JOURNAL OF HAZARDOUS MATERIALS
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2025
·
IF 11.3
Xincheng Zhang,Changqing He,Muhmmad Youssef Muhmmad Mostafa,Waseem Akram,Lin He,Hong Sui,Xingang Li
Separation of oil-water emulsions co-stabilized by solid particles and natural interfacially-active components has always been a challenge in petroleum and coal industry. Herein, we constructed and synthesized an interfacially-active nonionic material by esterification and polymerization, which contains multiple oxygen-containing groups (-COOH, -C-O, -COOR) and aromatic rings. The lab bottle tests show that this polymer (1000 mg/L) could completely break the silica-asphaltene co-stabilized water-in-heavy oil emulsions at 60 °C within 45 min, much faster and higher than those of commercial and reported demulsifers (>75 °C, >90 min). Mechanistic study by interfacial characterization and molecular dynamics simulation shows that this newly synthesized polymer possesses multiple hydrogen bonding sites and delocalized π bonds. These functional groups and active sites play the vital role in reconstructing and breaking the interfacial film by non-covalent interactions reconstruction, repelling the coated heavy fractions (e.g., asphaltenes) from the fine solids surface. The introduction of aromatic rings with delocalized π bonds into the polymer provides it with a solubilizing effect on asphaltene and promotes the dispersion of asphaltene aggregation, enhancing the demulsification efficiency. In addition, these hydrogen bonding sites can also build connecting bridges between emulsified droplets, facilitating the coalescence of them. This work would provide insights for developing efficient functional materials for low-carbon separation of complex emulsions in industry, including oily sludges, water-in-oil emulsions.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Tingxu Zhou,Pingfan Zhang,Daqiang Zhu,Shasha Cheng,Hongjun Dong,Yun Wang,Guangbo Che,Yaling Niu,Ming Yan,Chunmei Li
The multi-part functionalization of the carbon nitride (CN) molecular skeleton usually induces synergies to boost the photocatalytic activity, but it is a challenging undertaking owing to the uncontrollability in preparation process. Herein, the dual embellished CN is achieved by substituting bridged N with C atoms and grafting conjugated heterocycle on the skeleton edge through facile one-step thermal polymerization. The synergistic effect of skeleton delocalization and edge induction is triggered by the delocalized π bonds from incorporated C atoms and electron-withdrawing function of conjugated heterocycle, which importantly promotes the charge mobility and electron directional migration from center to edge of CN skeleton. The resulted photocatalytic hydrogen evolution (PHE) performance is propelled dramatically and the apparent quantum efficiency (AQE) reaches up to 22.4% at 420 nm. This work launches a typical exemplification for the high-efficiency photocatalytic application of conjugated polymer photocatalysts by triggering synergistic effect of multi-part functionalization.
研究领域:
材料科学
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化学工程
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Bingwen Long,Jiapo Song,Keke Yao,Yigang Ding
New density and vapor–liquid equilibrium data of PCl 3 -benzene binary system at atmospheric pressure (99.7–101.3 kPa) were carefully measured to provide crucial information for their industrial reaction and separation. The experimental mixture densities show excellent linear dependence on both solution composition and temperature and a generalized empirical correlation is proposed with an average relative deviation of 0.13%. The specific attractive P-π interaction between the phosphorus atom of PCl 3 and the π cloud of benzene seems to be quite strong in solution, leading to large negative excess volumes. But the π-π antibonding effect from benzene dimers are predominant in PCl 3 highly dilute solution, where positive excess volume and excess partial molar volumes of PCl 3 were observed. Experimental bubble points of the binary mixture were corrected to those under 101.325 kPa. Two distinctive methods of coexistence equation and activity coefficient models of Wilson and NRTL equations were applied to model the VLE data, and they yielded very consistent results. Although no azeotrope were found, this mixture exhibited quite low relative volatility.
研究领域:
物理化学
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化工热力学
✓ 已验证
产品关联
DOI
高影响因子
TETRAHEDRON
·
2019
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IF 2.379
Siyu Wu,Caihong Cheng,Wenlong Hou,Qizhe Li,Danyang Dong,Yongshun Gao,Lu Liu,Bo Liang,Haiquan Zhang
Perylene diimide and its various derivatives tend to form stable anion radicals , which can usually form a variety of aggregates with special properties. Herein, we reported synthesis and properties of the benzo[ghi]perylene trimide and its anion radical π-bonded dimer. The dimer exhibited high stable in solid status and in most organic solvents , but conversion of L-type π-bonded dimer to face to face type π-bonded dimer or π-stacked oligomer occurs in dimethyl formamide solution. The temperature and crystallization influenced the π-bonded length in the dimer and the partial memory can be reserved and probed in solution at room temperature .
