SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Tao Jiang,Ling Cheng,Yingchun Han,Jun Feng,Jingdong Zhang
A p-n heterojunction film of Bi 2 O 3 -WO 3 with enhanced photoelectrocatalytic (PEC) activity was successfully constructed by a facile one-pot hydrothermal synthesis. The as-prepared Bi 2 O 3 -WO 3 heterojunction film exhibited flower-like microstructures. Compared with pristine Bi 2 O 3 and WO 3 films, the Bi 2 O 3 -WO 3 composite film exhibited enhanced absorption in the visible region. The formation of Bi 2 O 3 -WO 3 p-n heterojunction facilitates the interfacial transfer of electrons as well as the separation of charge carries. As a result, the Bi 2 O 3 -WO 3 film showed high photocurrent response under visible light illumination. Furthermore, the enhanced visible light PEC performance of Bi 2 O 3 -WO 3 film was evaluated by the decoloration of Rhodamine B. When the Bi 2 O 3 -WO 3 film was applied to norfloxacin removal, the degradation efficiency reached 88.4% after 6 h PEC process under visible light illumination. According to nine intermediates identified by liquid chromatograph-mass spectrometric analysis, a possible PEC degradation mechanism for norfloxacin was proposed.
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Limin Guo,Runze Hu,Caifu Zhong,Xinxin Wang,Jiaming Liu,Xiaohui Wang
An elegant templating method has been developed for the rational design and synthesis of hierarchical SnS 2 nanoclusters composed of ultrathin nanosheets and embedded inside TiO 2 nanoporous arrays. Herein, benefiting from their unique structural merits and metal-like plasmonic activity, the TiO 2 @SnS 2 heterostructures exhibit enhanced photocatalytic H 2 evolution properties in terms of good cycling performance. S vacancies and N-doping are proved to be vitally important to the electronic structures and bandgap of SnS 2 , thus influence the plasmonic property and separation of photo-carriers. The optimized TiO 2 @6nmSnS 2 /N nanoporous arrays give an ultra-high H 2 yield rate of 285 μmol h −1 cm −2 under a low catalyst loading mass, that comparable to most noble metal catalysts . Remarkable cycling performance with a capability retention of 90% is achieved after 30 h under solar light illumination. As an innovative exploration, this study demonstrates that the photocatalytic activities of nonmetal, earth-abundant SnS 2 can be enhanced with plasmonic effect, which may serve as an excellent catalytic agent for solar energy conversion to chemical fuel.
✓ 已验证
DOI
高影响因子
Catalysts
·
2022
·Vol. 12
·期 8
·877
·
IF 4.501
Yidan Fu,Lina Han,Pengfei Zheng,Xianhui Peng,Xianglan Xian,Jinglin Liu,Xiaoyuan Zeng,Peng Dong,Jie Xiao,Yingjie Zhang
It is desirable to prepare low-cost non-noble metal catalysts using a simple and efficient method. Herein, we display for the first time that nitrogen-doped hierarchical porous carbon-supported vanadium nitride (VN/NC/C-x) catalysts can be regulated by dicyandiamide (DCDA). The introduction of DCDA not only effectively controls the pore structure, but also plays an important role in adjusting oxygen vacancies and d-electrons. In addition, DCDA is not only a significant raw material for the N-doped carbon, but also a nitrogen source for the preparation of vanadium nitride. The VN/NC/C-3 catalyst was prepared after optimization of the preparation parameters, and the macro/micro structure demonstrates a superior ORR performance in alkaline media with a positive onset potential of 0.85 V and a half-wave potential of 0.75 V, the limiting current density is as high as 4.52 mA·cm−2, and the Tafel slope is only 75.54 mV·dec−1. The VN/NC/C-3-based Zn–air battery exhibits a highest peak power density (161.82 mW∙cm−2) and an excellent energy density (702.28 mAh·kgZn−1and 861.51 Wh·kgZn−1). This work provides a valuable synthetic approach for the preparation of other transition metal nitride catalysts with a relative economic value and high performance.Keywords:VN/NC/C;N-doped carbon;oxygen vacancies;oxygen reduction reaction;Zn–air battery
✓ 已验证
DOI
高影响因子
SOLID STATE PHENOMENA
·
2022
·
IF 0
Xiao Ying Yan,Guo Bao Zhang,Rong Hui Yuan,Xiang Yu Ye,Xi Xi Chen,Hui Hui He
We reported a facile solvothermal approach to synthesize C/N-doped TiO2 (C/N-T) using a template-free method. The morphology and composition of the C/N-T were evaluated by transmission electron microscopy, X-ray diffraction, wavelength dispersive spectroscopy and X-ray photoelectron spectroscopy. The photodegradation of formaldehyde was studied in environmental chambers under specific conditions combined with UV-Vis determinations. The catalytic oxidations of C/N-T nanoparticles were characterized by degrading formaldehyde of plywood, which was induced via visible-light illumination. A maximum 95.7% of degradation efficiency within 55 min showed enhanced photocatalytic activity.
