Catalysis Science & Technology
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2024
·Vol. 14
·期 5
·1167-1180
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IF 4.4
Jiahui Xu,Xianlang Chen,Jia-qi Bai,Zhengan Miao,Yuan Tan,Nannan Zhan,Huangfei Liu,Mei Ma,Mengdie Cai,Qin Cheng,Song Sun
The selective hydrogenation of halonitrobenzenes (HNBs) to haloanilines (HANs) is an efficient method to prepare key intermediates in the fine chemical industry. It is still a challenge to develop non-noble metal-based heterogeneous hydrogenation catalysts to achieve high activity and selectivity for this reaction. Herein, we reported a N, S co-doped mesoporous carbon supported Co catalyst for hydrogenation of HNBs, the prepared 5%Co/NSPC-800 catalyst showed superior catalytic performance with a TOFs of 203 h−1 and >99.9% selectivity to p-chloroaniline (p-CAN), and it also exhibited wide substrate applicability and can be reused at least 4 times. Furthermore, the reaction mechanism of p-CNB hydrogenation over 5%Co/NSPC-800 was proposed on the basis of kinetic studies, spectroscopic studies, and DFT calculations. The hydrogenation of p-CNB over 5%Co/NSPC-800 followed the condensation route, and Co0 and Co–Nx were the main active sites for this reaction.
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ANALYTICAL CHEMISTRY
·
2024
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IF 6.7
Jiancong Ni,Shengxiu Huang,Weiqiang Yang,Qiaoling Chen,Zhenyu Lin
Glycolysis, a pivotal step in yeast metabolism, plays an indispensable role as a carbohydrate utilization process crucial for cellular survival. Developing advanced technologies to elucidate this fundamental physiological process holds significant scientific implications. Electrochemiluminescence (ECL) imaging exhibits the advantage of negligible background interference and facilitates straightforward visualization, thereby conferring significant value in biomolecular observation. In this study, we present an ECL imaging method for investigating yeast metabolism by utilizing the endogenetic NADH as an efficient coreactant for ECL generation. The yeast glycolysis process drives the conversion of NAD+ to NADH, resulting in enhanced ECL response as well as the increased brightness of ECL images that can be used for quantification of yeast activity. There was a linear correlation between the reciprocal of both the gray value of ECL image and yeast concentration within the range of 6.25 × 106 – 6.25 × 108 CFU/mL. Due to the highly efficient coreactant behavior of NADH, our method demonstrated excellent selectivity with minimal interference. Furthermore, we employed this approach to investigate some toxic inhibitors on yeast metabolism, yielding reliable results. This ECL imaging method not only avoids the use of additional coreactants but also provides a sensitive and intuitive approach for monitoring yeast metabolism, demonstrating great potential in revealing various complex biological processes.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Huijuan Liu,Yonglei Xing,Jingyao Duan,Xiaoyong Jin,Gang Ni
This research designed a copper and nitrogen co-doped porous carbon nanosheets (Cu–N/C) and systematically explored its efficient application in peroxymonosulfate (PMS) activation. The Cu–N/C catalyst, prepared using a multi-step anchoring strategy, exhibited remarkable catalytic activity, benefiting from its large specific surface area and uniformly distributed Cu–N coordination structure. This structure notably improved PMS activation, enabling the effective breakdown of organic pollutants like phenol. Experimental results demonstrated that 0.5 mmol of Cu–N/C catalyst achieved complete phenol removal in the PMS system, maintaining strong catalytic performance over a broad pH range. Through radical quenching experiments and EPR analysis, superoxide radicals were predominant in the reaction, while non-radical mechanisms, such as high-valence copper species and direct electron transfer, contributed to pollutant degradation. Additionally, pyrrolic nitrogen sites and surface hydroxyl groups were identified as key active sites, effectively adsorbing and activating PMS. The introduction of copper-induced defects further enhanced PMS activation, while pyrrolic nitrogen sites adsorbed pollutants, improving phenol degradation efficiency. Three-dimensional fluorescence spectroscopy and gas chromatography-mass spectrometry analysis identified hydroquinone, catechol, resorcinol, and p-benzoquinone as intermediate products during phenol degradation. The catalytic performance was restored through thermal treatment. This research provides new insights and theoretical support for PMS activation and organic pollutant degradation.
