INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Zhige Zhang,Guican Bi,Jiawei Zhong,Jun Xie
Using green and sustainable biogas as raw material to produce syngas (H 2 /CO≈2) suitable for direct synthesis of green methanol has attracted wide attention, but developing efficient catalysts with high activity/stability remains a big challenge. A series of MgAl 2 O 4 spinel catalysts (denoted as Ni x Mg 1-x Al 2 O 4 ) is designed and applied in biogas bi-reforming. The nano Ni x Mg 1-x Al 2 O 4 catalysts were comprehensively characterized by Raman, SEM, HR-TEM, H 2 -TPR, CO 2 -TPD, etc. The CO 2 activation was verified by in situ CH 4 -TPSR/CO 2 -TPO, and the key role of Ni x Mg 1-x Al 2 O 4 in coke removal behavior mechanism was further confirmed. Due to the efficient CO 2 adsorption/activation and strong metal–support interaction, nano Ni x Mg 1-x Al 2 O 4 shows excellent catalytic stability to inhibit sintering and carbon deposition . At reforming conditions of 750 °C, a weight hourly space velocity (WHSV) of 32,400 mL g Cat −1 h −1 , the Ni 0.4 Mg 0.6 Al 2 O 4 catalyst exhibits excellent CH 4 /CO 2 conversion of 91/51 % are achieved, followed by slight decrease after 40 h, and remain basically stable for the next 40 h.
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Wei Yang,Yanhua Gao,Mingli Cao
The enhanced photocatalytic properties of Z-Scheme Bi@BiOCl/C3N4-DPY heterojunction materials were successfully prepared by the ultrasonic-assisted coprecipitation method. The Bi@BiOCl/C3N4-DPY heterojunction exhibited remarkable photocatalytic activity under visible light irradiation, and the degradation rate of methyl orange (MO) was about 90.6% in 180 min. This impressive efficiency is mainly due to the Z-Scheme charge transfer mechanism in Bi@BiOCl/C3N4-DPY, resulting in the efficient separation of charge carriers and an increase in the REDOX potential of photogenerated electrons and holes. C3N4 was modified with a π-deficient conjugated pyridine ring, which caused the light absorption redshift, promoted the formation of oxidizing •O2–, and improved the photocatalytic activity. At the same time, a well-aligned heterojunction is formed at the interface between C3N4-DPY and BiOCl, facilitating the seamless transfer of light-induced electrons from the LUMO of C3N4-DPY to the CB of BiOCl. In addition, the addition of Bi introduces a unique band gap reduction effect, resulting in a change in the density of the band states, which further promotes charge transfer and separation. It is worth noting that the introduction of metallic bismuth (Bi) brings about a unique band gap reduction effect, resulting in a change in the density of states within the band, which ultimately promotes charge transfer and separation. The Z-scheme charge migration inside Bi@BiOCl/C3N4-DPY further promotes the efficient separation of photogenerated electron–hole pairs, greatly improving the overall efficiency of the material. The Z-structured photocatalyst developed in this study has great application potential in various fields of photocatalysis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Shunfa Zhou,Guoli Zheng,Feng Ji,Jiatang Wang,Zhao Liu,Jiawei shi,Jing Li,Yang Hu,Chengwei Deng,Liyuan Fan,Weiwei Cai
Excellent porosity and accessibility are key requirements during carbon-based materials design for energy conversion applications. Herein, a Ni-based porous supramolecular framework with graphite-like morphology (Ni-SOF) was rationally designed as a carbon precursor. Ultrathin carbon nanosheets dispersed with Ni nanoparticles and Ni-N x sites (Ni@NiN x -N-C) were obtained via in-situ exfoliation during pyrolysis. Due to the hetero-porous structure succeeding from Ni-SOF, the Ni@NiN x -N-C catalyst showed outstanding bifunctional oxygen electrocatalytic activity with a narrow gap of 0.69 V between potential to deliver 10 mA cm −2 oxygen evolution and half-wave potential of oxygen reduction reaction, which even surpassed the Pt/C + IrO 2 pair. Therefore, the corresponding zinc-air battery exhibited excellent power output and stability. The multiple Ni-based active sites, the unique 2D structure with a high graphitization degree and large specific surface area synergistically contributed to the excellent bifunctional electrocatalytic activity of Ni@NiN x -N-C. This work provided a novel viewpoint for the development of carbon-based electrocatalyst.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-15
·
IF 16.6
Gao Jie,Wang Lei,Jiang Jing,Xu Qian,Zeng Nianyi,Lu Bingyun,Yuan Peibo,Sun Kai,Zhou Hongwei,He Xiaolong
