IONICS
·
2023
·Vol. 29
·期 9
·3693-3701
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IF 2.8
Tang Xiao,Wang Zhenwei,Cai Dandan,Shao Qinsi,Qin Ziwei,Liu Yang,Li Wenxian,Li Ying,Zhang Jiujun
Design and synthesis of high-performance and low-cost electrocatalysts for methanol oxidation reaction (MOR) are of great significance in energy conversion applications. In this work, g-NiO/CuO composites with high catalytic performance for MOR are successfully synthesized by a template method using g-C 3 N 4 flakes as the sacrificial template. NiO nanoparticles are dispersed uniformly on the surface of the pine needle-liked CuO substrate, resulting in a synergistic effect which can enhance the electrocatalytic MOR activity and stability of g-NiO/CuO catalysts. The catalyst shows a maximum peak current density of 159 mA cm −2 and also long-term stability. The bimetal-oxide-synergistic strategy in this work highlights a promising way for the design of catalysts with high electrochemical performance for direct methanol fuel cells (DMFCs).
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 32
·78988-79000
·
IF 5.8
Dong Jiayu,Song Xianni,Zhang Shuchi,Tan Mengyu,Zhao Haiyan,Wu Donglei
A novel hierarchical Cu/ZSM-5 was prepared over alkaline treatment and incipient wet impregnation method for the catalytic ozonation of polyvinyl alcohol (PVA). Under the optimum preparation conditions, hierarchical Cu/ZSM-5 exhibited an excellent mineralization performance during the PVA degradation process, and the removal rate of TOC after 60 min of reaction was 47.86%, much higher than that of ozonation alone (5.40%). Its high catalytic activity could attribute to the large pore volume (0.27 cm 3 /g) and pore size (6.51 nm) which are beneficial for the distribution of loaded copper and adsorption performance for PVA. Compared to ·OH, 1 O 2 (2.66 times in 10 min) contributed more to the removal of PVA. The degradation of PVA was a combined process of direct ozone oxidation, catalytic ozonation and adsorption. With its high catalytic performance and stability, hierarchical Cu/ZSM-5 has a very broad application prospect in the process of catalytic ozonation of refractory pollutants.
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Nano Research
·
2023
·Vol. 16
·期 8
·11139-11148
·
IF 9.9
Li Na,Liu Wan,Zheng Xiaoyan,Wang Qing,Shen Lixin,Hui Junfeng,Fan Daidi
Burns are a common medical problem globally, and wound infection is one of the major causes of inducing related complications. Although antibiotics effectively prevent wound infections, the misuse of antibiotics has created a new problem of superbugs. Herein, we propose a new strategy to obtain pH-responsive antimicrobial P-ZIF (ZIF: zeolitic imidazolate framework) by loading polyhexamethylenebiguanide (PHMB) into the framework of ZIF-8 nanoparticles. This will enable PHMB to be released in the weak acid environment of an infected wound. To address burn infections, P-ZIF nanoparticles were loaded into a hydrogel system made of sodium alginate (SA) and 3-aminophenylboronic acid modified human-like collagen (H-A) through borate ester bonds. The resulting H-A/SA/P-ZIF (HASPZ) hydrogel dressing not only possesses antibacterial and wound healing properties but also has dual pH responsiveness to prevent the overuse of medication while effectively treat deep second-degree burns. Therefore, P-ZIF nanoparticles and the corresponding HASPZ hydrogel dressing are considered of significant importance in antimicrobial, drug delivery, and wound repair.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-15
·
IF 16.6
Yao Guang,Mo Xiaoyi,Liu Shanshan,Wang Qian,Xie Maowen,Lou Wenhao,Chen Shiyan,Pan Taisong,Chen Ke,Yao Dezhong,Lin Yuan
The cornea is a tissue susceptible to various injuries and traumas with a complicated cascade repair process, in which conserving its integrity and clarity is critical to restoring visual function. Enhancing the endogenous electric field is recognized as an effective method of accelerating corneal injury repair. However, current equipment limitations and implementation complexities hinder its widespread adoption. Here, we propose a snowflake-inspired, blink-driven flexible piezoelectric contact lens that can convert mechanical blink motions into a unidirectional pulsed electric field for direct application to moderate corneal injury repair. The device is validated on mouse and rabbit models with different relative corneal alkali burn ratios to modulate the microenvironment, alleviate stromal fibrosis, promote orderly epithelial arrangement and differentiation, and restore corneal clarity. Within an 8-day intervention, the corneal clarity of mice and rabbits improves by more than 50%, and the repair rate of mouse and rabbit corneas increases by over 52%. Mechanistically, the device intervention is advantageous in blocking growth factors’ signaling pathways specifically involved in stromal fibrosis whilst preserving and harnessing the signaling pathways required for indispensable epithelial metabolism. This work put forward an efficient and orderly corneal therapeutic technology utilizing artificial endogenous-strengthened signals generated by spontaneous body activities.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2023