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Lulu Zhao,Huilin Hou,Shuo Wang,Lin Wang,Yang Yang,Chris R. Bowen,Jinguo Wang,Ziyi Liao,Dongjiang Yang,Ruifang Yan,Weiyou Yang
Despite the development of a range of photocatalysts for CO 2 reduction, the practical applications are significantly limited by low conversion efficiencies and their reliance on sacrificial agents, which are rooted in thermodynamic and kinetic challenges related to CO 2 conversion. Here, the engineering of Co single atoms in ultrathin single-crystal BiOCl nanosheets for boosted photocatalytic CO 2 reduction is reported. The engineering of Co atoms modulates the distribution of photogenerated charges at the catalyst surface, controlling key surface reaction dynamics and suppressing surface electron-hole recombination. This modulation also improves light absorption and enhances CO 2 adsorption and activation, leading to more efficient surface reactions. Notably, CO 2 is stably adsorbed onto the (001) face of BiOCl through a Bi-O-C(= O)-Co-O coordination unit, which lowers the activation energy for CO 2 reduction and reduces the formation energy of COOH − intermediates. As a result, the BiOCl photocatalysts achieve a CO formation rate of 183.9 µmol g −1 h −1 , when irradiated with a 300 W Xe lamp without cocatalysts or sacrificial agents. It represents an ≈13-fold increase compared to that of pristine BiOCl, and surpasses most reported Bi-based photocatalysts to date. Current work provides valuable insights into engineering of single atoms for developing advanced CO 2 -reduction photocatalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Zhengyan Hao,Yong Xu,Xijia Yang,Xuesong Li,Yang Gao,Liying Wang,Wei Lü
Zinc-ion hybrid supercapacitors (ZIHSCs) are emerging as a promising energy storage device, combining the benefits of traditional batteries and capacitors, including high energy density, incredible power density, a wide voltage window, and excellent capacity retention. In this study, a Cu²⁺ and Zn²⁺ co-doped needle-like tunnel-structured α-MnO₂ material is proposed as the cathode (Cu-Zn-MnO₂@CC), which is grown on an acid-treated flexible carbon cloth substrate using a simple hydrothermal synthesis method. Along with an anode made of super-mesoporous activated carbon derived from waste rice husks (ACrh@CC). The synergistic effect of the co-doping stabilizes the nanowire tunnel structure and provides more active sites. As a result, the Cu-Zn-MnO₂@CC//2 M ZnSO₄//ACrh@CC ZIHSC achieves an ultrahigh specific capacitance of 1241.85 mF cm⁻² at 1 mA cm⁻², representing an improvement of more than 50 % in performance compared to with conventional MnO₂@CC ZIHSC. And a maximum areal energy density of 689.9 μWh cm⁻² at a power density of 1 mW cm⁻². After 20,000 cycles, it retains 86.35 % of its initial capacitance. Furthermore, the assembled flexible device achieves a specific capacitance of 1070.21 mF cm⁻² at 1 mA cm⁻². This device can provide long-term power for electronic devices such as digital watches and timers. The study offers crucial understanding regarding structure of ZIHSC electrode materials and opens up possibilities for their potential applications.
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POLYMER INTERNATIONAL
·
2024
·
IF 2.9
Guoqiang Wang,Xiang Chi
Poly[(3-hydroxybutyrate)- co -(4-hydroxybutyrate)] (P34HB), poly[(butylene succinate)- co -(butylene furandicarboxylate)] (PBSF) and poly(vinyl acetate) (PVAc) were melt-blended to prepare P34HB/PBSF/PVAc blends with improved ductility. The thermal properties, mechanical properties, rheological properties and morphology of the blends were systematically studied. The addition of PBSF promoted the melt crystallization of P34HB. The temperatures at 5% weight loss of the blends were higher than that of P34HB. The surface of the blends was investigated using scanning electron microscopy. The surface of P34HB was very smooth, but the surfaces of the blends were rough. PVAc can increase the compatibility between P34HB and PBSF. Compared with P34HB, the elongation at break of the blends was increased to 219.1%. © 2024 Society of Industrial Chemistry.
