INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
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IF 3.375
Junjie Zhu,Linbo Wu,Zhiyang Bu,Suyun Jie,Bo-Geng Li
Searching for highly efficient and robust CO2 adsorbents is very important for CO2 capture, utilization, and storage. In this study, new polyethylenimine-grafted metal–organic framework (MOF)–polymer composites, abbreviated as PEI@PGD-H, were synthesized via high internal phase emulsion (HIPE) template polymerization of divinylbenzene and glycidyl methacrylate, followed by in situ generation of HKUST-type MOF in the presence of hydrophobic-modified CuO nanoparticles via the reaction of CuO with 1,3,5-benzenetricarboxylic acid and then polyethylenimine (PEI) functionalization via epoxy–amine reaction and amine–metal sites interaction. The coexistence of the hierarchical interconnected porous skeleton of poly(glycidyl methacrylate–divinylbenzene) (PGD), high specific surface area of MOF, and chemical CO2 adsorption of PEI endows PEI@PGD-H with high CO2 adsorption capacity, rate, and selectivity. PEI70@PGD-H shows a CO2/N2 separation factor as high as 76 and CO2 adsorption capacities of 4.3, 3.0, and 1.8 mmol of CO2/g from pure CO2, simulated flue gas, and air, respectively. After 20 CO2 adsorption–desorption cycles, the adsorbent still retained a high and stable CO2 capture capacity over 2.8 mmol of CO2/g for simulated flue gas. The adsorbent also displays reasonably good thermal stability, excellent water endurance, low desorption energy, and easy shaping. The desorption heat is as low as 48 kJ/mol of CO2. These features make PEI@PGD-H highly efficient, robust, and low-energy CO2 adsorbents for practical application in CO2 capture.
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JOURNAL OF HAZARDOUS MATERIALS
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2018
·
IF 6.434
Jing Zhang,Juncong Li,Huiyu Su,Ying Zhao,Xiang Zeng,Maohua Hu,Wei Xiao,Xuhui Mao
In this study, the effect of oxyanions on the photodegradation of sulfonamides by graphitic carbon nitride (g-C 3 N 4 ) was investigated. The results showed that the presence of disilicate (DS) could substantially improve the photodegradation of sulfamethazine (SMZ) in g-C 3 N 4 aqueous suspension. The primary mechanism for the enhancing effect of DS was hydrogen bonding (H-bonding) interaction. The hydroxyl groups ( OH) and bridging oxygen (Si O Si) of DS can form H-bonds with the amine groups of g-C 3 N 4 particles and sulfonamides, therefore soluble DS can act as a bridge to enhance the transfer and adsorption of SMZ onto the surface of g-C 3 N 4 particles. The presence of DS did not change the mechanism of photodegradation, but there was an optimal concentration for DS to achieve the strongest enhancing effect. H-bonding effect was also found for other oxyanions derived from weak acids, such as silicate, dihydrogen phosphate and borate ions, because the partial ionization of these oxyanions allowed the existence of hydroxyl groups to form H-bonds. The present study not only deepens our understanding of the interface process of the photodegradation of sulfonamides in g-C 3 N 4 aqueous suspension, but also provides a potential method to enhance the photocatalytic degradation of antibiotics in wastewater streams.