✓ 已验证
DOI
Catalysts
·
2022
·Vol. 12
·期 10
·1278
·
IF 4.501
Ying Wang,Huilin Xie,Kunming Liu,Jinhui Li,Jin-Biao Liu
Herein, we report a copper-catalyzed C-O cross-coupling of N-methoxy amides and arylboronic acids for the synthesis of aryl-N-methoxy arylimides. The fully selective O-arylation of the N-methoxy amides is found to be greatly prompted by the inexpensive and commercially available CuI. The reaction conditions tolerate a variety of functional groups and promote different reactivities depending on the electronic and steric properties of the distorted substrates.Keywords:copper catalyzed;N-methoxy amides;selective C-O cross-coupling;aryl-N-methoxy arylimides
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 25
·10352-10358
·
IF 3.288
Danlin Bu,Na Li,Yu Zhou,Hengyu Feng,Fei Yu,Chunxia Cheng,Ming Li,Linghan Xiao,Yuhui Ao
N-Halamine-based antibacterial materials are widely used due to their excellent characteristics. However, the N–Cl bonds in N-halamine-based materials are not stable under UV light irradiation so that they are difficult to recover and reuse. Here, a kind of N-halamine-immobilized Fe3O4@SiO2@TiO2(F@S@T-Cl) nanoparticles were prepared. In addition, the UV stability and regeneration capacity were also studied after variable time exposure to UV light. The results showed that nanoparticles have great antibacterial properties against Staphylococcus aureus and Escherichia coli. Meanwhile, the N–Cl bond in the nanocomposite showed outstanding storage stability under UV light irradiation and good regeneration ability; the material can realize cyclic utilization and solve the problem of secondary pollution of the antibacterial material. It provides a broader application prospect for the recyclable N-halamine antibacterial material.
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2020
·Vol. 38
·期 7
·685-695
·
IF 3.154
Wang Sheng,Cai Si-Liang,Zhang Jie,Wan Xin-Hua
A series of novel cis poly(phenylacetylene)s (PPAs) substituted at meta -position(s) by two alkoxycarbonyl pendants, i.e. , sP-Me-C8/rP-Me-C8 , P-Me-C12 , sP-Et-C4 , sP-2C4 and sP-Oct-C4 , were synthesized under the catalysis of [Rh(nbd)Cl] 2 (nbd = norbornadiene). The dependence of elongation, screw sense, and stimuli response of helical polyene backbone on the structure of pendant, solvent, and temperature was systematically investigated in both solution and solid states. Because of n → π * interaction between vicinal carbonyl groups, sP-Me-C8/rP-Me-C8 could adopt contracted cis-cisoid helix in THF, toluene, CH 2 Cl 2 , and CHCl 3 . Such an intramolecular interaction was sensitive to the hydrogen bond donating ability of solvent and temperature, but insensitive to the dielectric constant and polarity of solvent. In poly(3-methoxycarbonyl-5-alkoxycarbonylphenylacetylene), the longer the chiral alkyl chain was, the easier the stable cis-cisoid helix could be achieved. However, when the methoxycarbonyl was changed to ethoxycarbonyl, sec -butyloxycarbonyl, and octyloxycarbonyl pendant groups, only cis-transoid helix was obtained at room temperature due to the increased steric hindrance. Moreover, lowering temperature was found to facilitate the stabilization of n → π * interactions, and reversible temperature-dependent stereomutations were achieved in sP-Me-C8 and sP-Et-C4 depending on the solvent where they were dissolved. These results suggested that the long alkyl chain, small pendant size, and lower temperature favored the stabilization of intramolecular n → π * interactions and the formation of contracted, cis-cisoid helices for poly(3,5-diester substituted phenylacetylene)s.
✓ 已验证
DOI
高影响因子
RSC Advances
·
2013
·Vol. 4
·期 12
·6048-6054
·
IF 2.562
Zhiqiang Jie,Xiufang Yan,Lianhong Zhao,Shelby Davis Worley,Jie Liang
An effective macroporous cross-linked antimicrobial polymeric resin containing N-halamine and quaternary ammonium salt moieties was synthesized in an eco-friendly and economical way. Commercially available macroporous crosslinked chloromethylated polystyrene (CMPS) resin reacted with the salt of 5,5-dimethylhydantoin (DMH) and trimethylamine (TMA) in water to produce a polymeric resin containing hydantoinyl and quaternary ammonium salt moieties, poly(p-methylstyrene)-3-(5,5-dimethylhydantoin)-co-trimethyl ammonium chloride (PSHTMA). The hydantoinyl groups in PSHTMA were converted to an antimicrobial N-halamine structure by a facile chlorination reaction in dilute NaOCl solution. The as-synthesized antimicrobial polymeric resin (Cl-PSHTMA) was characterized by FT-IR, X-ray photoelectron spectroscopy, and zeta-potential measurement. The antimicrobial tests showed that the as-synthesized antimicrobial polymeric resin was capable of 7-log inactivation of S. aureus and 8-log inactivation of E. coli within 1 minute contact time. Moreover, the N-halamine moieties in Cl-PSHTMA exhibited excellent regenerability.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Wei Li,Shu-ao He,Zi-ying Su,Wei Xu,Xue-chuan Wang
In this paper, the CuO nanoparticles (NPs) with narrow bandgap and near-infrared light response were chosen as the co-catalyst, and a series of BiOCl-CuO (BC-x, x = 1, 2 and 3) heterojunctions with superior visible light response and fast interfacial charge migration were synthesized by a facile one-pot solvothermal method. Then, the morphology, composition, crystal structure, photoelectronic properties and visible-light photocatalytic performance were studied in sequence. Research shows that the incorporation of CuO NPs can effectively enhance the photocatalytic performance of BiOCl semiconductor. For the moderate incorporation of CuO NPs, the p-n heterojunction interfaces can be fabricated between BiOCl and CuO components, so that the light response and interfacial charge migration ability can be effectively improved. Especially, when the content of incorporated CuO NPs was about 0.02 g, the BC-2 heterojunction exhibited the highest photocatalytic activity and very robust photostability in decomposing organic targeted pollutants (acid orange (AO) and bisphenol A (BPA)) and H 2 evolution reaction (HER) experiments under visible-light illumination.
