INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·
IF 7.139
Songyin Yu,Fei Wang,Jianchun Jiang,Xinyi Luo,FeiFei Xing,Taotao He,Junfeng Feng,Xiaoxiang Jiang
The Co catalysts for lipid hydrotreatment into green diesel commonly has a poor dispersion of Co and big Co particle size due to metal agglomeration, limiting its catalytic performance. To solve this problem, three Co catalysts on activated carbon (AC), Al 2 O 3 , and nitrogen-doped carbon (NC) are prepared, among which the Co/NC is synthesized by using the Co metal-organic framework (MOF) as the precursor. In the hydrotreatment of oleic acid , the Co/NC catalyst attained 99.6% conversion and 99.6% alkane yield, much higher than Co/AC (76.8% and 14.9%) and Co/Al 2 O 3 (96.3% and 18.7%). From the characterizations of the catalyst, the excellent performance is ascribed to its lamellar structure , large specific surface area, and high dispersion of Co sites, providing massive Co-active sites for hydrotreatment reaction. Moreover, the catalytic performance of Co/NC under various hydrotreatment temperatures with different feedstocks is investigated.
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JOURNAL OF NANOBIOTECHNOLOGY
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2022
·Vol. 20
·期 1
·1-11
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IF 9.429
Chen Mo,Qiao Yingyu,Cao Jie,Ta La,Ci Tianyuan,Ke Xue
Background Acute myeloid leukemia (AML) showed limited clinical therapeutic efficiency with chemotherapy for its multi-distributed lesions and hard-to-kill leukemia cells deep in the bone marrow.Results Here, a biomimetic nanosystem (DR@PLip) based on platelet membrane (PM) coating and doxorubicin (DOX)/ginsenoside (Rg3) co-loading was developed to potentiate the local-to-systemic chemoimmunotherapy for AML. The PM was designed for long-term circulation and better leukemia cells targeting. The participation of Rg3 was proved to enhance the tumor sensitivity to DOX, thus initiating the anti-tumor immune activation and effectively combating the leukemia cells hiding in the bone marrow.Conclusion sIn conclusion, the strategy that combining immediate chemotherapy with long-term immunotherapy achieved improved therapeutic efficiency and prolonged survival, which provided a new perspective for the clinical treatment of AML.
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PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2022
·Vol. 48
·期 8
·3347-3357
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IF 3.134
Zhang Xiangxiang,Zhou Man,Zhong Yang,Zhang Letian,Kang Jianjian,Wang Lingzhi
Co(OH) 2 modified TiO 2 (Co(OH) 2 /TiO 2 ) was fabricated by a simple precipitation method and applied as a surface enhanced Raman scattering (SERS) substrate. Using triphenylmethane dye acid blue 83 as the analyte, the SERS substrate showed high sensitivity with a detection limit of 1 × 10 –7 M and high signal reproducibility with a relative standard deviation of 8.9%. Moreover, the substrate can also be used to in situ monitor the catalytic degradation of Acid blue 83. In addition, compared with cationic triphenylmethane dye, the Co(OH) 2 /TiO 2 substrate presented stronger SERS activity towards anionic counterparts. The easy preparation and high sensitivity and selectivity towards anionic dyes of Co(OH) 2 /TiO 2 provides a robust alternative for promoting the practical application of semiconductor-based SERS substrate in selective detection.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Meichun Qin,Shiying Fan,Xinyong Li,Moses O. Tade,Shaomin Liu
Electroreductive C O coupling provides a prospective strategy for biomass derivative upgrading via reducing the number of oxygen-containing functional groups and increasing their molecular weight. However, exploring superior electrocatalysts with effective reactivity and high selectivity for target products are still a challenge. In this work, single atom Au surface derived NiMn 2 O 4 (SACs Au−NiMn 2 O 4 ) spinel synergetic composites were fabricated by a versatile adsorption-deposition method and applied in electroreductive self-coupling of benzaldehyde to dibenzyl ether . The SACs Au–NiMn 2 O 4 spinel synergetic composites enhanced electroreductive coupling of benzaldehyde, significantly improved the yield and selectivity of dibenzyl ether. Systematic characterizations and density functional theory calculation revealed that atomically dispersed Au occupied surface Ni 2+ vacancies, which played a dominated role in C O coupling of benzaldehyde. Detailed calculation results showed that benzaldehyde preferred to adsorb on Ni octa-hedral sites of NiMn 2 O 4 spinel synergetic structure, single atom Au surficial derivation over NiMn 2 O 4 further reduced the adsorption energy (E ads ) of benzaldehyde on SACs Au−NiMn 2 O 4 , thus the C O coupling of benzaldehyde to dibenzyl ether was promoted. Moreover, single atom Au surficial derivation lowered the energy barrier of rate-determining step, facilitated the formation of dibenzyl ether species. Our work also paves an avenue for rational design single atom materials using spinel as support.