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高影响因子
ACS Applied Materials & Interfaces
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2019
·
IF 8.456
Haiyan Qiao,Pengfei Qi,Xiaohui Zhang,Linan Wang,Yeqiang Tan,Zhaohui Luan,Yanzhi Xia,Yanhui Li,Kunyan Sui
Herein, we demonstrate a ternary ionic hydrogel sensor consisting of tannic acid, sodium alginate, and covalent cross-linked polyacrylamide as skin-mountable and wearable sensors. Based on the multiple weak H-bonds and synergistic effects between the three components, the as-prepared hybrid hydrogel exhibits ultrastretchability with high elasticity, good self-healing, excellent conformability, and high self-adhesiveness to diverse substrates both in air and underwater. More importantly, the ternary hydrogel exhibits high strain sensitivity especially under subtle strains with a gauge factor of 2.0, which is close to the theoretical value of the ionic hydrogel sensors; an extremely large workable range of strain (0.05–2100%); and a low operating voltage 0.07 V. Consequently, the sensor demonstrates superior sensing performance for real-time monitoring of the large and subtle human motions, including limb motions, swallowing, smiling, and wrist pulse. Therefore, it is believed that the STP hydrogel has great potential applications in health monitoring, smart wearable devices, and soft robots.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Tingwei Zhang,Yijuan Lu,Wenzhi Li,Mingxue Su,Tao Yang,Ajibola Ogunbiyi,Yongcan Jin
In order to efficiently produce γ-valerolactone (GVL) from furfural , a Zr-graphitic carbon nitride/H-β composite (Zr CN/H-β) had been simply prepared via an impregnation-calcination protocol. The morphology and structure, elemental information, and total acid and base properties of the Zr CN/H-β and related catalysts (H-β, CN/H-β, and Zr/H-β) were determined by SEM, TEM , X-ray photoelectron spectroscopy (XPS), and temperature-programmed desorption (TPD-NH 3 , CO 2 ) characterizations. The effects of reaction temperature and time, and the furfural dosage on GVL production as well as the recyclability of Zr CN/H-β were investigated. With a catalyst/furfural dosage of 0.1/0.22 g, the Zr CN/H-β produced a remarkable 76.5% of GVL yield at 160 °C in 18 h using isopropanol as the solvent. The results of NH 3 , CO 2 -TPD experiments indicated that the simultaneous introduction of Zr species and carbon nitride onto H-β formed new types of acid and base, which should be responsible for the high efficient conversion of furfural to GVL. Additionally, the recyclability of Zr CN/H-β was reasonable.
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RSC Advances
·
2018
·Vol. 8
·期 31
·17389-17398
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IF 2.936
Yunquan Zheng,Qisheng Pan,Liuda Mo,Wenyi Zhang,Yunjian Duan,Chengqun Chen,Haijun Chen,Yanghao Guo,Xianai Shi,Jianmin Yang
Alzheimer's disease (AD) is an extremely complex disease, characterized by several pathological features including oxidative stress and amyloid-β (Aβ) aggregation. Blockage of Aβ-induced injury has emerged as a potential therapeutic approach for AD. Our previous efforts resulted in the discovery of Monascus pigment rubropunctatin derivative FZU-H with potential neuroprotective effects. This novel lead compound significantly diminishes toxicity induced by Aβ(1-42) in Neuro-2A cells. Our further mechanism investigation revealed that FZU-H inhibited Aβ(1-42)-induced caspase-3 protein activation and the loss of mitochondrial membrane potential. In addition, treatment of FZU-H was proven to attenuate Aβ(1-42)-induced cell redox imbalance and Tau hyperphosphorylation which caused by okadaic acid in Neuro-2A cells. These results indicated that FZU-H shows promising neuroprotective effects for AD.
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高影响因子
Frontiers in Chemistry
·
2018
·
IF 4.155
She Houde,Li Liangshan,Zhou Hua,Wang Lei,Huang Jingwei,Wang Qizhao
Selective activation of saturated C–H bond in hydrocarbons to produce high-value-added chemicals is of great significance for chemical synthesis and transformation. Herein, we present a facile procedure to achieve Ni-doped CdS nanoparticles with mixed (cubic and hexagonal) phases, as well as its application to the photocatalytic activation of saturated primary C–H bond of toluene and its derivatives. The photocatalytic oxidation rate of toluene into benzaldehyde of formation reached up to 216.7 μmolh−1g−1 under visible light irradiation. The excellent photocatalytic performance of Ni(II)-doped CdS [Ni(II)/CdS] can be attributed to its unique structural assembly with cubic and hexagonal phases and also the addition of Ni ions, together taking effect in promoting the separation of photogenerated charge carriers. The possible reaction mechanism for the photocatalytic selective oxidation is illustrated in this work. The band width of the as-prepared mixed phase CdS is reduced, which can effectively expand the response range and improve photocatalytic performance.
