LANGMUIR
·
2024
·
IF 3.7
Yujie Huang,Binyao Liu,Yiwen Yang,Hao Xiao,Tao Han,Hanmei Jiang,Jiahe Li,Yong Zhou,Gaili Ke,Huichao He
Water oxidation is an endothermic and kinetics–sluggish reaction; the research of photoanodes with photothermal and cocatalytic properties is of great significance. Herein, BiVO4/CoAl2O4 film photoanodes were studied for solar water splitting through coupling spinel p-type CoAl2O4 nanoparticles on n-type BiVO4 films. Compared to the BiVO4 photoanode, better performance was observed on the BiVO4/CoAl2O4 photoanode during water oxidation. A photocurrent of 3.47 mA/cm2 was produced on the BiVO4/CoAl2O4 photoanode at 1.23 V vs RHE, which is two-fold to the BiVO4 photoanode (1.70 mA/cm2). Additionally, the BiVO4/CoAl2O4 photoanodes showed an acceptable stability for water oxidation. The BiVO4/CoAl2O4 photoanode being of higher water oxidation performance could be attributed to the presence of p–n heterojunction, cocatalytic, and photothermal effects. In specific, under the excitation of λ < 520 nm light, the holes produced in/on BiVO4 can be transferred to CoAl2O4 owing to the p–n heterojunctions of BiVO4/CoAl2O4. Meanwhile, the temperature on the BiVO4/CoAl2O4 photoanode rises quickly up to ∼53 °C under AM 1.5 G irradiation due to the photothermal property of CoAl2O4 through capturing the 520 < λ < 720 nm light. The temperature rising on the BiVO4/CoAl2O4 photoanode improves the cocatalytic activity of CoAl2O4 and modifies the wettability of BiVO4/CoAl2O4 for effective water oxidation.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2021
·
IF 5.876
Fan Nie,Wenyue Xu,Di Zhang,Baizhi Jiang,Qi Sun,Junwei Wang
The N-doped two-dimensional (2D) carbon-based catalysts play a crucial role in the PMS catalytic activity of advanced oxidation processes (AOPs). However, their activation mechanism still lacks a reasonable explanation. A low-cost and one-step synthesis of N-doped graphite-2H nanoplatelets (N-GNPs) were prepared through the calcination under 600°C. N-GNPs 0.5 -600 was applied to activate permonosulfate (PMS) 19.4 times faster than that of pure PMS system under visible light to degrade bis(monochloro-s-triazine) reactive dye. We first demonstrate that electron arrangement in N-GNPs samples can effectively activate PMS and generate 1 O 2 as much as S O 4 · − and HO · as the main reactive species. The EPR test results were consistent with the quenching test. Density functional theory (DFT) calculations showed the graphite N adjacent C atoms (Eb= -8.9 eV) were promoted to produce more active sites. Bidirectional regulation of graphite N bonded C atoms form a local electron state, making the C most active electron donation. The 2P Z orbital of carbon atoms becomes occupied with the free electrons. The localized orbitals lead to the stronger Columbic repulsion of π electrons and enlarged interlayer distance, making it easier for the electrons to give out and accelerate the free-radical process.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Tao Ding,Yishuang Wu,Xun Zhu,Guiying Lin,Xun Hu,Hongqi Sun,Yong Huang,Shu Zhang,Hong Zhang
Co-doping of heteroatoms into the support of metal-supported catalysts is a prevalent method to improve the catalytic performance by adjusting metal–support interactions. This paper investigated the catalytic performances of Ru supported on biomass-derived char (Ru@Char), N-doped char (Ru@N-Char), and N,P-co-doped char (Ru@NP-Char) in the emerging lignin-first depolymerization for both poplar (hardwood) and pine (softwood) samples, with an emphasis on the production of phenolic monomers. Various characterizations of the prepared catalysts showed that the codoping of N,P not only facilitated the formation of micropores in the char but also introduced weak and moderate acid sites. Furthermore, the sizes of Ru nanoparticles on the codoped char became smaller, and the proportion of metallic Ru species was increased, resulting from electron transfer from Ru to the codoped char. The yields of the phenolic monomers from poplar and pine over Ru@NP-Char were as high as 57.98 and 17.53 wt % Klason lignin, respectively, which were improved by factors of 1.4–2.5 in comparison to Ru@Char and Ru@N-Char. Full delignification during the depolymerization of both poplar and pine was also achieved over Ru@NP-Char.
