CRYSTENGCOMM
·
2022
·Vol. 24
·期 14
·2697-2704
·
IF 3.756
Siyu Zhang,Xiaomin Zhang,Lei Dong,Shengjie Zhu,Yangyang Yuan,Lei Xu
In this work, Pt nanoparticles (NPs) were directly encapsulated into MFI-type zeolite (Pt@S-1) via a steam-assisted dry-gel conversion method. The synthesis process included the disaggregation of Pt immobilized SiO2–SH spheres and the in situ crystallization for the synthesis of Pt@S-1. The Pt NPs remained stable during the whole crystallization process and the average size of Pt NPs in the synthesized Pt@S-1 was from 1.54 to 2.34 nm. The highest encapsulation degree of Pt NPs was calculated as 93.8% and decreased slightly to 84.9% with the increase of Pt loading. Owing to the high encapsulation degree of Pt NPs in MFI crystals, the size of Pt NPs after calcination at 800 °C only grew up to 3.19 nm showing significantly high thermal stability. The uniform microporous pores of silicalite-1 zeolite as well as the small size and stable Pt NPs endow the Pt@S-1 catalyst with high activity and stability in the nitrobenzene hydrogenation reaction.
✓ 已验证
DOI
高影响因子
Nano Research
·
2023
·Vol. 17
·期 5
·3752-3760
·
IF 9.9
Chong Ben,Xu Baorong,Li He,Ou Honghui,Yang Guidong
The diffusion, adsorption/desorption behaviors of water molecules and hydrogen molecules are of great importance in heterogeneous photocatalytic hydrogen production. In the study of structure–property–performance relationships, nanoconfined space provides an ideal platform to promote mass diffusion and transfer due to their extraordinary properties that are different from the bulk systems. Herein, we designed and prepared a nanoconfined CdS@SiO 2 -NH 2 nanoreactor, whose shell is composed of amino-functionalized silica nanochannels, and encapsulates spherical CdS as a photocatalyst inside. Experimental and simulated results reveal that the amino-functionalized nanochannels promote water molecules’ and hydrogen molecules’ directional diffusion and transport. Water molecules are enriched in the nanocavity between the core and the shell, and promote the interfacial photocatalytic reaction. As a result, the maximized water enrichment and minimized hydrogen-occupied active sites enable photocatalyst with optimized mass transfer kinetics and localization electron distribution on the CdS surface, leading to superior hydrogen production performance with activity as high as 37.1 mmol·g −1 ·h −1 .
✓ 已验证
DOI
高影响因子
RARE METALS
·
2023
·Vol. 43
·期 3
·1263-1274
·
IF 8.8
Guo Yue,Qin Lin-Jun,Xu Jing,Jiang Xiao-Ping,Yue Xiao-Yu,Hou Yi,Shi Hao,Wang Li-Xi,Zhang Qi-Tu
Optical temperature sensing based on the fluorescence intensity ratio (FIR) of red emission for lanthanide ions holds significant relevance in non-contact temperature measurement for biological application. In this study, the perovskite-structured KZnF 3 is utilized as a host material for Er 3+ to achieve a high-purity upconversion (UC) red emission. The observed Stark splitting of the red emission peak provides evidence of the energy level splitting of Er 3+ . Group theory is employed to decompose the spectral branching of Er 3+ under the point group symmetry of KZnF 3 , allowing for the derivation of Stark splitting energy levels induced by the crystal field effect. The optical temperature-sensing behavior of the red UC luminescence was investigated, specifically examining the FIR of the splitting sub-peaks, which exhibited an exponential relationship with temperature. The KZnF 3 : Yb 3+ , Er 3+ demonstrated a relative sensitivity ( S r ) of 0.00182%·K −1 at 298 K, highlighting its excellent response to temperature. Ex vivo bio-thermometry experiments conducted on chicken breast validated the material's ability to penetrate biological tissues and showed its significant sensitivity of the FIR to temperature. These results establish KZnF 3 :Yb 3+ , Er 3+ as a promising material for optical thermometry in various biological applications. Graphic abstract
