ACS Catalysis
·
2025
·
IF 13.1
Yufeng Li,Jinbiao Yuan,Yunxuan Ji,Siyang Yan,Jiaxu Liu,Bing Liu,Xiaohao Liu
Developing efficient and stable catalysts to convert CO2 to desirable C1 products is of great importance for carbon resource utilization. Cobalt-based catalysts usually show high activity in methanation but poor selectivity to CO from the reverse water-gas shift (RWGS) reaction. Herein, we synthesized In-doped CeO2-supported cobalt catalysts for RWGS reaction, which achieved almost reverse 100% selectivity toward CO with a near-equilibrium CO2 conversion of about 49% at 500 °C and 1 MPa. Results showed that catalyst reduction could result in In species migration onto Co particles to form an InCo alloy, thereby modulating the cobalt electronic structure. It thus strengthened Co–H* bonding but weakened CO adsorption and activation, in turn inhibiting CH4 formation via HCOO* and CO hydrogenation. Interestingly, the reaction temperature-dependent deactivation was observed over 10Co/CeO2, owing to cobalt oxidation determined by the O atom chemical potential (μO). Theoretical investigations demonstrate that μO is related to the free energy of H2O and H2 (μO = GH2O‐GH2), where the reaction temperature exhibits different degrees of effect on GH2OandGH2. Based on the deactivation behavior study, we successfully developed a simple strategy to suppress oxidation deactivation by mixing with hydrophilic H-ZSM-5 zeolite to drive H2O desorption away from the cobalt surface during the CO2 methanation reaction with much more H2O molecules produced.
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Materials Horizons
·
2021
·Vol. 8
·期 12
·3432-3442
·
IF 13.266
Fei Zhang,Xinzhen Ji,Wenqing Liang,Ying Li,Zhuangzhuang Ma,Meng Wang,Yue Wang,Di Wu,Xu Chen,Dongwen Yang,Xinjian Li,Chongxin Shan,Zhifeng Shi
Recently, the newly-emerging lead halide perovskite quantum dots (QDs) have attracted intensive research interest for lighting and display applications owing to their remarkable optoelectronic properties. It is regrettable that the toxicity and instability of lead largely hinder their practical applications. Here, zero-dimensional (0D) cesium indium halide (Cs3InX6) QDs were synthesized for the first time using a modified ligand-assisted reprecipitation method, and the emission wavelength can be tuned facilely via an anion exchange reaction. Typically, the Cs3InBr6 QDs showed broadband blue emission with a high photoluminescence (PL) quantum yield of 46%. First-principles calculations were performed and temperature-dependent PL was studied to investigate the emission mechanisms of the Cs3InBr6 QDs; the 0D nature of Cs3InBr6 enhances the localization of excitons, resulting in a large exciton binding energy. It is worth noting that the strong electron–phonon coupling of Cs3InBr6 indicates that the broadband emission comes from self-trapped exciton emission. Moreover, the Cs3InX6 QDs exhibit excellent stability against moisture, ultraviolet light and heat degradation, significantly better than for conventional lead halide perovskites. Subsequently, the white light-emitting diodes (WLEDs) prepared using blue-emissive Cs3InBr6 QD powder used as the phosphor showed an excellent working stability with a record half-life (T50) of 186 h. Even if the operating temperature is as high as 106.9 °C, the LED can still operate well and reach a T50 of 50 h. These results highlight the huge advantages and application potential of 0D Cs3InX6 QDs as an environmentally friendly emitter in the field of solid-state lighting.
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Chemical Biology & Drug Design
·
2020
·Vol. 96
·期 6
·1433-1446
·
IF 2.548
Yibing Guo,Liancheng Xu,Changchun Ling,Tao Yang,Wenjie Zheng,Jin Lv,Qingsong Guo,Bohua Chen
Eighteen new β-carboline-based indole-4,7-quinone derivatives ( 12a–i and 13a–i ) were designed and synthesized, and their in vitro and in vivo antiproliferative activities were studied. Most of target compounds showed strong inhibition on three human tumor cells' proliferation. In particular, the most active compound 13g not only displayed more prominent antiproliferative activities than β-lapachone, a clinical antitumor candidate, but also exerted significant NAD(P)H: quinone-oxidoreductase-1 (NQO1) inhibitory activity and NQO1-dependent cytotoxicity in HT29 cells. Furthermore, 13g dose-dependently induced high ROS levels in HT29 cells, and selectively inhibited cancer cell but not non-tumor colon cell proliferation in vitro. Importantly, 13g promoted HT29 cell apoptosis and DNA damage by regulating relative apoptotic proteins and H2AX expression. Finally, 13g displayed significant growth inhibition of HT29 human colorectal adenocarcinoma xenograft in mice without overt toxicity.