·Vol. 52
·期 9
·5964-5974
·
IF 2.1
Zhou Xuebin,Ying Zhihua,He Xingxin,Zhang Chenhan,Zheng Xiaolong,Zheng Peng
Cellulose nanofiber (CNF), a natural polymer material with a high specific surface area, is a potential candidate for gas sensors. Here, we report Au/SnO 2 composites with excellent performance synthesized by a chemical precipitation method based on CNF-assisted synthesis, and a series of Au/SnO 2 composites were prepared by adjusting the Au content. The sensitivity of the 1.5 wt.% Au/SnO 2 sensor to a low concentration of 1 ppm NO 2 was 53, nearly 17 times higher than that of pure SnO 2 synthesized by CNF, under ultraviolet (UV) irradiation at a wavelength of 365 nm. The crystal structure of the composite was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), revealing that the composites had high crystallinity and particles reaching the nanoscale. Further experimental data showed that the CNF-assisted synthesis Au/SnO 2 sensors had good selectivity, repeatability, and stability. Additionally, the sensor is able to maintain its excellent gas sensing performance even under varying humidity conditions.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-11
·
IF 16.6
Liang Zhaoheng,Tian Fei,Yang Gongzheng,Wang Chengxin
Aqueous sodium-ion batteries (AIBs) are promising candidates for large-scale energy storage due to their safe operational properties and low cost. However, AIBs have low specific energy (i.e., <80 Wh kg −1 ) and limited lifespans (e.g., hundreds of cycles). Mn-Fe Prussian blue analogues are considered ideal positive electrode materials for AIBs, but they show rapid capacity decay due to Jahn-Teller distortions. To circumvent these issues, here, we propose a cation-trapping method that involves the introduction of sodium ferrocyanide (Na 4 Fe(CN) 6 ) as a supporting salt in a highly concentrated NaClO 4 -based aqueous electrolyte solution to fill the surface Mn vacancies formed in Fe-substituted Prussian blue Na 1.58 Fe 0.07 Mn 0.97 Fe(CN) 6 · 2.65H 2 O (NaFeMnF) positive electrode materials during cycling. When the engineered aqueous electrolyte solution and the NaFeMnF-based positive electrode are tested in combination with a 3, 4, 9, 10-perylenetetracarboxylic diimide-based negative electrode in a coin cell configuration, a specific energy of 94 Wh kg –1 at 0.5 A g −1 (specific energy based on the active material mass of both electrodes) and a specific discharge capacity retention of 73.4% after 15000 cycles at 2 A g −1 are achieved.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-10
·
IF 16.6
Ren Xinyi,Zhao Jian,Li Xuning,Shao Junming,Pan Binbin,Salamé Aude,Boutin Etienne,Groizard Thomas,Wang Shifu,Ding Jie,Zhang Xiong,Huang Wen-Yang,Zeng Wen-Jing,Liu Chengyu,Li Yanguang,Hung Sung-Fu,Huang Yanqiang,Robert Marc,Liu Bin
While exploring the process of CO/CO 2 electroreduction (CO x RR) is of great significance to achieve carbon recycling, deciphering reaction mechanisms so as to further design catalytic systems able to overcome sluggish kinetics remains challenging. In this work, a model single-Co-atom catalyst with well-defined coordination structure is developed and employed as a platform to unravel the underlying reaction mechanism of CO x RR. The as-prepared single-Co-atom catalyst exhibits a maximum methanol Faradaic efficiency as high as 65% at 30 mA/cm 2 in a membrane electrode assembly electrolyzer, while on the contrary, the reduction pathway of CO 2 to methanol is strongly decreased in CO 2 RR. In-situ X-ray absorption and Fourier-transform infrared spectroscopies point to a different adsorption configuration of *CO intermediate in CORR as compared to that in CO 2 RR, with a weaker stretching vibration of the C–O bond in the former case. Theoretical calculations further evidence the low energy barrier for the formation of a H-CoPc-CO – species, which is a critical factor in promoting the electrochemical reduction of CO to methanol.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 18
