MOLECULES
·
2024
·Vol. 29
·期 16
·3843
·
IF 4.2
Xinbao Li,Kai Sun,Ying Chen,Ye Yuan
As a widely used support, TiO2has often been combined with Pd to form highly sensitive gas-chromic materials. Herein, we prepared a series of Pd/TiO2catalysts with different Pd content (from 0.1 to 5 wt.%) by the impregnation method for their utilization in fast room-temperature CO detection. The detection was simply based on visible color change when the Pd/TiO2was exposed to CO. The sample with 1 wt.% Pd/TiO2presented an excellent CO gasochromic character, associated with a maximum chromatic aberration value of 90 before and after CO exposure. Systematic catalyst characterizations of XPS, FT-IR, CO-TPD, and N2adsorption–desorption and density functional theory calculations for the CO adsorption and charge transfer over the Pd and PdO surfaces were further carried out. It was found that the interaction between CO and the Pd surface was strong, associated with a large adsorption energy of −1.99 eV and charge transfer of 0.196e. The color change was caused by a reduction in Pd2+to metallic Pd0over the Pd/TiO2surface after CO exposure.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Peng Zhao,Jingwei Liu,Wei Zhu,Jie Meng,Zhuang Li,Jinwei Qin,Xiaohui Wang,Haiqin Wan,Chao Yao,Lin Dong
Catalytic combustion is one of effective ways to remove short-chain alkanes. In this study, we elaborately designed a novel catalyst of in situ Co-Mn decorated LaMnO 3 perovskite for ethane catalytic combustion, in which extra Mn and Co species were introduced via acidic KMnO 4 and Co(NO 3 ) 2 solution precipitation method. The addition of Mn and Co could not only slightly etch LaMnO 3 , thereby increasing specific surface area and redox property, but also generate new active phase CoMn 2 O 4 , thus accelerating reaction. Among all the as-prepared catalysts, CMO/LMO-0.5 exhibited admirable ethane removal efficiency with a T 90 of 365 °C, a reaction rate of 0.46 mmol·g −1 ·h −1 , a TOF value of 0.64 mmol·g −1 ·h −1 , and excellent hydrothermal stability and reusability. Moreover, according to in situ DRIFTS, a possible pathway was proposed. This work can rationalize an alternative approach to develop an active catalyst for short-chain alkanes catalytic combustion or other catalytic systems.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Xining Guo,Huiying Li,Leshi Zhang,Rui Hao,Fei Ye,Jianmin Gu,Kaihang Sun,Guozhu Li,Ji−Jun Zou,Zhourong Xiao,Desong Wang
The photothermal catalytic conversion of CO2 into value-added chemicals is of great significance for realizing the goal of carbon neutralization. However, these catalysts have problems such as an insignificant photothermal effect and high recombination of photogenerated carriers. Here, porous TiO2 was prepared by hydrothermal crystallization and topological conversion of metal–organic frameworks (MOFs), and loaded with highly dispersed Pt catalysts to realize an efficient photothermal catalytic reverse water-gas shift (RWGS) reaction. N2-adsorption results showed that the as-prepared Pt/TiO2 catalysts had an abundant mesoporous structure, thus contributing to the rapid diffusion of reactants and light transport. X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) results showed that Pt was uniformly dispersed on the catalyst surface with an average particle size of 2.06 nm. H2-TPR profiles showed that the Pt/TiO2 catalyst had strong metal–support interactions, CO2-TPD showed its strong CO2 adsorption capacity, and CO-TPD showed its weak CO adsorption strength. In situ X-ray photoelectron spectroscopy (XPS) showed that the electron cloud density on the Pt surface further increased under light illumination, which contributed to the activation and dissociation of H2. In addition, the Pt/TiO2 catalyst had a narrow band gap width and sufficiently low reduction potential, and its excellent photothermal and photovoltaic properties ensured efficient performance in the photothermal RWGS reaction. The Pt/TiO2 catalysts showed a high CO2 conversion of 29.8%, a product CO selectivity higher than 99.6%, and a stability of more than 3000 min at 350 °C, with a light intensity of 1.2 W cm–2 and a GHSV of 36,000 mL gcat–1 h–1.
