CHEMOSPHERE
·
2018
·
IF 4.427
Zhipan Wen,Yalei Zhang,Gang Cheng,Yingru Wang,Rong Chen
In this study, nanosized ordered magnetic mesoporous Fe-Ce bimetal oxides (Nanosized-MMIC) with highly well-ordered inner-connected mesostructure were successfully synthesized through the KIT-6 template method. This Nanosized-MMIC displayed excellent adsorption capacities for As(V), Cr(VI) and AO7, and the corresponding calculated maximum adsorption capacities of material were 111.17, 125.28 and 156.52 mg/g, respectively. As(V) and Cr(VI) removal by Nanosized-MMIC were slightly dependent on the ionic strength but highly solution pH-dependent, the coexistent silicate and phosphate ions competed remarkably with both As(V) and Cr(VI) for the adsorption active site. Mechanisms indicated As(V) and Cr(VI) formed inner-sphere complexes on Nanosized-MMIC interface via the electrostatic interaction and surface complexation, while the total organic carbon (TOC) change demonstrated that AO7 could be removed completely and no organic intermediates formed through the adsorption process. In addition, Nanosized-MMIC also possessed superior adsorption performance in As(V)/Cr(VI)-AO7 binary systems, and the reusable and regeneration properties indicated that the obtained nanomaterials could maintain at a comparatively high level after several recycling. Finally, fixed-bed experiments suggested the Nanosized-MMIC was expected to have a promising excellent nano-adsorbent with high application potential for co-existed toxic heavy metals and organic dyes removal in practical wastewater treatment .
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Kunlun Yang,Jiasheng Zhou,Zimo Lou,Xurui Zhou,Yuanli Liu,Yizhou Li,Shams Ali Baig,Xinhua Xu
Fe-Mn binary oxides (FMBO) with different Fe/Mn molar ratios were synthesized to investigate the influence of the changed iron oxides forms and the manganese oxide on the removal efficacy of Sb(V) from water under neutral pH. The characterization tests by electron microscopy and X-ray diffraction spectroscopy showed that FMBO gradually changed from granular to aciculiform or fibrous structure and their crystalline degree increased with the decreasing Mn content. The ferric oxides in FMBO transformed from 2-L ferrihydrite-like substance with amorphous state to goethite or lepidocrocite with high crystalline as the amount of added Mn reduced during the preparation. The Sb(V) adsorption rates and capacities of FMBO both decreased and the influence of pH on the Sb(V) removal became greater with the decreasing Mn oxide content. All the results indicated that the addition of Mn could greatly improve the Sb(V) removal performance of FMBO through promoting the formation and preventing the transformation of amorphous ferric oxide in FMBO during the preparation, whose Sb(V) adsorption ability was confirmed to be stronger than that of goethite or lepidocrocite. Further exploration indicated the complexation reaction between Sb(V) and amorphous ferric oxide played a key role in Sb(V) adsorption by FMBO. Meanwhile, FMBO with a Fe/Mn molar ratio of 3:1 (FMBO 3 ) exhibited excellent regeneration performance and the amorphous iron oxide in FMBO 3 gradually transformed into crystalline iron oxide during the consecutive recycling.
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JOM
·
2016
·Vol. 69
·期 10
·1950-1957
·
IF 1.798
Shi Qihua,Zhang Yimin,Liu Tao,Huang Jing,Liu Hong
To improve separation of V(IV) and Al(III) from aluminum-rich sulfuric acid leaching solution of stone coal, the two-stage separation by crystallization and solvent extraction methods have been developed. A co-extraction coefficient ( k ) was put forward to evaluate comprehensively co-extraction extent in different solutions. In the crystallization stage, 68.2% of aluminum can be removed from the solution. In the solvent extraction stage, vanadium was selectively extracted using di-2-ethylhexyl phosphoric acid/tri-n-butyl phosphate from the crystalline mother solution, followed by H 2 SO 4 stripped efficiently. A V 2 O 5 product with purity of 98.39% and only 0.10% Al was obtained after oxidation, precipitation, and calcination. Compared with vanadium extraction from solution without crystallization, the counter-current extraction stage of vanadium can be decreased from 6 to 3 and co-extraction coefficient ( k ) decreased from 2.51 to 0.58 with two-stage separation. It is suggested that the aluminum removal by crystallization can evidently weaken the influence of aluminum co-extraction on vanadium extraction and improve the selectivity of solvent extraction for vanadium.
