JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Lu Tian,Dazhong Zhong,Tao Zhao,Yi Liu,Lu Hao,Qiang Fang,Xuelei Lang,Xin Zhao,Genyan Hao,Guang Liu,Jinping Li,Qiang Zhao
Developing highly efficient OER catalysts is essential for producing hydrogen from water electrolysis to compensate for conventional fossil fuel shortages. Here, the oxygen-vacancy-rich heterostructure grown on the Ni foam (NF) (Co 3 O 4 @Fe-B-O/NF) is fabricated. The synergistic effect between Co 3 O 4 and Fe-B-O has been proven effectively modulate the electronic structure and produce highly active interface sites, ultimately leading to enhanced electrocatalytic activity. Co 3 O 4 @Fe-B-O/NF requires an overpotential of 237 mV to drive 20 mA cm −2 in 1 M KOH, and 384 mV to drive 10 mA cm −2 in 0.1 M PBS, superior to most catalysts currently used. Moreover, Co 3 O 4 @Fe-B-O/NF as an oxygen evolution reaction (OER) electrode shows great potential in overall water splitting and CO 2 reduction reaction (CO 2 RR). This work may provide effective ideas for designing efficient oxide catalysts.
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Ping Li,Pu Yang,Fei Liu,Wanxiong Xiao,Fei Yan,Tian Gan,Kun Zhao,Dong Fu
Solid oxide electrolysis cell (SOEC) is considered as a high energy-efficient CO 2 conversion method and a promising technology to achieve carbon neutralization. Thus, in this work, the reduced Co or Ni doped Pr 0.4 Sr 0.6 Fe 0.9 Mo 0.1 O 3 perovskite oxides are used as the cathode of SOEC. After reduction, Co-Fe alloy nanoparticles are in situ exsolved from Pr 0.4 Sr 0.6 Co 0.2 Fe 0.7 Mo 0.1 O 3 and Pr 0.4 Sr 0.6 Co 0.45 Fe 0.45 Mo 0.1 O 3 , and NiFe 10.8 alloy nanoparticles are attached on the Pr 0.4 Sr 0.6 Ni 0.2 Fe 0.7 Mo 0.1 O 3 matrix. The reduced Pr 0.4 Sr 0.6 Ni 0.2 Fe 0.7 Mo 0.1 O 3 exhibits the highest oxygen vacancy concentration and CO 2 adsorption ability, which further promote oxygen surface exchange and electrochemical surface exchange reaction. Besides, the reduced Pr 0.4 Sr 0.6 Ni 0.2 Fe 0.7 Mo 0.1 O 3 exhibits the highest surface reaction rate constant ( k chem ) of 3.54 × 10 -4 cm s -1 and highest oxygen chemical bulk diffusion coefficient ( D chem ) of 27.53 × 10 -5 cm 2 s -1 , suggesting that reduced Pr 0.4 Sr 0.6 Ni 0.2 Fe 0.7 Mo 0.1 O 3 shows the best catalytic activity for CO 2 reduction reaction. The symmetrical cell with reduced Pr 0.4 Sr 0.6 Ni 0.2 Fe 0.7 Mo 0.1 O 3 shows the lowest polarization resistance ( R p ) value, and at 800 °C, the electrolysis cell with reduced Pr 0.4 Sr 0.6 Ni 0.2 Fe 0.7 Mo 0.1 O 3 cathode also exhibits the best performance of 0.81 A cm -2 in 50%CO-50%CO 2 and 1.05 A cm -2 in pure CO 2 at 1.5 V, indicating that reduced Pr 0.4 Sr 0.6 Ni 0.2 Fe 0.7 Mo 0.1 O 3 is a promising cathode for CO 2 electrolysis.
