Carbon Neutralization
·
2025
·Vol. 4
·期 4
·e70021
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IF 12
Luotian Lv,Yao Liu,Xuanheng Li,Yankai Huang,Tong Li,Hongwei Jian,Yanan Fan,Haili Song,Han Feng,Yongqing Wang
Although extensive research has been conducted on cation vacancies in photocatalysts, the significance of vacancy defects in photocatalytic reactions and deep-going understanding of the intrinsic mechanisms are still limited. Herein, an appropriate introduction of zinc vacancies on ZnIn 2 S 4 (ZIS) is rationally designed through Er or La (Er/La)-doping. Aberration-corrected scanning transmission electron microscopy (STEM) directly demonstrates distinct zinc vacancies (V Zn ), which is also confirmed by electron spin resonance analysis. The results of experiments and density functional theory (DFT) calculations manifest that Er/La-doping not only promotes the formation of V Zn but also enhances the built-in electric field, thus facilitating the rapid transfer of carriers. In addition, femtosecond transient absorption spectroscopy (fs-TAS) reveals that V Zn induces a supplementary charge transfer pathway, thereby enhancing charge separation efficiency. As a result, the desired photocatalytic CO 2 reduction reaction (CO 2 RR) to syngas capacity is finally achieved on Er 0.2 -ZIS, with tunable H 2 /CO ratios, exceeding that of untreated ZIS by over 2 times. This study not only exploits a novel avenue to develop high-activity cation vacancies photocatalysts but also provides new perspectives in regulating the photogenerated carrier dynamics.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Manting Zeng,Xingzhong Liu,Hua Hao,Zhonghua Yao,Hanxing Liu
BaTiO 3 -1.6MnO 2 - x Er 2 O 3 ceramics (abbreviated as BMT- x Er) and BaTiO 3 -1.6MnO 2 -3Er 2 O 3 - x MgO ceramics (abbreviated as BEMT- x Mg) were prepared under a reducing atmosphere by solid-state synthesis method in this work. The effects of Er/Mg co-doping on phase transformation, microstructure, dielectric properties, and defect were systematically investigated. Research shows that Er-doping reduces the Curie temperature and increases the dielectric constant of BaTiO 3 ceramics at low temperatures. Mg-doping refines the grain size and makes the grain size distribution more uniform, which is an important reason for the enhanced bias stability. The substitution of Mg at the B-site generates additional oxygen vacancies which capture free electrons and simultaneously forms defect dipoles. The anti-reducing properties are improved by reducing the carrier concentration. The synergistic effect of co-doping forms defect dipoles such as [ Mg Ti ″ ‐ 2 Er Ba ∙ ] , [ Mg Ti ″ ‐ V O ∙ ∙ ] and [ 2 Er Ti ′ ‐ V O ∙ ∙ ] to enhance dielectric relaxation behavior which is considered to be the reason for the improved dielectric temperature stability. When x = 0.4, optimized dielectric ceramics are obtained with ε 25°C = 1820, tanδ = 0.009, resistivity of 1.0 × 10 11 Ω·cm, which meets the EIA X7R standard (−55 °C - 125 °C, TCC ≤ ± 15 %).
研究领域:
材料科学
·
电子工程
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Lingling Wang,Yunning Chen,Yuxin Zheng,Xueying Cheng,Jiawei Hao,Qingkun Shang
Eight composite photocatalysts were synthesized. Er- and Fe-doped TiO 2 photocatalysts were prepared first, and their photocatalytic performance for phenol degradation was investigated. Furthermore, three pyridine derivatives and 1,10-phenanthroline were bonded to Er-Fe-TiO 2 , which greatly improved the efficiency and rate of photocatalytic degradation of phenol and chlortetracycline hydrochloride. The absorption spectra, fluorescence spectra, photocurrent density, impedance spectra, and ESR radical measurements of eight different photocatalysts were investigated. On this basis, combined with a discussion on the matching of the molecular orbital energy levels of pyridine derivatives and 1,10-phenanthroline with the band gap of Er-Fe-TiO 2 , a possible mechanism of electron transport was proposed for the photocatalysis process. We studied the degradation of chlortetracycline hydrochloride or a mixture of phenol and four antibiotics using four composite photocatalysts. The possible degradation sites of chlortetracycline hydrochloride were predicted by theoretical calculations, and some results were consistent with those detected by HPLC-MS.