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高影响因子
COLORATION TECHNOLOGY
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2022
·Vol. 139
·期 1
·57-67
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IF 2.049
Fuchun Wang,Wei Ma,Bingtao Tang,Shufen Zhang
To obtain a new type of macromolecular reactive dye with high fixation and good light fastness, poly(styrene- co -maleic acid) was synthesised by co-polymerisation of styrene and maleic anhydride, then, through nitration, reduction, diazotisation and coupling reaction, novel macromolecular reactive dyes were prepared with a solubility greater than 60 g/L. The dyes were used to dye cotton fabrics; the results showed their fixation was more than 92%, and both the rub and wash fastness of the dyes were good. The light fastness of the red and blue dyes with the ethoxy group on melamine was grade 4, and for the yellow dye reached grade 5. The poly(styrene- co -maleic acid) macromolecular reactive dyes exhibit very good application prospects in practice.
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JOURNAL OF PHARMACEUTICAL SCIENCES
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2022
·
IF 3.784
Jiawei Han,Yuanfeng Wei,Luyuan Li,Yutong Song,Zunting Pang,Shuai Qian,Jianjun Zhang,Yuan Gao,Weili Heng
In the previous study, the development of amorphous curcumin (CUR) aimed to enhance the solubility/dissolution of CUR by disrupting its crystal lattice, but it unexpectedly showed a decreased dissolution than its crystalline counterpart on account of gel formation in its dissolution process. Whether such gelation could be eliminated by co-amorphous strategy was answered in this study. Herein, CUR by co-amorphization with chlorogenic acid (CHA) was successfully prepared using quench cooling. The formed co-amorphous material (namely CUR-CHA CM) eliminated the gelation and hence performed superior dissolution performance than crystalline/amorphous CUR. Meanwhile, it exhibited higher physical stability than amorphous CUR during dissolution as well as under long-term/accelerated conditions. To further study the such enhancement mechanism, the internal molecular interactions were investigated for CUR-CHA CM in the solid state as well as in aqueous solution. FTIR and solid-state 13 C NMR spectra confirmed that intermolecular hydrogen bonds formed between CUR and CHA after co-amorphization. Furthermore, the nucleation of CUR was significantly inhibited by CHA in an aqueous solution, thus maintaining the supersaturated dissolution for a long time. The present study offers a feasible strategy to eliminate gelation and enhance stability of amorphous solids by co-amorphization and crystallization inhibition.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2022
·Vol. 105
·期 9
·5638-5648
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IF 4.186
Daixiong Zhang,Qing Xiang
Nafion is suggested as an efficient assistant in preparing supercapacitor by employing nanoparticles. In this work, using a bi-additive of 0.10-mM NaOH + 0.10 g L −1 Nafion, Nafion-assisted electrophoretic co-deposition of Bi 2 O 3 –multiwalled carbon nanotubes (MWCNTs) coating is successfully realized in ethanol solvent. The capacitance performances of the electrophoretic coatings in 6.0-M KOH electrolyte are investigated by cyclic voltammetry and galvanostatic charge–discharge techniques. Comparing with Bi 2 O 3 coating prepared with electrophoretic deposition (EPD) by employing other additive (such as polyethyleneimine), the Bi 2 O 3 coating prepared by Nafion-assisted EPD shows a better capacitance performance. Benefiting from the improvement in coating conductivity caused by MWCNTs, with a small additional amount of 4.0 wt.