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TALANTA
·
2016
·
IF 4.035
Qingxiang Zhou,Zhenwen Zheng,Junping Xiao,Huili Fan
The magnetic nanomaterial Fe@polyethyleneimine (Fe@PEI) was successfully synthesized and used as an effective adsorbent material for magnetic solid phase extraction(MSPE) of As(III) and As(V) from water samples. Fe@SiO 2 nanoparticles were prepared by one pot synthetic method using a borohydride reduction method, then modified with (3-chloropropyl)trimethoxysilane to obtain Fe@SiO 2 -Cl by chloropropylation, which was reacted with PEI to achieve Fe@polyethyleneimine (Fe@PEI). The microstructure and morphology of Fe@PEI were characterized by transmission electron microscoscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD). The experimental results showed that Fe@PEI demonstrated excellent adsorption for As(III) and As(V). Based on this fact, the determination method for these two arsenic species earned good limits of detection (LODs) of 0.002 μg L −1 and wide calibration curves in the concentration range from 0.008 to 0.2 μg L −1 . The precisions of As (III) and As (V)were 1.95% and 2.55% (RSD, n =6), respectively. The proposed method was validated with real samples and the spiked recoveries were in the range of 82.7–98.3% and the accuracies were in the range of 2–13.3%. The results demonstrated that the developed MSPE method had good advantages such as simplicity, rapid separation, low cost, easy to reuse and high-quality analytical performances, which made it attractive for rapid and efficient extraction of inorganic arsenic species in the environmental water samples.
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MATERIALS CHARACTERIZATION
·
2016
·
IF 2.383
Zhaobing Cai,Guo Jin,Xiufang Cui,Zhe Liu,Wei Zheng,Yang Li,Liquan Wang
Ni-Cr-Co-Ti-V-Al high-entropy alloy coating on Ti-6Al-4V was synthesized by laser surface alloying. The coating is composed of a B2 matrix and (Co, Ni)Ti 2 compounds with few β-Ti phases. Focused ion beam technique was utilized to prepare TEM sample and TEM observations agree well with XRD and SEM results. The formation of HEA phases is due to high temperature and rapid cooling rate during laser surface alloying. The thermodynamic parameters, ΔH mix , ΔS mix and δ as well as Δχ, should be used to predict the formation of the BCC solid solution, but they are not the strict criteria. Especially when Δχ reaches a high value (≥ 10%), BCC HEA will be partially decomposed, leading to the formation of (Co, Ni)Ti 2 compound phases.
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Advanced Sustainable Systems
·
2024
·Vol. 8
·期 12
·2400429
·
IF 6.5
Baoqian Yang,Xinru Wu,Zhengjie Su,Benjamin Kunkadma Insua,Pengkun Zhang,Dong-Hau Kuo,Lulu Gao,Xinde Bao,Dongfang Lu,Jinguo Lin,Xiaoyun Chen
V/S co-doped SnO 2 bimetal sulfur-oxides catalysts labeled as (Sn,V) 1- x (S,O) 2- y or (SnVSO) with heterovalent state and oxygen vacancy defect are prepared via a green and facile method. The presence of SnVSO in the heterovalent states of Sn 4+ /Sn 2+ and V 5+ /V 4+ facilitates the rapid transfer of the electrons. It improves the electronic charge lifetime, accelerating the efficiency of the catalytic reduction of pollutants. The V/S co-doped SnO 2 regulates the bandgap energy structure. The hydrazine adjusts the heterovalent metal states to reduce Sn 4+ to Sn 2+ and V 5+ to V 4+ . Also, it introduces oxygen vacancies to SnVSO to maintain the charge equilibrium and increase the active surface reactive sites, which enhance the catalytic activity. The SnVSO-3 prepared with 0.4 mL hydrazine exhibits excellent catalytic activity, which wholly reduces 20 ppm of 100 mL methyl orange (MO), rhodamine B (RhB), methylene blue (MB), hexavalent chromium (Cr 6+ ), and 4-nitrophenol (4-NP) within 6 min. In addition, the SnVSO-3 also has good stability after repeated 6 runs with a reduction efficiency of 96.8%. Therefore, the V/S co-doped SnO 2 sulfur oxide catalysts have a promising potential for reducing Cr 6+ and organic pollutants.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·
IF 3.5
Hongbin An,Ruoyu Chen,Saisai Li,Lingfeng Huang,Wenbao Jia,Qianfang Wu,Aiqing Mao
Powder synthesis is crucial for achieving the densification and facilitating widespread applications of high entropy carbide (HEC). Specifically, the production of fine particle-size powders is essential to enhance the densification of HECs. Consequently, this paper proposes the molten salt method for synthesizing HEC powders. The synthesis process successfully yielded (Ta Nb Ti V) C powders with a particle size of only 0.44 µm at 1400°C, exhibiting a uniform distribution of each element. Subsequent densification of (Ta Nb Ti V) C within the 1700–1900°C temperature range was carried out using spark plasma sintering. It was observed that as the densification temperature increased, the densification and mechanical properties of HEC significantly improved. This study presents innovative ideas for the preparation of HEC at lower temperatures.