研究领域:
环境科学
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材料科学
·
化学
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SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yi-Min Shan,Kang-Kang Yu,Nan Wang,Fan-Yuan Yu,Kun Li,Yan-Hong Liu,Xiao-Qi Yu
More evidence supports that endoplasmic reticulums stress (ER stress) has close relationship with many disease, including Alzheimer’s disease, and such diseases are often closely related to senescence. Both ER stress and senescence involve disorder of redox regulation and may further cause ClO - accumulation. It is of great importance to develop a tool to visualize ralated organelles to investigate the role of ClO - during ER stress or senescence. In this work, a novel dual-targetable ClO - probe RT-ER was designed, and the probe could image endoplasmic reticulums and lysosome by sequence under stimulation of ClO - . RT-ER worked in a ratiometric manner and was extremely sensitive to ClO - ( ~ 484 folds enchancement within 10 s after the stimulation of ClO - ). RT-ER showed great biocompatibility and was further applied in living cells imaging. We demonstrated that RT-ER enables both exogenous and endogenous ClO - imaging. Compared with the commercial dye Lysosome-Tracker Deep Red, RT-ER showed better photobleaching resistance. We successfully used RT-ER to track the interaction between endoplasmic reticulum and lysosome after ClO - accumulation. More importantly, with the help of RT-ER, we further revealed the level of ClO - change during ER stress and senescence, which will facilitate the functional study of ClO - −disease contacts.
研究领域:
生物化学
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分子生物学
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细胞生物学
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疾病机制
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Materials
·
2026
·Vol. 19
·期 11
·2352
·
IF 3.7
Xinggui Lei,Shifeng Liu,Qiuyan Xie,Yue Zhang,Binni Zou,Yuan Yuan
HighlightsPTFE/SiO2–ER/FR superhydrophobic coatings for anti-icing and de-icing of insulators were designed.The micro/nanoscale hierarchical structure imparts good superhydrophobicity to PTFE/SiO2–ER/FR.PTFE/SiO2–ER/FR superhydrophobic coatings achieve good durability against UV irradiation or freeze–thaw cycling.PTFE/SiO2–ER/FR superhydrophobic coatings possess good anti-icing and de-icing performance under natural icing conditions.This work describes the preparation of PTFE (polytetrafluoroethylene)/SiO2(silicon dioxide)–ER (epoxy resin)/FR (fluorosilicone resin) superhydrophobic coatings using the spray method to improve the anti-icing and de-icing performance of transmission line insulators. The coatings exhibit a consistent fluorine distribution (32.86 wt%), which enhances their low surface energy, alongside SiO2nanoparticles that occupy the interstices between PTFE particles, resulting in a dense micro- and nanoscale hierarchical structure. Consequently, the coatings have good superhydrophobicity, featuring a contact angle of 173.9° and roll angle of 1.2°. Following 66 days of UV irradiation, the contact angle remains above 150°, and the roll angle is approximately 15°, accompanied by a slight increase in ice adhesion strength. Following 26 freeze–thaw cycles, the contact angle stabilizes at around 157°, showing good environmental durability. Natural icing studies validate the coatings’ good anti-icing and de-icing efficacy: in comparison to common insulators, the coated insulators demonstrate a 14.2% reduction in ice accretion weight and a 67.7% reduction in maximum ice ridge length.
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FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2023
·
IF 2.3
Yuzhe Zhang,Jie Hua,Meiwen Zhao,Hao Wu,Yizi Shao,Man Zhou,Peiyang Gu,Zhongyu Li
Considering the economic benefits and environmental pollution, it is of great significance to recover rare earth elements from wastewater. In this article, the modified bacterial cellulose is the raw material, and multi-wall carbon nanotubes are added to construct together. The ion imprinting technology is introduced to prepare a silicon-based modified film for the recovery of Er(III) and selectively adsorption function of Er(III) in experiments. The maximum adsorption amount of modified carbon nanotube silicon bacterial cellulose composite imprinted membrane can reach 46.52 mg L−1, and the adsorption capacity is greatly improved compared to other methods that of the non-imprinted membrane. The adsorption efficiency of Er(III) can reach 92%.
