FLUID PHASE EQUILIBRIA
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2014
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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
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物理化学
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2017
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IF 3.648
Qiaojun Lu,Ming Jiang,Xiaoshu Wang,Guobo Huang,Hao Chen,Aiguo Zhong,Cuihong Ye,Hong Chen,Rongrong Li
The solubility of sodium 1-naphthalenesulfonate and sodium 2-naphthalenesulfonate in pure organic solvents of acetone, 1,4-dioxane, cyclohexanone , ethanol, ethyl acetate and isopropanol were measured by using the isothermal saturation method at temperature ranging from (278.15 to 323.15) K under 101.3 kPa. The mole fraction solubility of sodium 1-naphthalenesulfonate and sodium 2-naphthalenesulfonate in the selected pure solvents increased with the increase in temperature. The maximum mole fraction solubility of sodium 1-naphthalenesulfonate was observed in ethanol (2.767 × 10 − 3 at 323.15 K), followed by that in 1,4-dioxane (2.028 × 10 − 3 at 323.15 K), cyclohexanone (1.522 × 10 − 3 at 323.15 K), isopropanol (1.094 × 10 − 3 at 323.15 K), acetone (5.997 × 10 − 4 at 308.15 K) and ethyl acetate (3.111 × 10 − 4 at 323.15 K); For sodium 2-naphthalenesulfonate + solvents systems, the maximum mole fraction solubility was observed in ethanol (1.178 × 10 − 3 at 323.15 K), followed by that in 1,4-dioxane (1.027 × 10 − 3 at 323.15 K), ethyl acetate (6.197 × 10 − 4 at 323.15 K), cyclohexanone (3.233 × 10 − 4 at 323.15 K), isopropanol (1.058 × 10 − 4 at 323.15 K) and acetone (9.683 × 10 − 5 at 323.15 K). The measured solubility data were correlated and calculated by using the modified Apelblat equation, λh equation and NRTL model. The calculated solubilities agreed better with the experimental values by using the modified Apelblat equation than the other two models. Moreover, the mixing properties including the mixing Gibbs energy , mixing enthalpy , mixing entropy, activity coefficient at infinitesimal concentration ( γ 1 ∞ ) and reduced excess enthalpy ( H 1 E , ∞ ) were calculated by NRTL model.
研究领域:
物理化学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2011
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IF 3.074
Ting Wu,Xiang Cai,Shaozao Tan,Hongye Li,Jiesheng Liu,Weidong Yang
In order to explore the potential of graphene (G) in removal of hazardous chemicals in waste water, chemically reduced graphene oxide was employed as the adsorbent and the adsorption characteristics of graphene toward acrylonitrile (AN), p-toluenesulfonic acid (p-TA), 1-naphthalenesulfonic acid (1-NA) and methyl blue (MB) were evaluated under laboratory conditions. The results showed that the organic chemicals with larger molecule size and more benzene rings possessed a higher adsorption speed and a higher maximum adsorption capacity on G. The maximum adsorption capacities of p-TA, 1-NA and MB on G are ∼1.43 g/g G, ∼1.46 g/g G and ∼1.52 g/g G at 30 °C, respectively, which are the highest values of p-TA, 1-NA or MB adsorption on different kinds of today's nanomaterials. Under the maximum adsorption capacity, the absorption quantity of MB on G was dependent on the initial concentration of MB, and higher temperature could facilitate the adsorption process. The G efficiency remains almost constant during the first five cycles of the adsorption–desorption process. In addition, the fluorescence spectra implied that the adsorption of MB on G was a π–π stacking adsorption process. In conclusion, the G could serve as a promising adsorbent for the removal of chemicals containing benzene rings in waste water.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2019
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IF 2.298
Yue Sun,Weisheng Zheng,Rajendra Prasad Singh,Li Chen
