CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2025
·
IF 3.7
Xile Tian,Fancheng Meng,Xianglan Zhang,Yongchao Wang,Yahui Liu,Jian Zhang,Shuai Zhao,Desheng Chen,Lina Wang,Tao Qi
The high-acidity vanadium-containing solution contains high concentrations of iron and aluminum with pH around 0.5, the ketoxime extractant with the active ingredient of 2-hydroxy-5-nonylacetophenone oxime (HNAO, HL) was proposed to extract vanadium from the solution. Under the phase ratio (O/A) of 1:2, HNAO concentration of 0.542 mol·L −1 at 25 °C for 10 min, 99.06% of vanadium was extracted after a three-stage countercurrent extraction, while the extraction of impurities was less than 1%, with the separation coefficients of vanadium from iron and aluminum were 137050 and 43197, respectively. The antioxidant properties of the extractant were studied. At 25 °C, the extractant basically did not undergo oxidative degradation. Besides, about 91.2% of the loaded vanadium was effectively stripped using 2.5 mol·L −1 Na 2 CO 3 solution. The extraction mechanism of vanadium was investigated through the slope analysis method, the spectral characterizations and density functional theory calculations. It has been observed that VO 2 + substitutes the H atom on the phenolic hydroxyl and coordinates with the N atom on the oxime and the O atom on the phenolic hydroxyl to form of a six-membered ring, and the extraction complexes were determined to be VO 2 (H 2 O)L and VO 2 L.
研究领域:
化学工程
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冶金工程
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材料科学
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DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Haoxiong Cui,Zhong Lin,Kelin Zhu,Guoan Cheng,Xiaoling Wu,Ruiting Zheng
The comprehensive investigation was conducted to analyze the corrosion behavior and surface potential of pure copper surfaces in various acidic solutions. We carried out Zeta potential measurement, electrochemical measurement and in situ Raman spectroscopy to investigate the corrosion process and surface potential of copper in acidic solutions with different pH. It was found that the variation in zeta potential with pH corresponds to the corrosion behavior of copper during this process. In 1mmol / L aqueous chloride media, when the pH is greater than 3.5, unalloyed copper is oxidized to monovalent copper. At this stage, as the pH decreases, the zeta potential gradually increases. When the pH reaches 3.5, the Zeta potential reaches the highest, and the rate of cuprous oxide formation reaches the maximum. When the pH continues decrease, unalloyed copper begins to be oxidized to divalent copper, and the zeta potential will also decrease, the surface charge state shifts to the positive direction. Furthermore, our experimental findings are complemented by Density Functional Theory (DFT) calculations.
研究领域:
材料科学
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电化学
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表面科学
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DOI
高影响因子
Nano Research
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2023
·Vol. 16
·期 8
·10748-10755
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IF 9.9
Li Junhua,Jiang Yi,Zhang Xu,Huo Yidan,Du Fanglin,Tuo Yongxiao,Guo Zhiyan,Chen Dawei,Chen Shenghua
The electrooxidation of the alcohol and aldehyde molecules instead of water coupled with H 2 production has been proven to be effective for producing high-value fine chemicals under alkaline conditions. It is also noteworthy that under acidic conditions, the stability of non-noble metal water oxidation catalysts remains a great challenge due to the lattice oxygen mechanism. Hence, we coupled the biomass-derived glucose oxidation for high-value D-glucaric acid (GRA) with ultra-durable hydrogen in acid solution over a Yb-MnO 2 catalyst. The Mn 3+ regulated by Yb atoms doped in MnO 2 can effectively optimize the adsorption and desorption processes of the alcohol and aldehyde group and improve the intrinsic activity but cannot for H 2 O. The catalyst exhibited extremely high activity and stability after 50 h for glucose oxidation, inhibiting the lattice oxygen process and MnO 4− formation, while the activity was quickly lost within 0.5 h for water oxidation. Density functional theory (DFT) calculations further demonstrated that glucose oxidation reaction proceeds preferentially due to the oxidation of aldehyde group with lower adsorption-free energy (−0.4 eV) than water (Δ G > 0 eV), avoiding the lattice oxygen mechanism. This work suggests that biomass-derived glucose oxidation not only provides a cost-effective approach for high-value chemicals, but also shows an extremely potential as an alternative to acidic oxygen evolution reaction (OER) for ultradurable H 2 production.