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Frontiers in Pharmacology
·
2023
·
IF 5.6
Li Yingzi,Liu Xiaoyan,Li Ludi,Zhang Tao,Gao Yadong,Zeng Kewu,Wang Qi
Eupalinolide A (EA; Z-configuration) and eupalinolide B (EB; E-configuration) are bioactive cis-trans isomers isolated from Eupatorii Lindleyani Herba that exert anti-inflammatory and antitumor effects. Although one pharmacokinetic study found that the metabolic parameters of the isomers were different in rats, metabolic processes relevant to EA and EB remain largely unknown. Our preliminary findings revealed that EA and EB are rapidly hydrolyzed by carboxylesterase. Here, we investigated the metabolic stability and enzyme kinetics of carboxylesterase-mediated hydrolysis and cytochrome P450 (CYP)-mediated oxidation of EA and EB in human liver microsomes (HLMs). We also explored differences in the hydrolytic stability of EA and EB in human liver microsomes and rat liver microsomes (RLMs). Moreover, cytochrome P450 reaction phenotyping of the isomers was performed via in silico methods (i.e., using a quantitative structure-activity relationship model and molecular docking) and confirmed using human recombinant enzymes. The total normalized rate approach was considered to assess the relative contributions of five major cytochrome P450s to EA and EB metabolism. We found that EA and EB were eliminated rapidly, mainly by carboxylesterase-mediated hydrolysis, as compared with cytochrome P450-mediated oxidation. An inter-species difference was observed as well, with faster rates of EA and EB hydrolysis in rat liver microsomes. Furthermore, our findings confirmed EA and EB were metabolized by multiple cytochrome P450s, among which CYP3A4 played a particularly important role.
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FOOD CONTROL
·
2023
·
IF 6
Shiqi Hu,Xinglian Xu,Wangang Zhang,Chunbao Li,Guanghong Zhou
The activity of cathepsin B in Jinhua ham was affected by various processing parameters, which were investigated and quantified using a multi-layer artificial neural network (ANN). The key factors that influence ham quality are processing temperature, pH, and sodium chloride content. The study discussed the univariate analysis and multivariate interactions between two or three factors. The established ANN model was used for further investigation, and the actual enzyme activity of cathepsin B was characterized. The results showed that high temperature (greater than 60 °C) and an alkaline environment or the addition of Na + cation significantly reduced the enzyme activity ( p < 0.05). The optimal conditions for protease activity were found to be at 40 °C and pH 6.0. The enzyme was found to be unstable at a temperature of 20 °C or pH 6.5–7.0 in the presence of NaCl, indicating significant interactions between temperature, pH value and NaCl content ( p < 0.01). Furthermore, the ANN model showed good match between true and predicted values. The correlation coefficient was 0.98468, and the model provided supplementary information about the effect of NaCl on cathepsin B activity within 0.4M–0.6M. The findings could be useful in Jinhua ham production and the study of the structure-activity relationship of cathepsin B.
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MICROCHEMICAL JOURNAL
·
2023
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IF 4.8
Huizi Zheng,Haoming Sun,Zhipeng Zhang,Yudan Qian,Xiaolin Zhu,Jiao Qu
Microplastics have worldwide accumulated in water and coexisted with different toxic chemicals, which ultimately threaten human health. However, the combined cytotoxicity of microplastics and typical pollutants is still limited. Therefore, it is essential to evaluate the individual toxicity of microplastics and the combined toxicity with other contaminants rapidly and accurately. In this study, a sensitive electrochemical cell-based sensor based on a carbon nanohorn/rhodamine B modified electrode was proposed. Normal human liver (L-02) cells were used as the ideal model for toxicity evaluation. The sensor was used to detect the cytotoxicity of polystyrene microplastic (PS), bisphenol A (BPA), pentachlorophenol (PCP), and lead (Pb 2+ ). The half inhibition concentration (IC 50 ) values of PS, BPA, PCP, and Pb 2+ to L-02 cells were 286.34 μg/mL, 78.85 μM, 67.87 μM, and 60.12 μM, respectively. The combined toxicity of PS and typical pollutants (BPA, PCP, Pb 2+ ) revealed an additive effect. Moreover, the mechanism underlying the cytotoxicity of microplastics and three pollutants was investigated from the perspective of oxidative stress and cellular apoptosis. The toxic effects inhibited cell division and growth, with apparent oxidative stress damage and increased apoptosis. This study provideds a sensitive tool for toxicity detection of microplastics and typical pollutants, and reveals the possible mechanisms involved.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2023
·Vol. 37
·期 9
·e7211
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IF 3.9
Qian Xu,Xinyuan Guo,Chuantao Hou,Zonghua Wang
Synthesis of Ln-porphyrin aerogels with abundant porosity and novel photophysical properties for luminescent sensing and photocatalysis should have significant importance. In this paper, a multifunctional Tb-porphyrin aerogel was synthesized using agarose as a building block for ratiometric fluorescent Cu(II) sensing and photocatalytic degradation of rhodamine B. Specially, Tb-porphyrin particles were introduced into agarose aerogel to give the Tb-porphyrin aerogel with porous structure. Tb-porphyrin aerogel shows an excellent sensing performance toward Cu(II) resulting from the self-referencing mechanism and the porous structure. The fluorescent response exhibits a linear range from 1 to 200 μM ( R 2 = 0.990), and the limit of detection is 50 nM (S/N = 3). Such a ratiometric fluorescent sensor shows excellent long-term stability and selectivity. Furthermore, the Tb-porphyrin aerogel was used for photocatalytic degradation of rhodamine B, exhibiting a more efficient activity compared with the Tb-porphyrin particle. This research should open up a new avenue to develop Ln-porphyrin aerogel-based material for ratiometric fluorescent sensing and photocatalysis.
