作者机构：
[Nguyen, Nhat Truong; Mao, Chengliang; Duchesne, Paul N.; Wang, Lu; Jelle, Abdinoor A.; Xia, Meikun; Ozin, Geoffrey A.] Univ Toronto, Dept Chem, Solar Fuels Grp, Toronto, ON M5S 3H6, Canada.;[Wang, Lu] Chinese Univ Hong Kong, Sch Sci & Engn, Shenzhen 518172, Guangdong, Peoples R China.;[Mao, Chengliang] Cent China Normal Univ, Coll Chem, Inst Environm & Appl Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.;[Yan, Tingjiang] Qufu Normal Univ, Coll Chem & Chem Engn, Key Lab Life Organ Anal, Qufu 273165, Shandong, Peoples R China.;[Lu, Zheng-Hong; Li, Peicheng] Univ Toronto, Dept Mat Sci & Engn, Toronto, ON M5S 3E4, Canada.
通讯机构：
[Ozin, Geoffrey A.] U;Univ Toronto, Dept Chem, Solar Fuels Grp, Toronto, ON M5S 3H6, Canada.
关键词：
CO2 photocatalysis;titanium nitride;indium oxide;photothermal;reverse water gas shift
摘要：
Herein is developed a ternary heterostructured catalyst, based on a periodic array of 1D TiN nanotubes, with a TiO(2) nanoparticulate intermediate layer and a In(2)O(3-x)(OH)(y) nanoparticulate shell for improved performance in the photocatalytic reverse water gas shift reaction. It is demonstrated that the ordering of the three components in the heterostructure sensitively determine its activity in CO(2) photocatalysis. Specifically, TiN nanotubes not only provide a photothermal driving force for the photocatalytic reaction, owing to their strong optical absorption properties, but they also serve as a crucial scaffold for minimizing the required quantity of In(2)O(3-x)(OH)(y) nanoparticles, leading to an enhanced CO production rate. Simultaneously, the TiO(2) nanoparticle layer supplies photogenerated electrons and holes that are transferred to active sites on In(2)O(3-x)(OH)(y) nanoparticles and participate in the reactions occurring at the catalyst surface.
摘要：
We prepared a novel covalent rubber-based polyurethane/starch composites material via a simple and effective method. Infrared, scanning electron microscopic, and mechanical tests demonstrated that polyurethane microparticles showed good compatibility with starch as the polyurethane content increases. This is mainly because of the urethane bond newly formed by –OH in starch and –NCO in rubber-based polyurethane. And when the rubber-based polyurethane content increased from 20% to 30%, its elongation at break improved by 116.9%. CPB30 showed excellent hydrophobicity and toughness, which showed potential application.
通讯机构：
[Ma, Qingxin] C;[Ma, Qingxin] U;Chinese Acad Sci, State Key Joint Lab Environm Simulat & Pollut Con, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China.;Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China.;Chinese Acad Sci, Ctr Excellence Urban Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China.
摘要：
In this work, a relationship between the role of NH3 and the properties of mineral oxides (alpha-Fe2O3, alpha-Al2O3, CaO, and MgO) in the evolution of NO3-, SO42-, and NH4+ has been established. It was found that the promotion effect of NH3 was more favorable for the formation of NO3- (or SO42-) and NH4+ on acidic alpha-Fe2O3 and alpha-Al2O3 due to acid base interactions between NO2 with NH3 or between SO2 and NH3, while this effect was weaker on basic CaO and MgO possibly due to their basic nature. The acid base interaction (NO2/SO2 with NH3) overpowered the redox reaction (SO2 with NO2) on Fe2O3 owing to its unique redox chemistry. However, the opposite was found on basic CaO and MgO for the formation of SO42- and NO3-. Under equivalent concentration conditions, the two synergistic effects did not further strengthen on Fe2O3, CaO and MgO due to a competition effect. In NH3-rich situation, a synchronous increase of SO42-, NO3-, and NH4+ occurred on Fe2O3. On acidic Al2O3, the favorable adsorption of NH3 on the surface as well as the existence of NO2 with an oxidizing capability synergistically promoted the formation of SO42-, NO3-, and NH4+.
摘要：
A new cadmium(II) arenedisulfonate coordination polymer with uncoordinated pyridyl groups, formulating as [Cd(tpim)(2,6-nds)](n) (1), was synthesized by the hydrothermal reaction of 2,6-naphthalenedisulfonate (2,6-nds), 2,4,5-tri(4-pyridyl)-imidazole (tpim) and Cd(CH3COO)(2). The functional utility is investigated by employing 1 as an efficient heterogeneous nucleophilic catalyst for the acetylation of phenols. The catalyst 1 is stable under the studied reaction conditions, and could be recycled without significantly losing activity.
作者机构：
[Wang, Pingshan; Zhang, Zhe] Guangzhou Univ, Minist Educ, Environm Res Great Bay, Key Lab Water Qual & Conservat Pearl River Delta, Guangzhou 510006, Guangdong, Peoples R China.;[Wang, Lei; Shihadeh, Sammy; Zhang, Zhe; Li, Xiaopeng; Wang, Heng] Univ S Florida, Dept Chem, Tampa, FL 33620 USA.;[Xu, Yaping; Shi, Junjuan; Wang, Ming] Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Jilin, Peoples R China.;[Liu, Changlin; Zhang, Zhe] Cent China Normal Univ, Sch Chem, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Hubei, Peoples R China.;[Hao, Xin-Qi; Zhao, Fu-Jie] Zhengzhou Univ, Coll Chem & Mol Engn, Zhengzhou 450001, Henan, Peoples R China.
