HYDROMETALLURGY
·
2019
·
IF 3.465
Kai Li,Ji Chen,Dan Zou,Yuefeng Deng,Deqian Li
The extraction of cerium(IV) (Ce(IV)) from a nitric acid (HNO 3 ) system using a novel extractant, tris(2-ethylhexyl)phosphine oxide (TEHPO), was studied. The separation factors of Ce(IV)/Th(IV) and Ce(IV)/Ln(III) (La 3+ , Gd 3+ and Lu 3+ ) were found to be in the range of 60–127 and 121–827, respectively, in the HNO 3 concentration range of 0.5–5.0 mol/L, showing high selectivity with TEHPO. The experimental results showed that TEHPO can effectively extract Ce(IV) from a HNO 3 system quantitatively in a 2:1 form (molar ratio of TEHPO: Ce(IV)), which is unrelated to the experimental conditions, that is, factors such as HNO 3 concentration, extractant concentration, and temperature. The loaded Th(IV) could be stripped efficiently using H 2 O, but Ce(IV) should be stripped using H 2 O 2 . The extraction mechanisms of HNO 3 and Ce(IV) with TEHPO were determined through the slope analysis method, infrared spectroscopy (FT-IR), and electrospray ionization mass spectrometry (ESI-MS), and the extracted complexes were found to be HNO 3 ·TEHPO and Ce(NO 3 ) 4 ·2TEHPO. Comparison of their extraction performances revealed that TEHPO shows a better interfacial phenomenon and higher extraction ability and saturation loading capacity than those of Cyanex923.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 89
·86602-86606
·
IF 3.289
Zhen Lin,Namei Wu,Wensong Yao,Jinyuan Chen,Shaoguang Li,Ailin Liu,Xinhua Lin
Chemiluminescence (CL) happened in chemical reactions, in which electronically excited intermediates or products were obtained and subsequently released energy with emission of light. CL is a useful approach to investigate active radicals involved in one system. In the present work, we first found SiC·SiOx, a new kind of zero-dimensional silicon-based nanomaterial, owned CL properties in the presence of Ce(IV)–Na2SO3. The CL mechanism was further investigated by the CL, ultraviolet-visible light (UV-vis), and electron spin resonance (ESR) spectra. Mechanistic investigation indicated SiC·SiOx increased the generation of singlet oxygen in the Ce(IV)–Na2SO3 system and excited SiC·SiOx could be produced from the combination of hole and electron injected SiC·SiOx. This opens up an avenue for investigating the CL properties of SiC·SiOx and promotes their application in various fields.
研究领域:
材料科学
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化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2013
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IF 3.172
Zhi-Gang Wang,Gong Cheng,Yan-Lin Liu,Ji-Lin Zhang,De-Hui Sun,Jia-Zuan Ni
In this work, novel magnetic polymeric core–shell structured microspheres with immobilized Ce(IV), Fe 3 O 4 @SiO 2 @PVPA-Ce(IV), were designed rationally and synthesized successfully via a facile route for the first time. Magnetic Fe 3 O 4 @SiO 2 microspheres were first prepared by directly coating a thin layer of silica onto Fe 3 O 4 magnetic particles using a sol–gel method, a poly(vinylphosphonic acid) (PVPA) shell was then coated on the Fe 3 O 4 @SiO 2 microspheres to form Fe 3 O 4 @SiO 2 @PVPA microspheres through a radical polymerization reaction, and finally Ce(IV) ions were robustly immobilized onto the Fe 3 O 4 @SiO 2 @PVPA microspheres through strong chelation between Ce(IV) ions and phosphate moieties in the PVPA. The applicability of the Fe 3 O 4 @SiO 2 @PVPA-Ce(IV) microspheres for selective enrichment and rapid separation of phosphopeptides from proteolytic digests of standard and real protein samples was investigated. The results demonstrated that the core–shell structured Fe 3 O 4 @SiO 2 @PVPA-Ce(IV) microspheres with abundant Ce(IV) affinity sites and excellent magnetic responsiveness can effectively purify phosphopeptides from complex biosamples for MS detection taking advantage of the rapid magnetic separation and the selective affinity between Ce(IV) ions and phosphate moieties of the phosphopeptides. Furthermore, they can be effectively recycled and show good reusability, and have better performance than commercial TiO 2 beads and homemade Fe 3 O 4 @PMAA-Ce(IV) microspheres. Thus the Fe 3 O 4 @SiO 2 @PVPA-Ce(IV) microspheres can benefit greatly the mass spectrometric qualitative analysis of phosphopeptides in phosphoproteome research.
