within the same simplified detection systems and accurately assess their oxidation-reduction processes. In this study, electrochemical surface-enhanced Raman scattering (EC-SERS), utilizing a microfluidic chip of self-made 3D nanoporous Au loaded with Ag nanoparticles, is employed to analyze PAHs and OPPs in the environment and investigate their oxidation-reduction processes, which displayed excellent sensitivity and selectivity. The chip successfully analyzed three types of PAHs and four types of OPPs, achieving the lowest detection limit of 0.01 ppb, and strong linearity within a certain range. The recovery in real water samples reached 102.89% with a relative standard deviation (RSD) of 13.36%. Furthermore, this system successfully identified different types of pollutants and their concentrations in mixed samples with high accuracy. Meanwhile, preliminary insights into the electrochemical oxidation and degradation processes of these pollutants are provided, offering a first understanding of their transformation mechanisms.
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高影响因子
Toxics
·
2024
·Vol. 12
·期 11
·796
·
IF 3.9
Xintong Li,Baocheng Qu,Jingyao Wang,Hongxia Zhao
Environmentally persistent free radicals (EPFRs) generated on particles under irradiation in water have attracted particular attention, and their formation mechanisms are not well understood. This study investigated the photoformation of EPFRs on both actual samples collected from an oil production plant in Panjin, Liaoning, China, and simulated Fe(III)-montmorillonite samples in water. The EPFRs detected on actual samples were not easily generated compared with those in the soil or in the air, based on the concentrations of identified PAHs. EPR signals in the range of 1017to 1018spin/g were detected on the simulated Fe(III)-montmorillonite samples. Their g factors were smaller than 2.0030, which indicated the generation of carbon-centered EPFRs. The primary byproducts were identified by chromatography–mass spectrometry (GC-MS), and a possible EPFR formation pathway during PAH degradation was proposed. Hydrogenation of PAHs during the photoformation of EPFRs was observed and might be due to the catalysis of the simulated particles and the interaction of the intermediates. Meanwhile, the effects of the typical anions (NO2−and Cl−) and the surfactant (TWEEN®80 and sodium dodecyl sulfate) were investigated and indicated that the phototransformation process and adsorption process would affect the formation of EPFRs. Overall, our study provided useful information to understand the photoformation of EPFRs in aqueous environments.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Zi-hui Ma,Tao Yang,Yan Song,Xiao-dong Tian,Zheng-yang Liu,Xiang-jie Gong,Zhan-jun Liu
Hyper cross-linked polymers (HCPs), as a key precursor of hard carbon (HC) anode materials, stand out because of their capacity for molecular-scale structural design and comparatively straightforward preparation techniques, which are not seen in other porous materials synthesized procedure. A novel synthesis method of HCPs is developed in this paper, which is through the incorporation of functional macromolecules , the structural control and heteroatom doping of the product has been achieved, thus augmenting its electrochemical performance in batteries. In this work, carbonized tetraphenylporphyrin zinc (TPP-Zn) doped HCP-based hard carbon (CTHCP) with stable structure was prepared by Friedel-Crafts reaction and carbonization by using naphthalene and trace TPP-Zn as monomers, dimethoxybenzene (DMB) as crosslinking agent and FeCl 3 as catalyst. The introduction of TPP-Zn, a functional macromolecule with unique two-dimensional structure, realized the pore structure regulation and N doping of the raw carbonized HCP-based hard carbon (CHCP). The results showed that CTHCP had higher mesoporous volume, N content and wider layer spacing than CHCP. In addition, CTHCP anode exhibited excellent Li + /Na + storage performance, initial reversible capacity, rate performance and long cycle life. More amount of N -containing (N-5) active sites and mesoporous content in CTHCP anode was the main reason for the improvement of Na + storage effect. While the increased interlayer spacing had a greater effect on the lithium storage capacity. This study uncovered the design rules of HC anode materials suitable for Li + /Na + batteries and provided a new idea for the preparation of high-performance HC anode materials.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Xue Ma,Mengmeng Fu,Kai Hu,Li Gao,Chenchen Song,Shusheng Zhang,Renyong Zhao,Wenjie Zhao