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Energies
·
2023
·Vol. 16
·期 14
·5432
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IF 3.2
Guohong Wang,Shunli Zhang,Zhuo Huang,Xin Cui,Zhengchang Song
The unique structure and physical properties of perovskite-type catalysts make them highly promising for catalyzing efficient coal combustion. Mesoporous perovskite LaNixFe1−xO3(x = 0.2, 0.4, 0.6, 0.8) coal combustion catalysts were synthesized using the sol–gel method. The effects of the doping amount of B-site doped nickel on both the crystal structure and catalytic performance were investigated. X-ray diffraction, scanning electron microscopy, and nitrogen adsorption–desorption tests were used to characterize the catalyst samples. Thermogravimetric analysis (TG) and activation energy (Ea) calculations were used to assess the catalyst’s activity for the catalytic combustion of anthracite coal (JF coal, originating from Shanxi, China). Results revealed that nickel doping created lattice distortion and Ni-Fe alloy interactions. The difference in nickel doping significantly affects the morphology and catalytic activity of perovskite. The addition of LaNi0.6Fe0.4O3(NI6) with a mass fraction of 5% resulted in the highest average burning rate value (va= 4.52%/min) of JF coal among all synthesized catalysts. The Eaof JF coal catalytic combustion, calculated using the Coats–Redfern method and the Doyle method, showed a good agreement with the TG curves. The LaNixFe1-xO3series catalysts were found to significantly decrease the Eaof JF coal combustion, with a maximum reduction of 42% compared to the case without any catalyst added. Among the synthesized catalysts, NI6 exhibited a favorable catalytic combustion performance and is thus a promising candidate for the clean and efficient utilization of coal resources.Keywords:B-site doping perovskite;composites;sol–gel chemistry;catalytic combustion
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 27
·21396-21408
·
IF 2.779
Wang Jiaxuan,Wu Daoxin,Wu Jialun,Duan Mengtian,Tong Haixia
A novel Bi 2 O 3 /Cs 3 PW 12 O 40 (Bi 2 O 3 /CsPW) composite was prepared by depositing Bi 2 O 3 on the surface of spherical Cs 3 PW 12 O 40 . The synthesized photocatalyst was characterized using XRD, XPS, FT-IR, BET, SEM, TEM, and UV–Vis. The results revealed that the composite was a typical Keggin-type photocatalyst. Compared with pure Bi 2 O 3 and CsPW, the composite exhibited high photocatalytic degradation activity for rhodamine B (RhB). The 10% Bi 2 O 3 /CsPW nanocomposite could decompose 92.7% of RhB under visible-light irradiation for 240 min. The improved photocatalytic degradation efficiency is mainly due to the enhanced absorption of visible-light and effective separation of photo-induced carriers caused by heterojunction formation. The active species capture tests confirmed that RhB photodegradation using Bi 2 O 3 /CsPW composite was mainly controlled by h + and·O 2− oxidation reactions. Furthermore, Bi 2 O 3 /CsPW composite displayed good stability under cyclic experiments.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Min Zhang,Yiguo Jiang,Xiuquan Xu,Xiaofeng Yu,Wenyan Shen,Miaomiao Luo,Luyao Ding,Haiwen Chen
The reinforced light-harvesting capability, suppressed photocarrier recombination and increased specific surface area represented a possibility of excellent photocatalytic performance for graphitic carbon nitride (g-C 3 N 4 )-based photocatalysts . Herein, the porous 1,3,5-Trihydroxybenzene substituted g-C 3 N 4 (denoted as PTBCN) composites with superior visible-light-driven photocatalytic properties were rationally constructed via a two-step reaction combination of freeze-drying and thermal-polymerization. The optimal PTBCN-2 achieved the maximum photocatalytic Rhodamine B (Rh B) degradation and H 2 O 2 evolution rate constants, nearly 6.56 and 3.17 times higher than that of bare g-C 3 N 4 . The outstanding performances of PTBCN-2 were probably attributed to the extended specific surface area, robust visible light response, adjusted electronic band structure , accelerated separation and transfer of photocarriers as well as good hydrophilicity. As a result, the above integrated merits were directly responsible for the huge superoxide anion ( • O 2 − ) generation, which dominated the efficient photocatalytic reactions. This work provided a new idea to design and construct high efficiency porous aromatic ring substituted g-C 3 N 4 -related photocatalysts for organic pollutants degradation and H 2 O 2 production.
