NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 27
·12081-12090
·
IF 3.591
Meihuan Kang,Yichen Li,Jin Yan,Penghui Shi,Yulin Min,Jinchen Fan,Qunjie Xu
Titanium dioxide (TiO2) has been widely studied because of its stable chemical properties, low cost and non-toxicity. But some of its shortcomings also limit its development, such as a large band gap and weak catalytic ability under visible light. The photocatalytic performance of titanium dioxide has been improved by doping nonmetal boron (B) and noble metal rhodium (Rh) in the current study. In general, a metal's electron-deficient state can be regarded as the active sites in a hydrogen evolution reaction. The electron-deficient state of Rhδ+ contributes to its high ability to grab electrons. The light absorption range of Rh nanoparticles (NPs) can reach the visible light band. TiO2 with special morphology is synthesized by a one-step hydrothermal method, and B-doped titanium dioxide with an oxygen vacancy is obtained by adding a B source into the precursor solution. The influence of nonmetal ion doping on oxygen vacancy is studied. The Rh/B–TiO2-550 photocatalyst is synthesized by depositing Rh NPs onto B–TiO2, and the bifunctional photocatalyst with a visible light response is successfully prepared. The Rh/B–TiO2-550 catalyst shows good performance in the degradation of hydrogen and pollutants produced in the photocatalytic decomposition process. Under the irradiation of a 300 W xenon lamp, the hydrogen production reaches 108.67 μmol in 3 h, and the degradation effect of OPP reaches 99.48%.
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Frontiers in Chemistry
·
2022
·
IF 5.545
Yin Zhen-Hua,Liu Xiao-Peng,Wang Jin-Mei,Xi Xue-Feng,Zhang Yan,Zhao Rui-Lin,Kang Wen-Yi
Pleurotus placentodes, a fungus, belongs to the Pleurotaceae family. The aim of the present study was to characterize the structure of a novel polysaccharide from fruiting bodies of P. placentodes (PPp-W) and evaluate its anticoagulant activity in vitro. The high-performance liquid chromatography and GC–MS analysis indicated that PPp-W with a molecular weight of 27.4 kDa was mainly composed of mannose (17.56%), glucose (6.37%), galactose (44.89%), and fucose (1.22%) with a certain amount of 3-O-methyled galactose. SEM, XRD, and AFM combined with Congo red test revealed that PPp-W was an irregular curly sheet with triple-helix conformation. The FT-IR, methylation, and nuclear magnetic resonance analysis indicated that PPp-W contained→6)-α-D-Galp-(1→, →6)-3-O-Me-α-D-Galp-(1→and →2, 6)-α-D-Galp-(1→ as main chain, partially substituted at O-2 and O-6 by non-reducing ends of β-D-Manp-(1→ and β-L-Fucp-(1→ with a small amount of α-1,3-linked-Glcp in backbone. PPp-W could significantly prolong APTT (12.9 ± 0.42 s, p < 0.001) and thrombin time (39.9 ± 0.28 s, p < 0.01) compared with the control group (11.45 ± 0.071 s and 38.05 ± 0.21 s), which showed that PPp-W had anticoagulant activity. These studies suggested that PPp-W was a 3-O-methylated heteroglycan and might be suitable for functional foods and natural drugs as an anticoagulant ingredient, which provided a basis for the application of polysaccharides from P. placentodes.
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JOM
·
2019
·Vol. 72
·期 12
·4288-4295
·
IF 2.305
Zhang Jia-Wei,Li Ying,Ding Yu-Shi,Pan Ke-Feng,Zhao Qing
Poly( o -phenylenediamine) was synthesized in different inorganic acid media, hydrochloric (HCl), nitric (HNO 3 ), and phosphoric acid (H 3 PO 4 ).