研究领域:
有机化学
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材料科学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2025
·Vol. 27
·期 16
·2591-2599
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IF 2.6
Min Lei,Lisha Jiang,Chunhui Wang,Jianxin Song,Wei Liu,Jie Qiu
Deuterium oxide (D2O) is widely used in diverse fields, notably as a moderator in heavy water reactors, for electrolytic extraction of deuterium gas, and in nuclear magnetic resonance (NMR) research. However, it exhibits a high susceptibility to H2O contamination. Herein, a fluorescent hydrogen-bonded molecular organic crystal (ASP-101) with robust π–π interactions was synthesized by using 5,5′-(9,10-anthracene diphenyl dicarboxylic acid) (H4ADIP) and dimethyl sulfoxide (DMSO). Distinct fluorescence quenching phenomena were observed when ASP-101 was soaked in H2O and D2O. Based on these phenomena, subsequent studies demonstrated that ASP-101 is capable of detecting trace amounts of H2O in D2O, with a KSV value of 6 × 10−2 M−1 and a detection limit of 6.5 × 10−3 M (0.117 ppm). Batch experiments proved that the DMSO molecules within ASP-101 undergo exchange with H2O and D2O after soaking in aqueous solution. Previous research had found that deuteration can affect the emission properties of organic molecules. Thus, ASP-101's ability to detect H2O in D2O may be attributed to the fluorescent difference arising from the incorporation of H2O and D2O into its structure via solvent exchange. This study presents an authentic scenario for advancing isotopic identification based on alterations in fluorescence induced by solvent exchange.
研究领域:
材料科学
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有机化学
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分析化学
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核工程
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荧光光谱学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
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2022
·
IF 5.723
Qiaozhi Ma,Jianying Lin,Mingzhao Guan,Haotong Liang,Qiyu Liu
Selective hydrolysis of crystalline cellulose to cello-oligosaccharides in molten salt hydrates (MSHs) is a promising method for valorization of lignocellulose. However, the by-products derived from cellulose hydrolysis can facilitate cello-oligosaccharide degradation and decrease its selectivity. To address this issue, lignin-based hyper cross-linked polymers (LHCPs) were prepared to in situ adsorb by-products during hydrolysis and thus prevent cello-oligosaccharides from degradation. The synthesized LHCP‐33%, with a high lignin content of 33%, showed a remarkable surface area of 708.7 m 2 g −1 and good hydrophilicity, exhibiting a promising adsorption capacity of 340 mg g −1 towards 5-hydroxymethylfurfural (5-HMF), which is supposed to be the major cellulose-derived by-product. We showed that 5-HMF adsorption was driven by the formation of CH-π bonds between 5-HMF and aromatic rings on LHCP. When LHCP‐33% was employed in cellulose hydrolysis, the yield of cello-oligosaccharide can be efficiently enhanced from 39.5% to 78.2%. This work offered a new application of lignin in enhanced cello-oligosaccharide production from cellulose.
研究领域:
化学工程
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材料科学
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生物化工
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Chenjie Ding,Shifei Kang,Wenxin Li,Weikang Gao,Zhihao Zhang,Lulu Zheng,Lifeng Cui
Heterogeneous photo-Fenton catalysts prepared by doping metal ions in g-C 3 N 4 are promising alternatives to traditional homogeneous Fenton catalysts, but are restricted by poor mesoporous structure and agglomerate of metal species. Recently, the highly uniformly dispersed metal-N active sites in various photocatalysts have been proved to be the critical reason for their enhanced catalytic activity. In this study based on reasonable control of mesoporous structure and metal-N active sites, mesoporous Fe-g-C 3 N 4 was synthesized using a simple one-step thermal shrinkage polymerization method using ferrous oxalate as iron source and pore-forming agent. The Fe and N elements in the triazine ring skeleton of Fe-g-C 3 N 4 form a σ-π bond, thus the photogenerated electrons can be quickly transferred to Fe 3+ to form Fe 2+ under the interaction of chemical bonds, accelerating the Fenton reaction rate. Density functional theory calculations results demonstrate that the energy band structure and electron cloud density distribution of Fe-Nx active structure are better than that of routine FeOx crystal structure with metal species agglomeration. In addition, the excellent mesoporous structure of Fe-g-C 3 N 4 creates conditions for the high exposure of Fe-Nx active sites in the photo-Fenton reaction under visible light. The as-developed Fe-g-C 3 N 4 system shows high recyclability and excellent photo-Fenton performance for removal of typical intractable pollutants (The degradation rate of dye and tetracycline reaches 98.2% and 98.7% at 60 and 120 min, respectively). This work provides a facile and sustainable route to develop mesoporous highly-active heterogeneous Fenton-like catalysts and even further general the design of general catalyst with ideal metal-N active sites, thereby promoting a feasible and efficient wastewater remediation solution.