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2014
·
IF 5.03
Hongwei Lei,Guojia Fang,Fei Cheng,Weijun Ke,Pingli Qin,Zengcai Song,Qiao Zheng,Xi Fan,Huihui Huang,Xingzhong Zhao
In this article, we in situ fabricated copper sulfide (CuS) on fluorinated tin oxide (FTO) substrate using a low temperature and low cost hydrothermal method and then organic solar cells (OSCs) were fabricated by using a thin layer of CuS film as hole transporting layer (HTL). Our CuS films, consisting of two-dimensional (2D) intersected hexagonal nanosheets , are stoichiometric and show p-type electrical conductivity , a good transparency and a high hole mobility. The Fermi level , valence and conduction band energies for CuS HTL are characterized in detail through photoelectron spectroscopy studies. The small energy barrier between the valance band of CuS and the HOMO of poly(3-hexylthiophene) (P3HT) and the high hole mobility and electrical conductivity of CuS nanosheet film benefit for the hole transporting. Therefore, CuS HTL to OSCs results in a power conversion efficiency of 3.4% with P3HT and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as the active layer , which is a 13.3% increase in performance than devices with a poly (3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT: PSS) HTL. Therefore, low-cost, environmental friendly and stable CuS is an appropriate choice for hole transporting materials (HTMs) in OSCs.
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Yahong Yang,Min Hu,Wanmeng Lu,Lixia Xue,Xiufeng Lin,Enlu Liu
Pharmaceuticals and personal care products (PPCPs) contain a diverse range of organic groups that present a serious threat to the ecological environment and human health. However, their actual fate in rivers remains only partially understood. The occurrence, distribution, and risk assessment of PPCPs in aquatic systems have received global research attention. However, few studies have focused on the Longgang River in Shenzhen City, South China. This study was the first to simultaneously identify and quantify five PPCPs residues in the mainstream of Longgang River. All surface water and sediment samples were analyzed by solid-phase extraction (SPE) and high-performance liquid chromatography coupled with tandem mass spectrometry (HPLC-MS/MS). The five assessed PPCPs were all detected in the mainstream of the Longgang River, with sediment concentrations much higher than water concentrations. Fluconazole and Triclosan were the dominant PPCPs in water and sediments, with maximum concentrations of 55.86 ng/L and 19.24 μg/kg, respectively. Others were present at mean concentrations below 40 ng/L in water and 15 μg/kg in sediments. The recovery rates of the five PPCPs ranged from 57.2% to 110.6%, which were within the limits of reliability. These results demonstrate that sewage treatment plants exhibited different degrees of removal effects for the five PPCPs and showed a natural attenuation trend along the Longgang River for all PPCPs except carbamazepine. The trace amounts of individual PPCPs residues in the river posed a low risk to aquatic organisms in the mainstream, although the potential risks created by low dose exposure and bioaccumulation of PPCPs should be considered.
