Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Jiao Jiqing,Ma Yanbin,Han Xiaoqian,Ergu Awu,Zhang Chao,Chen Pingping,Liu Wei,Luo Qiquan,Shi Zhaolin,Xu Han,Chen Chen,Li Yaguang,Lu Tongbu
CO 2 conversion to CH 3 OH under mild conditions is of particular interest yet rather challenging. Both electro- and thermo-catalytic CO 2 reduction to CH 3 OH can only produce CH 3 OH in low concentration (typically mixed with water), requiring energy-intensive purification processes. Here we design a sun-simulated-driven tandem catalytic system comprising CO 2 electroreduction to syngas, and further photothermal conversion into high-purity CH 3 OH (volume fraction > 97%). We construct a self-supporting electrocatalyst featuring dual active sites of Ni single atoms and encapsulated Co nanoparticles, which could produce syngas with a constant H 2 :CO ratio of ~2 via solar-powered CO 2 electroreduction. The generated syngas is subsequently fed into the photothermal module, which could produce high-purity CH 3 OH under 1 sun-light irradiation, with a rate of 0.238 g CH3OH g cat –1 h –1 . This work demonstrates a feasible and sustainable route for directly converting CO 2 into high-purity CH 3 OH.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 2
·1-9
·
IF 5.3
Xie Hui,Xie Sihui,Jiang Li,Lei Chenghong
Ce-MOFs with ferrocenedicarboxylic acid ligands (Ce-FcDC) as a bifunctional nanozyme exhibited high peroxidase (POD)-mimicking activity and superoxide dismutase (SOD)-mimicking activity. H 2 O 2 was produced from catalytic hydrolysis of peroxymonosulfate (PMS) using Ce-FcDC as a catalyst. The growth of E. coli and S. aureus were synergistically and more effectively suppressed by PMS in the presence of Ce-FcDC, in comparison with the sole use of PMS or Ce-FcDc. Under the catalysis of Ce-FcDC as the POD-mimicking nanozyme, PMS could be activated by Ce-FcDC to produce SO 4 •− and •OH and H 2 O 2 from the hydrolysis of PMS was further derivatized to O 2 •− and •OH. Ce-FcDC as the SOD-mimicking nanozyme causes O 2 •− to form H 2 O 2 . The generation of O 2 •− and •OH were confirmed using p-benzoquinone and isopropanol alcohol as the scavengers. The resulted SO 4 •− , O 2 •− , and •OH from combination of PMS with Ce-FcDC as an activator may have key roles for suppressing the growth of E. coli and S. aureus . This strategy could be an effective approach for suppressing the growth and preventing infections or pollutions of some other microbial cells as well. Graphical abstract
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RARE METALS
·
2025
·
IF 11
Deng Zhe-Zhe,Peng Ying,Xie Yong-Shuai,Zeng Cheng,Li Xin-Hao,Li Jia,Zhu Lu-Yi,Liu Xiao-Long
Thorium dioxide (ThO 2 ) fibers exhibit exceptional structural stability, low density and superior flexibility, coupled with a remarkably high melting point, positioning them as promising candidates for thermal protection applications. Additionally, their commendable secondary processing characteristics enable the development of diverse composite materials when integrated with other materials, significantly broadening the potential utilization of ThO 2 materials and thorium resources in industrial fields. In this work, the ThO 2 fiber was fabricated by the sol–gel precursor method, and the precursor with good spinnability and excellent stability was synthesized for the first time. The ThO 2 fiber with a mean diameter of 868 nm is both highly flexible and strong (max. tensile strength 2.21 MPa), capable of bending freely across a wide temperature range from − 196 °C (in liquid nitrogen) to 1200 °C. Meanwhile, it exhibits excellent temperature stability and heat insulation properties. The ThO 2 nanofiber membranes with layered structure have low density (32–37 mg·cm −3 ), low thermal conductivity (27.3–30.1 mW·m −1 ·K −1 @25 °C). The ThO 2 nanofiber membranes with 15 mm thickness can reduce the temperature from 1200 to 282 °C and maintain a high aspect ratio and bendability after 1200 °C@90 min. The results show that the ThO 2 fiber can be used as a new kind of high-temperature resistant material. Graphical abstract
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JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2024
·Vol. 110
·期 3
·678-689
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IF 2.3