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FOOD HYDROCOLLOIDS
·
2025
·
IF 12.4
Zihang Yan,Sixing Lai,Suqi Yang,Kefan Ouyang,Yuanyuan Feng,Hao Hu,Xing Hu,Hua Xiong,Qiang Zhao
Active gelatin-based films (CUR-PLLF) incorporating V-type granular starch-curcumin complex (VGS-C) and ε-polylysine (PLL) were developed for the short-term refrigerated preservation of salmon fillets. The experiment demonstrates that the composite film (CUR-PLLF), exhibits an enhanced elongation at break by 36.67%, accompanied by a marked increase in DPPH radical scavenging activity from 2.40% to 9.07%. The water vapor permeability and oxygen permeability of CUR-PLLF film were reduced by 14.02% and 18.09%, respectively, and it can be completely degraded in soil within 14 d, demonstrating significant environmental advantages. In salmon fillets refrigeration experiments, CUR-PLLF inhibited bacterial proliferation and fat oxidation, resulting in a 17.25% reduction in Total volatile base nitrogen level, which were below the spoilage threshold of 25 mg/100 g. Additionally, the content of thiobarbituric acid-reactive substances decreased by 30.77%. These findings suggest that the developed gelatin-based film exhibits comprehensive advantages in antibacterial properties, antioxidant activity, and biodegradability, offering an efficient and environmentally friendly solution for the preservation of salmon during short-term refrigeration.
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NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 47
·20085-20094
·
IF 2.7
Xia Jinming,Li Ruiyi,Li Zaijun,Gao Mingjie
Tantalum oxide has emerged as an important electrode material for supercapacitors due to its multiple redox capabilities, high capacitance and structural stability, but the low electrical conductivity prevents its practical applications. This study reports the synthesis of Co- and V-doped Ta1.1O1.05 using tryptophan- and aspartic-acid-functionalized boron-doped graphene quantum dots (DWB-GQD). Ta5+, V5+ and Co3+ were combined with DWB-GQD to form water-soluble complexes. The complex was then soaked in cotton, dried and annealed at 850 °C in an N2 atmosphere. The resulting Ta1.1O1.05 nanocrystals showed a cube-like nanostructure. The self-doping of low-valent Ta, V and Co species induced the production of oxygen vacancies. The presence of oxygen vacancies narrowed the bandgap and created new electron transfer pathways. The graphene surface modification accelerated the electron transfer from Ta1.1O1.05 to graphene and improved the structural stability. The unique structure significantly improved the conductivity and led to a wide safe voltage window of 1.9 V. The symmetrical supercapacitor with Co/V–Ta1.1O1.05@DWB-GQD electrodes and a 1 M Li2SO4/PVA gel electrolyte exhibited high specific capacitance (560.9 F g−1 at a current density of 1 A g−1), high-rate capacitance (365.55 F g−1 at a current density of 10 A g−1), cycling stability (99.5% capacitance retention over 10 000 cycles), and energy density (140.63 W h kg−1 at a power density of 475 W kg−1). Based on these results, the soft supercapacitor shows a wide application prospect in wearable electronic devices.