The aim was to investigate the protective effect of doped coatings on mild steel in an aggressive environment. The synthesized doped-PoPD products were characterized by x-ray diffractometry, Fourier transform infrared spectroscopy, scanning electron microscopy, and cyclic voltammetry. The inhibition abilities of doped coatings were evaluated by potentiodynamic polarization measurements and electrochemical impedance spectroscopy in 3.5% NaCl solution. In the present article, the lowest corrosion current and highest protection efficiency of the doped polymer were observed for the polymer synthesized in HNO 3 medium. The results showed that good protection of mild steel can be achieved by PoPD coating doped with inorganic acid in 3.5% NaCl solution.
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ACS Applied Polymer Materials
·
2022
·
IF 4.855
Yue Yao,Baolong Wang,Feng Zhao,Zhen Hu,Yudong Huang
The extensive use of unsaturated polyester resins and their composites has resulted in an increasingly aggravating problem of waste materials which are difficult to remold or degrade endowed by their highly crosslinked network. A simple and facile recovery method to fully degrade resins remains challenging so far. Here, a hindered C–O bond with a carbonyl group in the β-position of steric ester was introduced into the design and preparation of a dimethacrylate monomer and its self-polymerized unsaturated polyester resin. The obtained resin with good thermal, mechanical, and solvent-resistance properties could be efficiently degraded within 3.5 h at 90 °C at an 80% concentration of aqueous hydrazine hydrate. Selective cleavage of the hindered bond due to steric and electronic effects was activated by the prior addition of the introduced carbonyl group. Degradation products rich in benzene and carboxyl/carboxylate groups respectively could be separated readily according to the water solubility, being expected to be reused as a flocculant and other functional additives. This work provides a promising strategy for the facile recycling of unsaturated polyester resins.
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ChemistrySelect
·
2023
·Vol. 8
·期 40
·e202303078
·
IF 2.1
Yixin Tong,E. Mi,Li Zhou,Xiabin Wang,Biao Xiong
Graphical The synthesis of 2-acylindoles from sulfoxonium ylides with o-aminoaryl aldehydes via iridium-catalyzed N−H insertion and intramolecular condensation has been demonstrated. 2-Acylindoles possess widespread applications in functional chemicals. However, the convenient and selective synthesis of such important substructures has to date remained a challenge. Herein, a method to achieve 2-acylindoles from sulfoxonium ylides with o-aminoaryl aldehydes catalysed by Iridium has been developed with the merits of broad substrate scope, good functional tolerance, high efficiency and operational simplicity, which provides an alternative way to access functionalized indoles.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Huanhuan Li,Chang Liu,Xin Wang,Jiangchao Wang,Ping Li,Gaozhan Xie,Yunbo Jiang,Runfeng Chen,Ye Tao
Developing high-performance host materials is one of the biggest challenges for blue and white thermally activated delayed-fluorescence (TADF) organic light-emitting diode (OLED) technology due to the rigorous requirements of both efficient carrier flux ability and high triplet energy (ET) levels in static donor–acceptor molecules. Here, with the aid of a dual-resonance strategy, a host molecule showing dynamic adaption features in the acceptor–resonance–donor–resonance–acceptor (A–r–D–r–A) molecular configuration has been successfully developed through the implantation of two acceptors of diphenylphosphine oxide into electron-donating 5,10-dihydrophenazine with N–P═O resonance linkages. Owing to the dual enantiotropic N+═P–O– resonances, the designed A–r–D–r–A molecule exhibits an extraordinarily balanced charge flux transportation attribute at high ET (2.96 eV). Excitingly, blue and warm-white TADF OLEDs hosted by the A–r–D–r–A molecule exhibit outstanding external quantum efficiencies of 14.7 and 20.3%, respectively. Our studies not only broaden the scope of resonance molecules but also indicate that a resonance structure is an effective linkage to develop optoelectronic materials with dynamically adaptive properties.