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高影响因子
Nanoscale
·
2023
·Vol. 15
·期 7
·3199-3211
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IF 6.7
Feng-Rui Wang,Xiao-Xiao Sheng,Min Zhang,Min Miao,Jin-Ku Liu,Ji-Chang Liu,Yun-Sheng Ma,Peng-Peng Liu
Zinc molybdate (ZMO) is a safe and effective grafting material for anticorrosion. Herein, we reported the synthesis of ZMO/h-BN with the labyrinth of capillary pores owing to the in situ growth of ZMO on flake hexagonal boron nitride (h-BN) using the hydrothermal method. The special morphological structure provided a tortuous path for aggressive species to the steel substrate, which extended and blocked the transmission of aggressive species, enhancing the physical corrosion barrier performance. In addition, the capillary pores of ZMO contributed to the competitive adsorption of Cl− in an electrolyte and reduced the diffusion of aggressive species, thus further delaying the corrosion process. Moreover, the capture of oxygen by forming a B–O bond with h-BN and the formation of a molybdate passive film are beneficial for the inhibition of cathodic and anodic reactions. As verified by electrochemical impedance spectroscopy (EIS), the anticorrosion performance of ZMO/h-BN coating increased by 49.58% and 130.72% compared with ZMO and epoxy resin (EP) coatings after immersing in a NaCl aqueous solution (3.50 wt%) for 72 h. This coating matrix provides an avenue for molybdate-based corrosion remediation.
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NANO
·
2022
·
IF 1.438
X. Du,L. Wang,Q. Xia,Q. Hu,A. Zhou
For lithium-ion batteries (LIBs) with high energy density, it is critical to develop reliable and high-capacity anode materials. In this work, d-Ti 3 C 2 T x /h-BN hybrid layered nanocomposites with uniform distribution are synthesized using a simple liquid phase blending method and investigated as an anode material for LIBs. The results reveal that the uniformly dispersed h-BN anchored on the d-Ti 3 C 2 T x nanosheets can effectively prevent the d-Ti 3 C 2 T x nanosheets from restacking during charging and discharging processes, as well as improve the electronic conductivity. The studies show that the electrochemical performance, such as the capacity and cyclic stability, of d-Ti 3 C 2 T x /h-BN electrode is better than that of pure d-Ti 3 C 2 T x materials.
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ENERGY & FUELS
·
2022
·
IF 4.654
Xianqiang Huang,Yanan Cui,Gang Liu,Haitao Wang,Junyu Ren,Yalin Zhang,Guodong Shen,Lingling Lv,Huai-Wei Wang,Yi-Fa Chen
With the arising concern of environmental problems, the removal of polycyclic aromatic hydrocarbons or sulfides in fuel oils is an indispensable process to achieve a clean energy source. At present, direct catalytic oxidation of benzyl C–H bonds of polycyclic aromatic hydrocarbons and sulfides to corresponding carbonyl compounds is very attractive, yet their simultaneous oxidation using a single economical-friendly catalyst is not yet well established. Here, three imidazole-decorated copper polyoxomolybdate frameworks (Im-Cu-PMoFs) are successfully synthesized by tuning different imidazole derivatives. These Im-Cu-PMoFs can serve as effective heterogeneous catalysts for the one-pot oxidation of benzylic hydrocarbons and sulfides to produce carbonyl compounds. Specifically, Im-Cu-PMoFs-3 as a single component catalyst exhibits high activity and prominent selectivity (conversion up to 99% and selectivity up to 99%) in the one-pot reaction. In addition, the possible reaction pathway and active sites are supported by sufficient characterizations and DFT calculations, which reveal the synergistic effect of Mo(VI) and Cu(II) centers in the one-pot catalysis reaction. These dual function-validated frameworks hold much promise in the exploration of novel catalysts for applications like continuous catalytic or flow bed reaction.