研究领域:
环境科学
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材料科学
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催化
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光化学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yuyu Li,Jiale Liu,Xian Liu,Lujia Han
Adsorption is a widely recognized and effective method for treating high-concentration organic industrial wastewater. Bone char (BC) is a promising adsorbent for removing ionic organic pollutants (IOPs) from printing and dyeing wastewater due to its advantageous adsorption properties. To analyze BC's targeted adsorption and specific action mechanism on IOPs, the author first elucidated the physicochemical properties of BC under different preparation conditions. Subsequently, the study compared the targeted adsorption efficacy of BC on various types and molecular structures of IOPs. Through correlation analysis, feature importance analysis, and consideration of the properties of the target substance, the study investigated the targeted adsorption laws of BC for IOPs. Lastly, for substances with specific adsorption characteristics, range analysis, structure–activity relationship analysis, and quantitative analysis of adsorption mechanisms were employed to elucidate the action mechanism of BC. The results indicate that the differences in physicochemical properties (especially CEC and pH) caused by the inorganic mineral components of BC and the number of conjugated double bonds in the molecular structure of IOPs are key factors determining the adsorption effect. Controlling BC's pore structure and electrical conductivity based on the aggregates' conjugated double bonds and particle size can improve adsorption outcomes. The hierarchy of preparation factors influencing the adsorption performance of BC is pyrolysis temperature > particle size > pyrolysis atmosphere. The adsorption of malachite green (MG) by BC primarily involves chemical reactions, including mineral complexation effect (52.38 %), electrostatic interaction (24.76 %), π-π interaction (8.15 %), metal ion exchange (8.12 %), and physical pore filling (6.59 %). It is speculated that the primary interaction mechanism between BC and MG is through cation-π bonds formed between metal cations dissociated from the inorganic mineral components of BC and MG, facilitated by strong electrostatic interaction. The findings offer a theoretical basis for the practical utilization of BC in adsorbing IOPs.
研究领域:
环境科学
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水处理
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化学工程
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Xier Gong,Jie Wang,Liying Bin,Weirui Chen,Ping Li,Pengran Guo,Zhiliang Chen,Bing Tang
The present study aimed to prepare an aluminum-based nanoflower (Al-NF) adsorbent using wasted aluminum polishing solution as raw materials, which effectively isolated the residues of anti-epidemic related drugs (lopinavir (LPV) and ciprofloxacin (CIP)) from wastewater. A comprehensive characterization approach involving SEM, XRD, BET, TGA, FTIR, and XPS was employed to investigate the adsorption capacity and mechanism of Al-NF towards LPV and CIP. The results revealed that the adsorption process involved both homogeneous and non-homogeneous interactions between the LPV/CIP molecules and the Al-NF surface. According to the Langmuir model calculations, the maximum adsorption capacities of Al-NF for LPV and CIP at 293.15 K were determined to be 32.41 mg/g and 14.43 mg/g, respectively, while their adsorption kinetics followed a pseudo-second-order model more appropriately. Furthermore, the spontaneous exothermic nature of LPV/CIP adsorption on Al-NF was confirmed by thermodynamic analysis. The mechanism investigations indicated that hydrogen bonding, electrostatic interaction, π-π bonding interaction, as well as n-π EDA bonding collectively contributed to the overall adsorption process on the Al-NF surface for both LPV and CIP species. Additionally, the reusability demonstrated by Al-NF highlights its potential as a promising low-cost material for removing anti-epidemic related drug residues from wastewater utilizing industrial hazardous wastes.
研究领域:
环境科学
·
材料科学
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化学工程
·
废水处理
✓ 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）