Developing efficient and reliable adsorbents with simplified synthesis and mixed-mode performance is crucial for the accurate quantitative analysis of diverse coexisting environmental pollutants. A magnetic carboxylated hypercrosslinked organic polymer (Fe 3 O 4 /HCP-COOH) with reverse phase/cation exchange mixed-mode performance was synthesized through a two-stage process: (1) Fabrication of HCP-COOH via FeCl 3 -catalyzed Friedel-Crafts alkylation using 1,4-phenylenediacetic acid and 1,4-bis(chloromethyl)benzene; (2) In situ growth of Fe 3 O 4 nanoparticles on HCP-COOH through coprecipitation, utilizing FeCl₃ dually as polymerization catalyst and iron precursor to enhance process efficiency and waste minimization. The nanocomposite functioned as a mixed-mode sorbent for magnetic solid-phase extraction (MSPE), integrating dual retention mechanisms to selectively extract hydrophobic polycyclic aromatic hydrocarbons (PAHs) and cationic quaternary ammonium pesticides (QUATs), with subsequent analysis by GC-MS for PAHs and HPLC-MS/MS for QUATs respectively. Following optimization of adsorption pH, eluent composition, and contact time, the method exhibited high sensitivity with limits of detection (LODs) of 0.80-7.93 ng L⁻¹ for 15 PAHs and 0.02-16.31 ng L⁻¹ for 4 QUATs. Validation showed satisfactory recoveries of 89.5-98.3% (RSDs ≤11.2%) in snowmelt and 90.4-101.8% (RSDs ≤11.6%) in lake water (n=3), confirming practicality for simultaneous monitoring of hydrophobic and cationic contaminants in complex environmental water, offering significant advantages in multi-residue analysis for environmental monitoring applications.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Yu Liu,Rong Peng,Ying Xu,Xiaoqiong Liu,Yi Song,Wenwei Liu,Wu Tianli,Junwei Zhang,Tao Li
Glycerol, as a renewable fuel with high energy density, has broad application prospects in green energy conversion.However, its electrocatalytic oxidation is limited by the activity and selectivity of catalysts, which severely restricts the efficient release of energy. In this work, we report a facile co-reduction synthesis of bimetallic Au-Ti nanoparticles featuring abundant Au-TiO x interfaces, which nearly doubled the mass activity for glycerol electrooxidation from 1.420 A mg Au -¹ to 2.717 A mg Au -¹, and presented an impressively high mass activity retention after the stability test. In situ attenuated total reflection surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) analysis confirms that Au-Ti alloy shows a deeper oxidation behaviour. Density functional theory (DFT) calculations further reveal that the formation of Au-TiO x interfaces gives rise to bifunctional synergistic sites, which facilitate the cooperative adsorption of glycerol and hydroxyl species, thereby overcoming the limitations of single-type active sites on Au/C. Meanwhile, CO adsorption further enhances the binding of hydroxyl groups, synergistically promoting deep oxidation of glycerol.
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FOOD HYDROCOLLOIDS
·
2025
·
IF 12.4
Si-Jie Wu,Qi-Bin Kuang,Ran Feng,Ran Meng,Qiu-Ya Ji,Han Tao,Bao-Cai Xu,Bao Zhang
Heat treatment, as one of the most common processing methods in protein modification, has unclear mechanisms affecting protein-polyphenol interactions. This study investigated the effects of sub-denaturing temperature pretreatment on protein structure-function relationships and their interactions with polyphenols using the quercetin-lactoferrin (Que-LF, QLF) system as a model. Results demonstrated that among 25-55 °C gradient heat treatments, LF pretreated at 40 °C (LF40) formed metastable aggregates through moderate structural unfolding, with significantly exposed hydrophobic cavities that enhanced binding affinity to Que ( K a =7.11×10 5 L/mol). Preheating optimized the conformational flexibility and spatial compatibility of LF binding pockets, enabling Que to embed into hydrophobic cavities via hydrophobic interactions ( ΔH = 23.82 kJ·mol -1 , ΔS = 188.27 J·mol -1 ·K -1 ) and multiple hydrogen bonding networks. The QLF40 complex exhibited optimal binding free energy (-85.1 kJ/mol) and conformational stability. Furthermore, Que binding synergistically improved thermal stability (2 °C increase in denaturation temperature) and antioxidant activity (64.7% DPPH and 98.4% ABTS scavenging rates) of the complex through masking hydrophobic sites, strengthening hydrogen bond networks, and inducing local structural rigidity. This study provides theoretical foundation for designing efficient active ingredient delivery systems based on controlled protein structural modification.
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