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 13
·6274-6282
·
IF 3.925
Xiu Xing,Yan Liu,Ming-Liang Shi,Kun Li,Xin-Yue Fan,Zhong-Liu Wu,Na Wang,Xiao-Qi Yu
Controllable and mild photoenzymatic production of chiral alcohols was realized by coupling a versatile photochemical NAD(P)H regeneration system with (R)- or (S)-selective ketoreductases. The efficiency of NAD(P)H regeneration was improved using a Rhodium functionalized metal organic framework, namely Rh-UiO-67, to adjust and control electron transport and electron utilization. Furthermore, six different ketoreductases could be successfully immobilized on Rh-UiO-67 and combined with the light-driven NAD(P)H regeneration system to produce chiral aryl alcohols. Various chiral alcohols with complementary (R)- and (S)-conformations can be constructed by this method with high yields (97%) and excellent stereoselectivity (>99% ee).
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FASEB JOURNAL
·
2022
·Vol. 36
·期 10
·e22530
·
IF 5.834
Chengyu Yang,Yang Liu,Ziyan Wang,Minmin Lin,Chao Liu
Despite the best treatment, approximately 10% of fractures still face undesirable repair and result in delayed unions or non-unions. Dynamic mechanical stimulation promotes bone formation, when applied at the correct time frame, with optimal loading magnitude, frequency, and repetition. Controlled mechanical loading significantly increases osteogenic cells during the matrix deposition phase of bone repair. In the bone defect, the blood vessel network guides the initial bone formation activities. A unique blood vessel subtype (Type H) exists in bone, which expresses high levels of CD31 and endomucin, and functions to couple angiogenesis and osteogenesis. However, how this form of controlled mechanical loading regulates the Type H vessels and promotes bone formation is still not clear. Sphingosine 1-phosphate (S1P) participates in the bone anabolic process and is a key regulator of the blood vessel. Its receptor, sphingosine 1-phosphate receptor 1 (S1Pr1), is a mechanosensitive protein that regulates vascular integrity. Therefore, we hypothesis that controlled anabolic mechanical loading promotes bone repair by acting on Type H vessels. To study the effect of S1Pr1 on loading induced-bone repair, we utilized a stabilized tibial defect model, which allows for the application of anabolic mechanical loading. Mechanical loading upregulated S1Pr1 within the entire defect, with up to 80% expressed in blood vessels, as observed by deep tissue imaging. Additionally, S1Pr1 antagonism by W146 inhibited the anabolic effects of mechanical loading. We showed that mechanical loading or activating S1Pr1 could induce YAP nuclear translocation, a key regulator in the cell's mechanical response, in endothelial cells (ECs) in vitro. Inhibition of S1Pr1 in endothelial cells by siRNA reduced loading-induced YAP nuclear translocation and expressions of angiogenic genes. In vivo, YAP nuclear translocation in Type H vessels was up-regulated after mechanical loading but was inhibited by antagonizing S1Pr1. S1Pr1 agonist, FTY720, increased bone volume and Type H vessel volume, similar to that of mechanical stimulation. In conclusion, controlled anabolic mechanical loading enhanced bone formation mainly through Type H vessels in a S1Pr1-dependent manner.
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zheng-Bai Zhao,Cheng Hu,Yang Wang,Hong-Min Cong,Yong Ma,Ding-Duo Lin,Wei-Li Li,Chao Yan
The solvent-based resins have been applied widely in the preparation of thermal interface material (TIM). However, the use of solvents is harmful to the environment and human health. To address this, an environment-friendly TIM is fabricated by employing waterborne epoxy as a polymer matrix in this research project. The waterborne epoxy resin/polyvinyl pyrrolidone/hexagonal boron nitride (WER/PVP/h-BN) composite is successfully prepared through a facile method. First, the WER/PVP/h-BN mixture is obtained by a one-pot process. Subsequently, the WER/PVP/h-BN composite is fabricated by heat curing. The thermal conductivity of obtained WER/PVP/h-BN composite can reach 1.0921 W/m·K at 40 wt% filler loading. The mechanism of PVP for thermal conductivity enhancement of composites is demonstrated utilizing effective medium theory (EMT) and Fogyel’s models. Furthermore, the mechanical, electrical, and surface properties of WER/PVP/h-BN composites are comprehensively investigated. The valuable information and insight for the design and preparation of environment-friendly TIMs are provided in this paper.
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危险品化学品经营许可证（带存储）