JOURNAL OF LUMINESCENCE
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2024
·
IF 3.3
En-Ting Wang,Junhan Yang,Weiping Guo,Qingyi Liu,Qi Zhang,Wei Zhang,Xinhan Chen,Lizhen Zhang,XiaoDong Yi,Guoqiang Wang,Yan Yu,Lingyun Li
Oxychloride phosphors that contain active ions coordinated with both oxygen and chloride ions have garnered significant attention, but the application of oxychloride phosphors is yet limited because of their demanding synthesis condition of vacuum or reducing atmosphere. Herein, we synthesize a new serial oxychlorides of La 9 W 6 O 30 Cl (LWOC) and Er 3+ /Yb 3+ , Ho 3+ /Yb 3+ , Tm 3+ /Yb 3+ doped LWOC through molten salt shielding method (MSS) in air, which is more efficient compared to the traditional method in vacuum. The compound of LWOC crystallizes in the tetragonal system space group P 4 2 / nmc (No. 137) with cell parameters a = b = 10.0445(1) Å, c = 12.6826(4) Å, V = 1279.57(5) Å 3 and Z = 11. The asymmetric unit of LWOC includes three La atoms, one unique W atom, two disordered W atoms with occupancy factors of 0.16(5) and 0.84(5), respectively, one Cl atom and six O atoms. Under the excitation of 980 nm laser, all the Er 3+ /Yb 3+ , Ho 3+ /Yb 3+ and Tm 3+ /Yb 3+ co-doped LWOC phosphors have excellent upconversion (UC) luminescence with bright visible light emission. A fluorescence intensity ratio (FIR) type temperature sensor is developed by using LWOC: Er 3+ , Yb 3+ phosphor as sensing media, which has a maximum relative temperature sensitivity ( S r ) of 0.90 % K −1 at 300 K.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Qianqian Fu,Kunlun Nie,Min Wang,Xianguo Ma,Jianwei Ren,Mengqi Cui,Hui Wang
Efficient and cost-effective oxygen evolution reaction (OER) catalysts are crucial for advancing energy conversion and storage technologies such as water electrolysis and metal-air batteries. However, the performance assessment of catalysts has been complicated by the diversity of material microstructures and electrochemical testing variables. In this study, the solvothermal and chemical vapor deposition methods were employed to synthesize several NiCo-based compounds with similar microstructures but incorporating different non-metal atoms (O, P, S, and Se). By ensuring a comparable density of electrochemically active sites, the influence of non-metal atoms on the electronic structure and catalytic activity were investigated. Characterization and molecular orbital theory confirmed that electronic coupling enabled the redistribution of atomic charge transfer in the NiCo 2 S 4 (NCS) sample with bridging O 2- and S 2- . Electrochemical tests of the optimal catalyst in 1 M KOH demonstrated a lower Tafel slope (111 mV dec −1 ) and higher conductivity. The catalyst required only a 353 mV overpotential to achieve 100 mA cm −2 , and the subsequent chronoamperometry displayed a 98 % retention rate over 48 h. Such insights into the selection of non-metal atom provides a pathway for designing and preparing efficient catalysts.
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Small
·
2024
·Vol. 21
·期 1
·2407337
·
IF 13
Linlong Xing,Haoran Cheng,Yang Li,Qiang Chen,Chuntai Liu,Changyu Shen,Xianhu Liu
The design and development of high-quality electromagnetic waves (EMW) absorbing materials play a vital role in combating the escalating negative effects of microwave radiation and interference. Herein, MoS 2 @Co/NC@CF fibrous membranes are successfully fabricated by electrospinning technology and carbonization, and a molybdenum disulfide (MoS 2 ) layer is synthesized on the surface of these fibers via hydrothermal method. The seed-assisted growth method not only effectively avoids the accumulation and improves the loading of ZIF-67 particles, so as to ensure that the magnetic components in the fibers are evenly distributed in a wider range, rather than only intermittently present in some sites. Meanwhile, the introduction of semiconductor MoS 2 as the shell further optimizes the impedance matching and improves the EMW absorption performance of the carbon fibrous membranes: the minimum reflection loss (RL min ) is −67.56 dB, and the maximum effective absorption bandwidth (EAB max ) is further expanded to 6.56 GHz (2.1 mm, 11.44–18 GHz). This work provides a feasible method for developing high-efficient EMW-absorbing materials.