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 20
·3551
·
IF 5.719
Chong Wang,Jian-Hao Lu,An-Bang Wang,Hao Zhang,Wei-Kun Wang,Zhao-Qing Jin,Li-Zhen Fan
The shuttling effect of soluble lithium polysulfides (LiPSs) and the sluggish conversion kinetics of polysulfides into insoluble Li2S2/Li2S severely hinders the practical application of Li-S batteries. Advanced catalysts can capture and accelerate the liquid–solid conversion of polysulfides. Herein, we try to make use of bismuth tantalum oxide with oxygen vacancies as an electrocatalyst to catalyze the conversion of LiPSs by reducing the sulfur reduction reaction (SRR) nucleation energy barrier. Oxygen vacancies in Bi4TaO7nanoparticles alter the electron band structure to improve instinct electronic conductivity and catalytic activity. In addition, the defective surface could provide unsaturated bonds around the vacancies to enhance the chemisorption capability with LiPSs. Hence, a multidimensional carbon (super P/CNT/Graphene) standing sulfur cathode is prepared by coating oxygen vacancies Bi4TaO7−xnanoparticles, in which the multidimensional carbon (MC) with micropores structure can host sulfur and provide a fast electron/ion pathway, while the outer-coated oxygen vacancies with Bi4TaO7−xwith improved electronic conductivity and strong affinities for polysulfides can work as an adsorptive and conductive protective layer to achieve the physical restriction and chemical immobilization of lithium polysulfides as well as speed up their catalytic conversion. Benefiting from the synergistic effects of different components, the S/C@Bi3TaO7−xcoin cell cathode shows superior cycling and rate performance. Even under a high level of sulfur loading of 9.6 mg cm−2, a relatively high initial areal capacity of 10.20 mAh cm−2and a specific energy density of 300 Wh kg−1are achieved with a low electrolyte/sulfur ratio of 3.3 µL mg−1. Combined with experimental results and theoretical calculations, the mechanism by which the Bi4TaO7with oxygen vacancies promotes the kinetics of polysulfide conversion reactions has been revealed. The design of the multiple confined cathode structure provides physical and chemical adsorption, fast charge transfer, and catalytic conversion for polysulfides.
✓ 已验证
DOI
高影响因子
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
·
2024
·
IF 3.9
Chao-Fan Yin,Yong Nie,Tao Li,Ning-Yi Zhou
Many Acinetobacter species can grow on n-alkanes of varying lengths (≤C40). AlmA, a unique flavoprotein in these Acinetobacter strains, is the only enzyme proven to be required for the degradation of long-chain (LC) n-alkanes, including C32 and C36 alkanes. Although it is commonly presumed to be a terminal hydroxylase, its role in n-alkane degradation remains elusive. In this study, we conducted physiological, biochemical, and bioinformatics analyses of AlmA to determine its role in n-alkane degradation by Acinetobacter baylyi ADP1. Consistent with previous reports, gene deletion analysis showed that almA was vital for the degradation of LC n-alkanes (C26–C36). Additionally, enzymatic analysis revealed that AlmA catalyzed the conversion of aliphatic 2-ketones (C10–C16) to their corresponding esters, but it did not conduct n-alkane hydroxylation under the same conditions, thus suggesting that AlmA in strain ADP1 possesses Baeyer–Villiger monooxygenase (BVMO) activity. These results were further confirmed by bioinformatics analysis, which revealed that AlmA was closer to functionally identified BVMOs than to hydroxylases. Altogether, the results of our study suggest that LC n-alkane degradation by strain ADP1 possibly follows a novel subterminal oxidation pathway that is distinct from the terminal oxidation pathway followed for short-chain n-alkane degradation. Furthermore, our findings suggest that AlmA catalyzes the third reaction in the LC n-alkane degradation pathway.
✓ 已验证
DOI
PubMed
高影响因子
PLOS BIOLOGY
·
2024
·Vol. 22
·期 2
·e3002518
·
IF 7.8
Ying-Di Wang,Shu-Ting Bao,Yuan Gao,Jin Chen,Tao Jia,Cui Yin,Jun-Li Cao,Cheng Xiao,Chunyi Zhou
Neurons in the subthalamic nucleus (STN) become hyperactive following nerve injury and promote pain-related responses in mice. Considering that the anterior cingulate cortex (ACC) is involved in pain and emotion processing and projects to the STN, we hypothesize that ACC neurons may contribute to hyperactivity in STN neurons in chronic pain. In the present study, we showed that ACC neurons enhanced activity in response to noxious stimuli and to alterations in emotional states and became hyperactive in chronic pain state established by spared nerve injury of the sciatic nerve (SNI) in mice. In naïve mice, STN neurons were activated by noxious stimuli, but not by alterations in emotional states. Pain responses in STN neurons were attenuated in both naïve and SNI mice when ACC neurons were inhibited. Furthermore, optogenetic activation of the ACC-STN pathway induced bilateral hyperalgesia and depression-like behaviors in naive mice; conversely, inhibition of this pathway is sufficient to attenuate hyperalgesia and depression-like behaviors in SNI mice and naïve mice subjected to stimulation of STN neurons. Finally, mitigation of pain-like and depression-like behaviors in SNI mice by inhibition of the ACC-STN projection was eliminated by activation of STN neurons. Our results demonstrate that hyperactivity in the ACC-STN pathway may be an important pathophysiology in comorbid chronic pain and depression. Thus, the ACC-STN pathway may be an intervention target for the treatment of the comorbid chronic pain and depression.