In the current work, poly(4-vinylpyridine) (P4VP) was grafted on a macroporous polystyrene resin via free-radical polymerization by using the pendent vinyl group. The grafting conditions such as swelling agent, initiator concentration, reaction temperature, and amount of 4-vinylpyridine (4VP) monomer were optimized, and three resins with different 4VP monomer amounts (SC-1, SC-2, and SC-3) were chosen as adsorbents. P4VP-grafted resins were characterized by scanning electron microscopy, N2 sorption/desorption isotherms, Fourier transform infrared, and X-ray photoelectron spectroscopy. The sorption properties of 2-naphthalenesulfonic acid (NSA) on three resins were comparatively investigated. The experimental data revealed that the sorption process on three resins fitted well with the pseudo-second-order kinetics equation, and the equilibrium isotherms were in good agreement with the Langmuir model. The NSA sorption onto resins was an endothermic and spontaneous process, and SC-3 loaded with NSA can be efficiently regenerated by NaOH and ethanol mixed solution after sorption. The maximum sorption capacities of three resins indicated that P4VP-grafted resins possess good sorption ability toward NSA.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 33
·e202401481
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IF 1.9
Mengyao Liu,Yuling Huang,Panpan Xu,Tingting Xu,Yinggui Zhu
Graphical In this paper, We developed a novel ECL sensor of the 6-MC/S 2 O 8 2− system by using 2-NSA as co-reaction accelerator. 2-NSA was first proposed as co-reaction accelerator, promoting the generation of additional oxidant SO 4 − from S 2 O 8 2− , thus amplifying the ECL signal. Moreover, this research provides a highly sensitive platform for the detection of MV. In this paper, the novel ECL sensor of the 6-methoxychromone (6-MC)/S 2 O 8 2− system was designed by using 2-naphthalene sulfonic acid (2-NSA) as a co-reaction accelerator. Fluorescence, ECL spectrum, and cyclic voltammetry (CV) were used to explore extensively the ECL mechanism of the system. It is worth pointing out that 2-naphthalene sulfonic acid (2-NSA) was first proposed as a co-reaction accelerator, reacting with the coreactant K 2 S 2 O 8 rather than the luminophore, promoting the generation of additional oxidant SO 4 − from S 2 O 8 2− , thus amplifying the ECL signal. Furthermore, under the optimal experimental conditions, the high sensitivity of the 2-naphthalene sulfonic acid (2-NSA)+6-methoxychromone (6-MC)/S 2 O 8 2− system was realized for the detection of methyl violet (MV) in the linear range of 10 −8 ~10 −2 M, with a detection limit of 5.14×10 −10 M. In addition, this find offers some guidance for further developing co-reaction accelerators with excellent performance in the future.
研究领域:
分析化学
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生物传感
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产品关联
DOI
高影响因子
ADSORPTION SCIENCE & TECHNOLOGY
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2019
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IF 1.2
Yue Sun,Weisheng Zheng,Deqiang Yin
Two novel weakly basic anion exchange resins BNH and BN2 bearing two different functional groups was fabricated via the two-step amination of chloromethylated polystyrene-divinylbenzene beads with dibutylamine and dimethylamine. The adsorption properties of BNH and BN2 for the 2-naphthalenesulfonic acid (NSA) removal from wastewater were compared with two synthesized monofunctional anion exchange resins BN0 and BN6 (derived from dimethylamine and dibutylamine, respectively). The experimental data revealed that the adsorption process on the four resins fitted well with the pseudo-second-order kinetics equation and the equilibrium isotherms were in good agreement with the Langmuir model. Thermodynamic analyses illustrated that 2-naphthalenesulfonic acid adsorption onto resins was an endothermic and spontaneous process. Importantly, BN2 still displayed relatively high adsorption capacity in the existence of Na2SO4, indicative of an excellent selectivity for 2-naphthalenesulfonic acid over sulfate than other resins. The obtained results elucidate that BN2 could have potential industrial application in effluent disposal fields because of its superior selectivity, acceptable kinetics, and desorption capability.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2024
·
IF 11.2
Ting Sai,Xiaodi Ye,Bingtao Wang,Zhenghong Guo,Juan Li,Zhengping Fang,Siqi Huo