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ACS Catalysis
·
2024
·
IF 11.3
Xuan-Yi Zhu,Shui-Zhong Zhao,Xue-Feng Zhang,Xia Huang,Cheng-Juan Gao,Li-Hong Yu,Zi-Yi Du,Li-Ming Cao,Chun-Ting He
Transition metal phosphides (TMPs) are high-potential catalysts for hydrogen evolution reaction (HER) yet struggle with the long-term maintenance of high activity at ampere-level current densities. Size cutting and heteroatom modification of TMPs are effective ways to improve their surface affinities and catalytic efficiencies, but the particle stabilities and synergistic regulation of band structures at different sites have become huge challenges. Herein, we have successfully synthesized cluster-level sulfur-doped iridium diphosphide (S-IrP2) through a molecular engineering strategy. It requires only low overpotentials of 133.6 ± 1.2 and 217.2 ± 2.6 mV to drive industrial current densities of 1.0 and 2.0 A·cm–2, respectively, being one of the best alkaline HER catalyst. Moreover, it showed almost no activity loss over 20,000 cycles and exhibited a remarkable charge transfer amount that exceeds those of reported TMPs. The electronic tailoring of IrP2 by sulfur atoms enables simultaneous shifting of the d-band and f-band centers of Ir and the p-band center of P, which co-optimizes the H and OH adsorption to lowering the H migration and H2 formation barriers. This work demonstrates that the molecular confinement synthesis holds tremendous prospects for architecting ultrafine metallic compounds with re-definable active surfaces.
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Polymers
·
2024
·Vol. 16
·期 3
·405
·
IF 4.7
Xiaoyan You,Hui Liu,Yue Chen,Guoping Zhao
Liposomes show promise for anti-cancer drug delivery and tumor-targeted therapy. However, complex tumor microenvironments and the performance limitations of traditional liposomes restrict clinical translation. Hyaluronic acid (HA)-modified nanoliposomes effectively target CD44-overexpressing tumor cells. Combination therapy enhances treatment efficacy and delays drug resistance. Here, we developed paclitaxel (PTX) liposomes co-modified with ginsenoside compound K (CK) and HA using film dispersion. Compared to cholesterol (Ch), CK substantially improved encapsulation efficiency and stability. In vitro release studies revealed pH-responsive behavior, with slower release at pH 7.4 versus faster release at pH 5. In vitro cytotoxicity assays demonstrated that replacing Ch with CK in modified liposomes considerably decreased HCT-116 cell viability. Furthermore, flow cytometry and fluorescence microscopy showed a higher cellular uptake of PTX-CK-Lip-HA in CD44-high cells, reflected in the lower half maximal inhibitory concentrations. Overall, CK/HA-modified liposomes represent an innovative, targeted delivery system for enhanced tumor therapy via pH-triggered drug release and CD44 binding.Keywords:liposomes;compound K;tumor-targeted therapy;PTX;hyaluronic acid
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Journal of Physical Chemistry C
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2024
·
IF 3.3
Wenhao Xu,Yujie Cao,Binhang Wang,Zitao Zhang,Xiang Li,Libo Sun,Guangnan Liu,Yun Tang
Metal–metal oxide nanostructures have drawn increasing research attention due to their unique properties enabled by strong interfacial interactions. However, the synthesis of metal–metal oxide nanocomposites with well-controlled architectures such as the core@shell structure remains challenging. Additionally, introducing plasmonic metal can endow the nanomaterials with photoresponsive functions, offering opportunities for optical modulation of catalytic properties. In this work, we designed and fabricated an over-reduced Au@CoOx-Co core–shell nanostructure using an improved seed growth process involving carbonyl precursors. The Au core serves as an in situ catalyst facilitating the over-reduced CoOx-Co shells, and the strong interfacial interaction introduces abundant oxygen vacancies (OVs) to provide reactive sites. Meanwhile, the Au core generates excitons under light irradiation, which can significantly enhance the activation of peroxymonosulfate (PMS) for degrading fluorine-containing pollutants. This design synergistically integrates structural design, photoelectronic regulation, and catalytic enhancement, demonstrating a promising application in the future.
