Molecular Catalysis
·
2024
·
IF 3.9
Yinan Ren,Wei Li
Solar-driven CO 2 reduction into hydrocarbon fuels has a great potential for mitigating the issues of greenhouse effect and fossil energy crisis we are currently facing. It is a great challenge for visible-light-driven photocatalytic CO 2 reduction into CH 4 with high selectivity and conversion efficiency. Herein, we report a synthesis of N/K-doped TiO 2 nanospheres with Ag nanoparticles decoration (N/K-TiO 2 -Ag) by a solvothermal method and study its photocatalytic CO 2 reduction performance. It is found that the N/K-TiO 2 -Ag composite exhibits superior photocatalytic CO 2 reduction into CH 4 yield and selectivity than K-TiO 2 and N/K-TiO 2 . Indeed, the N/K-TiO 2 -Ag-0.5 sample shows the highest CH 4 yield with rate of 113.84 μmol g −1 h −1 and selectivity of CH 4 (93.71%) under light irradiation. The enhancement might be attributed to the synergy of N/K doping and silver loading. In particular, the N/K doping and the Ag cocatalysts introducing triggered improvement of solar energy utilization and charge separation as well as Ag-induced SPR effect and the K + -induced redistribution of photogenerated charge carriers cooperatively promotes photocatalytic CO 2 conversion into CH 4 . It is expected this work would offer a guide for rational design of K/TiO 2 -based photocatalyst for selectively converting CO 2 into fuels.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2024
·Vol. 130
·期 4
·1-10
·
IF 2.5
Song Wenqiang,Zhao Fengjiao,Xu Changyuan,Wang Qun,Yin Hongming
For photoluminescence (PL) properties of Mn 2+ in glass–ceramics are highly dependent on the concentration of Mn 2+ , we experimentally observed the change of Mn 2+ structures from isolated Mn 2+ ion as a tetrahedron, octahedron to Mn 2+ -Mn 2+ dimer in B-P-Zn-K based glass–ceramics with characteristic PL peaks locating at 504 nm, 600 nm, and 660 nm, respectively. Spectral results reveal that condensed Mn 2+ would lead to redshift of PL emission and reduced Luminous intensity caused by concentration quenching, however, with increasing Mn 2+ content, shift of Mn 2+ structure is the determining factor for PL redshift. Moreover, compared with tetrahedral and octahedral Mn 2+ , Mn 2+ -Mn 2+ dimer exhibits highly enhanced PL emission and shortened life span which reveal that transitions of Mn 2+ -Mn 2+ dimer are far more efficient than those transitions in tetrahedral and octahedral Mn 2+ . This enables tuning of color and efficiency of PL emission for Mn-doped glass–ceramics via a simple method. Graphical abstract
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Dan Zhao,Dong Chen,Yuhong Ma,Wantai Yang
Bismaleimide and biobased copolymer microspheres (BMPL) of bis[4-(4-maleimidoyloxy)phenyl]propane (BMIP) and limonene (LIM) with different compositions are synthesized via self-stabilizing precipitation copolymerization and applied as reactive modifiers of 2,2-bis(4-cyanatophenyl) propane (BADCy) resin. Due to the different reactivities of exo- and endocyclic vinyl groups in the LIM monomer, the content of the vinyl groups in the BMPL can be simply tuned by copolymerization temperature. There are some endocyclic double bonds of LIM in BMPL prepared at 75 °C but no observable endocyclic double bonds in BMPL prepared at 130 °C. The presence of LIM endocyclic double bonds in BMPL microspheres can effectively reduce the curing temperature of BADCy resin via the formation of chemical bonds between the BADCy matrix and BMPL microspheres but without expensing the heat resistance of the composites. The dielectric constant (ε) and dielectric loss (tan δ) of the BMPL/BADCy composite with the addition of 10 wt % of BMPL are 2.67 and 0.0034, respectively, at 106 Hz, which was much lower than those of pure BADCy (2.87, 0.0054). In addition, the maximum impact strength of the BMPL/BADCy composite at 10 wt % BMPL loading is 18.21 kJ/m2, which is 88.3% higher than that of pure BADCy. The BMPL/BADCy composite demonstrates low-k dielectric properties, high toughness, and thermal stability and has potential in the fields of electronic communication, aerospace, and aviation.