Secreted proteins are one of the direct molecular mechanisms by which microbiota influence the host, thus constituting a promising field for drug discovery. Here, through bioinformatics-guided screening of the secretome of clinically established probiotics from Lactobacillus , we identify an uncharacterized secreted protein (named LPH here) that is shared by most of these probiotic strains (8/10) and demonstrate that it protects female mice from colitis in multiple models. Functional studies show that LPH is a bi-functional peptidoglycan hydrolase with both N-Acetyl-β-D-muramidase and DL-endopeptidase activities that can generate muramyl dipeptide (MDP), a NOD2 ligand. Different active site mutants of LPH in combination with Nod2 knockout female mice confirm that LPH exerts anti-colitis effects through MDP-NOD2 signaling. Furthermore, we validate that LPH can also exert protective effects on inflammation-associated colorectal cancer in female mice. Our study reports a probiotic enzyme that enhances NOD2 signaling in vivo in female mice and describes a molecular mechanism that may contribute to the effects of traditional Lactobacillus probiotics.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Xichan He,Keyong Tang,Xiumin Li,Fang Wang,Jie Liu,Fangfang Zou,Mengyuan Yang,Meixuan Li
Inspired by the mechanism of bone formation, a porous collagen-carboxymethyl cellulose/hydroxyapatite (Col-CMC/HA) composite was designed and fabricated using a biomimetic template of Col and CMC protein-polysaccharide bi-molecules. The morphology, composition and physical properties of Col-CMC/HA composites were characterized systematically. It was found that the nano-HA homogenously distributed on the surface of Col-CMC bi-templates while the composite presented 3D porous structure with pore size from 100 μm to 300 μm. The porosities of composites were located at the range of 71%–85%. Besides, the compressive strength of composites was highly depended on the ratio of Col to CMC in the organic template. The optimized composite in respect to physical properties showed a compressive strength as high as 7.06 MPa, quite close to that of natural bone. The high relative growth rate of wild-type mouse embryonic fibroblasts cells was found for the composite, indicating a good biocompatibility. The organic-inorganic composite also behaved good in collagenase resistance and could be biodegraded in 8 weeks, with about 50% of initial weight left at the ratio of Col to CMC of 1:9. The results demonstrated that the Col-CMC/HA composite by bi-molecular template method was a rational and safe method to prepare biomaterials with tunable properties.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER TESTING
·
2019
·
IF 2.943
Di Yang,Junkai Ren,Jiwei Li,Qinglin Wang,Qiu Wang,Zheng Xie,Xiaozhong Qu
Herein we report on a biluminophore fast-responding pressure sensitive coating with a bi-layer structure prepared by a non-sensitive reference base paint and subsequently a classic polymer-ceramic pressure sensitive paint (PSP). The coating procedure is fully sprayable and allows the separation of the two luminophores in each layer to prevent their interference that may affect the pressure responsibility. The major advance is the use of sol-gel process of tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES) to make the bottom reference layer which ensures the spreading and affinity of the top PSP, composed of a room-temperature vulcanizing silicone rubber (RTV), so that very thin PSP layer, i.e. less than 5 μm, was achieved. Besides, silane-functionalized carbon dots (CDs) was selected as the reference probe, for it could be well-incorporated with the TEOS/MTES matrix, and gained high loading level and hence strong luminescence of the basecoat to overcome the attenuation effect of the top PSP layer. The resultant biluminophore bi-layer fast-responding PSP (denoted as Fast bi-PSP) showed two completed separated emissions with λ max at 430 and 600 nm for the incorporated CDs and the oxygen sensitive ruthenium complex dye, which enables the utility of intensity ratio from blue and red luminescence for the measurement of surface pressure by following Stern-Volmer relationship. Using a shock tube , the response time of the Fast bi-PSP coating was determined to be 0.4–0.6 ms according to the chemical composition . The ability of the coating for monitoring the dynamic evolution of full-field surface pressure was demonstrated on sample plates at attack angles of 0° and 5°. Our work suggests a facile but efficient way for the future design of self-referenced photoluminescent non-contact surface pressure sensing systems.