Hou Ruiting,Wang Shaozheng,Wang Haishan,Tian Lanlan,Zhu Xiangxiang,Li Yule,Chen Qingming,Zhang Hui
La 1- x Ca x MnO 3 , as a candidate for thermal radiation detectors, has received more attention due to the quest for a higher temperature coefficient of resistance (TCR), however, the narrow high-TCR temperature range greatly limits its application in uncooled bolometer. In this paper, Mn 3 O 4 - La 1- x Ca x MnO 3 ( x = 0–0.33) composite ceramics were prepared using the sol-gel method. A suitable TCR was achieved over a wide temperature range, including room temperature, by adjusting the Ca content. As the Ca content decreased, the resistivity ( ρ ) of the composite gradually increased at 300 K, and the positive TCR (PTC) peak shifted to a lower temperature. However, the negative TCR (NTC) was enhanced over a wider temperature range. When x = 0.05, the maximal NTC was −3.2%·K −1 within the range of 172 K–350 K and |TCR| > 2%·K −1 , spanning a large temperature range around 180 K, including room temperature. These results strongly indicate that the composite, such as Mn 3 O 4 - La 1- x Ca x MnO 3 , provides a new idea for uncooled bolometer/night vision. Graphical Abstract
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JOURNAL OF POROUS MATERIALS
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2024
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IF 2.5
Lu Shun,Xiao Chaohu,Tian Qi,Mu Xiaotong,Yu Jiale,Hasi Qimeige,Zhang Yuhan,Chen Lihua
Although photothermal materials (PMs) are widely utilized in pure water and seawater, there is less research on the design and preparation of multifunctional photothermal materials with organic dye adsorption and oil displacement properties. In this study, biomass carbon aerogel (BC) was prepared through a simple Ca 2+ cross-linking and freeze-drying process. To enhance the antifouling performance of BC, hydrophilic and oleophobic chemical modification was conducted to obtain BC-SP. The contact angle of n-hexadecane can reach to 141.8°, which enable the extensive application of BC-SP in oil-bearing wastewater treatment. Notably, BC-SP exhibited exceptional light absorption efficiency (approximately 95%), excellent heat insulation performance (thermal conductivity 0.0650 W m − 1 K − 1 ), and rapid water transport capability. Under the irradiation of 1 kW m − 2 , the solar energy conversion efficiency can reach to 86.8%. After tested eight cycles, the evaporation efficiency remained relatively stable and can adsorb most organic dyes in dye wastewater. Therefore, the study of BC-SP in this paper may has broad practical application prospects.
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Journal of Central South University
·
2024
·Vol. 31
·期 4
·1163-1177
·
IF 3.7
Liu Hong-yu,Lyu Hua-gang,Zhang Wen,Jiang Jun,Li Xiao-hong,Xue Sheng-guo
To improve the remediation and antioxygenic properties of ferrous sulfide (FeS) nanomaterials toward heavy metals is the focus of current research. This study employed a combination of sodium carboxymethylcellulose (CMC) and sodium dodecyl benzene sulfonate (SDBS) for the modification of FeS nanomaterials supported by porous silicon (SiO 2 /FeS) to serves as an efficient amendment for cadmium pollution. The optimized slurry with the mass ratio of CMC/SDBS to be 1:3 showed enhanced dispersion and antioxidant effects on SiO 2 /FeS (the mass ratio of surfactant to FeS was 1:1). This formulation exhibited the smallest particle size ( D 50 = 0.66 µm) and the highest absolute Zeta potential values exceeding 30 mV. Also, the obtained products demonstrated effective remediation of cadmium-contaminated solutions, with Cd(II) primarily forming stable CdS and CdSO 4 products through ion exchange and chemical precipitation. The adsorption capacity of SiO 2 /FeS-CMC/SDBS 1:3 for cadmium in air and nitrogen was remained during 30 d, reaching about 158 mg/g. Notably, under low concentration Cd contamination, the adsorption capacity of SiO 2 /FeS-CMC/SDBS 1:3 exceeded that of SiO 2 /FeS-CMC and SiO 2 /FeS-SDBS without acidification risk. In summary, this research highlights the improved remediation and antioxygenic properties achieved through CMC and SDBS co-modification of SiO 2 /FeS, providing a new amendment for Cd remediation.
