JOURNAL OF POROUS MATERIALS
·
2024
·Vol. 31
·期 3
·913-922
·
IF 2.5
Wu Chengqiang,Li Yingping,Ma Yongping,Lei Yuexiang,Wang Meijing,Chen Zhen
A novel loaded copper ion catalyst, Cu/MCM-41-SH, was synthesized using CuI-modified thiol-functionalized MCM-41 silica-based materials, and the prepared catalysts were characterized by XPS, FT-IR, SEM and N 2 adsorption–desorption techniques. The XPS results indicated that the chemical valence of the copper that adsorbed on the CuI/MCM-41-SH surface was + 1 valence. N 2 adsorption–desorption showed that the adsorption–desorption isotherms of both MCM-41 and CuI/MCM-41-SH materials were type IV with H4-type hysteresis loops, and the pore size and specific surface area of the materials were reduced. This work demonstrates that that when the reaction time was 2 h, the reaction temperature was 80 ℃ and the catalyst dosage was 100 mg, the conversion of tetralin was obtained as 92.63% and the selectivity of α-tetralone was 84.84%. The catalyst showed good reusability in the three recovery experiments. These results show that the catalyst has potential applications for green and sustainable development.
研究领域:
材料科学
·
催化
·
纳米技术
·
环境化学
·
绿色化学
✓ 已验证
DOI
高影响因子
Lubricants
·
2022
·Vol. 10
·期 11
·287
·
IF 3.584
Jiajia Fu,Chen Chen,Qiong Tang,Hong Xu,Lei Liu,Jinxiang Dong
Alkyltetralins similar to naphthenic base oil were successfully synthesized by Friedel–Crafts alkylation of tetralin with short-chain α-olefins (C3/C4), where the applied chemical feedstock could be obtained from coal chemical industry with ease. The Et3NHCl-AlCl3ionic liquid (IL) as catalyst exhibited excellent catalytic performance for alkylation of tetralin withn-butene or propylene. The reaction conditions were investigated in detail to achieve the high selectivity toward multi-alkyltetralins, and the selectivity for multi-alkyltetralins could reach as high as 90% with the complete conversion of tetralin. For comparison, three alkyltetralins with various side-chain alkyl groups and number of side-chains on tetralin were isolated, which behaved as lubricating base oils for investigation. The synthetic oils exhibited an excellent low temperature fluidity, and good potential for compatibility with additives. Di-propyltetralins (DPT) and di-butyltetralins (DBT) displayed the lower friction and wear values than mono-butyltetralins (MBT), which had comparable tribological properties to the commercial naphthenic base oil 4006 (N4006).
研究领域:
化学工程
·
催化
·
润滑科学
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 81
·期 10
·2078-2091
·
IF 1.638
Dong Shuyu,Zhai Xiaoxue,Pi Ruobing,Wei Jinbao,Wang Yunpeng,Sun Xuhui
Degradation of naproxen (NAP) by persulfate (PS) activated with zero-valent iron (ZVI) was investigated in our study. The NAP in aqueous solution was degraded effectively by the ZVI/PS system and the degradation exhibited a pseudo-first-order kinetics pattern. Both sulfate radical (SO 4 •− ) and hydroxyl radical (HO • ) participate in the NAP degradation. The second-order rate constants for NAP reacting with SO 4 •− and HO • were (5.64 ± 0.73) × 10 9 M − 1 s − 1 and (9.05 ± 0.51) × 10 9 M − 1 s − 1 , respectively. Influence of key parameters (initial pH, PS dosage, ZVI dosage, and NAP dosage) on NAP degradation were evaluated systematically. Based on the detected intermediates, the pathways of NAP degradation in ZVI/PS system was proposed. It was found that the presence of ammonia accelerated the corrosion of ZVI and thus promoted the release of Fe 2+ , which induced the increased generation of sulfate radicals from PS and promoted the degradation of NAP. Compared to its counterpart without ammonia, the degradation rates of NAP by ZVI/PS were increased to 3.6–17.5 folds and 1.2–2.2 folds under pH 7 and pH 9, respectively.