✓ 已验证
DOI
PubMed
高影响因子
Chemosensors
·
2025
·Vol. 13
·期 4
·138
·
IF 3.7
Yuqi Liu,Nan Qiu,Zhihao Zhang,Yang Li,Chao Bian
In this study, an in situ electrochemical modulation method based on an ultramicro interdigitated array electrode (UIAE) sensor chip was developed for the detection of ammonia nitrogen (NH3-N) in neutral aqueous solutions. One comb of the UIAE was used as the working electrode for both the modulating and sensing functions, while the other comb was used as the counter electrode. Utilizing its enhanced mass transfer and proximity effects, the feasibility of in situ modulation of the solution environment near the UIAE chip to generate an electrochemical response for NH3-N was investigated using electrochemical methods. The proposed method enhances the concentration of hydroxide ions and active chloride in the local solution near the sensor chip. These reactive species play a key role in improving the sensor’s electrocatalytic oxidation capability toward ammonia nitrogen, facilitating the sensitive detection of ammonia nitrogen in neutral environments. A linear relationship was displayed, ranging from 0.15–2.0 mg/L (as nitrogen) with a sensitivity of 3.7936 µA·L·mg−1(0.0664 µA µM−1mm−2), which was 2.45 times that in strong alkaline conditions without modulation. Additionally, the relative standard deviation of the measurement remained below 2.9% over five days of repeated experiments, indicating excellent stability.
✓ 已验证
DOI
高影响因子
Journal of Advanced Research
·
2020
·
IF 6.992
Hanli Guo,Weifeng Yin,Ziling Zou,Chao Zhang,Minghui Sun,Lingtian Min,Lei Yang,Lingyi Kong
Introduction: Disruptions of extracellular matrix (ECM) degradation homeostasis play a significant role in the pathogenesis of osteoarthritis (OA). Matrix metalloproteinase 13 (MMP13) and collagen Ⅱ are important components of ECM. Earlier we found that quercitrin could significantly decrease MMP13 gene expression and increase collagen Ⅱ gene expression in IL-1β-induced rat chondrocytes and human chondrosarcoma (SW1353) cells. Objectives: The effects and mechanism of quercitrin on OA were explored. Methods: Molecular mechanisms of quercitrin on OA were studied in vitro in primary chondrocytes and SW1353 cells. An anterior cruciate ligament transection (ACLT) rat model of OA was used to investigate the effect of quercitrin in vivo. Micro-CT analysis and Safranin O-Fast Green Staining of knee joint samples were performed to observe the damage degree of tibial subchondral bone. Immunohistochemistry of knee joint samples were conducted to observe the protein level of MMP13, collagen Ⅱ and p110α in articular cartilage. Results: In vitro, quercitrin promoted cell proliferation and delayed ECM degradation by regulating MMP13 and collagen II gene and protein expressions. Moreover, quercitrin activated the Phosphatidylinositol 3-kinase p110α (p110α)/AKT/mTOR signaling pathway by targeting p110α. We also firstly showed that the gene expression level of p110α was remarkably decreased in cartilage of OA patients. The results showed that intra-articular injection of quercitrin increased bone volume/tissue volume of tibial subchondral bone and cartilage thickness and reduced the Osteoarthritis Research Society International scores in OA rats. Meanwhile, immunohistochemical results showed that quercitrin exerted anti-OA effect by delaying ECM degradation. Conclusion: These findings suggested that quercitrin may be a prospective disease-modifying OA drug for prevention and treatment of early stage OA.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Toxics
·
2024
·Vol. 12
·期 4
·288
·
IF 3.9
Kun Zhou,Miaomiao Tang,Wei Zhang,Yanling Chen,Yusheng Guan,Rui Huang,Jiawei Duan,Zibo Liu,Xiaoming Ji,Yingtong Jiang,Yanhui Hu,Xiaoling Zhang,Jingjing Zhou,Minjian Chen