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FUEL PROCESSING TECHNOLOGY
·
2019
·
IF 4.507
Xiaoping Wu,Qiao Zhang,Lungang Chen,Qiying Liu,Xinghua Zhang,Qi Zhang,Longlong Ma,Chenguang Wang
The development of thermally stable Pt-based catalysts with superior performance for propane dehydrogenation reactions remains a daunting challenge. In this study, a series of PtSn-Mg(Zn)AlO catalysts with different Zn and Pt contents were synthesized by the anion-exchange method for the propane dehydrogenation reaction. To investigate the influence of Zn on the reaction performance and the catalyst structure, the prepared catalysts were characterized with several analytical techniques, including XRD , TEM, HRTEM, H 2 -TPD and CO pulse chemisorption . A good propane conversion (initially higher than 55% and averaging 45.2% over a period of 2 h) and propene selectivity (higher than 99%) were obtained experimentally with PtSn-Mg(3Zn)AlO at 550 °C. The results demonstrated that Pt provided the active sites and that Zn was a promoter. The HRTEM and CO pulse chemisorption results indicated that the addition of Zn to the PtSn-MgAlO catalyst can stabilize the dispersion of metal particles and thus inhibit the sintering of Pt particles. Furthermore, the activities of the used catalysts were almost recovered through reaction-regeneration cycles with the burning-off of coke during five cycles.
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Water
·
2025
·Vol. 17
·期 17
·2505
·
IF 3
Siqi Tong,Guangbing Liu,Xi Meng,Chunkai Huang,Siwen Chen,Zhiquan Xiang,Weijing Liu,Jinyou Shen,Yi Wang
With increasing wastewater treatment demands and decarbonization goals, synergistic reduction in pollutants and green house gas (GHG) emissions is crucial. High process emissions like N2O pose significant challenges, yet optimized carbon reduction strategies for conventional plants are lacking. This study developed three mathematical models to quantify the impact of dissolved oxygen (DO), influent salinity, and C/N ratio on direct emissions (CH4, N2O) and indirect emissions. Response Surface Methodology (RSM) optimized these factors to minimize GHG emissions under three accounting scenarios: (1) plants with CH4reuse systems: salinity = 0.5 g L−1, DO = 3.67 mg L−1, C/N = 12.75; (2) plants focusing solely on direct emissions: salinity = 0.5 g L−1, DO = 3.35 mg L−1, C/N = 3; and (3) plants assessing total emissions: salinity = 0.5 g L−1, DO = 2.5 mg L−1, C/N = 7.18. Key findings indicated that increasing salinity exacerbated greenhouse gas emissions. Elevated DO levels in the aerobic stage reduced N2O emissions but increased indirect emissions in the A2/O process. Higher C/N ratios promoted anaerobic CH4production, but sufficient carbon reduced N2O by enabling complete heterotrophic denitrification. A 60−day continuous GHG emissions monitoring campaign was conducted at a WWTP to validate the actual emission reductions achievable under the identified optimal control conditions. An analysis and comparison of operational and economic costs were also performed. The findings provide practical insights into sustainable GHG emission management and offer potential solutions to advance the synergistic reduction in GHG emissions and pollutants.
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JOURNAL OF MEDICINAL CHEMISTRY
·
2025
·
IF 6.8
Wenchen Pu,Xianyan Shen,Xin Fan,Yuanyuan Zheng,Xuesha Liu,Jiao Li,Jian-Kang Zhou,Juan He,Rong Wei,Yanqiu Gong,Qingquan Zheng,Yao Luo,Yingli Guo,Min Ai,Yue Ming,Zixia Ye,Yun Zhao,Chun Wang,Yong Peng
Hepatocellular carcinoma (HCC) is a major cause of cancer-related deaths globally, and the need for effective systemic therapies for HCC is urgent. Our previous work reveals that Pin1 is a potential anti-HCC target, which regulates miRNA biogenesis and identifies API-1 as a novel Pin1 inhibitor to suppresses HCC. However, a great demand in HCC therapy as well as the limited chemical stability and pharmacokinetic feature of API-1 motivated us to find improved Pin1 inhibitors. Herein, we designed and synthesized diverse 6-O-benzylguanine derivatives and discovered API-32 as a novel Pin1 inhibitor with better stability and pharmacokinetic property over API-1. API-32 directly interacted with the Pin1 PPIase domain to inhibit Pin1 activity. API-32 significantly suppressed the cell proliferation and migration of HCC cells by blocking Pin1’s downstream signal. Moreover, API-32 exhibited an enhanced inhibitory function against the HCC tumor in mice models without obvious toxicity, making it a promising drug candidate for HCC treatment.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Mingjing Ma,Huanhuan Yu,Baolin Zhu,Wenjun Zheng,Shoumin Zhang
