CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Huanyu Zhou,Fan Yu,Minghui Qiu,Xiaowei Da,Xianfu Chen,Kaiyun Fu,Yiqun Fan
A rapid co-sintering strategy is developed for CeO 2 nanofiltration membranes. • The membrane exhibits an ultra-narrow pore size distribution. • The membrane achieves a U/V separation factors of 326 in natural seawater. • The permeance reaches 21.6 L·m −2 ·h −1 ·bar −1 in natural seawater. • The strategy cuts fabrication time to 0.7 h and reduces energy consumption by 98.8%. Extracting uranium from seawater is essential for the sustainable development of nuclear energy. The highly selective uranium extraction remains challenging due to the extreme physicochemical similarity between uranium (U) and vanadium (V). Despite the sub-nanometer sieving capability of ceramic nanofiltration membranes, the conventional sintering required for structural integrity inevitably broadens the pore size distribution, thereby compromising selectivity toward closely sized ion pairs. This work proposes a rapid co-sintering (Co-RTP) strategy that utilizes radiation-induced ultra-fast heating and an adaptive co-sintering mechanism to construct a uniform CeO 2 selective layer within minutes, achieving a narrow pore size distribution (PSD) with a coefficient as low as 1.097. This ultra-narrow PSD effectively intensifies the U/V separation. In natural seawater, the membrane achieves a remarkable U/V separation factor of 326 and a permeance of 21.6 L·m −2 ·h −1 ·bar −1 . Moreover, the route reduces fabrication time from 110.6 h to 0.7 h and lowers energy consumption by 98.8%. This rapid co-sintering method provides a simplified and efficient fabrication route for precision ceramic membranes, and the resulting CeO 2 membrane holds great promise for challenging precision separations such as uranium extraction from seawater. Download: Download high-res image (222KB) Download: Download full-size image
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高影响因子
JOURNAL OF ENERGY ENGINEERING
·
2017
·Vol. 143
·期 5
·04017051
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IF 1.944
Qian Xu,Liyu Qin,Huaneng Su,Li Xu,Puiki Leung,Chunzhen Yang,Huaming Li
Compared with conventional aqueous electrolytes, deep eutectic solvents (DES) have been used as the electrolytes of flow batteries for their unique merits, including a wide electrochemical window, ease in preparation, and low vapor pressure. However, the electrochemical and physical characteristics of DES are sensitive to the change of temperature, and there are few related studies. An urgent need exists for research into temperature adaptability of flow batteries with DES electrolytes before they can be utilized practically. This paper studies the electrochemical and transport characteristics of vanadium ions in a DES by varying the operating temperatures. The cyclic voltammetry curves indicate that vanadium ions show a quasi-reversible redox reaction in DES. With the rise of temperature from ambient temperature to 55°C, the gap between oxidation and reduction peaks decreases from 0.271 to 0.248 V at a scan rate of 100 mV/s. Both the oxidation and the reduction peak current densities of V(II)/V(III) have a similar incremental trend. Conductivity increases from 2.2 mS/cm at ambient temperature to 11.16 mS/cm at 55°C, whereas the viscosity of DES with vanadium ions decreases sharply. The results prove that operating temperature has a vital effect on the electrochemical reaction and transport characteristics of V(II)/V(III) redox couple in DES, and it deserves further study in cell performance.