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Wenyu Li,Kexin Ren,Hongyu He,Zhao Lei,Yuhang Chen,Maogang He,Ying Zhang
Cyclopentane is an excellent working fluid in high-temperature organic Rankine cycle (ORC) systems. Currently, experimental measurements of the speed of sound in cyclopentane at temperatures above 353 K are not available in the literature. In this study, the speed of sound in cyclopentane is measured by the Rayleigh–Brillouin scattering method. Using the existing experimental equipment, the data are measured along six isobaric lines from 2.0 to 10.0 MPa at a temperature range of 349.40 to 525.97 K. The expanded relative uncertainty of the speed of sound measured in this experiment can be estimated to be 0.86% with the confidence level of 0.95 (coverage factor k = 2). The average absolute relative deviation (AARD) between our experimental data and calculated values with the equation of state (EOS) proposed as mentioned in this paper in the liquid-phase region is 0.99%, which confirms the effectiveness of the experimental results and the accuracy of the EOS. Furthermore, the data on the speed of sound from experimental results and the literature for cyclopentane are also fitted into a correlation formula related to the temperature and pressure, facilitating engineering applications.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Weixia Zhi,Xinjie Guo,Yichu Nie,Lu Nie,Tingting He,Li Dai,Jing Xu,Xiangxin Zong,Jun Xu,Huaihong Cai,Yong Tang,Yanguang Cong,Jiang Pi,Youfeng Zhu,Pinghua Sun,Jialiang Guo,Huoqiang Chen,Xueqin Huang,Haibo Zhou
The current lack of rapid screening methods for Klebsiella pneumonia ( K. pneumonia ) poses a considerable threat to human health. Herein, we fabricated a multilayer Au@Au@Ag/Pt nanoparticle (NP) that made of the peroxidase-mimicking external shell and tunable plasmonic intra-nanogap as a versatile probe, and conjugated them with lateral flow immunoassay (LFIA) for colorimetric-catalytic-SERS (CM/CL/SERS) multi-model sensing K. pneumonia in complex biological matrix. After the optimization of several parameters, the limit of detection (LOD) of the target K. pneumonia were 10 3 CFU/mL for CL-LFIA and 38 CFU/mL for SERS-LFIA, both of which were over 10-fold and 200-fold more sensitive than the visual CM-LFIA (10 4 CFU/mL), respectively. The clinical validation of this multi-model LFIA was performed with the infected patients ( N = 6) and healthy subjects ( N = 3), among which 4 positive samples missed by conventional CM-LFIA were successfully identified by SERS-LFIA. More importantly, this LFIA has great specificity for the target bacteria, while showed no signal response to samples infected by other bacteria. Different from previous studies focusing on detection of protein and nucleic acid of K. pneumonia , our study shortened the sample-to-answer time with direct detection of K. pneumonia by LFIA, filling the diagnostic gap for point-of-care testing (POCT) of K. pneumonia infection. Overall, the great performance of our established LFIA suggested its substantial potential for diagnosis of K. pneumonia -induced nosocomial infection.