✓ 已验证
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Yulin Ding,Yumiao Su,Jiajing Huang,Ting Wang,Min-Yu Li,Wenmu Li
Green and environment-friendly high-efficiency flame retardants (FRs) are crucial to polymer FR modification. Here, a green FR 2-((bis(2-hydroxyethyl)amino)methyl)-5,5-dimethyl-1,3,2-dioxaphosphinane 2-oxide (HAMPP) was synthesized. The HAMPP was incorporated with a cyclic phosphorus structure, which will readily carbonize to inhibit or prevent further combustion. Moreover, the HAMPP contains dihydroxy reactive groups that can be used as a monomer in the polymerization reaction to obtain the main chain containing phosphorus polymer. Research studies on FRs were based on flexible polyurethane foam (PU-HAMPPs). The limiting oxygen index value of PU foam with 10% HAMPP could reach 23.7%, passing a UL-94 V-0 rating together. With the addition of HAMPP, the peak heat release rate of PU foam decreased significantly, the decomposition temperature increased, the heat release capacity reduced by 31%, and the char yield increased by 42%. The chemical composition and morphology of the char residual have been studied and analyzed thoroughly. We find that HAMPP forms a molten viscous protective layer uniformly on the material surface and releases some incombustible gases. These indicated that the FR exploited both condensed-phase and gas-phase flame retardancy mechanisms. Besides, the addition of FRs improved the mechanical properties.
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 10
·7902-7907
·
IF 3.289
Sihua Qian,Yumin Leng,Hengwei Lin
Colorimetric sensor arrays demonstrate numerous superior features in chemo- and bio-sensing, but they are generally not applicable to less-reactive analytes. Based on the findings that N-methyl carbamate pesticides could be decomposed into reactive phenols in basic media, herein, a novel strategy of strong base pre-treatment was developed and employed for the colorimetric sensor array detection and differentiation of the N-methyl carbamate pesticides in an indirect manner. With the use of five inexpensive and commercially available phenol responsive indicators, such a colorimetric sensor array can be facilely fabricated. Classification analysis (e.g. hierarchical clustering analysis (HCA) and principal component analysis (PCA)) reveals that the as-fabricated sensor array has an extremely high dimensionality and, consequently, exhibits excellence in discriminating a variety of N-methyl carbamates from other types of pesticides and potential interferants, and further identifying them exactly from each other. Moreover, semi-quantitative detection could also be achieved through combining HCA/PCA, recognition patterns, and corresponding fitting curves. Overall, the as-developed method exhibits high selectivity and sensitivity, good anti-interference, simultaneous detection and identification capability for each of the N-methyl carbamate pesticides, and potential applicability in real samples. Most importantly, this study demonstrates that pre-treatment strategies are very effective in expanding the range of applications of colorimetric sensor array methodology to less-reactive analytes.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2015
·Vol. 27
·期 3
·3021-3025
·
IF 1.569
Zhang Xiwei,Tang Zhenjie,Hu Dan,Wang Zhi,Yu Fengjun,Cui Haitao,Xu Tongshuai,Ju Lin
A facile method was used to oxidize p-type Zinc Selenide (ZnSe) nanowires into n-type Zinc Oxide (ZnO) through a 700 °C annealing process in air. Single crystal ZnSe nanowires, with a hole concentration of 0.805 × 10 18 cm −3 and
a negative photoconductivity, were oxidized into polycrystalline ZnO nanowires with an electron concentration of 4.88 × 10 18 cm −3 and a positive photoconductivity. Additionally, both the as-synthesized ZnSe nanowires and the post-oxidized ZnO nanowires presented excellent optoelectronic properties. This method can be used to construct radial p–n junctions or other nano-devices based on a single NW through a regioselective oxidation process.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）