研究领域:
电化学
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储能
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材料科学
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电池技术
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高影响因子
Materials
·
2023
·Vol. 16
·期 14
·5195
·
IF 3.4
Jun Yang,Jinbiao Pang,Xiaofang Luo,Laiyuan Ao,Qiang Xie,Xing Wang,Hongyu Yang,Xianzhong Tang
This work studied the phase constitution, bond characteristics, and microwave dielectric performances of Sr2TiO4ceramics. Based on XRD and Rietveld refinement analysis, pure tetragonal Ruddlesden–Popper type Sr2TiO4ceramic is synthesized at 1425~1525 °C. Meanwhile, the microstructure is dense and without porosity, indicating its high sinterability and densification. Great microwave dielectric performances can be obtained, namely anεrvalue of 39.41, and aQ × fvalue of 93,120 GHz, when sintered at 1475 °C. Under ideal sintering conditions, the extrinsic factors are minimized and can be ignored. Thus, the intrinsic factors are considered crucial in determining microwave dielectric performances. Based on the P–V–L complex chemical bond theory calculation, the largest bond ionicity, and proportions to the bond susceptibility from Sr–O bonds suggest that Sr–O bonds mainly determine the dielectric polarizability. However, the Ti–O bonds show lattice energy about three times larger than Sr–O bonds, emphasizing that the structural stability of Sr2TiO4ceramics is dominated by Ti–O bonds, and the Ti–O bonds are vital in determining the intrinsic dielectric loss. The thermal expansion coefficient value of the Sr2TiO4structure is also mainly decided by Ti–O bonds.Keywords:Sr2TiO4;microwave dielectric properties;P–V–L complex chemical bond theory
研究领域:
材料科学
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物理学
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Chang Liu,Zheng Chen,Nixian Qian,Yongqing Ma
Vanadium (V)-free and V-doped H 2 Ti 12 O 25 hollow spheres (HTOHSs) were first synthesised via vapour-thermal method at 290 °C using common chemicals and solvents, over super-critical temperature (243 °C) of ethanol (vapour source). Then, they were annealed at 600 °C under different processing conditions to obtain titanium dioxide (TiO 2 ) photocatalysts . All catalysts were characterised by means of XRD , SEM, TEM, XPS , UV–vis DRS, FT-IR, N 2 adsorbtion-desorbtion and fluorescence lifetime. Results indicated that after the treatment in air, V-free HTOHSs were transformed into open-ended hollow tubes with uniform length of ~5 µm and diameter of ~1 µm, and walls of hollow tubes consisted of aggregated nanosheets . Furthermore, HTOHS crystallised into anatase TiO 2 (white) phase. The treatment in N 2 atmosphere led to the breaking of longer tubes into shorter ones. In contrast, after the treatment in N 2 atmosphere or by reduction using NaBH 4 as a reductant, V-doped HTOHS resulted in the formation of anatase TiO 2 (black) samples and consisted of fewer tubes and more deformed spheres. In this study, fluorescence lifetime ( τ ) of photo-generated carriers corresponded well with the ratio of oxygen vacancy , indicating that oxygen vacancy dominates the lifetime even though it is very sensitive to many factors. The evolution of structure and morphology and photocatalytic mechanism were analysed and discussed.
研究领域:
材料科学
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环境科学
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高影响因子
MOLECULES
·
2020
·Vol. 25
·期 6
·1448
·
IF 3.267
Xi Huang,Zhenxiong Ye,Lifeng Chen,Xujie Chen,Caocong Liu,Yuan Yin,Xinpeng Wang,Yuezhou Wei
Every year, a large quantity of vanadium-containing wastewater is discharged from industrial factories, resulting in severe environmental problems. In particular, V(V) is recognized as a potentially hazardous contaminant due to its high mobility and toxicity, and it has received considerable attention. In this study, a silica-supported primary amine resin (SiPAR) was prepared by in-situ polymerization, and the V(V) adsorption from the solution was examined. The as-prepared resin exhibited fast adsorption kinetics, and it could attain an equilibrium within 90 min for the V(V) solution concentration of 100 mg/L at an optimum pH of 4, whereas the commercial D302 resin required a treatment time of more than 3 h under the same conditions. Furthermore, the