研究领域:
生物化学
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催化化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Xiao-Yi Tang,Hui-Di Zhang,Zi-Jie Li,Shuai Wang,Si-Yan Liu,Tao-Yuan Xiu,Ji-Pan Yu,Lin Wang,Li-Yong Yuan,Wang-Suo Wu,Wei-Qun Shi
The ability to adsorb uranium from acidic solutions is generally inadequate due to the instability of adsorbents and the significant protonation of functional groups. In this study, we synthesized two phosphorylated covalent organic frameworks (COFs, P-St-TzDa-Phos and TzPa-Phos) in addition to the previously examined TzDa-Phos, that are similar in chemical composition and structure but differ in their linkage units, ranging from strong quinoline and −C(H 2 PO 3 )–NH- linkages to dynamic imine bonds. Adsorption tests indicated that the ability to adsorb uranium followed the order of P-St-TzDa-Phos > TzDa-Phos > TzPa-Phos at a pH of 3.0 and in more acidic conditions. This trend was attributed to the more negative charge of the superior framework or lower positive charge, which enhances the electrostatic attraction of cationic uranium species to the adsorbent, as well as the higher grafting ratios of phosphonic acid groups, which are the main sites for uranium binding. Notably, P-St-TzDa-Phos demonstrated uranium adsorption capacities of 106 mg/g at pH 1.0 and 45 mg/g under 3 M HNO 3 conditions, making it one of the most effective adsorbents in this area. This research could inform the design and creation of new solid-phase adsorbents for the efficient extraction of uranium from highly acidic solutions.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2020
·
IF 5.162
Sihua Zeng,Jisuan Tan,Xu Xu,Xiaohua Huang,Li Zhou
Despite impressive progress of macromolecular encapsulation technique based on hyperbranched polymer (HP), the use of natural HP for guest encapsulation has rarely been reported. Herein, we present the simple synthesis of amphiphilic PGP-DC from natural peach gum polysaccharide (PGP) and demonstrate that the PGP-DC can be utilized as a robust host for encapsulation of dye molecules from water. The influences of initial dye concentration, dosage of PGP-DC, pH, ionic strength , and encapsulation mode on the encapsulation were systematically studied. The PGP-DC simultaneously exhibited fast encapsulation rate and superior encapsulation capability. Under optimal conditions, the encapsulation capacity of PGP-DC towards methylene blue (MB) (1 mM) can reach as high as 182.67 mg/g, which compares favorably to other separation techniques. Moreover, the MB-encapsulated PGP-DC could be well regenerated in acidic solution. Based on its simple synthetic process, excellent encapsulation performance and fine reusability, the PGP-DC holds great promise for using as a host for practical encapsulation applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2025
·
IF 7.2
Daqian Liu,Zuohai Liu,Min Huang,Taoyuan Xiu,Hamza Shehzad,Yun Wang,Zhirong Liu
The development of adsorbents capable of separating uranium from uranium-containing wastewater involves critical research. In this study, a novel functional carbon material was successfully synthesized by impregnating tri-n-octyl phosphine oxide into the pyrolytic carbon (TOPO@PyC). This material exhibited fast adsorption rate (less than an hour), high adsorption capacity ( q m = 48.1 mg/g) and strong selectivity (98.8 %) for U(VI) under low to moderate acidic conditions. The pseudo-second-order kinetic model and Langmuir isothermal model effectively described the adsorption kinetics and equilibrium data, respectively. The SEM-EDS, FT-IR, XPS and DFT calculations revealed that U(VI) was successfully adsorbed by TOPO@PyC through complexation with P = O group in TOPO. Furthermore, the adsorption efficiency and desorption efficiency of TOPO@PyC remained above 95 % after five cycles, indicating that TOPO@PyC possessed excellent reusability. Consequently, with inertness of pyrolytic carbon and strong selectivity of TOPO, the TOPO@PyC material holds significant potential for the treatment of uranium-containing acidic wastewater.
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
MOLECULES
·
2025
·Vol. 30
·期 7
·1533
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IF 4.6
Yuyang Gan,Yimin Cai,Song Huang,Xiaowei Li,Wen Feng,Lihua Yuan
Nitrogen donor-based ligands are highly promising extractants for palladium separation from high-level liquid waste (HLLW). However, the electronic effect of these ligands, a critical factor influencing their complexation ability with Pd(II), remains largely unexplored. Herein, three picolinamide-based ligands were designed and synthesized, each featuring substituents with distinct electronic effects at thepara-position of the pyridine (electro-donating methoxyl group for L-I, hydrogen for L-II, and electro-withdrawing ester group for L-III). The concurrent processes of Pd(II) coordination and ligand protonation enable the manipulation of pyridine nitrogen electronegativity, resulting in a tunable Pd(II) extraction performance. Notably, L-I exhibits the highest extraction efficiency at low acidities (≤1 M HNO3) but the lowest extraction at high acidities (≥3 M HNO3), whereas L-III shows the poorest efficiency at low acidities but the best performance at high acidities. The Job plot analysis and ESI-HRMS results reveal a 1:1 and 2:1 (L/Pd) stoichiometry in the Pd(II) complexation process. The single crystal X-ray analysis of Pd(NO3)2(L-II)2complex confirms a four-coordinated Pd(II) center, with two pyridine nitrogen atoms and two monodentate nitrate oxygens forming a quadrangular geometry. Density functional theory (DFT) calculations further indicate that the formation of 2:1 (L/Pd) complexes is energetically favored, and the stronger basicity of the nitrogen atoms correlates with a higher Pd(II) binding affinity and increased susceptibility to protonation.