研究领域:
分析化学
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蛋白质组学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
·
IF 8.6
Mingyang Liu,Dan Zou,Donghai Yu,Shaoji Xiang,Yuefeng Deng,Ji Chen,Jichang Xiao
Cyanex923 (a mixture of four trialkyl (hexyl and octyl) phosphine oxides) has been extensively employed in the recovery of cerium (Ce(IV)) and fluorine (F), as well as the separation over thorium (Th(IV)) from bastnaesite. However, rigorous production conditions and involvement of highly toxic raw materials (PH 3 ) have been critical problems to be solved during the synthesis of Cyanex923. Meanwhile, its extraction performance remains to be improved. Therefore, we attempted to adjust the feed ratio to increase the proportion of short carbon chain components, successfully synthesized a novel extractant (P113, a mixture of four trialkyl (hexyl and octyl) phosphine oxides) with contents of each component different from Cyanex923 using an environmentally benign method. The comparison with Cyanex923 revealed obvious improvement of P113 in terms of extraction efficiency, selectivity and saturation capacity. The extraction efficiency and saturation capacity of Ce(IV) were increased by 10% and 10 g L -1 , respectively. Separation factor of Ce(IV)/Th(IV) was increased from 16 to 27 at 2 mol L -1 H 2 SO 4 . Furthermore, P113 presented excellent regenerability. The superiority of P113 was theoretically explored using the density functional theory (DFT) and polarizable continuum model (PCM), and the results indicated that THPO (trihexyl phosphine oxide) had lower extraction phase transfer energy than TOPO (trioctyl phosphine oxide) from aqueous phase to organic phase. The comprehensive evaluation of P113 demonstrated the feasibility employed in the recovery of Ce(IV)-F and the separation of Th(IV) from bastnaesite, which advanced industrial application of the novel extractant, and held significant value for the utilization of resources and environmental protection.
研究领域:
化学工程
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环境科学
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材料科学
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产品关联
DOI
高影响因子
Nanoscale
·
2021
·Vol. 13
·期 4
·2519-2526
·
IF 7.79
Yilun Sheng,Zhongnan Huang,Qi Zhong,Haohua Deng,Mingchun Lai,Yu Yang,Wei Chen,Xinghua Xia,Huaping Peng
Sulfur quantum dots (SQDs) are a new kind of functional nanomaterial, but several challenges still exist in relation to their synthesis and application, such as low-yield and time-consuming synthetic methods, low photoluminescence quantum yields (PLQYs), and the non-selectivity of their detection mechanisms. Herein, we report the drastic enhancement of the fluorescence performance of water-soluble SQDs via the one-pot synthesis of size-focusing QDs using ultrasound microwave radiation. The synthetic period has been greatly shortened to 2 h via the present process. Notably, the proposed SQDs exhibit a highly stable emission wavelength with a record high PLQY of 58.6%. The mechanistic study indicates that size-focusing is a key factor relating to the proposed high-performance SQDs. As they also have robust stability, the proposed SQDs show a wide range of potential applications. Inspired by the characteristic properties of the SQDs and specific analytes, a simple SQD-based fluorescence sensing platform, via a redox-reaction-mediated mechanism, has been successfully developed for the rapid and selective detection of Ce(IV). In addition, this system has been effectively applied to some Ce(IV)-related biological assays, such as ascorbic acid (AA) analysis. This work is an important breakthrough in the SQD field, opening up avenues for solving the challenging problems relating to SQD-based probes, enriching the fundamental understanding of them, and greatly extending their applications, especially in biomedicine.