maximum adsorption capacity of the resin under optimum conditions for V(V) was calculated to be 70.57 mg/g. In addition, the kinetics and isotherm data were satisfactorily elucidated with the pseudo-second-order kinetics and Redlich–Peterson models, respectively. The silica-based resin exhibited an excellent selectivity for V(V), and the removal efficiency exceeded 97% in the presence of competitive anions at 100 mmol/L concentrations. The film mass-transfer coefficient (kf) and V(V) pore diffusivity (Dp) onto the resins were estimated by mathematical modeling. In summary, this study provided a potential adsorbent for the efficient removal of V(V) from wastewater.Keywords:pentavalent vanadium;removal;silica-supported resin;mathematical modeling
研究领域:
环境科学
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化学工程
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Fujin Sun,Meng Liu,Biao Yuan,Jian He,Pan Wu,Changjun Liu,Wei Jiang
The separation and recovery of V(V) and Cr(VI) from solution can achieve the dual purpose of resource utilization and environmental protection. In this work, amorphous titanium-based microspheres with a large specific surface area of 574.86 m 2 /g were prepared by the simple hydrolysis of titanium alcohol. This adsorbent exhibited excellent adsorption of V(V) and Cr(VI), with maximum capacities of 153.2 and 54.21 mg/g, respectively. Most importantly, in V(V)/Cr(VI) mixed solution, selective adsorption of V(V) can be achieved by competitive adsorption. The Dubinin-Radushkevich isotherm model and Elovich kinetic model yielded the best fit for experimental data, which indicated the adsorption of V(V) and Cr(VI) onto titanium-based microspheres is a combination of chemical adsorption and physical adsorption. Selective adsorption can be achieved when sufficient V(V) was present in the V(V)/Cr(VI) mixed solution (pH 3), which is due to H 3 V 10 O 28 3− has the more negative values of E ads (-188.12 kJ/mol) and ΔG 0 (−40.72 kJ/mol). The column experiment showed promise for application in the continuous removal and separation of V(V) and Cr(VI) from wastewater to obtain qualified pure V(V) and Cr(VI) products. Through the adsorption of different concentrations of V(V)-Cr(VI) solutions, real vanadium leaching solution and real vanadium precipitation wastewater, the purification of high-concentration solutions and the treatment of low-concentration solutions could be realized.
研究领域:
环境科学
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材料科学
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高影响因子
Chemical Engineering Journal Advances
·
2023
·
IF 0
Mengsi Cheng,Ying Fang,Zhaoguang Yang,Xinghao Liu,Bo Qiu,Tong Zhang,Haipu Li,Wenbo Zhao
MIL-100(Fe) was modified by amino groups (MIL - 100(Fe) - NH 2 ) to enhance the removal of antimonate (Sb(V)) with low concentration (50−200 μg/L) from natural water through batch adsorption experiments. With the initial Sb(V) concentration up to 200 μg/L, the residual Sb(V) concentration after treated by MIL - 100(Fe) - NH 2 was only 3.52 ± 0.131 μg/L, lower than the drinking water standards (5 μg/L) in China, while that was much higher (94.2 ± 3.52 μg/L) after pristine MIL-100(Fe) treatment. Based on results of XPS analysis, and adsorption kinetics and isotherms, we concluded that Sb(V) substituted the terminal −OH groups of MIL-100(Fe) to form inner-sphere complexes by coordination reactions with Fe nodes and be adsorbed by hydrogen bonding as well. The grafted amino groups (−NH 2 ) adsorbed Sb(V) by hydrogen bonding and facilitated the coordination reactions between Sb(V) and Fe nodes. The higher K L value (0.0116 ± 0.00,118 L/μg) obtained by fitting with the Langmuir isotherm model, while that of unmodified MIL-100(Fe) was 4.74 × 10 −4 ± 5.85 × 10 −5 L/μg, also confirmed that the −NH 2 groups greatly enhanced the affinity between MIL-100(Fe) and Sb(V). Furthermore, MIL - 100(Fe) - NH 2 still worked nicely in a wide pH range (2 − 12), with varied ionic strength (0.05 µmol/ L −1.5 mol/L), coexisting ions (CO 3 2− , NO 3 − , SO 4 2− , Cl − , H 2 PO 4 − ), and even in the real water bodies. Additionally, MIL - 100(Fe) - NH 2 exhibited good reusability and low Fe leaching (99.92 μg/L). We hope MIL - 100(Fe) - NH 2 become a candidate for effective removal of Sb(V), even other heavy metals from natural waterbodies.