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高影响因子
WASTE MANAGEMENT
·
2025
·
IF 7.1
Dongping Song,Tao Huang,Xiaolong Sun,Yun Xia,Chong Luo,Jialin Cui,Kai Chen,Weihua Liu,Jie Ren
The poor pozzolanic activity and high alkalinity of municipal solid waste incineration fly ashes (MSWI-FA) would deteriorate the stability of the MgO-SiO 2 -H 2 O (M−S−H) binder system, further inhibiting the treatment capacity of cement to wastes. In this study, sulfhydryl-functionalized graphene oxide nanoparticles (SFG) were synthesized and incorporated into the MSWI-FA-blended M−S−H (MSH-MSWI-FA) system to strengthen the solidification/stabilization (S/S) of both heavy metals (HMs) and chloride salts in the matrix and mechanical stability of cement. The linear increases in nanomaterials (from 0.5 % to 2.5 %) and MSH (from 40 % to 80 %) both decreased the concentrations of HMs and Cl anions leached from the solidified cubes in the MSH-MSWI-FA cementation. The least leaching concentration of Zn, Cu, Pb, Cd, Cr, and Cl were 0.0046 mg/L, 0.0032 mg/L, 0.014 mg/L, 0.00068 mg/L, 0.030 mg/L, and 0.36 g/L from the SFG-MSH-MSWI-FA cemented samples, respectively. The incorporation of graphene oxide nanoparticles (NGO) and SFG elevated the residual moieties of HMs, enhanced the mechanical strength and acid resistance, and improved the microstructural properties of MSH-MSWI-FA cementation. SFG played a more dominant role in the enhancement than NGO. Sulfhydryl-functionalization for nanomaterials intensifies the improvement process. The minerals including M−S−H, CaO-SiO 2 -H 2 O (C-S-H), and Phase-5 were formed in the MSH-MSWI-FA cement. Silica fume (SF), lightly burnt magnesia (CC-MgO), and MSWI-FA reacted with each other in a ternary system, which induced the self-alkali-activated cementation of C-S-H, M−S−H, and magnesium oxychloride (MOC) cement.
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JOURNAL OF ORGANIC CHEMISTRY
·
2025
·
IF 3.6
Yang Zhu,Guisheng Deng
The I2-catalyzed reaction of 1-(2-hydroxyphenyl)-propargyl alcohols with indoles and subsequent treatment with K2CO3 provided (benzofuran-3-yl)-1H-indoles in good to excellent yields with high regioselectivity. This one-pot and two-step strategy proved to be suitable for a wide range of substrates except for aliphatic alkynyl alcohols as well as the indoles bearing N-protected groups such as the Ts group possessing strong electron-withdrawing feature. The reaction procedure involved a cross-coupling and the construction of a benzofuran framework via 5-exo-dig cyclization.
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Catalysis Science & Technology
·
2019
·Vol. 9
·期 18
·5130-5141
·
IF 5.726
Shuang Song,Qiuxiang Liu,Jinhui Fang,Weiting Yu
The reductive dechlorination of chlorinated organic compounds (COCs) is very important to reduce the toxicity of waste effluents produced from pharmaceutical, electronics, dyestuff, pesticide, paper, and plastics industries. Electrochemical dechlorination as a green technology under mild reaction conditions is widely used in the reductive dechlorination of COCs using Pd as the electrode. Currently, the challenges of this method are the need to use large Pd loadings and the low dechlorination efficiency. Efforts were made in this work to reduce the loading of Pd and improve the efficiency using 2,4-dichlorophenoxyacetic acid (2,4-D) as a probe molecule for COCs in dechlorination. In this study, Pd-anchored Ni(OH)2/Ni-foam bifunctional electrodes were prepared in situ and for the first time applied in the reductive dechlorination of COCs. The results indicate that the dechlorination efficiency of 2,4-D can be enhanced on Pd-anchored Ni(OH)2/Ni-foam bifunctional electrodes even at a low Pd loading (<2 mg cm−2). A synergistic effect is found for 2,4-D dechlorination: H* formation on Ni(OH)2 and dechlorination steps on Pd. The enhanced dechlorination efficiency might be related to the shortened transport route between Ni(OH)2 and Pd active centers for H*.