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2019
·
IF 7.723
Huan Liu,Lei Liu,Wen-Di Guo,Yong Lu,Xiao-Li Zhao,Ye Liu
The complexation of IrCl 3 ⋅3H 2 O with the electron-deficient phosphines ( L1 - L6 ) respectively afforded a bi-functional catalyst possessing the dual functions of transition metal complex (Ir III -P) and Ir III -Lewis acid for tandem hydroformylation-acetalization of olefins. The best result was obtained over L5 -based IrCl 3 ⋅3H 2 O catalytic system which corresponded to 97% conversion of 1-hexene along with 92% selectivity to the target acetals free of any additive. The crystal structure of the novel Ir III -complex of Ir III -L4 indicated that the electron-deficient nature of the involved phosphine warranted Ir-center in +3 valence state without reduction, which served as the Lewis acid catalyst for the subsequent acetalization of the aldehydes as well. Moreover, as an ionic phosphine, L6 -based IrCl 3 ⋅3H 2 O system immobilized in RTIL of [Bmim]PF 6 could be recycled for 6 runs without the obvious activity loss or metal leaching.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
·
2019
·
IF 4.178
Qin Sun,Wanchun Yang,Yihan Liu,Yufeng Li,Mingyu Li
Soda lime tempered glass was successfully joined by a Bi-B-Zn lead-free low-melting glass with a composition of 35Bi 2 O 3 -50H 3 BO 3 -15ZnO (mol%). The Bi-B-Zn glass exhibited a glass transition temperature (T g ), softening point (T d ) and crystallization temperature (T c ) of 346 ℃, 364 ℃and 448 ℃ respectively. The wettability of the glass on tempered glass substrate was investigated, and a contact angle of less than 13.94° was obtained when the temperature was raised to above 470 ℃ in open atmosphere. The microstructural evolution, interfacial bonding mechanism and mechanical properties of the joint at different joining temperatures were investigated. The diffusion bonding between Bi-B-Zn glass solder and tempered glass was achieved. The crystals of Bi 4 B 2 O 9 were detected in the joint when the joining temperature was higher than 450 ℃. The shear strength and Vickers hardness of the joint reached 35.14 ± 1.89 MPa and 191.55 ± 13.93 MPa, respectively. The effects of the fractions and size of Bi 4 B 2 O 9 on the shear strength were evaluated, and the fracture mechanism at the interface was also clarified.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Qingqing Li,Yanxing Zhang,Xurui Zhang,Hongqiang Wang,Qingyu Li,Jiawei Sheng,Jin Yi,Yuyu Liu,Jiujun Zhang
Electrochemical reduction of CO2 to useful low-carbon fuels can not only mitigate global warming problems but also be used for energy storage. For efficient CO2 electrochemical reduction in mild conditions, high-performance catalysts are required. In this work, the electrodeposition of bismuth, tin, or both on copper sheets to fabricate Sn/Cu, BiSn/Cu, Bi2Sn/Cu, Bi3Sn/Cu, Bi4Sn/Cu, and Bi/Cu electrodes was conducted, and the electrodes were used as catalysts in CO2 reduction. Experimental results show these electrodes have high activity, stability and selectivity toward CO2 reduction to formic acid. A maximum Faraday efficiency of 90.4% for formic acid production can be achieved when using a Bi/Cu electrode. The mechanism catalyzed by such electrodes is also proposed for fundamental understanding and is clearly explained on the basis of DFT calculations. The results in this paper demonstrate that electrodeposition can be a faster and easier to operate industrial technology for the fabrication of catalyst electrodes, compared with other technologies.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Ying Liu,Fei Yang,Wei Qin,Guowei Yang