研究领域:
环境科学
·
化学
·
水处理技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Wen-bo Zhao,Wen-shuo Zhang,Jun Shen,Yu-gao Wang,Yan-xia Niu
The high-temperature coal tar wash oil contains two valuable components, namely, quinoline and 2-methylnaphthalene. These two components are challenging to separate during the deep processing. To address this issue, the COSMO-RS (Conductor-like Screening Mode for Real Solvent) model was utilized to identify them as a potential deep eutectic solvents (DESs) extractant. Based on the calculated infinite dilution activity coefficient, the performance indexes of DESs , including selectivity, solubility, and performance index were determined and utilized to identify high-performance extractants for the quinoline/2-methylnaphthalene system. Finally five DESs were selected based on these indexes, they are DES1 formed by Choline chloride: propionic acid with the molar ratio of 1:1, similarly, DES2 is Choline chloride:oxalic acid of 1:1, DES3 Tetraethylammonium chloride:propionic acid of 1:1, DES4 Tetraethylammonium bromide:itaconic acid of 1:2 and DES5 Tetraethylammonium bromide:propionic acid of 1:2. The liquid–liquid phase equilibrium experiments of the aforementioned five DESs at different temperatures (30 ℃, 40 ℃, and 50 ℃) under atmospheric pressure were conducted. The results showed that five kinds of DESs had good extraction effect on quinoline. The DESs formed by choline chloride and anhydrous oxalic acid had the best extraction effect. The quantum chemical single-molecule optimization of different HBDs and HBAs in DESs, intermolecular interaction energy analysis and independent gradient modeling shows that it is mainly induced by the formation of shared electron pairs by providing empty orbitals from DESs and lone pair of electrons from the quinoline molecule, and the main force is the weak hydrogen bonding force.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FLUID PHASE EQUILIBRIA
·
2014
·
IF 2.241
Rongrong Li,Guobo Huang,Huanan Hu,Chenghong Li,Wenping Jia
In this work, solid–liquid equilibria (SLE) data for ternary sodium 1-naphthalenesulfonate + sodium 2-naphthalenesulfonate + water system was measured at (283.15, 303.15 and 323.15) K respectively. The diagrams for solid liquid phase of the ternary system were well-established by the measured solubility data. The solid phases formed in the studied system were determined by the method of Schreinemaker’s wet residue. Moreover, the density of equilibrium liquid phase was gained in the process. At each temperature, there are two pure solids forming. They are sodium 1-naphthalenesulfonate and sodium 2-naphthalenesulfonate in the ternary system. The solubility data for the ternary system were calculated and regressed by NRTL model, giving acceptable results for the investigated systems.
研究领域:
化学热力学
·
物理化学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Dan Huang,Hao-Yun Zhang,Hua-Jun Wang,Hong-Jia Huang,Shuang Liu,Chu-Yi Qiu,Cai-Qin Cheng,Yun Huang,Zhaohe Luo,Wei-Dong Yang,Hong-Ye Li,Xiao-Fei Zheng,Da-Wei Li
Polycyclic aromatic hydrocarbons (PAHs), especially naphthalene (Nap), pose a significant threat to coastal ecosystems and may contribute to the occurrence of harmful algal blooms (HABs). However, the response mechanisms of HAB species to PAH pollution remain unclear. This study investigated the physiological and molecular responses of the HAB species Heterosigma akashiwo to varying Nap concentrations. Low concentrations (1–10 μg/L) promoted growth, while high concentrations (20–1000 μg/L) inhibited growth, causing abnormal cell morphology and oxidative stress. Within 96 h, H. akashiwo removed 82.38 % (10 μg/L) and 88.93 % (100 μg/L) of Nap, mainly through biodegradation and intracellular accumulation. Transcriptomic analysis revealed that H. akashiwo employs a multifaceted adaptive strategy to cope with Nap stress. Key mechanisms include the upregulation of calcium signaling, transcription factors (e.g., zinc finger protein C2H2, myeloblastosis transcription factor, basic leucine zipper transcription factor), heat shock proteins (e.g., HSP40), and fatty acid desaturase (FAD), enhancing stress tolerance through detoxification, antioxidant responses, and membrane integrity. Activation of peroxisomal and oxidative phosphorylation genes indicates improved detoxification and energy metabolism. Differential expression of genes in the PI3K-Akt pathway reveals dose-dependent growth responses, with low concentrations promoting proliferation and high concentrations inhibiting growth. These findings offer insights into H. akashiwo ’s adaptive responses to Nap, aiding ecological risk assessment and bioremediation strategies for PAH pollution in marine environments.