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INTERNATIONAL JOURNAL OF PHARMACEUTICS
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2024
·
IF 5.3
Hao Cui,Yanchi Liu,Ying Yu,Dong Lv,Sha Ma,Mingju Gao,Ye Yang,Cheng Yuan,Yuan Liu,Chengxiao Wang
In this study, we aimed to develop brain-targeted co-delivery liposomes for the concurrent delivery of Panax notoginseng saponins (PNS) and acetylsalicylic acid (ASA) for the treatment of ischemic stroke. Within this system, PNS served as a cholesterol substitute, integrating into the phospholipid bilayer of the liposomes, while ASA was encapsulated internally. A poly-2-methacryloyloxyethyl phosphorylcholine (PMPC) polymer was synthesized and incorporated into the liposome surface. This formulation demonstrated an enhanced PNS-loading capacity and facilitated the synchronized delivery of key saponin components. Following PMPC modification, the liposomes exhibited prolonged circulation and improved transport across the blood–brain barrier (BBB) through acetylcholine receptor-mediated pathways. Furthermore, the co-delivery system exhibited enhanced therapeutic efficacy in a rat model of cerebral ischemia–reperfusion injury via the phosphoinositide 3-kinase/protein kinase C pathway. Additional analyses revealed significant effects on the metabolism of neurotransmitters, amino acids, folate, and various other pathways, indicating a multi-faceted therapeutic effect. Overall, this study presents an innovative research strategy for the comprehensive delivery of diverse components in traditional Chinese medicine formulations, highlighting the potential for synergistic treatments that combine traditional Chinese medicine with chemical agents.
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CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Linan Xu,Yifu Peng,Bin Zheng,Zhanqiang Fang
To address the issue of low activation efficiency of magnetic biochar (MBC), this research synthesized nitrogen-sulfur co-doped magnetic biochar (NSMBC) using sawdust as the primary material via impregnation pyrolysis method. NSMBC effectively activated hydrogen peroxide and exhibited significant oxidation and degradation capabilities towards sulfamethazine (SMT), a sulfonamide antibiotic. The results demonstrate that under optimal conditions, NSMBC achieves a removal rate of 99.7 % for SMT within 2 h, with a reaction rate constant 8.5 times higher than that of MBC/H 2 O 2 system. Mechanistic investigations unveiled that hydroxyl radicals (·OH) were the primary agents responsible for the degradation of sulfamethazine within the NSMBC/H 2 O 2 system, contributing to 83.26 % of the removal efficiency. Furthermore, the nitrogen-sulfur co-doping facilitates the increase in Fe(II) content, augmentes the defect density, and enriches the number of oxygen-containing functional groups, thereby enhancing the utilization efficiency of H 2 O 2 and consequently boosting the activation performance of magnetic biochar. Notably, the NSMBC/H 2 O 2 system demonstrated excellent degradation efficiency towards various antibiotics, exhibiting potent broad-spectrum activity. Minimal influence on the NSMBC/H 2 O 2 system was observed under conditions of coexisting natural organic matter and anions, rendering it suitable for practical application in the treatment of aquaculture wastewater and providing a novel technology for the application of magnetic biochar in actual water pollution control scenarios.
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POLYMER BULLETIN
·
2024
·
IF 3.1
Zhang Beibei,Zhang Lihua,Li Jin,Qiang Qi
Carbon emission reduction has been accepted as a common concern all over the world. Currently, CO 2 emission is mainly derived from the consumption of fossil fuels. To solve this issue, there is an urgent need to develop technologies for CO 2 capture. The utilization of membrane technology to remove CO 2 from a mixture gas attracts great interest. In the present work, poly(2-hydroxyethyl methacrylate- co -vinylamine) was synthesized by polymerization ( n -vinyl formamide and 2-hydroxyethyl methacrylate), hydrolysis, and ion exchange. The surface function of graphene oxide was carried out by aerobic self-polymerization of dopamine. The mixed matrix membranes were fabricated by adding the nanofiller (before and after modification) into the polymeric matrix. The membrane properties and its structure were characterized by FTIR, TGA, XRD, and SEM. The effect of nanofiller content and operation conditions on membrane performance was investigated. Results showed that the additions of nanofiller could decrease the crystallization of these membranes and effectively improve gas permeance. Remarkably, for the addition of 2.0 wt% dopamine-modified graphene oxide, the CO 2 permeance of the membrane was increased by 30.9% while achieving a CO 2 /N 2 selectivity of 83.5. The CO 2 permeation for CO 2 /CH 4 was also increased by 16.77%. These were surpassed over the 2008 Robeson’s upper bound. These resultant membranes demonstrated attractive potential for low-pressure post-combustion CO 2 capture. Besides, the stability of longtime tests on membranes was studied, and it was observed that membranes exhibited excellent stabilization with continuously operated for 220 h. The excellent properties of these membranes provide new opportunities for gas separation applications.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Shuangshuang Yang,Xingwei Wang,Chen Zhao,Chuanpeng Li,Qiangliang Yu,Bo Yu,Meirong Cai,Feng Zhou