A series of transparent, intrinsically flame-retardant, and impact-resistant poly(carbonates- b -siloxanes) were synthesized by incorporating Schiff-base modified polysiloxanes (DMS-Schiff) and naphthalene-sulfonate units into the polycarbonate (PC) chain. In addition to high transparency, the resultant copolymers (SS-co-PC5, SS-co-PC9, SS-co-PC14, and SS-co-PC20) exhibited remarkable improvements in fire safety and mechanical performance. Compared to pure PC, these copolymers demonstrated significantly enhanced limiting oxygen index (LOI, up to 34.5%) and a UL-94 V-0 rating under a thickness of only 1.6 mm. The incorporation of the polysiloxane blocks not only improved flame retardancy but also enhanced the impact strength, with SS-co-PC9 showing a 48% increase in elongation at break and a 38% rise in impact toughness compared to pure PC. In addition, SS-co-PC9 presented high mechanical strength. The synergistic effects between the naphthalene-sulfonate and polysiloxane blocks, along with the well-controlled polysiloxane phase separation (sulfonate units enabled lower processing viscosity of copolymers), led to superior comprehensive performance. These findings provide a promising pathway to create high-performance copolycarbonates for real-world applications.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2012
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IF 4.531
Juanjuan Feng,Min Sun,Jubai Li,Xia Liu,Shengxiang Jiang
Physical and chemical properties of ionic liquids (ILs) are significantly affected by types of their cations and anions. In this paper, a novel aromatically functional 1-vinyl-3-octylimidazolium 2-naphthalene-sulfonate salt was synthesized through metathesis reaction between 1-vinyl-3-octylimidazolium bromide and sodium 2-naphthalene-sulfonate, and polymerized onto the stainless steel wire in situ via surface radical chain-transfer reaction. Octanol/water distribution coefficient of the ionic liquid was studied and compared with that of 1-vinyl-3-octylimidazolium hexafluorophosphate. Partition coefficients of polycyclic aromatic hydrocarbons (PAHs) on these two polymeric ionic liquids-coated fibers indicated the enhanced hydrophobicity and aromaticity of the target IL. Analytical parameters exhibited high extraction efficiency of the novel fiber. Calibration ranges for several PAHs were from 0.02 to 200 μg L −1 . Limits of detection (LODs) were ranged from 0.005 to 0.01 μg L −1 . Application reliability of the proposed fiber was also investigated with some phthalate ester plasticizers. LODs were ranged from 0.02 to 0.05 μg L −1 . Hair spray and nail polish were used as real samples, and di-n-butyl phthalate and di-(2-ethyl-hexyl) phthalate were quantified with the established method.
研究领域:
分析化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
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2016
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IF 3.993
Ping Zhang,Ling Li,Yun Zhao,Zeyun Tian,Yumei Qin,Jun Lu
The fluorescent dye 8-anilino-1-naphthalenesulfonate (ANS) is a widely used fluorescent probe molecule for biochemistry analysis. This paper reported the fabrication of ANS/layered double hydroxide nanosheets (ANS/LDH)n ultrathin films (UTFs) via the layer-by-layer small anion assembly technique based on electrostatic interaction and two possible weak interactions: hydrogen-bond and induced electrostatic interactions between ANS and positive-charged LDH nanosheets. The obtained UTFs show a long-range-ordered periodic layered stacking structure and weak fluorescence in dry air or water, but it split into three narrow strong peaks in a weak polarity environment induced by the two-dimensional (2D) confinement effect of the LDH laminate; the fluorescence intensity increases with decreasing the solvent polarity, concomitant with the blue shift of the emission peaks, which show good sensoring reversibility. Meanwhile, the UTFs exhibit selective fluorescence enhancement to the bovine serum albumin (BSA)-like protein biomolecules, and the rate of fluorescence enhancement with the protein concentration is significantly different with the different protein aggregate states. The (ANS/LDH)n UTF has the potential to be a novel type of biological flourescence sensor material.