%, the Bi 2 O 3 –MWCNTs coating exhibits an amazing 164% increase of mass-specific capacitance (473 F g −1 at the current density of 1.0 A g −1 ) in comparison with pure Bi 2 O 3 coating (179 F g −1 at the current density of 1.0 A g −1 ). The cyclic stability test exhibits excellent capacitance retention of 88.7% over 3000 cycles at a constant current density of 10.0 A g −1 . This work combines the advantages of MWCNTs, Nafion, and EPD to provide a facile route for preparing Bi 2 O 3 -based coating as a high-performance supercapacitor electrode.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Liwei Yang,Yin Wei,Yaqi Peng,Yang Liu,Zhou Shu,Yansong Wang,Qingli Meng,Chuanliang Zhao,Hongmei Zhao,Fashan Yang,Bo Lai
Aiming at realizing heavy metal recycling and resource utilization, a carbon-based bimetallic material (Fe 1 Co 2 @C) was fabricated via calcining cationic resin exchanged with Fe and Co cations. It exhibited superior peroxymonosulfate (PMS) activation performance to degrade atrazine (ATZ) compared with the monometallic materials (Fe@C and Co@C). Fe 1 Co 2 @C/PMS performed high degradation of 5 mg/L ATZ with the reaction rate constant ( k obs ) of 0.0869 min −1 within 30 min of reaction time. The effects of catalyst loading, PMS dosage, initial pH, and the presence of inorganic ions (NO 3 − , SO 4 2− Cl − , and HCO 3 − ) and natural organic matters (NOMs) were also investigated in this work. According to the radical quenching experiments and electron paramagnetic resonance (EPR), hydroxyl radical ( • OH) and sulfate radical (SO 4 • − ) were identified to be the primary reactive oxygen species (ROS) responsible for the ATZ degradation, especially • OH. What’s more, reaction mechanism of Fe 1 Co 2 @C was demonstrated that −(C− SO 3 ) x − Co(II) and the synergy between Fe and Co on the surface could both promote the heterogeneous redox cycles of Co(II)/Co(III) and Fe(II)/Fe(III) to activate PMS. Based on the detection results of intermediates by LC-MS, possible degradation pathways of ATZ included dealkylation, dichlorination, hydroxylation, and deamination-hydroxylation processes were proposed. This research not only provides new insights of PMS activation by carbon-based bimetallic catalyst for water treatment, but also proposes a new way for reusing the waste saturated cation resin waste with heavy metal.
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SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Chaozhu Huang,Jingwei Zhao,Haichuan Guo,Ziqin Zhuang,Xiaohang Wang,Jiuyang Yu,Fengdong Qu,Minghui Yang
Gas sensing catalyst is the key to proton exchange membrane fuel cell type gas sensor. However, due to the limitations of Pt/C catalyst in an electronic structure and electrochemical stability, the sensing performance of the sensor inconformity the strict performance objectives, and new sensing materials are required. Here we demonstrate that a novel sensing catalyst, Pt/Ti 0.8 Mo 0.2 N, is a highly efficient CO sensing that outperforms the benchmark material Pt/TiN and Pt/C. Pt/Ti 0.8 Mo 0.2 N effectively reduces the cross-sensitivity of interfering gas and greatly improves the CO selectivity, sensitivity and long-term stability of the sensor. Simultaneously, profit by the design of a high humidity cathode sealing chamber, the relative humidity of the environment exhibits a slight impact on the sensor. Furthermore, we confirm that Pt/Ti 0.8 Mo 0.2 N exhibit the best gas sensing performance at low Pt loading of 15 wt%. This discovery points to the strategy of combining low-cost and high-performance electrode catalytic materials for new generation gas sensors.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 10
·8256-8269
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IF 2.779
Kang Xiao-Ya,Ma Ying-Xia,Wang Jia-Wei,Shi Xiao-Feng,Chen Xin-Quan,Tian Hu,Ran Fen