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Stem Cell Research & Therapy
·
2024
·Vol. 15
·期 1
·1-15
·
IF 7.1
Wang Ping,Wang Min,Liu Lin,Li Hongyi,Liu Helin,Ren Jiangbo,Liu Tianhui,Cong Min,Zhu Zhijun,Zhao Xinyan,Sun Liying,Jia Jidong
Background Hepatic progenitor cells serve not only as the origin of combined hepatocellular cholangiocarcinoma (cHCC-CCA) but are also responsible for malignancy recurrence after surgical resection. Nucleophosmin 1 (NPM1) has been implicated in cancer metastasis and poor prognosis. This study aimed to determine the expression of NPM1 by hepatic progenitor cells in cHCC-CCA and the effects of targeting NPM1 on hepatic progenitor cells and BEL-7402 cells with characteristics of both progenitor cells and cHCC-CCA. Methods First, NPM1 was detected by RT‒PCR, western blotting, and double-immunofluorescence staining in cHCC-CCA tissues. NPM1 expression was subsequently analysed in rat hepatic progenitor cells cultured in vitro and in interleukin 6 (IL6)-treated cells. The effects and mechanism of NPM1 on hepatic progenitor cells were determined by knocking down NPM1 and performing RNA sequencing analysis. Finally, NSC348884, a small-molecule inhibitor that disrupts NPM1 dimer formation, was used to confirm the function of NPM1 in BEL-7402 cells. Results Both human hepatic progenitor cells in cHCC-CCA tissues and rat in vitro cultured hepatic progenitor cells highly expressed NPM1. IL6, a cytokine involved in the malignant transformation of hepatic progenitor cells, dose-dependently increased NPM1 and PCNA expression. Knocking down NPM1 reduced IL6R transcription ( P < 0.0001) and inhibited the proliferation ( P = 0.0065) of hepatic progenitor cells by suppressing the mTOR signalling pathway and activating the apoptosis pathway. Furthermore, knocking down NPM1 in hepatic progenitor cells resulted in more apoptotic cells (7.33 ± 0.09% vs. 3.76 ± 0.13%, P < 0.0001) but fewer apoptotic cells in the presence of NSC348884 (47.57 ± 0.49% vs. 63.40 ± 0.05%, P = 0.0008) than in the control cells, suggesting that low-NPM1-expressing cells are more resistant to NSC348884. In addition, NSC348884 induced the apoptosis of BEL-7402 cells with an IC50 of 2.77 μmol/L via the downregulation of the IL-6R and mTOR signalling pathways and inhibited the growth of BEL-7402 cells in a subcutaneous xenograft tumour model ( P = 0.0457). Conclusions Targeting NPM1 inhibits proliferation and induces apoptosis in hepatic progenitor cells and BEL-7402 cells, thus serving as a potential therapy for cHCC-CCA.
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Waste and Biomass Valorization
·
2025
·
IF 2.8
Zhu Xiaoxiao,Jiang Xuesong,Ding Juxuan,Mo Zhangchao,Wang Ling,Ban Boyuan,Chen Jian
The growing market demand for glass polishing leads to the production of a significant amount of waste known as rare earth polishing powder waste (REPPW), which poses environmental risks. This study is expected to achieve the waste treatment and comprehensive utilization of rare earth resources. A simple direct and low-cost gravity settling-hydrofluoric acid (HF) leaching process is proposed to regenerate rare earth polishing powder from the glass polishing waste. Firstly, dilute and stir the waste slurry evenly before letting it stand. The next gravity settling step removes most of the large impurity particles, and the acid-leaching process restores the aggregated polishing powder particles to their original size while removing the SiO 2 impurities to obtain the regenerated polishing powder. The optimal conditions for the HF leaching process are 0.25 M, 10 min, and 25 °C. The powder regenerated reaches a rare earth content of 95.3% and can be directly used for glass polishing. Particularly, ultra-precision surface roughness is achieved and the materials removal rate reaches 119.4% of the pristine polishing powder. The regeneration mechanism of the HF leaching process is proposed. The material flow and mass balance of the products obtained during the regenerating process indicate that the recycling of 1000 kg REPPW slurry yielded approximately 658 kg regenerated polishing powder, and it provides a total economic value of 2438.7 US dollars in the regenerating process.