The Co 2 P@NiCo 2 O 4 bi-functional electrocatalyst was fabricated for hydrogen evolution reaction and oxygen evolution reaction in acidic, neutral and alkaline media. The Co 2 P@NiCo 2 O 4 in alkaline media exhibites an extremely low overpotential of 170 mV in oxygen evolution to achieve a current density of 10 mA cm −2 and produces stable water splitting nearly 30 h. The anchored-Co 2 P can enhance the electrochemical performance of pristine NiCo 2 O 4 as well as increase the tolerance in acidic media of NiCo 2 O 4 . Additional, the Co 2 P is oxidized to oxides/hydroxides species during the electrocatalytic reaction , which acts as the active centers of the electrocatalysis . The Co 2 P@NiCo 2 O 4 catalyst can be used as an effective bifunctional synergistic center in a wide range of pH values (from 0 to 14).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2017
·
IF 2.686
Wen-Jin Zhang,Zi-Xing Zhou,Li Liu,Xin-Xin Zhong,Abdullah M. Asiri,Khalid A. Alamry,Fa-Bao Li,Nian-Yong Zhu,Wai-Yeung Wong,Hai-Mei Qin
Highly emissive copper halide complexes with a bidentate phosphine ligand have been paid much attention. Here, a series of four-coordinate mononuclear copper(I) halide complexes containing bi- and mono-dentate phosphine ligands, [CuX (dpmb)(PPh 3 )] (dpmb = 1,2-bis(diphenylphosphino)–4,5-dimethylbenzene, X = I ( 1 ), Br ( 2 ) and Cl ( 3 )), were synthesized, and their molecular structures and photophysical properties were investigated. These complexes exhibit intense blue emission in the solid state at room temperature and have peak emission wavelengths at 464–479 nm with microsecond lifetimes ( τ = 3.5−4.9 μs; Φ = 0.23−0.52). The emission of the complexes 1–3 mainly originates from MLCT, XLCT and intraligand transitions. Three complexes display moderate thermal stability.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2012
·Vol. 2
·期 9
·3753-3758
·
IF 0
Jing Ma,Jia Chu,Liangsheng Qiang,Juanqin Xue
Bi-doped TiO2/SBA-15 (Bi–TiO2/SBA-15) was synthesized by a wet impregnation method. It was found that SBA-15 retained its ordered hexagonal mesostructure after incorporation of TiO2 and Bi. TiO2 nanoparticles and Bi species dispersed well and anchored both in the channel and the wall of SBA-15. The photocatalytic activity was evaluated on photodegradation of Rhodamine B (RhB) under visible light irradiation (λ ≥ 420 nm). Experimental results indicated that Bi–TiO2/SBA-15 exhibited higher photocatalytic activities than pure TiO2 and TiO2/SBA-15 owing to the synergetic effects of Bi species and TiO2. The degradation of RhB by these catalysts follows the pseudo-first-order kinetic model and Bi–TiO2/SBA-15 (2.0%) was found to be the best. The effect of Bi doping on the photocatalytic activity was investigated by the density functional theory (DFT) method. The calculated results indicated that Bi doping could improve the photocatalytic activity by extending the spectral response from UV to the visible region, making the Bi–TiO2/SBA-15 active under visible light irradiation.
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）