研究领域:
化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Results in Chemistry
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2025
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IF 4.2
Chengjia Bao,Weijian Qi,Zhuanjun Zhu,Ting Xu,Long Zhao,Yanhong Ma,Yang Liu,Bowen Yang,Xueru Luo,Hui Yun,Xiaojuan Li
Chitosan (Chi), curcumin (Cur) and geraniol (Ger) are natural compounds, which can potentially serve as green corrosion inhibitors. Herein, the corrosion inhibition efficiency (IE) of them was compared. The corrosion rate of 1.5 mM Chi on the 1 st d was 0.78 ± 0.41 g/ (m 2 h), significantly lower than that of the control group (CK) (2.59 ± 0.32 g/ (m 2 h)), while the corrosion rate of 2 mM Cur decreased by 8.48–18.71 times. The corrosion IE of 1.5 mM Ger remained above 60 % for over 15 days. To improve corrosion IE on Q235 steel in acidic solution, two-component and three-component compounds of them at their optimal IE concentrations were also tested and evaluated by weight loss and electrochemical analysis. Chi+Cur + Ger exhibited the minimum growth rate of corrosion rate (0.19–15.36 g/ (m 2 h)) and the maximum corrosion IE (81.87–96.41 %) during 20 days. The weight loss was 20.65 % of the control on the 20th day. The Tafel results indicated Chi+Cur + Ger functioned as a mixed-type corrosion inhibitor, inhibiting the cathodic reaction more significantly. The surface observation and X-ray photoelectron spectroscopy (XPS) proved the formation of an adsorption layer on the steel surface. Chi and Cur could adsorb on the steel surface through chemical interaction like by amine and/or hydroxyl groups, while Ger through physical adsorption. The synergistic anticorrosion layer not only prevented steel surface from corrosive solution attack, but also increased the resistance to retard the charge transfer in the solution. The results might shed new insight in the application of green complex for steel corrosion inhibition.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Dingzhong Yuan,Tengteng He,Xuan Guo,Jing Huang,Yan He,Yun Wang,Yan Liu,Xiaohong Zhao,Zhirong Liu,Qinghua Zhang
Thorium has received widespread attention as potential nuclear fuel alternative for the next-generation thorium-based molten salt reactors. With the growth of nuclear energy, it is needful to exploit magnetic nanomaterials to remove thorium from aqueous solutions, owing to their superparamagnetism and large specific surface energy. Nevertheless, most of magnetic nanomaterials often suffered from low thorium selectivity and poor structural ability in acidic solutions. Herein, a novel core–shell magnetic nanocomposite Fe 3 O 4 @SiO 2 /P (AA-MMA-VPA) possessing phosphonic acid was developed by a controlled radical polymerization of vinylphosphonic acid (VPA) in the presence of Fe 3 O 4 encapsulated by SiO 2 (Fe 3 O 4 @SiO 2 ). Due to the presence of the high content of phosphonic acid groups and the absence of any universal groups, Fe 3 O 4 @SiO 2 /P (AA-MMA-VPA) displayed exceptional selectivity for thorium in the presence of 11 co-existing cations. The separation factor S Th/M value for Fe 3 O 4 @SiO 2 /P(AA-MMA-VPA) concerning all other competing cations surpassed 74.4, and the largest value for S Th/M even amounted to 343.5. Further, Fe 3 O 4 @SiO 2 /P (AA-MMA-VPA) possessed a maximum adsorption capacity ( q max ) of 485.4 mg g −1 at pH of 3.0, higher than that of other magnetic sorbents. By reason of its core–shell structure, the sorbent possessed an outstanding structure stability even after immersed into HNO 3 solution at pH of 0.5 for 72 h. The sorbent could as well be magnetically recouped, and recycled at least six times without evident diminution in sorption amount. The sterling removal performance of the sorbent was assigned to the interaction of thorium with phosphonic acid, corroborated by FT-IR, XPS and DFT method. Thus, this study affords a new viewpoint for exploiting magnetic nanomaterials with sterling acidic resistance for the strongly selective entrapment of thorium from acidic media.