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Hongjie Chen,Yixuan Su,Yucong Chen,Minghan Bao,Mingjun Wu,Junyang Chen,Weitao Chen,Qiang Ru
The inherent low electronic conductivity of NASICON-type Na4MnV(PO4)3 (NMVP) impedes its use in advanced energy storage. Herein, we address this challenge by introducing a citric acid-derived carbon coating to elevate the material’s conductivity and electrochemical performance. By precisely tailoring the configuration of the carbon layer, we fabricated Na4MnV(PO4)3 encapsulated by a carbon coating (NMVP@C) and constructed a 3D hierarchical architecture with incorporated V(III) and Mn(II) states, which prompts the reversible redox reaction, augments Na+ storage capability, and mitigates volume expansion during cycling. The optimal cathode manifests superior rate capability and a long life span with 107.5 mA h g–1 at 1 C and 82.5% capacity retention over 5000 cycles at 20 C. The hard carbon//NMVP@C full cell confirms practical applicability with good electrochemical performance. This work underscores the pivotal interplay among the carbon layer, Na+ mobility, and structural integrity in NASICON cathodes, offering a pathway to develop high-performance and cost-effective cathode materials for sodium-ion batteries.
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FREE RADICAL BIOLOGY AND MEDICINE
·
2025
·
IF 8.2
Zhiyu Qian,Xinyue Zhang,Jiahua Huang,Yumin Hou,Chunlan Hu,Yirui Cao,Nannan Wu,Tongyu Zhu,Guoyi Wu
Renal ischemia-reperfusion injury (IRI), a common complication following kidney transplantation and partial nephrectomy, is the leading cause of renal dysfunction with limited treatment. Excessive cellular iron accumulation drives lipid peroxidation and activates pathways associated with ferroptosis, which has been implicated in renal IRI. However, the regulatory mechanisms of cellular iron metabolism and its relationship with ferroptosis during ischemia-reperfusion (IR) remain unclear. In this study, in vitro OGSD-R (oxygen, glucose, and serum deprivation-restoration) models and in vivo IR models were employed to investigate alterations in iron metabolism, ferroptosis, and the underlying molecular mechanisms using immunofluorescence, immunoblotting and biochemical testing. We identified glucose deprivation-restoration (GD-R) as a key trigger of cellular iron overload under renal IR condition. Mechanistically, GD-R-induced iron overload is driven by the dysfunction of vacuolar ATPase (V-ATPase)-mammalian target of rapamycin (mTOR) pathway. Inactivation of mTOR results in lysosomal iron releases via two-pore channel 2 (TPC2) and ferritin degradation through ferritinophagy. This process elevates intracellular iron levels, thereby promoting ferroptosis in renal IRI. Targeting cellular iron metabolism effectively alleviates renal IRI. These findings highlight the critical role of glucose metabolism and V-ATPase-mTOR pathway in the regulation of iron homeostasis and ferroptosis during renal IRI, and establish a mechanistic link among glucose metabolism, iron overload and ferroptosis, providing potential therapeutic targets for renal IRI.
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Journal of Materials Chemistry C
·
2025
·Vol. 13
·期 8
·4145-4152
·
IF 5.1
Qingwei Zhou,Hansheng Li,Fan Wu,Dan Chen,Fang Luo,Chucai Guo,Zhihong Zhu
Controlling the interface energy level and simultaneously passivating the surface defects of perovskite films are crucial for improving the efficiency and stability of perovskite solar cells (PSCs). In this study, two-dimensional MXene nanoflakes grafted with MoS2 quantum dots (QD) are utilized as multifunctional interlayers at the interface of perovskite/carbon in all-inorganic CsPbBr3 PSCs, aiming to enhance their performance and stability. MoS2 QDs are grafted onto the surface of MXene to use the unsaturated S atoms at the edge of MoS2 to passivate the under-coordinated Pb2+ in perovskite films and reduce the interface charge recombination. The MoS2-grafted MXene interlayer can also tune the energy level of perovskite films and provide an efficient pathway for hole transfer, thereby reducing open-circuit voltage (Voc) deficit and improving device performance. Moreover, the ion diffusion from the perovsikte layer to the carbon electrode is significantly suppressed due to the passivation of perovskite interface defects and the formation of isolation layers by the MoS2-grafted MXene interlayers. As a result, the optimized device exhibits a champion efficiency of 10.70% with an ultrahigh Voc of 1.701 V and significantly improved stability under persistent light irradiation and humidity (80%) for a remarkable 50 day period.
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