研究领域:
材料科学
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分析化学
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生物医学
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产品关联
DOI
PubMed
高影响因子
Colloid and Interface Science Communications
·
2020
·
IF 2.831
Ziyang He,Qiang Huang,Liucheng Mao,Hongye Huang,Meiying Liu,Junyu Chen,Fengjie Deng,Naigen Zhou,Xiaoyong Zhang,Yen Wei
In this study, we developed a rapid microwave-assisted Diels-Alder reaction to prepare hydroxylated ND; then the ionic copolymers functionalized ND composites were obtained through direct surface-initiated Ce(IV)/HNO 3 redox polymerization by utilization of the hydroxyl groups and the resultant ND based composites were utilized for adsorptive removal of copper ions. The results demonstrated the Pseudo-second-order model can well describe the adsorption kinetic of ND-poly(AA -co- MPC) and it has been confirmed that the adsorption behavior is initiative and endothermic and related thermodynamic parameters (△G, △H, △S). The Langmuir isotherm model is better to describe the adsorption isotherms and the temperature experiment results show the best pH environment is pH 7–9. The results above demonstrated the ND-poly(AA -co- MPC) prepared by Ce(IV)/HNO 3 redox polymerization shows great potential in environmental treatment and remediation and the easy, mild, hydrous polymerization strategy can be exampled in the field of material surface modification.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2021
·
IF 3.498
Chao Wang,Jinshan Zhang,Xinxin Zhu
Incorporation of lanthanide atom into the titanium−oxo cluster structure is an effective strategy for exploring novel photoelectrode materials. Herein, we synthesized and characterized three lanthanide-doped titanium−oxo clusters (Ln-TOCs): [Ti 4 La(μ 3 -O) 3 (O i Pr) 2 (C 6 H 5 COO) 11 ]·3CH 3 CN ( 1 ), [Ti 4 Eu 2 (μ 3 -O) 4 (acac) 2 (C 6 H 5 COO) 13 ] ( 2, acac = acetylacetonate), and [Ti 7 Ce(μ 2 -O) 2 (μ 3 -O) 5 (O i Pr) 2 (C 6 H 5 COO) 15 ]·CH 3 CN ( 3 ). These Ln−TOCs display strong UV-light absorption and extended visible light absorption, which can be ascribed to the doping of lanthanides and benzoates. As electrode precursors for photoelectric responses, these Ln doped clusters exhibit clear photocurrent responses. Moreover, cluster 3 shows the highest photocurrent intensity because of Ce(IV)/Ce(III) redox reaction . This work not only enriches the Ln−TOCs family, but also promotes the development of novel titanium-based photoelectric active materials.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
CHEMISTRY & BIODIVERSITY
·
2023
·Vol. 20
·期 3
·e202200813
·
IF 2.9
Kaiwen Li,Jie Wang,Zizhen Huang,Chunxia Tan
Angelica Sinensis polysaccharide cerium (ASP−Ce) was prepared by Angelica Sinensis polysaccharide (ASP) and cerium ammonium nitrate (NH 4 ) 2 Ce(NO 3 ) 6 . and its morphology, and solid structure was investigated. The antioxidant activity of the ASP−Ce complex in vitro was evaluated. The antioxidant activity of ASP−Ce complex in vitro was evaluated by the scavenging activity of 2,2-diphenyl-1-picrylhyrazyl radical (DPPH), hydroxyl radical (⋅OH) and superoxide anion radical ( ⋅). The results showed that the ASP−Ce had the more ordered structure for inserting the Ce 4+ into the polymer chain of ASP and there was little change in the conformation of the polysaccharide from Ce 4+ . Three free radical scavenging experiments proved that ASP−Ce had better antioxidant capacity than of ASP, especially on DPPH, and then on ⋅. The scavenging rate of ASP−Ce at 1.0 mg/mL on DPPH reached 71.6 %. Therefore, these results provide references for the further development and utilization of rare earth-polysaccharide.
研究领域:
药理学
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材料科学
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生物化学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
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2016
·Vol. 6
·期 101
·98945-98951
·
IF 3.289
Ni Xue,Luyan Wang,Meishan Pei,Youjun He,Yankai Du,Wenjuan Guo
A new adsorbent, sodium polyacrylate (PAANa) grafted onto the surface of bentonite (Bent), was successfully synthesized by a facile and green Ce(IV)-redox process, for the removal of Pb2+ from aqueous solutions. The results indicate that by this method the original layered structure of the clay can be protected along with its cation exchange capability (CEC), leading to an improved adsorption capacity. The adsorbent (Bent–PAANa) was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectrometry (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and N2 adsorption–desorption isotherm studies. Subsequently the effects of pH, initial concentration and contact time on the adsorption of Pb2+ from aqueous solutions were investigated. The results of the batch experiments specifically indicate that a high adsorption capacity (149.62 mg g−1) of Bent–PAANa for the removal of Pb2+ was obtained at pH = 5, C0 = 1100 mg L−1 and 25 °C. Furthermore, the adsorption kinetics of Pb2+ onto the composite followed a pseudo-second-order kinetic model. The adsorption data fitted better to a Freundlich adsorption isotherm than a Langmuir adsorption isotherm hence confirming multilayer adsorption.