The increasing use of molybdate has raised concerns about its potential toxicity in humans. However, the potential toxicity of molybdate under the current level of human exposure remains largely unknown. Endogenous metabolic alterations that are caused in humans by environmental exposure to pollutants are associated with the occurrence and progression of many diseases. This study exposed eight-week-old male C57 mice to sodium molybdate at doses relevant to humans (0.01 and 1 mg/kg/day) for eight weeks. Inductively coupled plasma mass spectrometry (ICP-MS) and ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS) were utilized to assess changes in urine element levels and serum metabolites in mice, respectively. A total of 838 subjects from the NHANES 2017–2018 population database were also included in our study to verify the associations between molybdenum and cadmium found in mice. Analysis of the metabolome in mice revealed that four metabolites in blood serum exhibited significant changes, including 5-aminolevulinic acid, glycolic acid, l-acetylcarnitine, and 2,3-dihydroxypropyl octanoate. Analysis of the elementome revealed a significant increase in urine levels of cadmium after molybdate exposure in mice. Notably, molybdenum also showed a positive correlation with cadmium in humans from the NHANES database. Further analysis identified a positive correlation between cadmium and 2,3-dihydroxypropyl octanoate in mice. In conclusion, these findings suggest that molybdate exposure disrupted amino acid and lipid metabolism, which may be partially mediated by molybdate-altered cadmium levels. The integration of elementome and metabolome data provides sensitive information on molybdate-induced metabolic disorders and associated toxicities at levels relevant to human exposure.
✓ 已验证
DOI
PubMed
高影响因子
MARINE BIOTECHNOLOGY
·
2025
·Vol. 27
·期 1
·1-16
·
IF 2.8
Bai Ying,Yang Gan,Liu Tongde,Chen Fuyan,Xia Junhong
During wintering, red tilapia may develop variable black spots on their bodies, significantly reducing their market value. Understanding the mechanisms driving this phenomenon is essential for molecular improvements in body color. In this study, we investigated chromatin accessibility landscapes in the eyes of red tilapia with two distinct phenotypes (normal pure red and black spot) under wintering stress using ATAC-seq and RNA-seq analyses. We observed that approximately 32.7% of chromatin accessibility peaks were located in promoter regions, followed by intergenic regions (32.4%) and intronic regions (26.7%). One thousand two hundred twenty-nine differentially accessible regions (DARs) and 1448 differentially expressed genes (DEGs) were identified between the RS and DS groups. Notably, DEGs associated with melanin synthesis, including tyrp1 , tyr , tyrp1b , pmela , slc24a5 , and mlph , were significantly upregulated in the DS group, which aligns with the observed 1.85-fold increase in melanin content, compared to the RS group. 92 DEGs were associated with significant changes in chromatin accessibility between groups ( R 2 = 0.8059; p < 0.0001), indicating potential regulatory relationships. Interestingly, 23.92% of the DARs were located on the chromosome 3. Specifically, a 2.5-fold difference in average peak height on LG3: 11,215,273–11,217,225 were observed between DS and RS tilapia. In the region, transcription factors including HSF1 and HSF2 were identified as key regulators of chromatin structure and gene expression under wintering stress. Our findings reveal that dynamic chromatin accessibility in the eyes of red tilapia facilitates adaptation to wintering stress by regulating visual signaling, melanin production, and downstream pigmentation.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）