研究领域:
化学
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材料科学
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Fan Zhang,Kai-Qiang Ma,Yi Li,Qi Ran,Cheng-Yu Yao,Chu-Ting Yang,Hai-Zhu Yu,Sheng Hu,Shu-Ming Peng
The potential nuclear industry applications of Th make its separation from rare earth elements and U a task of great importance. Herein, materials based on phosphorodiamidate-functionalized silica were synthesized for efficient capture of Th(IV) from acidic solutions and subjected to in-depth characterization. SBA-15-O-DMAP, prepared by oxidation grafting, possessed the largest specific surface area, pore volume and grafted group density as well as abundant oxygenated groups, featuring a high Th(IV) sorption capacity, rapid sorption kinetics, and excellent selectivity. The sorption of Th(IV) by SBA-15-O-DMAP was found to be monolayer-type, chemical, endothermic, and spontaneous. In 0.01–1 M HNO 3 , SBA-15-O-DMAP achieved an excellent Th separation performance with separation factors of SF Th/Ln > 1,000 and SF Th/U > 50, and is thus one of the best materials reported so far for Th separation under highly acidic conditions. Theoretical calculations revealed that the high electron deficiency of the Th(IV) center compared to that of other metals contributed to the Th selectivity. In addition, SiO 2 spheres functionalized with phosphorodiamidate groups allowed one to successfully separate Th(IV) from U(VI) and Ln(III) and achieve good element recoveries (>95%), a high Th decontamination factor (>4.7 × 10 4 ), and excellent reusability. Most importantly, the separation of trace Th from excess U and the extraction of Th from monazite were realized. Thus, the prepared adsorbents were concluded to be promising materials for the practical and selective isolation of Th from highly acidic solutions.
研究领域:
核化学
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材料科学
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DOI
高影响因子
ANALYST
·
2011
·Vol. 137
·期 3
·588-594
·
IF 3.913
Xiaoquan Lu,Dong liu,Jie Du,Haifeng Wang,Zhonghua Xue,Xiuhui Liu,Xibin Zhou
The novel phenomenon of cathodic electrochemiluminescence on a gold electrode in tris(bipyridine) ruthenium(II) (Ru(bpy)32+) solution is described for the first time. A cathodic electrochemiluminescence (ECL) was found to mainly occur at 0.4–0.8 V with continuous potential scanning from 0.2–1.4 V and the ECL peak was observed around 0.68 V, which was quite different from generally reported Ru(bpy)32+ ECL. Our group speculated that Ru(bpy)32+ possibly reacts with the gold electrode in the acidic phosphate buffer solution (PBS) to generate luminescence. The possible ECL mechanism was discussed according to the presented results. Moreover, it is revealed that the Au as co-reactant in the Ru-system contributed dominantly to the whole ECL . Therefore, the reaction between Ru(bpy)32+ and the newly formed Au implied that the inert metal Au could become a promising material for ECL investigations.
研究领域:
分析化学
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电化学
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产品关联
DOI
PubMed
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2015
·
IF 3
Xiaoqin Xue,Jiang Xu,Shams Ali Baig,Xinhua Xu
In this study, graphene oxide nanosheets were synthesized and employed to adsorb Cd(II) in acidic aqueous solutions. Characterization techniques, such as AFM, TEM, XRD, FT-IR, Raman and Zeta potential were used to investigate the adsorbent properties. Results demonstrated that the Cd(II) removal efficiency was found to increase from 6.29% to 96.72% with the increase of adsorbent dosage from 0.02 to 2.00 g/L. The removal efficiency remained constant with further increase of the adsorbent dosage. Cd(II) adsorption was greatly enhanced with the increase of solution pH from 2.02 to 4.01. In addition, the adsorption equilibrium was attained within 120 min, and a slight decrease in solution pH was observed after the adsorption of Cd(II). The adsorption data were revealed to fit well in pseudo-second-order kinetics and Langmuir isotherm model, and the maximum Cd(II) adsorption capacity was recorded to be about 44.64 mg/g with 0.50 g/L of adsorbent dosage. Ion-exchange, electrostatic attraction and physical adsorption were found to be involved in the adsorption mechanisms of this process. Findings from this study suggested that the synthesized adsorbent could be highly effective for Cd(II) removal from acidic water environments.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
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