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Small
·
2025
·
IF 12.1
Mingyang Zhong,Tevin Li,Shouyi Yuan,Junwei Lucas Bao,Yonggang Wang
Small Quinone-based Organic Electrodes have received extensive attention. However, the rapid dissolution of small quinone electrode into electrolyte impede their practical applications. For example, Anthraquinone (AQ) and Phenanthrenequinone (PQ) molecules have been rarely reported for aqueous batteries due to the inferior electrochemical performance. Herein, a high-concentration hybrid electrolyte containing 1m Zn(OTF) 2 and 15m KOTF salts is introduced for small quinone electrode and investigate the redox behavior of PQ and AQ electrode is investigated in Zn 2+ /K + hybrid electrolyte. These findings reveal that AQ with carbonyl groups at para-position selectively stores proton rather than K + , while PQ with carbonyl group at ortho-position simultaneously stores proton and K + without selectivity. Moreover, the Zn(OTF) 2 salt serves as both proton buffer and binder to improve the cycle stability. Consequently, when PQ is paired with Zn metal anode for Zn || PQ batteries, the addition of potassium salt can improve the energy density of the Zn batteries. Moreover, when PQ is paired with Prussian blue cathode to assemble aqueous K-ion batteries, the addition of zinc salt in the electrolyte can improve the cycle stability via binding discharged PQ molecules with divalent-ions. This research provides an electrolyte engineering strategy to address the challenges facing PQ electrode for aqueous batteries.
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PubMed
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Tianxu Su,Bin Guan,Chunzheng Zheng,Jiefei Zhou,Zhen Huang
Developing low-temperature, high-efficiency ammonia decomposition catalysts for hydrogen production is essential for the broad application of hydrogen. This study conducted a systematic investigation of Ru/MgO catalysts modified with different alkali metals (Na, K, Cs), unveiling the impact of these modifications on catalyst performance and developing a highly efficient low-temperature ammonia decomposition catalyst. The addition of all alkali metals enhances the catalytic performance of Ru/MgO for ammonia decomposition, especially the addition of K, which results in the optimal enhancement of the catalyst, achieving a 75% ammonia decomposition efficiency at 350 °C (GHSV= 2,000 mL/h·gcat), more than doubling the performance of the unmodified Ru/MgO catalyst. The study revealed that the addition of potassium (K) altered the rate-determining step of the ammonia decomposition reaction from nitrogen recombination to the dissociation of the first hydrogen atom, and reduced the overall energy barrier required for the reaction. This facilitated the desorption of nitrogen from the Ru surface and the conversion of NH3, thereby accelerating the rate of the ammonia decomposition reaction.
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高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 15
·2211311
·
IF 29.4
Dawei Sha,Yurong You,Rongxiang Hu,Xin Cao,Yicheng Wei,Heng Zhang,Long Pan,ZhengMing Sun
Anion vacancy engineering (AVE) is widely used to improve the Li-ion and Na-ion storage of conversion-type anode materials. However, AVE is still an emerging strategy in K-ion batteries, which are promising for large-scale energy storage. In addition, the role of anion vacancies on ion storage is far from clear, despite several proposed explanations. Herein, by employing VSe 2 as a model conversion-type anode material, Se vacancies are intentionally introduced (labeled as P-VSe 2− x ) to investigate their effect on K + storage. The P-VSe 2− x shows excellent cyclability in half cells (143 mA h g −1 at 3.0 A g −1 after 1000 cycles) and high energy density in coin-type full cells (206.8 Wh kg −1 ). By applying various electrochemical techniques, the effects of Se vacancies on the redox potentials of K-ion insertion/extraction and the K-ion diffusion in electrodes upon cycling are uncovered. In addition, the structural evolution of Se vacancies during potassiation/de-potassiation using various operando and ex characterizations is revealed. Moreover, it is demonstrated that Se vacancies can facilitate the breaking of V Se bonds upon the P-VSe 2− x conversion using theoretical calculations. This work comprehensively explains the role of anion vacancies in ion storage for developing high-performance conversion-type anode materials.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2020
·
IF 3.232
Lijuan Huang,Longyan Xiang,Yan Zhang,Yongan Wang,Zhiyong Nie