研究领域:
环境科学
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材料科学
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吸附化学
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水污染控制
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功能材料
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Xiaoxia Jiang,Xiangling Zhang,Yong Wang,Xuhao Li,Xinxian Zhang,Shilong Cao,Jiangwei Chen,Chen Wang,Zhouying Xu,Yu Jiang
Ce(Ⅳ) markedly enhanced the electrochemical removal rate of M. aeruginosa . • Simultaneous removal of algae (92.5%) and MC-LR (94.1%) was achieved in 60 min. • Kinetic analysis indicates a strong synergistic effect in E-Ce (IV) system. • Multi-target cellular damage drives population-level algal inactivation. The frequent occurrence of cyanobacterial blooms poses severe challenges to aquatic environmental safety and conventional water treatment processes. While electrochemical oxidation is operationally simple, its efficiency in algal cells removal is often limited by low current efficiency and prevalent side reactions in conventional systems. This study developed a Ce(IV)-assisted electrochemical system, E-Ce(IV), incorporating Cerium(IV) (Ce(IV)) to boost the removal of Microcystis aeruginosa ( M. aeruginosa ). A synergistic effect between Ce(IV) chemical oxidation and direct electro-oxidation was identified, significantly improving algal removal performance. Under optimal conditions, the E-Ce(IV) system achieved a high removal rate of 92.5% within 60 min, markedly superior to the Ce(IV) alone system (4.68%) and direct electro-treatment (DET) system (57%). Mechanistic investigations revealed that the E-Ce(IV) system synergistically disrupted cellular membrane integrity, as well as their photosynthetic and antioxidant capacities. Concurrently, the system degraded algal organic matter, achieving a 94.1% degradation rate of the cyanotoxin microcystin-LR (MC-LR). Further assessment of different typical water matrices and bodies demonstrated the feasibility of the system for algal control under acidic conditions. As a proof-of-concept batch treatment process under acidic, sulfate-supported conditions, this work extended the E-Ce(IV) process from degrading organic pollutants to removing algal cells, offering preliminary insights into its multi-target synergistic inactivation mechanism. The simultaneous efficient degradation of cyanotoxins suggests that this approach may offer a potential strategy for algal bloom control when applied with mild pre-acidification and sulfate electrolyte supplementation. Download: Download high-res image (341KB) Download: Download full-size image
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DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Yi Cui,Hongye Huang,Meiying Liu,Junyu Chen,Fengjie Deng,Naigen Zhou,Xiaoyong Zhang,Yen Wei
Cellulose nanocrystals (CNCs) are a novel type of natural nanomaterials that have attracted tremendous research interest for various applications especially in the biomedical fields owing to their natural origin, biodegradable potential, remarkable biocompatibility and massive reactive hydroxyl groups. In this work, a novel strategy has been developed for fabrication of luminescent CNCs with aggregation-induced emission (AIE) feature for the first time through a facile one-step Ce(IV) redox polymerization for direct surface grafting of AIE dye (PhE) and hydrophilic monomer Poly(ethylene glycol) monomethyl ether acrylate (PEGMA) on CNCs. Various characterization techniques would demonstrate the successful preparation of resultant CNC-PhE-PEGMA with uniform nanoscale size, remarkable fluorescent properties and extremely low cytotoxicity. Furthermore, compared with conventional modification strategy of CNCs, Ce(IV) redox polymerization only need moderate temperature and can operate in aqueous solution utilizing surface hydroxyl groups of CNCs as polymerization activity sites. More importantly, CNC-PhE-PEGMA show desirable fluorescent properties and can be used for cell dyeing, indicating their potential for biomedical applications.
研究领域:
纳米医学
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生物材料学
·
高分子化学
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细胞生物学
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诊断影像学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Xuwen Chen,Peixin Wang,Fei Peng,Zhou Zhou,Michael Gatheru Waigi,Wanting Ling
Substituted polycyclic aromatic hydrocarbons (SPAHs) are being intensively investigated, considering their high toxicity. Additionally, the mechanism of the effect of substituents on the removal of SPAHs and the activation of Ce(III) ions on peroxymonosulfate (PMS) have not been explored. Here we evaluated the removal efficiency of SPAHs in the oxidation system constructed by Ce(Ⅲ) ions and PMS, with emphasized the effect of substituents on SPAHs degradation. Ce(Ⅲ) has high catalytic performance for PMS, and the degradation percentage of all pollutants was higher than 92%. The significantly negative correlation between the reaction rate constants of SPAHs and the highest occupied molecular orbital-the lowest unoccupied molecular orbital gap, confirms that substituents lead to the differences in the degradation of SPAHs. The generation of reactive oxygen species (SO 4 •− , • OH, and 1 O 2 ) is based on the electron transfer between Ce(Ⅲ) and PMS, and the contribution of ROS to substituted naphthalene varies due to the role of substituents. The Ce(Ⅳ)/Ce(Ⅲ) cycle accelerates the activation of PMS. Based on the transformation products and condensed Fukui function, the possible degradation pathways are inferred. In addition, inorganic anions and organic matter have little effect on the Ce(Ⅲ)/PMS system, which is a prerequisite for applying this system to real-world waste-water for SPAHs removal. This work demonstrates a new model of the degradation mechanism of SPAHs in the Ce(Ⅲ)/PMS system.
研究领域:
环境化学
·
水处理
·
污染物降解
·
催化
✓ 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）