ChemistrySelect
·
2025
·Vol. 10
·期 8
·e202406007
·
IF 2
Chenxi Li,Kang Li,Shina Li,Ruixin Ma
Graphical In this study, copper hexacyanoferrate (CsRb–CuHCF) was used as a precipitant. Results demonstrated that CsRb–CuHCF can efficiently separate Rb + and Cs + from the high-salty solutions. The enrichment factor was up to 384 before and after precipitation. The precipitant reacts first with Cs + and then gradually with Rb + and can be used for the separation of Cs + and Rb + from each other. Cesium (Cs) and rubidium (Rb) are important rare alkali metal elements that are scarce and dispersed in nature. They often coexist with high amounts of Na + and K + . In this study, copper hexacyanoferrate (CuHCF) was used as a co-precipitant to enrich Cs + and Rb + in a high-salt solution. The effect of parameters, such as type and dose of divalent metal ions, solution pH, material dropping speed, reaction time, and temperature, was investigated for the recovery rate of Cs + and Rb + . Results showed that the recovery rates of Cs + and Rb + were 99.78% and 88.84% at the optimal Cu 2+ /(Cs + +Rb + ) molar ratio of 0.5, respectively. The reaction could be completed within 10 min in pH 3–8. The detailed characterization of the Cs + and Rb + containing co-precipitants, CsRb–CuHCF, confirm a general formula of Cs 1.09 Rb 0.81 K 0.16 Cu 0.97 Fe(CN) 6 . The (Cs + +Rb + )/(Na + +K + ) increased significantly from 0.074 to 28.47 before and after precipitation, which realized the effective enrichment of Cs + and Rb + . Studies of the precipitation reaction mechanism showed that the precipitant reacted first with Cs + and then with Rb + . This process offers a promising avenue for the enrichment and separation of Cs + and Rb + from high-salty solutions.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Changhong Zhou,Rui Ling,Menglei Wang,Chao Yang,Wentao Qi
Syngas , a mixture of H 2 and CO with adjustable compositional ratios, can be directly produced via H 2 O/CO 2 co-electrolysis in solid oxide electrolysis cells (SOECs). In this study, We have developed a strategy to enhance the catalytic activity of titanate perovskite cathodes by constructing active metal-oxide interfaces through the in-situ growth of Ni x Cu 1-x alloy nanocatalysts (x = 0, 0.25, 0.5, 0.75 and 1) on LST matrix. The evenly distribution of Ni x Cu 1-x alloy nanoparticles (∼30 nm) on the LST substrate has been confirmed through a serious of characterization techniques, including XRD , XPS, SEM and TEM. Specifically, the LSTNi 0.75 Cu 0.25 cathode demonstrated an optimal synergistic effect , achieving high efficiency in the co-electrolysis of H 2 O/CO 2 to syngas. Under an applied voltage of 1.6 V at 800 °C, the syngas production rate reaches 5.43H 2 and 3.48 CO ml min −1 cm −2 with ∼96 % Faradaic efficiency. Furthermore, the composition of the produced syngas can be finely tuned in a broad range from 0.8 to 3.5 b y simply adjusting the inlet gas composition (H 2 O/CO 2 ratio) and the operating temperature. The LSTNi 0.75 Cu 0.25 cathode, when subjected to continuous H 2 O/CO 2 co-electrolysis for 100 h, exhibited remarkable stability, attributing to the robust and active nature of the metal-oxide interfaces.
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BIOMASS & BIOENERGY
·
2025
·
IF 5.8
Wenhao Zhang,Fei Wang,Junfeng Feng,Hui Pan
Hydrodeoxygenation is currently an effective strategy for upgrading bio-oils. In this study, Al 2 O 3 –TiO x composite metal oxide was synthesized using the sol–gel method and then impregnated with Ni–Co bimetals for the selective hydrodeoxygenation conversion of lignin-derived phenolic compounds into cyclohexanol. The impact of different carriers and Ni Co metal content was investigated in detail, with the optimal 10Ni–5Co/Al 2 O 3 –TiO x achieving 93.7 % cyclohexanol yield by completely converting guaiacol within 2 h under mild reaction conditions of 200 °C and 1 MPa H 2 with isopropanol as the solvent. XRD and HRTEM analyses confirmed the presence of Ni and Co in an alloy form. XPS results indicated that the Ti synthesized by the sol–gel method primarily existed in the form of Ti 3+ , with suitable oxygen vacancies that could enhance substrate adsorption and conversion. The reaction pathway for the selective conversion of guaiacol to cyclohexanol was inferred based on the results of GC-MS analysis of byproducts.