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Food Analytical Methods
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2024
·
IF 2.6
Zhang Hongtao,Gao Jiahui,Tan Lian,Zheng Li,Wang Longjie
Milk powder is a common food in most families. It is of great significance to accurately detect the quality and safety of milk powder to mitigate food safety problems. This paper presents a method for the determination of vanillin and ethyl vanillin in milk powder based on terahertz (THz) spectroscopy. Samples with varying concentration gradients of these two additives were prepared, and a terahertz time-domain spectrometer was used to collect spectral data from the samples in the 0.2 to 1.5 THz range. Seven spectral preprocessing algorithms were evaluated using the partial least squares (PLS) method, and it was found that the combination of multivariate scattering correction (MSC) and Savitzky-Golay (SG) smoothing preprocessing yielded the best results, significantly improving the accuracy of the test sets for both additives. Subsequently, nine quantitative detection methods were constructed by combining three dimensionality reduction algorithms (ant colony algorithm (ACO), competitive adaptive reweighted sampling (CARS), and successive projection algorithm (SPA)) with three regression models (support vector regression (SVR), long short-term memory (LSTM), and particle swarm optimization-back propagation (PSO-BP)). The results showed that the LSTM regression model, with dimensionality reduction performed by the CARS algorithm, performed best for detecting vanillin in milk powder, achieving a recognition rate of 94.49%. Compared to the other eight methods, this increased the recognition rate by 7.69%. Similarly, the LSTM regression model, combined with the SPA algorithm for dimensionality reduction, performed best for detecting ethyl vanillin in milk powder, reaching a recognition rate of 98.37%. This represented a 6.59% increase in recognition rate over the other eight methods, providing a novel technical approach for non-destructive testing and analysis of milk powder quality and safety.
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Applied Water Science
·
2024
·Vol. 14
·期 9
·1-10
·
IF 5.7
Afzal Muhammad Zaheer,Khan Said Akbar,Song Chao,Irfan Muhammad Imran,Wang Shu-Guang
Growing concerns regarding the presence of pharmaceuticals in wastewater necessitate their removal. Membrane filtration offers a promising approach. This study explores the development of biochar incorporated mixed matrix membranes (MMMs) for ciprofloxacin removal from water. Biochar, derived from the pyrolysis of agricultural waste, was blended with polyether sulfone (PES) and polyvinylpyrrolidone in varying ratios. The resulting MMMs exhibited progressively improved properties with increasing biochar content. Notably, membrane M 11 , comprising equal parts PES and biochar, displayed the highest porosity, lowest surface roughness (12.0), and lowest contact angle (31.05°), indicating enhanced hydrophilicity (increased by 58.19% compared to the biochar-free membrane). M 11 effectively removed ciprofloxacin along with three additional antibiotics from different classes. Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses corroborated the removal of ciprofloxacin. Furthermore, M 11 demonstrated excellent regenerability, retaining over 57% removal efficiency after four cycles. These findings highlight the potential of M 11 as a sustainable and cost-effective membrane for pharmaceutical removal from wastewater.
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Nano-Micro Letters
·
2024
·Vol. 16
·期 1
·1-13
·
IF 31.6
Ren Shan,Cao Xi,Fan Qikui,Yang Zhimao,Wang Fei,Wang Xin,Bai Licheng,Yang Jian
Developing surface-functionalized catalysts with exceptional activity and selectivity for the electrocatalytic CO 2 RR to C 2+ products under neutral electrolyte.
A remarkable C 2+ FE of nearly 90% at an unprecedented current density of 300 mA cm −2 and maintain high FE (> 80%) at the wide current density performance (100–600 mA cm −2 ) in neutral environments using a flow cell as well as MEA electrolyzer.
Mechanical study reveals that reducing the coverage of coordinated K·H 2 O water increased the probability of intermediate reactants (CO) interacting with the surface, thereby promoting efficient C–C coupling and enhancing the yield of C 2+ products.
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CATALYSIS LETTERS
·
2024
·
IF 2.3
Xu Xian,Lan Ling,Xu Jiangong,Liang Zheng,Tan Jin,Wang Haiyong,Qiu Songbai
The development of biodegradable materials from biomass is a crucial strategy for leveraging biomass resources. A key component in this process is 2,5-bis(hydroxymethyl)furan (BHMF), a significant biomass-derived platform chemical. However, producing BHMF with high selectivity through the selective hydrogenation of 5-hydroxymethylfurfural, while avoiding the creation of unwanted byproducts, is a complex challenge. In our research, we have developed a novel catalyst featuring a magnetic core. This catalyst, which consists of platinum loaded onto a graphene-like shell, has been applied to the catalytic hydrogenation of HMF in an aqueous environment. Under the optimized conditions of 373 K, 3 MPa H 2 , and 1 h reaction time, a BHMF yield exceeding 99% was achieved. This method presents a promising and effective approach for the high-value conversion of biomass waste into polymer materials and pharmaceutical chemicals. Graphical Abstract
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危险品化学品经营许可证（带存储）