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CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Mingyao Yuan,Yefan Wu,Zhilin Li,Zhenxing Zeng,Hong Peng,Hong Xiao,Xiaohui Lu,Yanzong Zhang,Shihuai Deng,Guochun Lv,Xiaojing Wang
Faced with the challenges of water pollution caused by the abuse of antibiotics, the comparably efficient degradation for diverse antibiotics was achieved through an elastic complementarity among SO 4 • − , •OH and 1 O 2 in a layered double hydroxides (LDH) + peroxymonosulfate (PMS) system. The catalytic system was able to maintain excellent performance even in the complicated water environment. The activation process was realized by transferring electrons from Co and Fe sites to the antibonding orbit of the O–O bond in the adsorbed HSO 5 − . Co sites might dominate by virtue of a stronger adsorption energy. Furthermore, the activation performance was probably enhanced by the charge transfer between the Co and Fe sites. Notably, the potential intermediates’ significantly lower biotoxicity may make it easier to process conventional treatment methods further during the practical applications. The objective of this study was to enrich the mechanistic knowledge of PMS activation at the micro level and provide a promising alternative for the reduction of refractory organic contaminants in water.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 131
·期 17
·
IF 1.64
Qianqian Zhai,Shigui Zhao,Chuanjian Zhou,Wenjie Li,Cun Peng
To verify the feasibility of the determination of the Si H content (HC) of hydrogen silicone oil (HS-oil) with Fourier transform near infrared (FT-NIR) spectroscopy and attenuated total reflectance (ATR)–Fourier transform infrared (FTIR) spectroscopy combined with the partial least squares regression (PLS-R) model, HS-oil samples were synthesized from concentrated hydrosilicone oil (HC = 1.4 wt %), octamethylcyclotetrasiloxane, and hexamethyldisiloxane or prepared by the dilution of concentrated hydrosilicone oil with octamethylcyclotetrasiloxane. The FT-NIR PLS-R model (8695–4000 cm −1 , two principal components) was developed from the FT-NIR spectral data, and the coefficient of determination for cross-validation ( R 2 ) and the coefficient of determination for external validation ( r 2 ) were 0.992 and 0.995, respectively. The ATR–FTIR PLS-R model (2302–2040 cm −1 , one principal component) was developed from the ATR–FTIR spectral data; it produced an R 2 of 0.995 and an r 2 of 0.996. This study demonstrated that the combination of FT-NIR and ATR–FTIR spectroscopy with the PLS-R model were successfully used to determine the HC of the HS-oil. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40694.
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TALANTA
·
2013
·
IF 3.498
Zhiwei Sun,Xiaoxiang Wang,Yiping Cai,Junqing Fu,Jinmao You
A new pair of derivatization reagents, d 0 -4-(1-methyl-1 H -phenanthro[9,10- d ]imidazol-2-yl)phenlamine (d 0 -MPIA) and d 3 -4-(1-methyl-1 H -phenanthro[9,10- d ]imidazol-2-yl)phenlamine (d 3 -MPIA) have been designed and synthesized. It was successfully used to label aliphatic aldehydes and the aldehyde derivatives were analyzed by high-performance liquid chromatography–tandem mass spectrometry (HPLC–MS/MS). The new isotope-coded reagents could easily label aldehydes under acidic conditions in the presence of NaCNBH 3 . The target derivatives exhibited intense [M+H] + and regular product ions with electrospray ionization source in positive mode. The d 0 /d 3 -MPIA-aldehydes were monitored by the transitions of [M+H] + → m/z 322 and [M+H] + → m/z 165, and the obtained detection limits were in the range of 0.18–15.9 pg/mL at signal to noise ratio of 3. The global isotope internal standard technology was employed for quantification analysis with d 3 -MPIA-aldehyde as internal standard for corresponding d 0 -MPIA-aldehyde. Excellent linear responses for relative quantification were observed in the range of 1/10–10/1 with coefficients >0.998. The developed method has been applied to the quantification of aliphatic aldehydes in selected aquatic products with RSD<3.6% and recoveries >85.2%.