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CHEMICO-BIOLOGICAL INTERACTIONS
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2024
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IF 4.7
Xiao-yu Xu,Zhe-yan Zhang,Xiao-dan Zhang,Jian-chao Luo,Yun-shan Zhong,Le-hao Jin,Da-peng Dai,Jian-chang Qian
To study the effects of metabolic enzyme activity inhibition and genetic polymorphisms on the pharmacokinetics and pharmacodynamics of rivaroxaban, we established an in vitro enzymatic reaction system to screen for inhibitors, and used the UPLC-MS/MS method to detect the levels of rivaroxaban and its metabolite M2-1. Additionally, in vivo pharmacokinetic-pharmacodynamic studies were conducted using Sprague-Dawley rats. Human recombinant CYP2J2 baculosomes were prepared using a baculovirus-insect expression system to investigate the impact of genetic polymorphisms on rivaroxaban metabolism through enzyme kinetics methods. The results demonstrated that acid-suppressing drugs strongly inhibited the metabolism of rivaroxaban in vitro . Among them, vonoprazan significantly increased the systemic exposure of rivaroxaban in vivo , while also prolonging prothrombin time, likely due to the competitive binding of vonoprazan and rivaroxaban to CYP2J2. Moreover, the genetic polymorphisms of CYP2J2 determined the metabolic characteristics of rivaroxaban and the inhibitory potency of vonoprazan. Overall, our findings suggest that vonoprazan-induced inhibition of CYP2J2 activity can affect the pharmacokinetics and pharmacodynamics of rivaroxaban, with the extent of inhibition determined by the genetic polymorphism of CYP2J2. These insights have important implications for the precise management of rivaroxaban in humans.
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MATERIALS RESEARCH BULLETIN
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2024
·
IF 5.3
Ronghui Cai,Jianhong Wu,Chunli Guo,Bining Tian
All inorganic double perovskites have been adopted as photo-luminescent hosts due to their high stability, absorption coefficient and carrier mobility. Various photo-luminescent properties are being investigated in double perovskites including infrared emitting, upconverting, afterglowing, temperature sensing and so on. Taking advantage of the Boltzmann distributed energy levels, erbium ions are gifted as spectral temperature sensing centers. Here, we synthesized Er 3+ doped monoclinic Ba 2 SrWO 6 (BSWO) double perovskites and carried out a series of examinations for their upconverting as well as temperature sensing characteristics. Upon 980 and 1550 nm excitation, the upconversion processes are determined by the relationship between emission intensities against excitation powers. The optical temperature sensitivities are evaluated by exploiting fluorescence intensity ratio (FIR) and lifetime, where the maximum values for FIR and lifetime sensitivities are 14.3 × 10 −3 and 2.2 × 10 −3 K −1 respectively, suggesting that Er 3+ doped double perovskites hold great potential for the development of novel optical temperature sensing materials.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Yi Gao,Tingting Chu,Chengyu Zhou,Wensheng Huang,Yin Zheng
In this paper, iron–copper bimetallic nanosheet materials (FeCu/CNS) were prepared using hydrothermal and pyrolysis methods to develop a dual-mode electrochemical and colorimetric sensing platform for detecting acetaminophen (ACM). The glassy carbon electrode (GCE) was modified with FeCu/CNS to enhance its electrocatalytic activity and develop an electrochemical sensor for detecting ACM. The linear range of the sensor was 0.01–7 × 10–6 mol/L, and the detection limit (LOD) was 2.5 × 10–8 mol/L. In addition, FeCu/CNS possesses an efficient peroxidase-like activity that converts colorless 3,3′,5,5′-tetramethylbenzidine (TMB) into a blue oxidized state product (oxTMB) in the presence of H2O2, which exhibits a characteristic absorption peak around 652 nm. However, ACM has reducing properties and can reduce oxTMB to TMB, thereby reducing the intensity of the characteristic absorption peak of oxTMB. Based on this principle, a colorimetric sensor was constructed for the detection of ACM, which had a linear range of 0.5–1625 × 10–6 mol/L and an LOD of 2.63 × 10–6 mol/L. Compared with other single methods, the method exhibited a wider linear range and lower detection limit, confirming the complementary and superior nature of the dual-mode sensor designed in this paper for ACM detection. Meanwhile, the detection of ACM in human serum was also carried out with satisfactory results.