研究领域:
催化化学
·
生物质能
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Jingwei Huang,Tingting Liu,Rongfang Wang,Mingyi Zhang,Lei Wang,Houde She,Qizhao Wang
Cobalt oxide is an excellent water oxidation cocatalyst used in photoelectrochemical (PEC) water splitting field. Finding a facial way to load cobalt oxide on a semiconductor anode is important to effectively realize PEC water splitting on a large scale. In this work, a simple impregnation and calcination method is developed to fabricate CoO x /BiVO 4 anode. The constructed CoO x /BiVO 4 anode provides a photocurrent of 3.1 mA cm −2 at 1.23 V vs. RHE, about 2.8 times that of BiVO 4 anode (1.1 mA cm −2 ). Furthermore, both the charge separation and injection efficiency are improved by loading CoO x nanoparticles onto the BiVO 4 layer. Importantly, input voltage–output current characteristic curves are used for the first time to prove the formation of p-n junction between CoO x and BiVO 4 , which benefits to the separation of photogenerated holes and electrons. All results indicate that the impregnation and calcination method is efficacious for facile fabrication of CoO x /BiVO 4 photoanode with high performance.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Dandan Zhu,Qixing Zhou
In this study, a series of NCN/BiWO (NCN = N-doped graphitic carbon nitride , BiWO = Bi 2 WO 6 ) were fabricated successfully, which were characterized by XRD, TEM, FTIR, BET, UV–vis spectrometry, XPS and PL. Under visible light irradiation, the optimum mass ratio of 60 % NCN/BiWO could reach 93.1 % removal efficiency of phenol within 5 h, which was about 6.9 times as that pure Bi 2 WO 6 . And the degradation rate constant of 60 % NCN/BiWO (2.6726 min -1 ) was about 18.5 times as that of pure Bi 2 WO 6 (0.1442 min -1 ). According to the result of UV–vis absorption spectra, VB-XPS spectra and photoelectrochemistry performance, the photocatalytic mechanism of 60 % NCN/BiWO was revealed, indicating that the narrow band gap of 60 % NCN/BiWO is the main factor on the high photocatalytic activity . The stable and recyclable properties also were done, showing highly suitable for practical application.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CARBON
·
2013
·
IF 5.868
Xiuqing Meng,Sefaattin Tongay,Jun Kang,Zhanghui Chen,Fengmin Wu,Shu-Shen Li,Jian-Bai Xia,Jingbo Li,Junqiao Wu
ZnMg and NbCl 5 were intercalated in graphite and the presence of such molecules between the graphene sheets results in n- and p-type doping, respectively. The doping effect is confirmed by Hall and Raman measurements and the intercalation process is monitored by scanning tunneling microscopy . After intercalation the carrier concentration increase almost an order of magnitude and reaches values as high as 10 19 and 10 18 cm −3 for p- and n-type doping, respectively. For higher intercalation times, the intercalated graphite turns back to be as ordered as pristine one as evidenced by the reduction in the D peak in Raman measurements. Intercalation compounds show remarkable stability allowing us to permanently tune the physical properties of few-layer graphite. Our study has provided a new route to produce stable and functional graphite intercalation compounds and the results can be applied to other graphitic structures such as few-layer graphene on SiC.
研究领域:
凝聚态物理
·
材料科学
·
纳米科技
·
表面科学
·
半导体物理
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Zhan Cheng,Hongmin Zhu,Hanyang Ji,Zhenyu Yuan,Fanli Meng
N-butanol, a standard volatile organic compound (VOC) gas with toxicity and flammability, seriously endangers human life and health. It is imperative to achieve rapid and trace detection of n-butanol. Oxygen vacancies have been proven to be an essential factor for VOC gas adsorption at the surface of metal oxide semiconductor (MOS) gas sensors. In view of the above, BiFeO3 (BFO) nanoparticles with abundant oxygen vacancies were prepared via simple sol–gel and annealing. Crystal structure, morphology, and compositions were systematically analyzed by a series of characterizations (XRD, SEM, HRTEM, EPR, and XPS). The response of the synthesized BFO-2 sensor reached 19.37 to 100 ppm n-butanol with a detection limit of 0.28 ppm at an optimal operating temperature of 280 °C. In addition, BFO-2 also has a fast response time, good stability and repeatability, and favorable selectivity to n-butanol. It is crucial to systematically explore the excellent selectivity of BFO sensors due to their abundant oxygen vacancies and large intrinsic crystal defects. Herein, adjusting the calcination temperature is one constructive strategy to tune the oxygen vacancy, which would prompt the gas sensing performance of BFO sensors to n-butanol.
研究领域:
材料科学
·
传感器技术
·
环境监测
✓ 已验证
DOI
高影响因子
RUSSIAN JOURNAL OF ORGANIC CHEMISTRY
·
2025
·Vol. 61
·期 5
·872-880
·
IF 0.9
Tong Mengnan
A versatile, convenient, mild, and efficient method for the synthesis of N-benzoyloxyamines containing alkenone or allyl ester groups, starting from hydroxylamine derivatives, is developed and successfully extended to a broader range of tertiary amine analogs.