Electromagnetic (EM) pollution frequently disrupts the regular operation of sophisticated electrical devices, necessitating the urgent development of lightweight EM wave absorbers that possess powerful absorption capability. Herein, we report a simple method for the preparation of Fe and heteroatom co-doped biochar composites (FeX-BC, where X = N, S) by directly carbonizing the precursors of anhydrous FeCl 3 , cherry kernel powder, and heteroatom dopants (melamine or Na 2 S 2 O 3 ·5H 2 O). By adding different amounts of dopants during the synthesis of the precursors, it is possible to adjust the heteroatom content of the FeX-BC samples with precision. It is worth mentioning that the FeN 0.1 -BC composite delivers the best EM wave absorption performance with an effective absorption bandwidth of 4.8 GHz and a minimal reflection loss of −63.2 dB. Furthermore, the significant attenuation of EM wave can be attributed to the synergistic interplay of magnetic loss, dielectric loss and the enhanced impedance matching. This study introduces a simple methodology for the fabrication of EM wave absorbers, a significant contribution to the synthesis, advancement, and functional applications of biomass-derived materials.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Longqian Wang,Yafei Zhao,Heqiu Chen,Yinze Yang,Dan Wang,Huishan Shang,Bing Zhang
The rational design of high-performance electrocatalysts is essential for promoting the industrialization of electrocatalytic water-splitting technology. Herein, phosphorus and sulfur co-doped nickel molybdate with rich-oxygen vacancies (P, S-NiMoO 4 ) was prepared as an efficient bifunctional self-supporting water-splitting catalyst from the perspective of enhancing the conductivity and optimizing the electronic configurations. The incorporation of P, S and oxygen vacancies greatly enhances the conductivity and charge-transfer efficiency of NiMoO 4 . Additionally, P and S can serve as proton carriers and electron acceptors to enhance the catalytic activity by accelerating proton activation and high-valent metal generation in the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). As expected, P, S-NiMoO 4 demonstrates efficient bifunctional catalytic activity with an overpotential of only 31/206 mV at 10 mA cm −2 for HER/OER in 1 M KOH. Meantime, the electrolyzer assembled with P, S-NiMoO 4 as electrodes requires a voltage of only 1.55 V to achieve a water-splitting current density of 50 mA cm −2 along with good stability over 110 h. This work puts forward a novel approach based on elemental doping and vacancy engineering for the design of effective and enduring catalysts for water splitting.
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JOURNAL OF ELECTRONIC MATERIALS
·
2024
·Vol. 54
·期 1
·634-646
·
IF 2.2
Liu Xinyu,Li Mingzhao,Shi Chonghua,Wang Jing,Yao Shaowei
Sodium-ion batteries are considered promising for large-scale energy storage due to their abundance. Therefore, it is crucial to develop stable anode materials with high specific capacity. SnO 2 was coated with Zn/Co-zeolitic imidazolate frameworks (ZIFs) by using the solvothermal method to obtain SnO 2 @Zn/Co-ZIFs. Then, Sn@Zn/Co-NPC (N-doped porous carbon) was obtained through heat treatment in an inert atmosphere. In this material, Sn provides a higher capacity, while Zn/Co-NPC not only can provide part of the capacity and increase the conductivity of the material, but also helps alleviate the volume expansion of Sn during the charge and discharge process. Therefore, the effect of the amount of Sn on the electrochemical properties of the materials was investigated by varying the addition of SnO 2 . The results show that the 50Sn@Zn/Co-NPC electrode material retains a discharge specific capacity of 334.90 mAh g −1 after 100 cycles at 100 mA g −1 current density. After 200 cycles at 500 mA g −1 current density, 50Sn@Zn/Co-NPC electrode material still has 275.80 mAh g −1 discharge specific capacity. The 50Sn@Zn/Co-NPC electrode material has excellent electrochemical properties. Therefore, this paper provides a reference for the design of stable, long-cycle, and low-cost anode materials for sodium-ion batteries.
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