研究领域:
海洋生物学
·
环境科学
·
生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2021
·Vol. 97
·期 5
·1267-1274
·
IF 3.174
Ganning Zeng,Chunxian Hong,Yuan Ma,Mingming Du,Yan Zhang,Hongwei Luo,Bing Chen,Xiangliang Pan
BACKGROUND During the past two decades, aquatic polycyclic aromatic hydrocarbon (PAH) contamination has gained more and more attention, because of carcinogenicity or mutagenicity, toxicity, persistence and bioaccumulation, and a huge threat posed to entire ecosystems. RESULTS Sargassum horneri ( SH )-based carbon was pretreated with ethanol and formaldehyde, and obtained after pre-carbonization using H 2 SO 4 . The SH carbon powder was used to immobilize nano-TiO 2 in aquatic environment by a facile sol–gel method. The resulting C/TiO 2 catalyst was applied to photocatalytic aquatic naphthalene degradation under sunlight and showed the best naphthalene degradation performance of 83.77% under simulated sunlight, which could be attributed to the shape and structure contribution originating from SH . C/TiO 2 served as both adsorbent and catalyst in the degradation process of naphthalene, and the photodegradation process conformed to a double-exponential kinetic model, indicating that there are physical and chemical processes involved in the degradation. The mechanism for enhanced photocatalytic activity was verified as a synergistic mechanism resulting from SH -based carbon and TiO 2 , and showed industrial potential for removal aquatic PAH pollutants. CONCLUSIONS This study verifies that the synergistic effect resulting from SH -based carbon and TiO 2 enhanced the photocatalytic performance. © 2021 Society of Chemical Industry (SCI).
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Ruihan Xiong,Zhuojun Lu,Qian Tang,Xueling Huang,Huazhen Ruan,Wei Jiang,Yiqun Chen,Zizheng Liu,Jianxiong Kang,Dongqi Liu
This study reports on the propranolol (PRO) degradation performance and product toxicity of an ultraviolet light-emitting diode (UV-LED)/chlorine process. The effects of experimental parameters including solution pH, chlorine dosage, and water matrix constituents on PRO removal were evaluated. Up to 94.5% of PRO could be eliminated within 15 min at a PRO-to-chlorine molar ratio of 1:4. The overall removal efficiency of PRO was non-pH dependent in the range of 5–9, while the initial rate was accelerated under alkaline conditions. The presence of Cl − /HCO 3 − had little influence on the PRO degradation, whereas either humic acid or NO 3 − had an obvious inhibitory effect. Radical scavenger experiments showed that both HO and Cl primarily contributed to the PRO degradation, and electron paramagnetic resonance data demonstrated the generation of 1 O 2 . The transformation of PRO during this process led to five detected products, which exhibited a higher acute toxicity than the parent compound according to the bright luminescent bacillus T3 method. It is worth mentioning that under the same ultraviolet illumination intensity, the degradation of PRO under UV-LED/chlorine gave a better performance than UV 254 /chlorine, but the EEO of the former is obviously higher than the latter. So further research is required on improving the electric current to photon conversion efficiency for UV-LED. Additionally, the UV-LED/chlorine system was effective in the degradation of other drugs including sulfamethoxazole, oxytetracycline hydrochloride, and gatifloxacin, suggesting the possible application of the UV-LED/chlorine process for the removal of pharmaceuticals during wastewater treatment .