研究领域:
有机化学
·
药物化学
·
合成化学
·
生物医学化学
·
分子设计
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2019
·Vol. 26
·期 4
·1-11
·
IF 1.53
Yang Zhouxiaoshuang,Wang Feng,Liu Hui
With the spiropyran-containing compound as the initiator, dual responsive spiropyran-ended poly(N-vinyl caprolactam) (SP-PNVCL) was synthesized by atom transfer radical polymerization. The structure of the resulting polymer was characterized by 1 H NMR and gel permeation chromatography, and the polymer had both reversible light-responsive and thermo-sensitive behaviors. Metal ions could be bound between merocyanine formed by photoisomerization of spiropyran and the amino group of N-vinyl caprolactam unit through synergetic coordination. The complexation of SP-PNVCL with several metal ions was investigated by UV-Vis absorption spectroscopy, and it was found that SP-PNVCL might be used as a potential recognition probe for Fe 2+ , accompanied by obvious color change from colorless to brown by naked eye. The detection limit and photo-reversible recyclable behaviors of SP-PNVCL for Fe 2+ were also investigated in details. The kind of spiropyran-ended poly(N-vinyl caprolactam) had great application potential in environment protection and biological area.
研究领域:
高分子化学
·
环境科学
·
生物医学工程
·
分析化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Jiakang Han,Zihao Qiu,Gerile Naren,Rui Meng,Zikang Hu
In recent years, rare earth complexes containing amino acids have attracted much attention in numerous fields, such as light, electricity, catalysis, biological activity, drugs, etc. The rare earth element terbium is considered an important fluorescent metal due to its special electronic structure. It has excellent photophysical properties, such as high color purity, large Stokes shift, long excited state lifetime, and profuse energy levels. It has been used in the fields of fluorescent probes, medical radiation, and chemical sensors. Considering their wide applications, a series of acyl amino acid terbium complexes were synthesized using N-acyl amino acids as ligands, and their structures and photophysical properties were studied. The analysis of the theoretical and experimental results demonstrates that the energy transfer efficiency from ligands to the terbium ion emission levels increases with increasing alkyl carbon chain length, leading to differences in the luminescent intensity of the complexes. The energy transfer efficiency from ligands to rare earth ions was the result of a combination of the relative positions between the resonance energy levels of the central rare earth ion and the lowest triplet state energies of ligands as well as the intersystem crossing probability of the ligands. Moreover, the density functional theory (DFT) was used to determine the geometric structures and obtain 1 H NMR and FT-IR spectra of the terbium complexes. Their structures were further examined by comparing the calculated with the experimental spectra. The results show that the ligands coordinate to the central Tb 3+ through the bidentate chelation mode and that the theoretically determined structure was reliable.
研究领域:
化学
·
材料科学
·
光物理学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 5
·期 9
·6666-6674
·
IF 3.708
Linlin Duan,Wei Huang,Yatao Zhang
N-Halamine grafted halloysite nanotubes (N-halamine@HNTs) were used as an antibacterial agents to fabricate polyethersulfone (PES) ultrafiltration (UF) hybrid membranes. N-Halamine@HNTs were characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectra (XPS). The chemical compositions, storage modulus, tan δ, morphology and performance of the membranes were characterized by attenuated total reflection-Fourier transform infrared spectra (ATR-FTIR), dynamic mechanical analysis (DMA), water contact angle, scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), overall porosity and pore size measurements. The results showed that the hydrophilicity of the membranes was improved greatly after adding N-halamine@HNTs. Water flux of the hybrid membrane could reach as high as 248.3 L m−2 h−1 when the content of N-halamine@HNTs was 1.0 wt%. In addition, the antibacterial test indicated that the hybrid membranes showed good antibacterial activity against E. coli.
研究领域:
材料科学
·
环境工程
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Chenyang Shi,Bo Hong,Xueya Zhang,Qian Xiang,Zhian Zhang,Kai Zhang,Jing Fang,Yanqing Lai
Lithium-sulfur batteries are considered to be the most promising high-energy-density storage system, yet the dissolution of polysulfides during the charging process limits the utilization, and cycle stability of active materials, which affects the practical application of lithium-sulfur batteries. Herein, a poly( N -methylaniline) (PMAn) coating film is formed in situ on the cathode surface by electrochemically polymerizing the monomer of N -methylaniline(MAn) contained in the electrolyte during film formation process. The PMAn coating film on the surface of the cathode can prevent the dissolution of polysulfide, then reduce the loss of active material, and slow the oxidation of polysulfide by lithium nitrate , resulting in improved cycle stability. As a result, the lithium-sulfur battery with 0.5 wt% MAn render an initial discharge specific capacity of 1224 mAh/g and a capacity retention of 63.79% for 200 cycles, which is better than the performance of the battery without MAn.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）