·1-13
·
IF 2.8
Li Chaojie,Feng Yonghang,Cui Yi,Zhang Fan,Lv Dongfeng,Liu Pan,Wei Yingna,Wei Hengyong,Bu Jinglong
The NiCo 2 O 4 nanoflakes/SiC fibers composites were prepared by electrospinning, carbon thermal reduction combined with hydrothermal method. The results of SEM, XRD and XPS suggested that the NiCo 2 O 4 nanoflakes/SiC fibers composites were successfully prepared. The NiCo 2 O 4 nanoflakes were generated on the surface of SiC fibers with uniform distribution and loose structure. The NiCo 2 O 4 nanoflakes/SiC fibers composites possess the porous structure and their BET specific surface area is 233.2 m 2 /g. The BJH average pore size and the pore volume are 7.0 nm and 0.4 cm 3 /g, respectively. The structure of fibers and pores can bring the multiple reflections and scatterings, interface polarizations, dipole polarizations and conductivity losses. In addition, there is the synergistic effect of dielectric loss and the magnetic loss in NiCo 2 O 4 nanoflakes/SiC fibers composites. Therefore, the reflection loss of NiCo 2 O 4 nanoflakes/SiC fibers composites could achieve − 56 dB under the thickness of 6 mm at 17.64 GHz, which showed the better microwave absorption behavior than SiC fibers.
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BIOLOGICAL TRACE ELEMENT RESEARCH
·
2023
·
IF 3.9
Peng Huixin,Huang Yanxin,Wei Guangji,Pang Yanfang,Yuan Huixiong,Zou Xiong,Xie Yu’an,Chen Wencheng
Aluminum contamination is a growing environmental and public health concern, and aluminum testicular toxicity has been reported in male rats; however, the underlying mechanisms of this toxicity are unclear. The objective of this study was to investigate the effects of exposure to aluminum chloride (AlCl 3 ) on alterations in the levels of sex hormones (testosterone [T], luteinizing hormone [LH], and follicle-stimulating hormone [FSH]) and testicular damage. Additionally, the mechanisms of toxicity in the testes of AlCl 3 -exposed rats were analyzed by proteomics. Three different concentrations of AlCl 3 were administered to rats. The results demonstrated a decrease in T, LH, and FSH levels with increasing concentrations of AlCl 3 exposure. HE staining results revealed that the spermatogenic cells in the AlCl 3 -exposed rats were widened, disorganized, or absent, with increased severe tissue destruction at higher concentrations of AlCl 3 exposure. Kyoto Encyclopedia of Genes and Genomes (KEGG) and Gene Ontology (GO) enrichment analyses revealed that differentially expressed proteins (DEPs) after AlCl 3 exposure were primarily associated with various metabolic processes, sperm fibrous sheath, calcium-dependent protein binding, oxidative phosphorylation, and ribosomes. Subsequently, DEPs from each group were subjected to protein-protein interaction (PPI) analysis followed by the screening of interactional key DEPs. Western blot experiments validated the proteomics data, revealing the downregulation of sperm-related DEPs (AKAP4, ODF1, and OAZ3) and upregulation of regulatory ribosome-associated protein (UBA52) and mitochondrial ribosomal protein (MRPL32). These findings provide a basis for studying the mechanism of testicular toxicity due to AlCl 3 exposure.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-13
·
IF 16.6
Zhang Ying,Wang Shenqiang,Yang Yinxian,Zhao Sheng,You Jiahuan,Wang Junxia,Cai Jingwei,Wang Hao,Wang Jie,Zhang Wei,Yu Jicheng,Han Chunmao,Zhang Yuqi,Gu Zhen
Effective reprogramming of chronic wound healing remains challenging due to the limited drug delivery efficacy hindered by physiological barriers, as well as the inappropriate dosing timing in distinct healing stages. Herein, a core-shell structured microneedle array patch with programmed functions (PF-MNs) is designed to dynamically modulate the wound immune microenvironment according to the varied healing phases. Specifically, PF-MNs combat multidrug-resistant bacterial biofilm at the early stage via generating reactive oxygen species (ROS) under laser irradiation. Subsequently, the ROS-sensitive MN shell gradually degrades to expose the MN core component, which neutralizes various inflammatory factors and promotes the phase transition from inflammation to proliferation. In addition, the released verteporfin inhibits scar formation by blocking Engrailed-1 ( En1 ) activation in fibroblasts. Our experiments demonstrate that PF-MNs promote scarless wound repair in mouse models of both acute and chronic wounds, and inhibit the formation of hypertrophic scar in rabbit ear models.