The cobalt-based metal–organic framework (Co-MOF) as an electrode material with satisfied electrochemical performances has received much attention in energy storage field. Herein, a strip-like Co-MOF was fabricated by a simple one-step solvothermal strategy. In which, the strips are of distinct lengths and thicknesses, and haphazardly lap together to form a stable structure similar to a bird's nest that could provide more moderation space for the volume expansion of the Co-MOF as electrode material in charge and discharge process. The unique structure shows the characteristics of hierarchical pores, which could effectively improve the specific surface area of the Co-MOF material, thereby enhancing the storage of electrochemical energy. The strip-like Co-MOF is endowed with large specific surface area of 643.5 m 2 /g, high specific capacity of 135.1 C/g at a current density of 0.5 A/g, and good capacitance retention of 91.7% after 2000 cycles at 5 A/g. Moreover, the asymmetric supercapacitor device assembled by using the strip-like Co-MOF as cathode and commercial activated carbon (AC) as anode exhibits a specific capacitance of 58.3 F/g at the current density of 0.5 A/g in a voltage window of 1.55 V, and the maximum energy density is 19.5 Wh/kg at a power density of 389 W/kg. The novel strategy to construct unique microstructure MOF with good properties could be applied to prepare other MOF-based functional materials for various applications.
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Catalysts
·
2022
·Vol. 12
·期 2
·236
·
IF 4.501
Xinlei Yu,Xun Tao,Yunfei Gao,Lu Ding,Yanqin Wang,Guangsuo Yu,Fuchen Wang
Compared to the Claus process, selective H2S catalytic oxidation to sulfur is a promising reaction, as it is not subject to thermodynamic limitations and could theoretically achieve ~100% H2S conversion to sulfur. In this study, we investigated the effects of Co and Fe co-doping in ABO3perovskite on H2S selective catalytic oxidation. A series of LaFexCo1−xO3(x = 0, 0.2, 0.4, 0.6, 0.8, 1.0) perovskites were synthesized by the sol-gel method. Compared to LaFeO3and LaCoO3, co-doped LaFexCo1−xO3significantly improved the H2S conversion and sulfur selectivity at a lower reaction temperature. Nearly 100% sulfur yield was achieved on LaFe0.4Co0.6O3under 220 °C with exceptional catalyst stability (above 95% sulfur yield after 77 h). The catalysts were characterized by XRD, BET, FTIR, XPS, and H2-TPR. The characterization results showed that the structure of LaFexCo1−xO3changed from the rhombic phase of LaCoO3to the cubic phase of LaFeO3with Fe substitution. Doping with appropriate iron (x = 0.4) facilitates the reduction of Co ions in the catalyst, thereby promoting the H2S selective oxidation. This study demonstrates a promising approach for low-temperature H2S combustion with ~100% sulfur yield.Keywords:hydrogen sulfide;selective oxidation;perovskite oxides;oxygen vacancy
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International Journal of Polymeric Materials and Polymeric Biomaterials
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2022
·
IF 3.221
Sahid Mehmood,Li Wang,Haojie Yu,Fazal Haq,Bilal-ul Amin,Md Alim Uddin,Shah Fahad,Muhammad Haroon,Di Shen,Zhipeng Ni
In this study, poly(cyclotriphosphazene-co-piperazine) p(HCCP-co-PIP) nanospheres were prepared. The successful preparation of the p(HCCP-co-PIP) nanospheres was confirmed by FT-IR, SEM, TEM, XRD, TGA and DLS, respectively. The prepared p(HCCP-co-PIP) nanospheres were used for drug delivery system. The model drug doxorubicin (DOX) was loaded in p(HCCP-co-PIP) nanospheres. The drug release properties of the p(HCCP-co-PIP) nanospheres were investigated in pH 4.0 and pH 7.4. The cumulative release was found to be 86.2% in pH 4.0 and 54.7% in pH 7.4 at 37 °C after 216 h. The obtained result suggested that the nanospheres could be used as drug carriers.
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