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Acta Biomaterialia
·
2023
·
IF 9.7
Xiaoli Feng,Tian Lin,Dong Chen,Zhiyang Li,Qiuping Yang,Huiting Tian,Yao Xiao,Mingzhen Lin,Min Liang,Weihong Guo,Peng Zhao,Zhaoze Guo
Chemodynamic therapy (CDT) can effectively induce immunogenic cell death (ICD) in tumours and is thus a promising strategy for boosting the efficacy of immunotherapy. However, the mechanism by which CDT enhances ICD and lowers ICD efficiency is unknown and this restricts its clinical application. In this study, a second near-infrared (NIR-II) window irradiation-triggered hydrogen peroxide (H 2 O 2 ) self-supplying nanocomposite ((Cu 2 Se-CaO 2 )@LA) was constructed. The modified lauric acid was melted by the heat energy of the NIR-II irradiation, to expose the CaO 2 nanoparticles, and they then reacted with water to produce H 2 O 2 and Ca 2+ . H 2 O 2 was then converted to hydroxyl radicals by the photothermal-enhanced CDT process of the Cu 2 Se nanocubes. Notably, the CDT and Ca 2+ overload was found to induce sequential damage to the mitochondria and endoplasmic reticulum (ER), which upregulated the PERK-mediated eIF2α phosphorylation pathway and caused subsequent ICD. NIR-II irradiation of the (Cu 2 Se-CaO 2 )@LA also increased reactive oxygen species (ROS) formation and this was sufficient to increase dendritic cell maturation, attracting cytotoxic T lymphocytes, and suppressing tumour growth in vivo. Overall, we demonstrated that an enhanced CDT strategy under NIR-II exposure and H 2 O 2 self-supply can induce extensive ICD by inducing mitochondria-associated ER stress, which represents a highly effective and promising strategy for ICD amplification and tumour immunotherapy. Statement of significance In this study, a second near-infrared window (NIR-II) irradiation-triggered and H 2 O 2 self-supplying nanocomposite (named (Cu 2 Se-CaO 2 )@LA) was constructed and tested both in vitro and in vivo . These nanoparticles demonstrated promising antitumor activity as designed. Mechanistically, the nanoparticles could damage mitochondria and upregulate the PERK-mediated eIF2αphosphorylation pathway, further causing endoplasmic reticulum stress, and inducing immunogenic cell death through dendritic cell maturation and cytotoxic T lymphocyte recruitment augmented activity. This system represents a highly effective and promising strategy for enhancing tumor immunotherapy and provides new insights for future studies and design refinements.
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JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Shuopan Dun,Siqi Zhang,Xugeng Guo,Jinglai Zhang
Introducing upconversion nanoparticles (UCNPs) onto photoanode films is an effective way to enhance the photovoltaic performance of dye-sensitized solar cells (DSSCs). In this contribution, the β -NaYGdF 4 :Yb, Er UCNPs and β -NaYGdF 4 :Yb,Er@SiO 2 nanoparticles (NPs) were prepared by tuning the dopant contents of the Gd ions and the β -NaYGdF 4 :Yb,Er@SiO 2 NPs were applied as an upconverting layer in DSSCs. Upconversion photoluminescence indicates that the UCNPs doped with 5% Gd ions exhibit the strongest green and red fluorescence emissions . Moreover, the DSSCs device incorporating the NPs with 5% Gd ion dopant can achieve an optimal photovoltaic efficiency of 5.89%, which is 20.20% enhancement in comparison to the device without NPs and 16.17% increasement with respect to the device containing β -NaYF 4 :Yb,Er@SiO 2 nanocrystals , thus highlighting the effect of the doping of the Gd ions in nanoparticles on their upconversion photoluminescence and photoelectric performance. Accordingly, the current results offer a feasible strategy for further regulating the photoluminescence property of UCNPs and optimizing the photovoltaic performance of UCNPs-based DSSCs devices.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Hongfeng Chai,Ying Li,Yifan Luo,Marc Debliquy,Chao Zhang
The early detection of lung cancer by breath analysis has attracted more and more attention. In this work, high-performance LnFeO 3 (Ln = Nd, Dy, Er) based isopropanol sensors were synthesized by microwave-assisted hydrothermal method. X-ray diffraction, field-emission scanning electron microscope, transmission electron microscope, and UV–visible-near infrared absorption spectrometer were used to analyze the material phase composition, microstructure, and other physical properties. The sensing performance was tested by using a four-channel gas testing chamber. The sensors were tested with low concentrations of isopropanol at high humidity to simulate a real human exhaled breath environment. The low binding energy of the Ln-O bond makes it easy to have chemical reactions, which leads to excellent isopropanol sensing performance. Finally, the gas sensing mechanism of the LnFeO 3 sensor was discussed.