研究领域:
材料科学
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生物化学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Wensen Liu,Hui Su,Jian Zhang,Lina Wang,Yahui Liu,Jie Liang,Zhaowu Zhu
The hydrometallurgical process for the recovery of nickel and cobalt requires a complex and expensive impurity removal process. Solvent extraction is widely used in industry for the separation, purification, and concentration of metals. However, current commercial extractants encounter some difficulties when cobalt and nickel are extracted from solutions containing a large amount of impurities such as manganese and calcium. There is an urgent need to develop new reagents for the selective extraction of Ni and Co. In this study, N-(2-ethylhexyl)-pyridine-4-carboxamide (NEHPCA) was synthesized, and the metal extraction capacity of its synergistic solvent extraction (SSX) system with dinonylnaphthalene sulfonic acid (DNNSA) and tributyl phosphate (TBP) modifier was examined. The experimental results show that the selectivity of the new SSX system has the order Cu > Ni > Co > Zn > Mn > Ca > Al ≈ Cr (III) ≈ Mg ≈ Fe (III), with excellent selectivity for nickel and cobalt. Using an organic phase composed of 0.7 M NEHPCA, 0.35 M DNNSA, and 0.2 M TBP under 1:1O/A operation, after three-stage theoretical extraction, more than 99% of nickel and cobalt can be recovered from a synthetic leaching solution of nickel laterite ore. Mechanistic studies showed that NEHPCA and water molecules participate in the internal coordination of metals, and DNNSA provided coordination anions to achieve charge balance, forming the Ni complex in this SSX system which existed most likely in the form of [Ni(NEHPCA) 2 (H 2 O) 4 ](DNNS) 2 in the organic phase.
研究领域:
化学工程
·
冶金学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Xiaohong Wang,Jialian Li,Chen Chen,Xu Li,Lei Liu,Jinxiang Dong
Benzene sulfonate surfactants are crucial anionic surfactants, commonly derived from petrochemical sources. Herein, we present a new method for synthesizing alkyl-tetralin sulfonate anionic surfactants using α-olefins (n-hexene, n-octene, n-decene) and tetralin sourced from the coal chemical industry as raw materials. The three-resulting alkyl-tetralin sulfonates (C6-THNS, C8-THNS and C10-THNS), obtained by alkylation and sulfonation of tetralin were characterized through HPLC, FTIR, LCMS and 1 H NMR techniques. Their surfactant properties were also investigated and compared with commercially applied linear alkylbenzene sulfonate (LAS). We observed that C6 alkyl-tetralin sulfonate (C6-THNS) exhibited smaller critical micelle concentration ( CMC =0.60 mM) and lower equilibrium surface tension ( γ CMC =33.43 mN/m). Similarly, C6-THNS also showed comparable foaming, wetting and emulsifying properties with LAS, which can be used as a substitute for LAS surfactants. This study shows that the synthesized alkyl-tetralin sulfonates is a potential surfactant, providing a route for efficiently using coal-based chemicals to synthesize surfactants.
研究领域:
化学工程
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表面活性剂合成
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产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Yue Sun,Deqiang Yin,Jintao Duan,Rajendra Prasad Singh
Weak base anion exchangers are promising for decontamination of aromatic ionizable organic compounds (AIOCs) from industrial wastewaters. However, the effect of alkyl chain length of an amine functional group of resins on decontamination process has rarely been clarified to the best of our knowledge. In the present study, a commercially available weak base anion exchange resin D301 and two newly synthesized ones AEC-2 and AEC-4 with a varying alkyl chain length of amine functional groups (derived from dimethylamine, diethylamine and dibutylamine, respectively) were used for adsorption of ^-naphthalene sulfonic acid (NSA). Adsorption isotherms and influence of solution pH, temperature, time and coexisting competitive inorganic salt (Na 2 SO 4 ) on adsorption behavior were investigated and the column adsorption-regeneration tests were carried out. Results showed that adsorption selectivity for NSA over sulfate increased with increasing the alkyl chain length in the high saline water. But the sorption velocity decreased to a moderate extent with increasing the alkyl chain length. Thermodynamic parameters indicate that adsorption is an exothermic and spontaneous process, and NSA adsorption onto AEC-4 is an enthalpy-driven process, while that of D301 as well as AEC-2 is an enthalpy- and entropy-driven simultaneous process. Further, results of column tests validate long alkyl chain enhancing the sorption selective for NSA and suggest the sorption process can be reversible.
研究领域:
环境工程
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水处理化学
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吸附科学
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功能高分子材料
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工业废水治理
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DOI
高影响因子
危险品化学品经营许可证（带存储）