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Horticulturae
·
2025
·Vol. 11
·期 11
·1292
·
IF 3
Hu Zhao,Xiaopu Shi,Zilu Zhao,Juan Wang,Baul Ko,Jong Hyang Bae,Yang Gyu Ku,Ho Cheol Kim,Chul Min Kim
Young leaves and sprouts ofToona sinensisare widely consumed throughout Asia. However, they are highly perishable, resulting in a short shelf life and limited marketability. Low-temperature storage can extend shelf life but is energy-intensive, restricting large-scale use. Salicylic acid (SA) exhibits preservative properties, representing a promising alternative. In this study, we investigated the effects of 250 μmol SA treatment on postharvestT. sinensisbuds and leaves stored at 20 °C for 7 days and compared it to low-temperature storage (4 °C). SA treatment delayed wilting, reduced water loss, suppressed total soluble solid accumulation, and inhibited active oxygen free radical and malondialdehyde production compared to the untreated controls at room temperature while outperforming low-temperature storage. The treated buds also maintained higher antioxidant enzyme activity and preserved non-enzymatic antioxidant compounds, including ascorbic acid, polyphenols, and flavonoids. Although total amino acid content steadily increased under SA treatment, individual amino acids greatly fluctuated. SA treatment reduced nitrate reductase and glutamate dehydrogenase activities, as well as NO2•−levels, indicating its effects on nitrogen metabolism. Our findings indicate that SA improves the postharvest quality ofT. sinensisbuds during room-temperature storage, providing a theoretical basis for applying SA as a storage agent forT. sinensisbuds.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Jianing Li,Tao Zhang,Huixia Ma,Boning Zhang,Yan Qiao,Ying Zhang
Electronic control of nanoparticle active sites via a single-atom promoter remains challenging in heterogeneous catalysis. Here we show that spatial positioning of single-atom Zr promoters on hydroxyapatite, either surface-decorated or near-surface lattice-incorporated, possesses different electronic modulation mechanisms. Characterizations and DFT indicate that surface-decorated Zr exhibits limited electron donation to the metal while minimally perturbing the support electronic structure. Lattice-incorporated Zr induces directional charge reconstruction accompanied by support-promoter-metal electronic coupling, thereby enabling significant tuning of the electronic structure of the metal nanoparticles. In 1,2-propanediol dehydrogenation to hydroxyacetone, the lattice-incorporated architecture delivers 83% yield, and 100 h stability under optimized conditions. The same spatial-positioning principle extends beyond Cu and is reproduced in Ni/Zr-HAP and Pt/Zr-HAP. Lattice-incorporated Pt also steers cyclohexanol conversion toward deep ring dehydrogenation, enhancing phenol formation while suppressing dehydration by-products. Overall, axial promoter placement is a transferable lever to engineer interfacial charge distribution for efficient dehydrogenation.
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High Voltage
·
2026
·Vol. 11
·期 1
·179-191
·
IF 5.7
Yalin Zhao,Shen Zhao,Zhicong Miao,Yunqi Xing,Hongkun Wang,Rongjin Huang,Guangtong Ma
Boron nitride (BN), characterised by its wide band gap and robust dielectric properties, has emerged as a promising filler for polymer-based dielectric composites. Nevertheless, its practical implementation in polymer matrices has been hindered by poor dispersibility and inadequate interfacial adhesion. This study addresses these challenges by developing hyperbranched polymer (HBP)-functionalised BN (HBP-BN) and fabricating HBP-BN/cellulose nanofiber (CNF) composite films via vacuum-assisted self-assembly. The HBP-BN/CNF films demonstrate a low dielectric loss (tan δ < 0.016) and significantly improved volume resistivity (10 9 Ω·m) and high thermal stability (55.36% residual mass at 800°C). Notably, the surface flashover voltage is elevated from 13.82 to 15.61 kV, demonstrating superior insulation capability. All these results highlight the promising potential of HBP-BN/CNF composite films for use as advanced dielectric materials, providing a novel approach to develop eco-friendly high-performance materials for high-voltage insulation systems in next-generation electronics and electrical devices.
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