研究领域:
环境科学
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材料科学
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JOM
·
2024
·Vol. 76
·期 5
·2631-2644
·
IF 2.1
Ma Jianxiang,Zhang Xiaomin,Zhang Liang,Wu Junjie,Hua Xinrui,Guo Zhonglin,Wang Zhuang,Liu Bing,He Panyang,Chen Tianxing,Ma Lianjing,Ren Jinbin
In this paper, silicon/iron binary aerogel (shortened to HFGel in the following text) was prepared from industrial solid waste fly ash. Antimony in the simulated solution and mine antimony wastewater were adsorbed with HFGel, respectively. The results showed that (1) HFGel has a three-dimensional network structure consisting of spherical nanoparticles with a specific surface area of about 346.4 m 2 /g, a pore size of 4.42 nm, and a pore volume of 0.43 cm 3 /g. (2) The adsorption of Sb(V) relies on the functional Fe-OH. The maximum adsorption capacity of HFGel on Sb(V) was 58.82 mg/g. The adsorption of Sb(V) by HFGel followed the secondary adsorption kinetics and Langmuir adsorption isotherm model. (3) The adsorption efficiency of HFGel decreased from 93% to 80.4% after five cycles. (4) HFGel has excellent selective adsorption performance for antimony. When the concentrations of CO 3 2− , SO 4 2− and PO 4 3− were 300 mg/L, 500 mg/L, and 100 mg/L, respectively, the removal rates of Sb(V) were 91.9%, 89.9%, and 83.7%, respectively. (5) After a single oxidation-adsorption process, HFGel removed 99.2% of antimony from mine wastewater. The concentration of effluent is < 8 μg/L.
研究领域:
环境科学
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材料科学
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高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Caiyun Han,Jing Xie,Xize Min
Due to the non-degradable of heavy metal, adsorption has been extensively applied to abatement it. Most studies were focused on uptake metal ions via electrostatic attraction and ion exchange, and load molecule H 3 AsO 4 from strongly acidic wastewater was still challenging. To solve the problem, bimetallic La–Zr MOFs was facilely fabricated in this work, and the fcu topology structure of La-Zr MOFs was remained well under the investigate crystallization time and crystallization temperature. However, the crystallinity of the obtained La-Zr MOFs was influenced by the synthesized factors. The obtained La–Zr MOFs was employed as adsorbent to removal Cr(VI) and As(V), and the performance was evaluated by the batch experiment. The result indicated that the adsorption performance of Cr(VI) and As(V) was positively correlated with the crystallinity , and the optimal sample was 1LaUN 12 . From the XPS characterization, it was found that H 3 AsO 4 was successfully uptake over 1LaUN 12 surface, and the maximum monolayer adsorption capacity was 83.40 mgH 3 AsO 4 /g via ligand exchange and coordination reactions with La−OH and Zr−OH. In addition, the sample 1LaUN 12 also exhibited the excellent Cr(VI) load performance, and the maximum monolayer adsorption capacity of Cr(VI) was 222.5 mg/g. Above 40% Cr(VI) was reduced to Cr(III) by amino groups, and immobilized over the surface of 1LaUN 12 . Eventually, 1LaUN 12 displayed a good structural stability in the acidic medium, which was in favor of removing Cr(VI) and As(V) efficiently from strongly acidic solutions.
研究领域:
环境科学
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材料科学
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2015
·
IF 1.964
Xin Zhao,Lei Huang,Hongrui Li,Hang Hu,Jin Han,Liyi Shi,Dengsong Zhang
Different transition metals were used to modify V 2 O 5 -based catalysts (M-V, M = Cu, Fe, Mn, Co) on TiO 2 via impregnation, for the selective reduction of NO with NH 3 . The introduced metals induced high dispersion in the vanadium species and the formation of vanadates on the TiO 2 support, and increased the amount of surface acid sites and the strength of these acids. The strong acid sites might be responsible for the high N 2 selectivity at higher temperatures. Among these catalysts, Cu-V/TiO 2 showed the highest activity and N 2 selectivity at 225–375 °C. The results of X-ray photoelectron spectroscopy, NH 3 -temperature-programmed desorption, and in-situ diffuse reflectance infrared Fourier transform spectroscopy suggested that the improved performance was probably due to more active surface oxygen species and increased strong surface acid sites. The outstanding activity, stability, and SO 2 /H 2 O durability of Cu-V/TiO 2 make it a candidate to be a NO x removal catalyst for stationary flue gas.