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Materials
·
2025
·Vol. 18
·期 15
·3633
·
IF 3.2
Hengfen Shen,Hao Du,Peng Li,Mei Wang
As an efficient clean energy technology, water electrolysis for hydrogen production has its efficiency limited by the sluggish oxygen evolution reaction (OER) kinetics, which drives the demand for the development of high-performance anode OER catalysts. This work constructs bimetallic (Al, Mn) co-doped nanoporous spinel CoFe 2 O 4 (np-CFO) with a tunable structure and composition as an OER catalyst through a simple two-step dealloying strategy. The as-formed np-CFO (Al and Mn) features a hierarchical flaky configuration; that is, there are a large number of fine nanosheets attached to the surface of a regular micron-sized flake, which not only increases the number of active sites but also enhances mass transport efficiency. Consequently, the optimized catalyst exhibits a low OER overpotential of only 320 mV at a current density of 10 mA cm −2 , a minimal Tafel slope of 45.09 mV dec −1 , and exceptional durability. Even under industrial conditions (6 M KOH, 60 °C), it only needs 1.83 V to achieve a current density of 500 mA cm −2 and can maintain good stability for approximately 100 h at this high current density. Theoretical simulations indicate that Al and Mn co-doping could indeed optimize the electronic structure of CFO and thus decrease the energy barrier of OER to 1.35 eV. This work offers a practical approach towards synthesizing efficient and stable OER catalysts.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 22
·1-13
·
IF 2.8
Ma Kangrui,Wu Jiawen,Wei Derong,Chen Jin,Rong Xuanting,Ding Ruyun,Gu Jia,Ma Xuetiao,Zheng Hui
With the development and use of the electronic and electrical equipment, solving electromagnetic pollution has become a top priority for human health. In this work, ternary co-doped (Ca 2 ⁺, Cu 2 ⁺, Sn 4 ⁺) ions were incorporated into M-type hexagonal barium ferrite (Ba 1-x Ca x Fe 11.6 Cu 0.2 Sn 0.2 O 27 ), and the effects of varying Ca 2 ⁺ doping levels on the crystal structure, surface morphology, and electromagnetic characteristics were thoroughly investigated. Structural characterizations confirms that Ca 2+ substitutes Ba 2+ sites, decreasing the grain size and lattice values while increasing the lattice strain. At x = 0.15, the Ba 1-x Ca x Fe 11.6 Cu 0.2 Sn 0.2 O 27 ferrite achieves the maximum value of saturation magnetization of 67.7 emu/g, the highest RL min value of -44.2 dB@14.3 GHz and effective absorption bandwidth of 3.04 GHz, showing potential as an effective material for absorption applications.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Zhaoqian Zhang,Shaopeng Xin,Qiaoxia Hu,Yunxia Hu
Proteins have emerged as promising materials to fabricate advanced separation membranes due to natural abundance, high biocompatibility, and precisely defined molecular structures. However, existing studies have primarily focused on enhancing membrane performance using proteins, with limited investigation into the mechanism of membrane-formation and structure-performance relationship of protein-based membranes. In this study, lysozyme (Lyz) and hemoglobin (BHb) were co-assembled to construct defect-free, tunable nanofiltration membranes with sub-10 nm pore sizes. The assembly behaviors in solutions, on solid substrates and on porous substrates were investigated. It is demonstrated that the membrane formation is predominantly governed by interface-induced planar growth of protein assembled nanofilms. The BHb electrostatically interacts with Lyz to tailor the pore structure of the protein assembled nanofilm, ultimately leading to the formation of programmable Lyz/BHb membranes. Furthermore, systematic optimization of key parameters including protein concentration and pH enables precise control over structure and performance of membranes. The protein membrane without defects and nanoparticles could be created by protein co-assembly with short time and multi-layer growth. The resulting Lyz/BHb membranes exhibit exceptional tunability in nanometer, with pore sizes at 1.4–6.0 nm and water permeance varying from 39 to 310 L⸱m −2 ⸱h −1 ⸱bar −1 . These protein-based membranes demonstrate high efficiency in diverse separation tasks, including protein retention, dye recovery, and antibiotic removal. This work provides a versatile and simple method for tailoring properties of protein-based membranes, offering promising opportunities for the development of customized separation membranes for various industrial and environmental applications.