The simultaneous detection of K + and Tl + can serve as a toxicological diagnostic tool for thallium poisoning. Colorimetric-reaction-based nanoprobes have emerged as promising sensors for the rapid and ultrasensitive detection of molecular species in simple systems. However, the development of viable screening tools for multicomponent analysis in complex systems remains challenging owing to interference from coexisting materials in the media. Herein, a simple chemical sensor array based on the peroxidase-like activity of gold nanoparticles modified with single-stranded DNA (AuNPs-ssDNA) and chemometrics was developed for the simultaneous detection of K + and Tl + in aqueous solutions and serum. The use of a K + adapter conferred high selectivity to the developed method. Optimized AuNPs-ssDNAs were used to construct a sensor array, which together with chemometrics provided fingerprints that can facilitate the simultaneous analysis of multiple components. The developed colorimetric reaction in combination with the chemometrics assay was directly used as a biosensor array, which exhibited detection limits of 107.33 nM for K + and 19.26 nM for Tl + . The developed method could potentially serve as a diagnostic technique for investigating thallium poisoning and toxicology.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Renjie Xu,Li Shen,Jie Xu,Xiang’an Lu,Xin Song
The equilibrium solubility of palmatine chloride in various mixed solvents consisting of ethanol (ethylene glycol (EG), isopropyl alcohol, and propylene glycol (PG)) plus water was experimentally obtained by static technology with environment conditions (283.15–328.15 K, 101.1 kPa). The measured data of palmatine chloride had a proportional relationship with temperature under the condition of fixed solvent composition, the same as increasing with the increasing the cosolvents of ethanol and EG except for the isopropyl alcohol and PG in four binary systems. The maximum solubility (0.01339 in mole fraction at 328.15 K) of palmatine chloride was obtained in neat ethanol. Under the same solvent composition and regular temperature, palmatine chloride was most soluble in a mixture of ethanol + water among all binary systems. X-ray powder diffraction and differential scanning calorimetry were employed to analyze palmatine chloride, which showed no significant change in the crystals before and after recrystallization. Three cosolvency models, the Jouyban–Acree model, van’t Hoff–Jouyban–Acree model, and Apelblat–Jouyban–Acree model were employed to correlate the measured data. In all calculation results, the largest RAD and RMSD were 1.80 × 10–2 and 6.80 × 10–5.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2021
·
IF 2.694
Li Wang,Danning Li,Lingyu Wang,Hongxun Hao,Lina Zhou
In this research, the gravimetric method was utilized to measure the solubility of phenacetin from 283.15 to 323.15 K under atmospheric pressure in 12 solvents, including methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, ethyl formate, ethyl acetate, n-propyl acetate, N,N-dimethylacetamide, N,N-dimethylformamide, and acetonitrile. The solubility curves present an increasing trend with increasing temperature, and the mixing thermodynamic properties are also investigated in detail. Moreover, three thermodynamic models were used to correlate the experimental solubility data, and the fitting effect looks satisfactory as the average relative density is below 5%. The modified Apelblat model has the highest agreement with the experimental data compared with other models (λh model and NRTL model).
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Ying Zhang,Taotao Zhan,Junshuai Chen,Xin Li,Qi Zhou,Maogang He
The experimental speeds of sound for the binary system of ethanol (1) + n-heptane (2) with the mole fractions of ethanol being (0.100, 0.300, 0.500, 0.700, and 0.900) were measured by Rayleigh-Brillouin light scattering spectroscopy at temperatures from 293.35 to 433.89 K along three isobaric lines from 0.1 to 5.0 MPa. The expanded relative uncertainty for the reported speed of sound is estimated to be 1.6% with the level of confidence of 0.95 (coverage factor k = 2). The experimental data were correlated as a function of temperature and pressure, yielding absolute average percentage deviations of 0.34, 0.20, 0.38, 0.28, and 0.29% for the mole fractions of ethanol being 0.100, 0.300, 0.500, 0.700, and 0.900, respectively. Within the temperature limits of 298.15–318.15 K, the derived thermo-acoustic properties for the binary system of ethanol (1) + n-heptane (2), including the density, the specific isobaric heat capacity, the isentropic compressibility, the isobaric thermal expansivity, the isothermal compressibility, the specific heat ratio, the internal pressure and the free volume at pressures up to 5.0 MPa, and the intermolecular free length under atmospheric pressure were calculated and analyzed.
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