研究领域:
催化化学
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环境科学
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高影响因子
Animal Nutrition
·
2026
·
IF 8.3
Yu Wang,Yan Zhang,Liyun Wu,Chaoyue Li,Qiaozhen Chen,Dong Han,Haokun Liu,Zhimin Zhang,Shouqi Xie,Junyan Jin
As a precursor to creatine, guanidinoacetic acid (GAA) is widely recognized to enhance growth performance and flesh quality of animals, but the underlying molecular mechanism remains unclear. This study evaluated the effects of dietary GAA supplementation on growth performance, textural properties, and flavor constituents in gibel carp CAS V ( Carassius gibelio , CAS V). A total of 300 healthy gibel carp (5.01 ± 0.13 g) at 42 d of age were assigned randomly to 12 tanks (3 replicates per group, 25 fish per replicate). Fish were fed with a basal diet supplemented with graded levels of GAA (0%, 0.03%, 0.06%, and 0.12%) for 10 weeks. Results demonstrated that GAA supplementation significantly enhanced the specific growth rate (SGR) and crude protein content in gibel carp ( P < 0.05). It also enhanced muscle physicochemical attributes by increasing water holding capacity and hardness, along with boosting glycogen content and free glutamate level ( P < 0.05). Mechanistically, GAA promoted myofiber development by upregulating protein and gene expression of myogenic regulatory factors (MRFs), leading to increase myofiber density and a higher frequency of myofibers with diameters between 20 and 40 μm ( P < 0.05). Furthermore, GAA facilitated collagen synthesis to improve muscle hardness by activating the transforming growth factor-beta 1 (TGF-β1)/mothers against decapentaplegic homolog (SMADs) signaling pathway, upregulating transcript levels of tgf-β1 , col1α1 , col1α2 , and smad3 ( P < 0.05). Additionally, GAA increased inosine monophosphate (IMP) content in muscle ( P = 0.015), which was associated with enhanced expression of AMPD1 protein and upregulation of the adsl , pkm , and ckm genes ( P < 0.05). In conclusion, dietary GAA supplementation enhanced flesh quality of gibel carp via improving growth performance, nutrient deposition, texture characteristics, and flavor components.
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PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Wangjun Lin,Linfeng Peng,Hui Li,Tangfu Xiao,Jianqiao Wang,Nana Wang,Xiangting Zhang,Hanmo Zhang
Fe(II)-induced phase transformations of secondary iron minerals have attracted considerable attention due to their influence on antimony (Sb) mobility. However, Fe(II)-induced natural multicomponent secondary iron mineral (nmSIM) transformations and the corresponding repartitioning of Sb on nmSIM under acidic conditions upon Fe(II) exposure have not been systematically examined. Herein, we investigated the effect of Fe(II) on nmSIM mineralogy and Sb mobility in Sb(V)-bearing nmSIM at pH 3.8 and 5.6 at various Fe(II) concentrations over 15 d. The Sb(V)-bearing nmSIM phase transformation occurred under both strongly and weakly acidic conditions without Fe(II) exposure, while the presence of Fe(II) significantly intensified the transformation, and substantial amounts of intermediary minerals, including jarosite , ferrihydrite , lepidocrocite and fougerite, formed during the initial reaction stage, especially at pH 5.6. X-ray diffraction (XRD) analyses confirmed that goethite and hematite were the primary final-stage transformation products of Sb(V)-bearing nmSIM, regardless of Fe(II) exposure. Throughout the Sb(V)-bearing nmSIM transformation at pH 3.8, Sb release was inversely related to the Fe(II) concentration in the initial stage, and after maximum release was achieved, Sb was gradually repartitioned onto the nmSIM. No Sb repartitioning occurred in the absence of Fe(II) at pH 5.6, but the introduction of Fe(II) suppressed Sb release and improved Sb repartitioning on nmSIM. This transformation was conducive to Sb reimmobilization on Sb(V)-bearing nmSIM due to the structural incorporation of Sb into the highly crystalline goethite and hematite generated by the Sb(V)-bearing nmSIM transformation, and no reduction of Sb(V) occurred. These results imply that Fe(II) can trigger mineralogical changes in Sb(V)-bearing nmSIM and have important impacts on Sb partitioning under acidic conditions. These new insights are essential for assessing the mobility and availability of Sb in acid mine drainage areas.
研究领域:
环境科学
·
矿物学
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PubMed
高影响因子
危险品化学品经营许可证（带存储）