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ChemCatChem
·
2024
·
IF 3.8
Yuxin Sun,Yunshuo Wu,Zhuoyi Zhang,Xuanhao Wu,Haiqiang Wang,Zhongbiao Wu
Graphical Ce-Pr co-doped Co 3 O 4 achieved 100% N 2 O conversion at 400 °C over Pr 0.02 Ce 0.2 Co 1 . The introduction of Ce facilitated the formation of oxygen vacancies, which were essential for N 2 O activation. But these Ce species strictly inhibited Co 3 O 4 crystallization and surface exposure, which were unfavorable to N 2 O decomposition. By the codoping of Pr, these negative effects were eliminated, leading to remarkable catalytic performance. Nitrous oxide (N 2 O) has gained increasing attention as a non-carbon dioxide greenhouse gas, and catalytic decomposition is an effective method for mitigating its emissions. In this study, Ce-Pr Co-doped Co 3 O 4 was synthesized via a coprecipitation method and used for the catalytic decomposition of N 2 O. The experimental results revealed that the N 2 O decomposition achieved 100% conversion at 400 °C on the catalyst with a Pr/Ce/Co molar ratio of 0.02:0.2:1, exhibiting an 80 °C decrease of T 100 compared with that of Co 3 O 4 . The introduction of Ce reduced the size and crystallization of Co 3 O 4 particles, increased the activity of the lattice oxygen of Co 3 O 4 , and facilitated the formation of oxygen vacancies, thereby enhancing the activation of N 2 O. However, the introduction of Ce inhibited the crystallization of Co 3 O 4 and the surface coverage of CeO 2 decreased the exposure degree of N 2 O molecules to the Co 3 O 4 surface. Co-doping strategy of Ce-Pr was performed to alleviate the negative effects of ceria. Consequently, the incorporation of Ce and Pr species enhanced the redox properties of Co 3 O 4 , leading to remarkable catalytic performance of N 2 O decomposition. This study elucidated the interaction between Ce and Pr dopants and Co 3 O 4 , and encouraged more attention on designing novel catalysts for N 2 O mitigation.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jin Wang,Bing Li,Tiantian Tang,Caiyun Li,Hongrui Yang,Hanwen He,Xinshuang Lin,Yang Song,Sen Zhang,Chao Deng
The design of highly efficient catalysts to enhance the kinetics of oxygen reduction (OER) and oxygen evolution (ORR) reactions is the key issue for the development of high-performance Zn-air battery. In this work, we report the design of Co-CoTe heterostructured fibers as the bifunctional oxygen catalyst for Zn-air battery. Firstly, the theoretical analysis was carried out on Co-CoTe heterostructure. The large work function difference is favorable to construct strong interfacial built-in electric field (BIEF), and the low energy barrier endows high catalytic activities. Moreover, the in-situ grown carbon shell was designed to build “core–shell” Co-CoTe/C unit to realize its high performance. They assemble the Co-CoTe@HFS fiber with good self-supporting and flexible features. Taken the advantages of the strong BIEF, the “core–shell” basic unit, and the freestanding substrate, the Co-CoTe@HFS fiber achieves the good electrocatalytic properties and high reliability. The full Zn-air battery (ZAB) with the Co/CoTe@HFS air cathode achieves the high peak power density and cycling stability over long-term cycling. Therefore, this work provides a clue to design bifunctional oxygen catalysts for high-performance ZABs.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Xuanhao Liang,Guangyuan Chen,Hao Zhang,Ling Zhang,Tao Duan,Lin Zhu
Ti-based MOFs exhibit ultra-high stability in radioactive waste gases containing nitrogen oxides (NO X ) and are effective in capturing radioactive iodine. In this study, NH 2 -MIL-125 was synthesized via a one-pot solvothermal method and its adsorption performance for iodine was investigated using batch adsorption experiments, the stability of materials was tested by simulating post-processing conditions. The results indicated that NH 2 -MIL-125 had a maximum iodine adsorption capacity of 1.61 g/g at 75 ℃ and reached adsorption equilibrium within 60 min, and the adsorption capacity of methyl iodine reached 776.9 mg/g. The material also exhibited excellent stability and iodine adsorption performance in the presence of NO X . After soaking in NO 2 for 24 h, its structure remained stable and the adsorption capacity for iodine remained at 231.5 mg/g. The excellent co-adsorption performance of NH 2 -MIL-125 on iodine and NO X was attributed to the synergistic effects of Ti-OH groups and amino functional groups. These findings provide a reference for the capture of radioactive iodine and also demonstrate the potential of NH 2 -MIL-125 for iodine capture during spent fuel reprocessing .