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SCRIPTA MATERIALIA
·
2024
·
IF 5.3
Mengyun Jia,Dingliang Liang,Qing Du,Hui Wang,Yuan Wu,Suihe Jiang,Xiaobin Zhang,Haihui Ruan,Xiongjun Liu,Zhaoping Lu
Magnetothermal therapy (MT) is a noninvasive cancer treatment that has shown great promise in recent years. However, the low magnetothermal efficiency of the existing magnetic nanoparticles used in MT has been an obstacle to their widespread applications. In this work, we report a new class of Fe-Co-Ni-Cu high-entropy magnetic nanoparticles (HEMNPs) with exceptional magnetothermal properties synthesized by a thermal decomposition method. The fabricated HEMNPs, having an average diameter of 60–70 nm, exhibited a saturation magnetization of 42.4 emu/g and coercivity of 129.5 Oe. The hyperthermia measurement reveals that the HEMNPs have a maximum specific loss power of 202 W/g at the concentration of 2 mg/ml under an alternating magnetic field with an intensity of 46 Oe and a frequency of 266 kHz, demonstrating the great potential for MT applications. Our results demonstrate that the high-entropy concept can be extended to develop high-performance magnetic nanoparticles for MT applications.
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JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Lei Shi,Wenyue Zhao,Zhao Wang,Wenjing Hua,Xiaoxia Yang,Xinyu Cao,Weidong Fei,Yu Zhao
The novel photovoltaic effect mechanism has been consistently corroborated over the last decade, however, the low photocurrent density remains a significant impediment to its practical applications. In this study, an extra-large photocurrent density is achieved in the acceptor (A 2+ , A = Ca, Sr, Ba)-donor (W 6+ ) co-doped BiVO 4 (BVO) films prepared with a sol-gel method. A photocurrent density of 4.05 mA/cm 2 under 450 nm light illumination and a large detection rate of 8.4 × 10 11 Jones and 5.4 × 10 11 Jones for 365 nm and 450 nm are respectively obtained. The high photoelectric conversion efficiency (PCE) of 2.4 % is obtained in the Au/BVO/Pt sandwich structure under 365 nm (10 mW/cm 2 ) light illumination using Sr 2+ -W 6+ co-doped film, even if the light is obstructed by Au top electrode. A possible mechanism based on uneven composition formed by acceptor-donor ions is proposed to explain the enhancement of the photovoltaic effect in A 2+ -W 6+ co-doped BVO films. The composite ion doping engineering presents a novel strategy for improving the photoelectric conversion efficiency in single-layer films.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Peng Tang,Xueying Zhao,Jiawei Du,Mang Li,Haining Qian,Huiqi Ren,Xuyang Zhang,Guohua Wu,Xiangwei Wang
In this study, hollow Co@SiO 2 @PPy composites with excellent electromagnetic wave (EMW) absorption performance were successfully synthesized. The monodisperse hollow Co microspheres were prepared using a solvent-thermal method. The microspheres were then coated with an SiO 2 layer by a modified Stöber method. Finally, the SiO 2 layer was surface-coated by polypyrrole (PPy) through in-situ polymerization to obtain Co@SiO 2 @PPy composite materials with hollow core–shell structures. The prepared CSP2 composite achieved a minimum reflection loss (RL min ) of −65.83 dB at 1.86 mm, demonstrating an effective absorption bandwidth (EAB) of 4.84 GHz. The CSP3 composite achieved a widest EAB (EAB max ) of 5.4 GHz at a thickness of 1.83 mm, while simultaneously maintaining the RL level at −50.70 dB. Additionally, it demonstrated an RL min value of −61.66 dB with a thickness as thin as 1.66 mm. The observed shift of FTIR absorption peaks by 20 cm −1 in the PPy ring provides compelling evidence for the involvement of multilayered structures in polarization loss. The SiO 2 layer not only enhances the interface polarization but also prevents corrosion of the Co core by acidic solutions. The exceptional EMW absorption characteristics can be attributed to the effective impedance matching and the combined effect of magnetic and dielectric losses.
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