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2023
·Vol. 39
·期 3
·516-524
·
IF 3.1
Cheng Xue,Jiang Xinshu,Liu Liquan,Huang Jun
Emerging contaminants(ECs) have aroused great concerns due to their widespread presence as well as their potential health and ecological risks. Currently monitoring data about ECs in Chinese rural areas are still limited. In this study, Taige Canal basin was selected as a typical rural area for a pilot study. The occurrence of ECs, including pharmaceutical and personal care products(PPCPs), pesticides, plasticizers and flame retardants, in surface water and aquaculture ponds, as well as in wastewater treatment facilities, was comprehensively investigated. The effectiveness of rural decentralized wastewater treatment facilities and centralized wastewater treatment plant(WWTP) in removing ECs was also analyzed. Among 126 commonly used pesticides for target analysis, 25 compounds were detected in surface water with high frequency of >80%. Besides, 55 PPCPs, 21 pesticides and 18 other industrial products were identified by non-target analysis using high resolution mass spectrometry(HRMS). Totally 18 compounds were detected in surface water with a frequency of >60% and 6 of them were found in all samples, including irbesartan, valsartan, propazine, buprofezin, bis(2-ethylhexyl) phthalate(DEHP) and tri-(2-chloroisopropyl) phosphate(TCPP), with mean concentrations of 3022, 195, 125, 218, 3738 and 545 ng/L, respectively. There are 29 compounds(11 PPCPs, 8 pesticides and 10 other industrial products) detected in water samples from the aquaculture ponds, of which 13 compounds were found in all three ponds. The removal efficiencies of ECs in wastewater treatment facilities are generally limited, except valsartan(82%–86%), nobiletin(100%) and diisodecylphthalate(100%) were found to be significantly removed.
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CLAYS AND CLAY MINERALS
·
2023
·Vol. 71
·期 1
·106-118
·
IF 2.2
Zhao Fan,Zhang Guangyao,Jiang Yong,Wang Hui,Cao Chi,Qi Yongbo,Wang Qingyun,Zhao Huaiyan
The formation of manganese (Mn) oxides is influenced by environmental conditions and, in some red soils, Mn oxides occur as coatings on the surface of kaolinite particles in the form of colloidal films or fine particles. The present study aimed to explore the types of formation mechanisms of Mn oxide minerals on the surface of kaolinite. Mn oxide minerals synthesized by reducing the Mn in KMnO 4 with a divalent Mn salt (MnSO 4 ) were examined using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The effects of various initial molar ratios of Mn 2+ /Mn 7+ (R = 1:0.67, 1:1, 1:2, and 1:4), cationic species (Na + or Mg 2+ ), synthesis temperatures (30, 60, and 110°C), and amount of added kaolinite (0.25, 0.5, 1.0, 2.0, and 5.0 g) on the formation of Mn oxides were studied. The results showed that Mn oxide mineral types were affected by the initial R value and the background cation. With decreases in the initial R value, the synthesized minerals transformed from cryptomelane to birnessite. The relative mass ratios of kaolinite to Mn oxide were calculated as 1:0.92, 1:0.63, 1:1.15, and 1:1.63. The sodium cation (Na + ) had a greater role than Mg 2+ in promoting the dissolution–recrystallization of birnessite to cryptomelane. The synthesis temperature had no effect on mineral types, but Mn content increased as temperature increased. When the amount of added kaolinite was increased from 0.25 to 5.0 g, Mn oxide minerals formed gradually and transformed from birnessite to cryptomelane. This work revealed a possible formation process and reaction mechanism on the surface of kaolinite particles in some red soils.
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