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Nanoscale
·
2025
·
IF 5.1
Xinke Yu,Sili Liu,Zhili Wan,Xiaoquan Yang
Supramolecular hydrogels assembled from natural herbal small molecules represent a promising platform for the development of biocompatible and multifunctional soft biomaterials. In this study, we report a novel multicomponent supramolecular hydrogel system constructed from the co-assembly of glycyrrhizic acid (GA) and rhein (Rh) via Zn2+ modulation. The introduction of Zn2+ not only reinforces the mechanical stiffness and toughness of the GA-Rh hydrogel network through complexation but also improves its antibacterial efficacy and anti-inflammatory capacity. Notably, a hierarchical nanofibrillar gel network with an internal multiscale structure is formed, in which a micron-scale pore network formed by the GA nanofibrils and a submicron-scale pore network formed by the GA-Rh co-assembled nanofibrils synergistically contributed to the overall structural integrity and biological performance. In vitro assays demonstrate that the GA-Zn-Rh hydrogels exhibit potent antibacterial activity against Staphylococcus aureus and Escherichia coli, excellent biocompatibility, and pronounced anti-inflammatory effects. This work provides valuable insights into the relationships between nanostructure and functionality in multicomponent bioactive herbal hydrogels, offering a supramolecular strategy to mimic the synergistic therapeutic principles of traditional Chinese medicine. These findings pave the way for the development of nature-inspired bioactive hydrogels for wound healing and broader biomedical applications.
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Catalysis Science & Technology
·
2025
·
IF 4.2
Congyu Qin,Shuchen Xing,Guiming Ba,Huilin Hu,Jinhua Ye,Defa Wang
Photothermocatalytic carbon dioxide (CO2) reduction into value-added chemicals is one of the promising methods for solar-to-chemical energy conversion. However, it remains a challenge in the improvement of catalytic activity and product selectivity in view of practical applications. Herein, we report a facile “two-step” approach – nitrogen treatment of Ti3C2 MXene (TC) and loading of Co nanoparticles – to synthesize a Co-nanoparticle/layered TiO2-TiN (Co/TiO2-TiN) composite as an efficient photothermocatalyst for selective reduction of CO2 to methane (CH4). In contrast to the Co/Ti3C2 catalyst that shows a high CO selectivity, the optimal 35Co/TiO2-TiN catalyst exhibits a CH4 evolution rate of 45.5 mmol gcat−1 h−1 with 99.3 % selectivity under a 300 W Xe lamp irradiation. The synergistic effect of increased light absorption capacity, reactive sites, CO2 adsorption/activation ability, and desorption energy barrier of CO* intermediate by the loaded Co nanoparticles and the formation of Ti−N−O bonds accounts for the significantly enhanced photothermocatalytic performance of 35Co/TiO2-TiN for selective CO2 reduction into CH4. Our work demonstrates that metal nanoparticle loading and formation of Ti−N−O bonds can be integrated into the strategy in developing a photothermocatalyst for efficient CO2 reduction with controlled product selectivity.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Yan Liu,Xingnian Duan,Xiaoyu Qiu,Chengjia Luo,Xixiang Liu,Jianmei Cen
Developing efficient electrocatalysts is very important for hydrogen production. These catalysts help speed up the oxygen evolution reaction (OER). This is crucial for solving energy shortages and reducing pollution. Herein, Co-doped NiMoO 4 (Co-NiMoO 4 /NF) was successfully prepared by pyrolysis of ZIF-67 via an impregnation-hydrothermal strategy and as a catalyst for oxygen evolution reaction in alkaline solutions. The nanorod-nanosheet structure of Co-NiMoO 4 /NF provides large surface area and abundant active sites, while cobalt doping modulates the electronic structure of NiMoO 4 , which is conducive to the enhancement of the electrochemical activity of catalysts. Density-functional theory calculations further demonstrated that Co-doped Co-NiMoO 4 /NF was more favorable to the adsorption and stabilization of *OOH intermediates than NiMoO 4 /NF. As a result, Co-NiMoO 4 /NF exhibits excellent OER performance with an overpotential of 199 mV at 10 mA cm −2 and remains stable after 200 h of continuous testing under current density conditions of 10 and 500 mA cm −2 . The remarkable electrocatalytic performance of Co-NiMoO 4 /NF highlights its strong potential as an efficient catalyst for sustainable energy conversion systems.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wensheng Wei,Yuxin Wang,Guangwen Xu,Jinggang Zhao,Lei Shi
In this work, a series of multifunctional integrated heterogeneous catalysts (PS-[EIMBr-COO] 2 M, M = Fe 2+ , Co 2+ , Ni 2+ and Zn 2+ ) with abundant active sites and a dynamic swing-active architecture were successfully constructed, which were applied in catalytic cycloaddition of CO 2 and propylene oxide (PO) for efficient propylene carbonate (PC) preparation. The PS-[EIMBr-COO] 2 Co catalyst demonstrated the best catalytic activity with a 98.92 % conversion of PO, a 99.00 % selectivity towards PC, and a TOF value of 120.75 h −1 at 110 °C. The characterization techniques and theoretical simulation revealed that the excellent catalytic performance of the PS-[EIMBr-COO] 2 Co catalyst was attributed to the synergistic effect of the Lewis acid center, imidazolinium groups (Lewis base), Br − ions (nucleophilic site), and swing-active structure. The synergistic effect between active sites reduced the reaction energy barrier of the rate-determining step, and the swing-active structure in catalyst was believed to improve the contact efficiency between the active site and the reaction substrate. The synthesized PS-[EIMBr-COO] 2 Co catalyst was structurally stable and maintained its initial catalytic ability after seven cycles. Moreover, the PS-[EIMBr-COO] 2 Co catalyst shows good substrate universality for the cycloaddition reactions of epoxides. The catalyst construction strategy of functional integration and flexible active structure has high universality for cycloaddition catalyst design, and has important guiding significance for rational design of efficient heterogeneous catalysts.