通讯机构：
[Li, Xiaopeng] U;[Wang, Ming] J;Univ S Florida, Dept Chem, Tampa, FL 33620 USA.;Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Jilin, Peoples R China.
关键词：
3D nanocages;self-assembly;supramolecules;terpyridine
摘要：
Coordination‐driven self‐assembly as a powerful bottom‐up approach has been extensively used to construct multifarious supramolecular architectures with increasing complexity and functionality. Due to the unique cavity structures and precisely controllable dimensions, 3D supramolecules display unprecedented properties and functions in catalysis, sensing, gas storage, and smart materials. Herein, we have built two 3D nanocages with different sizes by changing the length of the organic ligand arms. The structures were characterized by 1D and 2D NMR spectroscopy, electrospray ionization‐mass spectrometry (ESI‐MS), traveling wave ion mobility‐mass spectrometry (TWIM‐MS), gradient tandem‐mass spectrometry (gMS2), and transmission electron microscopy (TEM). Furthermore, the intermolecular dynamic exchange of two 3D nanocages was conducted to construct a series of hybrid 3D structures as evidenced by mass spectrometry. Two 3D nanocages with different sizes are assembled successfully by a stepwise approach. The further dynamic ligand exchange between two preassembled nanocages generated as a series of hybrid supramolecular nanocages, suggesting the remarkable tolerance of such structures with different edge length. The rapid communication between supramolecules via ligand exchange further increased the complexity of the system.
摘要：
In this study, an electrochemical/electro-Fenton oxidation (EC/EF) system was designed to degrade atrazine, by utilizing boron-doped diamond (BDD) and Fe@Fe2O3 core-shell nanowires loaded active carbon fiber (Fe@Fe2O3/ACF) as the anode and the cathode, respectively. This EC/EF system exhibited much higher degradation rate, decholorination and mineralization efficiency of atrazine than the electrochemical (EC) and electrochemical/traditional electro-Fenton (EC/TEF) oxidation counterpart systems without Fe@Fe2O3 core-shell nanowires. Active species trapping experiment revealed that Fe@Fe2O3 could activate molecular oxygen to produce more OH through Fenton reaction, which favored the atrazine degradation. High performance liquid chromatography, high performance liquid chromatography-mass spectrometry and gas chromatography-mass spectrometry were applied to probe the decomposition and mineralization of atrazine during this novel EC/EF process, which revealed that two intermediates of triazinons (the isomerization of hydroxylated atrazine) were generated during the electrochemical/electro-Fenton oxidation of atrazine in the presence of Fe@Fe2O3 core-shell nanowires. The experimental and theoretical calculation results suggested that atrazine might be degraded via a triazinon ring opening mechanism, while the presence of Fe@Fe2O3 notably accelerated the decholorination process, and produced more hydroxylated products to promote the generation of trazinons and the subsequent ring cleavage as well as the final complete mineralization. This work provides a deep insight into the triazine ring opening mechanism and the design of efficient electrochemical advanced oxidation technologies (EAOTs) for persistent organic pollutant removal.
作者机构：
[Xiong, Bo; Wang, Lingling; Jiang, Shichang; Wang, Yujiao; Ye, Mingyue; Bao, Yajing] Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticides & Chem Biol, Wuhan 430079, Peoples R China.
通讯机构：
[Xiong, Bo] C;Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticides & Chem Biol, Wuhan 430079, Peoples R China.
摘要：
A microfluidic emitter based on three-dimensional hydrodynamic focusing was developed to generate a wrapped charged aerosol plume, in which the distribution of the sample ion in the nanoelectrospray could be regulated. Deposition patterns of the wrapped spray from the proposed three-dimensional hydrodynamic focusing nanoelectrospray emitter (3D HFNE) were collected under different conditions to ensure the wrapped configuration. Moreover, sample ion intensities as well as their ratios to a focusing background ion were studied as a function of different displacements from the center of the wrapped electrospray to confirm the inhibition of ion expansion. Furthermore, the proposed 3D HFNE indicated improved sensitivities compared with a reported nanoelectropray emitter as well as its commercial ESI counterpart, and this demonstrated its capacity for determining samples with low concentrations and infusion rates. In addition, the proposed 3D HFNE was compatible with various sample flow compositions (from 100% methanol to 100% water) and a broad infusion rate range (from 10 nL min(-1) to 15 mu L min(-1)). Finally, its stability and durability were indicated to be acceptable for various determinations. Therefore, the 3D HFNE is a potential option to achieve on-line nanoelectrospray MS determinations using microfluidics with conventional mass spectrometers, considering its low cost and user-friendly properties.
作者机构：
[Wang, Long; Guan, Zhi-Rong; Ding, Ming-Wu] Cent China Normal Univ, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.;[Wang, Long] China Three Gorges Univ, Coll Mat & Chem Engn, Yichang 443002, Hubei, Peoples R China.
通讯机构：
[Ding, Ming-Wu] C;Cent China Normal Univ, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.
摘要：
A one-pot synthesis of 1H-isochromenes and 1,2-dihydroisoquinolines by a I-MCR/Wittig sequence was developed. The reaction of phosphonium salt 5, an acid, an amine ( or without), and an isocyanide gave the 1H-isochromenes 7 or 1,2-dihydroisoquinolines 9 in good yields by a sequential Passerini or Ugi condensation and an intramolecular Wittig reaction in the presence of K2CO3.