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Hanchen Wang,Lijia Jia,Biao Huang,Qi-Lin Lu
The construction of N, P co-doped hierarchically porous carbons (NPHPC) by a facile and green approach is crucial for high-performance energy storage but still an enormous challenge. Herein, an environment-friendly “ in-situ co-doping, self-regulation-activation” strategy is presented to one-pot synthesize NPHPC using a phytic acid-induced polyethyleneimine/chitosan gel (PEI-PA-CS) as single precursor. NPHPC displayed a specific surface area of up to 1494 m 2 g −1 , high specific capacitance of 449 F g −1 at 1 A g −1 , outstanding rate capability and cycling durability in a wide temperature range (−20 to 60 °C). NPHPC and PEI-PA-CS electrolyte assembled symmetric quasi-solid-state flexible supercapacitor presents superb energy outputs of 27.06 Wh kg −1 at power density of 225 W kg −1 . For capacitive deionization (CDI), NPHPC also exhibit an excellent salt adsorption capacity of 16.54 mg g −1 in 500 mg L −1 NaCl solution at a voltage of 1.4 V, and regeneration performance. This study provides a valuable reference for the rational design and synthesis of novel biomass-derived energy-storage materials by integrating phytic acid induced heteroatom doping and pore engineering.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Wenhui Cao,Mengyu Liu,Kai Zhang,Shenghao Zhang,Caixia Li,Yonghong Wen,Qingliang Lv,Qin Wen,Lei Wang
Lithium-sulfur (Li-S) batteries have attracted significant attention due to their high theoretical energy density, low cost and environmental friendliness, which are considered one of the most promising candidates for next-generation energy storage devices. However, the sluggish kinetics associated with sulfur oxidation–reduction reactions and the detrimental shuttle effect caused by lithium polysulfides (LiPSs) significantly impacts the electrochemical performance of Li-S batteries. In this work, Co single-atom catalyst (Co SAC -NC) on an ordered macro-microporous structure are designed, and the catalyst are coated onto 2325 separator. The ordered micro-microporous structure of Co SAC -NC enhances the interaction with LiPSs and provide reservoir for LiPSs. Secondly, the highly exposed Co-N x configuration active sites can effectively anchor LiPSs and promotes their rapid conversion. This work significantly improves the utilization efficiency of the cathode, resulting in an exceptionally low-capacity decay rate of just 0.043 % per cycle over 1000 cycles at 1 C.
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Molecular Catalysis
·
2024
·
IF 3.9
Xingling Zhao,Xue Zhou,Wanyan Xing,Zhimin Yuan,Kaili Wang,Qihang Zhang,Yulong Shan,Jiani Liu,Lin Ju,Zaiyong Jiang,Hong He
CO is a ubiquitous air pollutant, frequently encountered in the fields of automotive exhaust purification, especial in the cold-start-emission stage. Pt based catalysts are widely used to purify CO into CO 2 owing to their exceptional performance. But they can be few excited to exhibit reasonable catalytic activity due to the low temperature at the cold-start-emission stage. In exhaust gas purification catalysts used by fossil fuel-based vehicles, Al 2 O 3 is used frequently. But there are rarely reports of Pt loaded Al 2 O 3 catalysts achieving feasible activity of CO oxidation at room temperature. Herein, we prepared Cu x Pt y alloy/Al 2 O 3 catalysts (with high penta-coordinated Al 3+ (Al V )), Al V centers as binding sites for Cu 3 Pt 1 alloys on Al 2 O 3 enable the high dispersion and stability of Cu 3 Pt 1 alloy. The adsorption capacity of O 2 and CO molecules on Cu 3 Pt 1 surface are stronger than the case on Pt surface, which may make O 2 and CO molecules more easily activated, making the CO oxidation reaction easier. In addition, the desorption of CO 2 from Cu x Pt y surface is easier compared to that on Pt surface, increasing the frequency of use of active sites there. Therefore, this Cu 3 Pt 1 /Al 2 O 3 catalyst exhibits 100 % conversion of CO with a GHSV of 6×10 3 mL·g −1 cat ·h −1 at room temperature. This work provides a feasible guideline for the design and synthesis of Pt loaded Al 2 O 3 catalysts toward room temperature CO oxidation.