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RSC Advances
·
2025
·Vol. 15
·期 34
·28298-28312
·
IF 4.6
Fan Yang,Hongchi Liu,Qian Luo,Hao Deng,Rongrong Zhang,Yi Yang,Hong Yang,Huaying Wu,Xiaojun Tao
In this study, the amphiphilic polymer HA–ANI, formed by grafting hyaluronic acid (HA) and 6-(2-nitroimidazolyl)hexylamine (ANI), was self-assembled in water to form nanoparticles (NPs), which were modified to obtain dual drug-loaded nanoparticles (P/I NPs) by dialysis loading of paclitaxel (PTX) and IR780. Electron microscopy and dynamic light scattering (DLS) results showed that the P/I NPs presented a near-spherical shape with a size of 221.10 ± 2.31 nm. The drug loading and encapsulation rates of PTX in P/I NPs were 22.73% and 89.23%, respectively, and those of IR780 were 1.11% and 42.44%, respectively. In vitro release experiments demonstrated that NADPH could accelerate the drug release from the NPs. Under the irradiation of an NIR laser, the temperature of the P/I NPs increased significantly. In an in vitro cellular assay treating 4T1 cells for 24 h, the cellular uptake rate of NPs could reach 91.50 ± 3.51%, the 4T1 cell migration rate was 2.68 ± 0.34%, the cell viability was 39.96 ± 0.55%, and the apoptotic cell death rate was 13.93 ± 0.42%. In an in vivo anti-tumor experiment, the inhibition rate of the P/I NPs towards tumors was up to 35.44%; the fluorescence intensity at the tumor site gradually increased with time, and the maximum value appeared within 24 h, indicating that the P/I NPs had a targeting function. The results of H&E staining showed that there was no obvious pathological damage to the main organs of the mice in each group, that means there were no obvious side effects.
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Materials Today Communications
·
2025
·
IF 4.5
Siwen Pi,Jie Li,Yingde Zhang,Weina Zhou,Hui Liu,Qing Wang
M-type strontium ferrite Sr 0.98 Ce 0.02 Dy x Fe 12- x O 19 ( x =0.00-0.20) doped with Ce-Dy elements was prepared by solid-phase sintering. The X-ray diffraction (XRD) results revealed the formation of the M-type hexaferrite having P6 3 /mmc as a space group along with the co-existence of a secondary DyFeO 3 phase; The field emission scanning electron microscopy (FESEM) results show that the grain boundaries of the samples are clear, the crystallinity is good and the grains have been refined; The purity of the sample can be proved by energy dispersive spectrometer (EDS), and no other elements were found except for doped elements; It is clear that the experimental weight percentages of each element are quite close to the theoretical from the reactants used to synthesize each sample. Meanwhile, the FTIR results show tetrahedral and octahedral tensile vibration peaks induced by Fe–O bonds of M-type strontium ferrite; Through the analysis of the vibrating sample magnetometer (VSM), when the doping amount of Dy element is x =0.08, the coercive force of strontium ferrite is increased. At this time, hard ferrite with high coercive force and high saturation magnetization intensity is prepared. Demonstrating the unlimited potential of M-type strontium ferrite in the fields of magnetic recording and storage devices.
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