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INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Jingbo Yu,Lili Hu,Yujing Shen,Jinjun Ren
A series of glasses with composition 60NaPO3–(40-x)CdF2–xYF3–yEr2O3 were synthesized via melt-quenching methods and subsequently heat-treated to obtain upconversion luminescent glass ceramics containing NaYF4:Er crystals. Hexagonal and/or cubic NaYF4 crystals were controlled to be bred in the glasses by changing the glass composition. The structure evolution driven by crystallization was characterized using advanced solid-state nuclear magnetic resonance (SSNMR) techniques. The SSNMR results reveal that the Y/Na ratio determines the crystalline phases of NaYF4 precipitated in this glass system. Y3+ attracts extra F– ions from P5+ and Cd2+ during crystallization because of its stronger ability to attract F– ions, leading to most Y3+ ions being crystallized into the NaYF4 crystals. The paramagnetic broadening effect of the Er3+ ions on NMR signals as well as the upconversion luminescence results indicate that, before crystallization, most Er3+ ions are surrounded by oxygen within the glasses; however, after crystallization, almost all of them enter the NaYF4 crystals. On the basis of this local structure investigation, a composition design strategy is developed to obtain highly efficient upconversion luminescent glass ceramics.
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JOURNAL OF PROTEOME RESEARCH
·
2021
·
IF 4.466
Peng Ma,Zijing Wang,Yisa Wang,Biyu Hou,Jialin Sun,He Tian,Bowen Li,Guanghou Shui,Xiuying Yang,Xinyu Yang,Guifen Qiang,Chong Wee Liew,Guanhua Du
Once protein synthesis is excessive or misfolded protein becomes aggregated, which eventually overwhelms the capacity of the endoplasmic reticulum (ER), a state named ER stress would be reached. ER stress could affect many tissues, especially the liver, in which nonalcoholic fatty liver disease, liver steatosis, etc. have been reported relative. However, there is still a lack of systematic insight into ER stress in the liver, which can be obtained by integrating metabolomics and transcriptomics of the tissue. Here, tunicamycin was utilized to induce ER stress in C57BL/6N mice. Microarray and untargeted metabolomics were performed to identify the genes and metabolites significantly altered in liver tissues. Surprisingly, apart from the predictable unfolded protein response, liver lipid, arginine, and proline metabolisms were affirmed to be related to ER stress. Also, the ketone body metabolism changed most prominently in response to ER stress, with few studies backing. What is more, succinate receptor 1 (Sucnr1) may be a novel marker and therapeutical target of liver ER stress. In this study, the combination of the metabolome and transcriptome provided reliable information about liver pathological processes, including key relative pathways, potential markers, and targets involved in ER stress of the liver.
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ACS Nano
·
2020
·
IF 14.588
Yuan Liu,Gongxun Bai,Yongxin Lyu,Youjie Hua,Renguang Ye,Junjie Zhang,Liang Chen,Shiqing Xu,Jianhua Hao
Realizing multicolored luminescence in two-dimensional (2D) nanomaterials would afford potential for a range of next-generation nanoscale optoelectronic devices. Moreover, combining fine structured spectral line emission and detection may further enrich the studies and applications of functional nanomaterials. Herein, a lanthanide doping strategy has been utilized for the synthesis of 2D ZnSe:Er3+ nanosheets to achieve fine-structured, multicolor luminescence spectra. Simultaneous upconversion and downconversion emission is realized, which can cover an ultrabroadband optical range, from ultraviolet through visible to the near-infrared region. By investigating the low-temperature fine structure of emission spectra at 4 K, we have observed an abundance of sublevel electronic energy transitions, elucidating the electronic structure of Er3+ ions in the 2D ZnSe nanosheet. As the temperature is varied, these nanosheets exhibit tunable multicolored luminescence under 980 and 365 nm excitation. Utilizing the distinct sublevel transitions of Er3+ ions, the developed 2D ZnSe:Er3+ optical temperature sensor shows high absolute (15.23% K–1) and relative sensitivity (8.61% K–1), which is superior to conventional Er3+-activated upconversion luminescent nanothermometers. These findings imply that Er3+-doped ZnSe nanomaterials with direct and wide band gap have the potential for applications in future low-dimensional photonic and sensing devices at the 2D limit.
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