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CHINESE JOURNAL OF PHYSICS
·
2024
·
IF 4.6
Zhuojia Xie,Zhengguang Zou,Changji Xu,Shenglin Zhong,Min Feng,Xinyu Jiang,Weijian Zhang,Xiuxin Zheng,Wenbin He
We prepared La 0.8- x K x Sr 0.2 Mn 0.95 Co 0.05 O 3 (0 ⩽ x ⩽ 0.1) (LKSMCO) through the modified sol-gel method (S-G) and its structure. Then, the magnetic, magnetocaloric, and critical behavior were analyzed. LKSMCO was confirmed to be the rhombohedral structure within the R-3c space group (No.167) using transmission electron microscopy and X-ray diffraction. For validating the chemical composition of LKSMCO, X-ray photoelectron spectroscopy and EDS were applied, showing that K + was successfully doped. Phase transition of LKSMCO from paramagnetic to ferromagnetic phase near Curie temperature (Tc) was confirmed with a Magnetic Property Measurement System (MPMS). Using normalization and Banerjee's criterion, LKSMCO was demonstrated to be the second-order magnetic phase transition (SOMPT). As shown from the applied magnetic field, the maximal magnetic entropy ( − Δ S M m a x ) of LKSMCO near Tc was 3.87 J/(kg K) ( x = 0.00), 4.28 J/(kg K) ( x = 0.05) and 4.44 J/(kg K) ( x = 0.10). We employed the Kouvel-Fisher approach (KF) and modified Arrott plots to confirm the values of γ, δ , and β . This indicates that critical exponents of LKSMCO were consistent with the Mean-filed model.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Changming Zhang,Zhihao Liu,Yongjin Zou,Fen Xu,Lixian Sun,Zhicong Hu,Sensen Yu,Cuili Xiang
Spinel-type materials are attracting great attention as potential electrocatalysts for the hydrogen- and oxygen-evolution reactions. However, their inherent catalytic activities are not on par with those of precious-metal catalysts, and their poor stabilities continue to constrain their rapid development. In this study, we fabricated Zr-CuCo 2 S 4 nanowires and Co(OH) 2 nanosheet–nanowires using electrochemical methods, resulting in lattice defects, sulfur vacancies, and more exposed active sites that catalyze the hydrogen- and oxygen-evolution reactions. DFT calculations revealed that sulfur vacancies enhance intrinsic activity, while Zr doping reduces the energy barrier for H*–OH* adsorption, promotes the formation of additional sulfur vacancies, and modulates active-site Cu/Co valence states, which greatly enhances water-dissociation and H*-adsorption kinetics. Consequently, Zr-CuCo 2 S 4 /Co(OH) 2 requires low overpotentials of 88 and 208 mV, respectively, to support highly stable alkaline hydrogen- and oxygen-evolution reactions at 10 mA cm −2 . This study provides a rational strategy for designing low-cost spinels for green and clean energy.
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INTERNATIONAL JOURNAL OF PHARMACEUTICS
·
2024
·
IF 5.3
Liqiao Zhang,Xinyu Cao,Jiayi Chen,Yanyan Dong,Wenwen Chen,Yu Gao,Jingjing Guo,Haiqin Huang
Multidrug resistance (MDR) poses a significant impediment to the efficacy of chemotherapy in clinical settings. Despite Paclitaxel (PTX) being designated as the primary pharmaceutical agent for treating recurrent and metastatic breast cancer, the emergence of PTX resistance frequently results in therapeutic shortcomings, representing a substantial obstacle in clinical breast cancer management. In response, we developed a delivery system exhibiting dual specificity for both tumors and mitochondria. This system facilitated the sequential administration of small interfering B-cell lymphoma-2 (siBcl-2) and PTX to the tumor cytoplasm and mitochondria, respectively, with the aim of surmounting PTX resistance in tumor cells through the activation of the mitochondrial apoptosis pathway. Notably, we employed genetic engineering techniques to fabricate a recombinant ferritin containing the H-subunit (HFn), known for its tumor-targeting capabilities, for loading siBcl-2. This HFn-siBcl-2 complex was then combined with positively charged Triphenylphosphine-Liposome@PTX (TL@PTX) nanoparticles (NPs) to formulate HFn/siBcl-2@TL/PTX. Guided by HFn, these nanoparticles efficiently entered cells and released siBcl-2 through the action of triphenylphosphine (TPP)-mediated “proton sponge,” thereby precisely modulating the expression of Bcl-2 protein. Simultaneously, PTX was directed to the mitochondria through the accurate targeting of TL@PTX, synergistically initiating the mitochondrial apoptosis pathway and effectively suppressing PTX resistance both in vitro and in vivo . In conclusion, the development of this dual-targeting delivery system presents a promising therapeutic strategy for overcoming PTX resistance in the clinical treatment of breast cancer.
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