研究领域:
环境科学
·
毒理学
·
水处理工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2012
·
IF 2.098
Shucai Liang,Hui Yu,Jin Xiang,Wang Yang,Xiaohui Chen,Yanbin Liu,Chen Gao,Guoping Yan
A new naphthalimide modified polyethylenimine (PEI) nanoparticles (called NPEI-NPs) was synthesized and applied as fluorescent probe for rapid, selective and sensitive fluorometric detection of trace DNA. The synthesis involved the covalent modification of PEI with 4-butylamino-N-carboxymethyl-1,8-naphthalimide(BACMN) for getting amphiphilic polymer. Then the amphiphilic polymer was self-assembled in water to give the NPEI-NPs. NPEI-NPs was soluble in water and emitted fluorescence at 545 nm with exciting at 460 nm. The fluorescence spectra resulting from the interaction between NPEI-NPs and DNA indicated that the fluorescence of NPEI-NPs increased in the present of DNA. Therefore, a fluorescence enhancement method was developed for the determination of trace fish sperm DNA (fsDNA) and calf thymus DNA (ctDNA). Under the optimal conditions, the calibration curves were linear over the concentration ranges of 0.05–2.8 μg/mL for fsDNA and 0.08–3.0 μg/mL for ctDNA. The detection limits for fsDNA and ctDNA were 1.6 and 2.0 ng/mL, respectively. The proposed method has been employed to quantify DNA in synthetic samples with the satisfactory results.
研究领域:
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
AICHE JOURNAL
·
2022
·Vol. 68
·期 7
·e17679
·
IF 4.167
Jun Liang,Lei Ni,Peihong Wu,Hang Yao,Qiang Chen,Gang Fu,Juncheng Jiang
In this study, different calorimetric and analytical techniques were used to evaluate the thermal behavior of the preparation of 1-nitronaphthalene through the nitration of naphthalene with mixed acid. Differential scanning calorimetry and adiabatic calorimetry revealed that 1-nitronaphthalene lacks thermal decomposition characteristics. The results of reaction calorimetry, high-performance liquid chromatography, and the density function theory method were combined to analyze the reaction mechanism. An expanded Stoessel criticality diagram was developed to evaluate the process safety of the semibatch nitration reaction. The results revealed a higher degree of risk than that obtained when using the traditional Stoessel criticality diagram. Kinetics parameters of the reaction were investigated.
研究领域:
化学工程
·
工艺安全
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2015
·
IF 2.037
Fang Zhang,Yaocun Tang,Long Wang,Li Xu,Guoji Liu
The solubility of 2-methylnaphthalene in different organic solvents was experimentally studied by the equilibrium method at temperatures from (278.15 to 303.15) K under atmospheric pressure. The solubility of 2-methylnaphthalene in all solvents increased with the increasing temperature. The solubility data were correlated with four thermodynamic models including the van’t Hoff equation, modified Apelblat equation, λh equation, and Wilson model. It was found that the calculated solubility with modified Apelblat equation provided a good agreement with the experimental values for the solubility behavior of 2-methylnaphthalene. The thermodynamic properties of the standard dissolution enthalpy, standard entropy, and the standard mole Gibbs free energy were evaluated based on the van’t Hoff analysis. The values of enthalpy of dissolution are positive, which indicate that the dissolution process of 2-methylnaphthalene in different organic solvents is endothermic.
研究领域:
化学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Brian Musikavanhu,Dongwei Zhu,Mengran Tang,Zhaoli Xue,Shengjun Wang,Long Zhao
Naphthol hydrazone derivatives are recognized as efficient chelating agents for both qualitative and quantitative detection of metal ions. Here we design a naphthol hydrazine-based chemosensor with covalently linking a strong electron-withdrawing benzothiadiazole group to modulate the molecular electronic structure, nominated as NtHzBtd . The fluorescent probe performs excellent selectivity and sensitivity towards Fe 3+ with 1:1 binding stoichiometry, while exhibiting a quick response at 55 s with a relatively low limit of detection of 0.036 µM. A series of spectroscopic measurements in tandem with theoretical calculations suggest that the probe undergoes both intramolecular charge transfer (ICT) and chelation enhanced quenching (CHEQ) processes. Successful color rendering of paper strips and bioimaging in PC3 cells demonstrate the promising applicability of NtHzBtd for portable Fe 3+ detection in real samples and biosystems.
研究领域:
分析化学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）