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Bioengineering-Basel
·
2022
·Vol. 9
·期 7
·307
·
IF 5.046
Zhixian Huang,Fan Zhang,Yanbo Tang,Yongdi Wen,Zhenqiang Wu,Zhen Fang,Xiaofei Tian
Hypocrellins (HYPs) are natural perylene quinone derivatives from Ascomycota fungi. Based on the excellent photosensitization properties of HYPs, this work proposed a photocatalytic advanced oxidation process (PAOP) that uses HYPs to degrade rhodamine B (RhB) as a model organic pollutant. A synergistic activity of HYPs and H2O2(0.18 mM of HYPs, 0.33%w/vof H2O2) was suggested, resulting in a yield of 82.4% for RhB degradation after 60 min under visible light irradiation at 470–475 nm. The principle of pseudo-first-order kinetics was used to describe the decomposition reaction with a calculated constant (k) of 0.02899 min−1(R2= 0.983). Light-induced self-degradation of HYPs could be activated under alkaline (pH > 7) conditions, promising HYPs as an advanced property to alleviate the current dilemma of secondary pollution by synthetic photocatalysts in the remediation of emerging organic pollutants.Keywords:photocatalytic advanced oxidation;organic pollutants;photosensitizer;ring-opening reaction;self-degradation
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Journal of Physical Chemistry C
·
2022
·
IF 4.177
Kang Hu,Ping Liu,Ziqing Zhang,Ji Bian,Guowei Wang,Hongjun Wu,Hui Xu,Liqiang Jing
g-C3N4 is a promising photocatalyst for CO2 conversion owing to its outstanding reduction potential. However, its shallow valence band position and sluggish water oxidation reaction restrict the overall CO2 photoreduction process. Herein, g-C3N4 nanosheets are first doped with B through thermal treatment of mixed NaBH4 and subsequently modified with highly dispersed Ru-oxo clusters by using tailored chitosan oligomers. The optimal Ru-oxo modified B-doped g-C3N4 exhibits an exceptional photocatalytic CO2 conversion rate with 22-fold improvement compared with pristine CN. Based on the results of electron paramagnetic resonance, atmosphere-controlled surface photovoltage spectroscopy, in situ diffuse reflectance infrared Fourier transform spectroscopy, etc., it is confirmed that the improved photoactivities are attributed to the downward shift of the valence band to obtain the strong driving force for water oxidation along with extension of the visible light response region by B doping and to the capture of photogenerated holes to enhance charge separation and then to accelerate the water oxidation process from the modified Ru-oxo clusters.
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zhongli Liu,Haizeng Wang,Jizhou Duan,Baorong Hou
Bi 2 WO 6 /AgIO 3 (BWO/AIO) nanosheet composites were constructed by a two-step hydrothermal method . The structure, morphology and photoelectrochemical properties of the composites were characterized by X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectra (UV-DRS), transmission electron microscopy (TEM), impedance, X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The constructed photocatalyst composites exhibited the best photocatalytic performance at a molar ratio of BWO/AIO-0.8. In addition, there was complete degradation of RhB by the BWO/AIO-0.8 in 180 min under illumination, and the bactericidal rates were 99.10%, 97.32% and 96.3% for P. aeruginosa , S. aureus and E. coli, respectively, in 60 min. Based on the energy band structure of the semiconductor and radical trapping experiments, the S-scheme heterojunction was associated with the enhanced photocatalytic properties.
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