The design of efficient catalysts with atom clusters (ACs) and single atoms (SAs) as active sites for water splitting presents an effective approach for improving bifunctional electrocatalytic performance by synergistically promoting electron transport and proton transfer kinetics. In this work, a series of Fe2O3-supported noble metal catalysts (M = Ru, Rh, Pd, Ag) incorporating both ACs and SAs sites were developed, with detailed characterization identifying Ru ACs as the primary active centers. The designed-interfacial M-O-Fe bonds play a critical role in charge redistribution, subsequently enhancing electron and proton transfer kinetics. The resulting heterostructure optimizes both the electronic environment and active site accessibility, yielding exceptional electrocatalytic performance. Further density functional theory calculations demonstrate that the incorporation of Ru species leads to increased filling of antibonding orbitals and modulation of the d-band center, subsequently reducing the energy barrier of the rate-determining steps to −0.267 eV for HER and 1.522 eV for OER, respectively. Consequently, the representative Ru/Fe2O3 with Ru content of 1.1 wt.% achieves an OER overpotential of 189 mV and a HER overpotential of 21 mV at a current density of 10 mA cm−2. This study highlights a novel approach to the design of advanced bifunctional electrocatalysts by engineering interfacial bridge bonds.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yunxiao Zheng,Xiaohui Wu,Yongchun Zhao,Tao Zhou,Mingjie Huang
Polymerization transfer (PT) technology is highly advantageous for treating high-salinity wastewater due to its high tolerance to coexisting anions and superior electron utilization efficiency. Here, we report the unusual simultaneous achievement of rapid pollutant removal (pseudo-first-order rate constant of 0.15 min −1 , 56.0-fold higher than unmodified counterparts) and high PT ratio (>65 %) in a peroxymonosulfate (PMS) activation system. This was achieved by simply tuning the Fe content within a rationally designed Fe/N engineered pine sawdust biochar catalyst. Performance enhancement stems from Fe-induced graphitization improving electron transfer, coupled with N-induced moderate orbital hybridization between Fe 3 d (Fe/N biochar) and O 2 p (PMS) atomic states, optimizing PMS adsorption-desorption and yielding the lowest energy barrier for Fe(IV) O formation. Remarkably, the system maintains robust performance under high salinity conditions (500 mM Cl − , HCO 3 − , NO 3 − , and SO 4 2− ) and achieves 67.5–77.3 % chemical oxygen demand (COD) removal during 17-day continuous-flow treatment of real coking wastewater, where polymerization-mediated organic removal through C C/C O coupling. Furthermore, residual oligomers are efficiently removed by subsequent activated carbon (AC) adsorption or poly-ferric sulfate (PFS) coagulation, establishing an integrated “catalytic polymerization-AC/PFS polishing” paradigm for sustainable treatment of refractory organics in high salinity coking wastewater.
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JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Yunkai Sun,Qingqing Song,Meng Cao,Chunhong Tan,Xiao-Feng Wang,Kejie Du,Yuheng Zhang,Yi Ding,Xiaoqiang Xue
Metal-organic complexes, particularly copper complexes, are emerging as promising candidates for anticancer drug due to their versatile redox states. Two copper complexes ( complex1 and complex2 ) have been designed based on the ligands for 1,10-phenanthroline (phen), 4,5-diazofluoren-9-one (DAFO) and 1,4-terephthalic acid (1,4-BDC), and the structures have been determined by X-ray single crystal analysis. The interactions of the complexes with calf thymus DNA (CT-DNA) have been investigated using UV-vis absorption and viscosity measurements. The results indicate that the complex 1 and complex 2 respectively bind to CT-DNA, and the binding mode of the former is in electrostatic binding or groove mode, while that of the latter is in insertion mode. The complex 2 had better activity to break CT-DNA than complex 1 .
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