SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Yanqing Cong,Yanan Li,Xiaoran Wang,Xing Wei,Lin Che,Shi-Wen Lv
In this study, a double p-n heterojunction based on g-C 3 N 4 @NiO/Ni@MIL-101 ternary composite was successfully prepared by a feasible method. Results suggested that the rational growth of NiO and MIL-101 on the surface of g-C 3 N 4 can improve the absorption capacity for visible light. Importantly, the formation of double p-n heterojunction can effectively inhibit the recombination of photogenerated electrons and holes. Due to the significant Fermi level differences among NiO, MIL-101 and g-C 3 N 4 , the internal electric fields were established on the interface after constructing the composite, consequently reducing the electrical resistance and accelerating the transfer of photoinduced charge carriers. As expected, the g-C 3 N 4 @NiO/Ni@MIL-101 ternary composite with good stability had excellent photocatalytic performance in the degradation of emerging pollutants, and the removal efficiency of ibuprofen was as high as 95.6%. The •O 2 − , •OH and 1 O 2 were the major active species in the reaction system. Furthermore, developed photocatalytic oxidation system can also achieve the rapid inactivation of bacteria. Based on the synergistic effects of energy band position and double internal electric fields, the separation and transfer of photogenerated charge carriers followed a traditional type-II route. In short, current work not only constructed a promising photocatalyst, but also shared an effective strategy for boosting the photocatalytic activity.
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JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
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2022
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IF 5.062
Lixin Liu,Qi An,Yunan Zhang,Weitong Sun,Jinjing Li,Yanru Feng,Yiding Geng,Guangdong Cheng
With the purpose of improving the solubility and reducing the hygroscopicity of enrofloxacin (ENR), an unreported pharmaceutical salt cocrystal of enrofloxacin with both neutral and anionic p-nitrobenzoic acid (PNB) (ENR-PNB, C 19 H 23 FN 3 O 3 ·C 7 H 4 NO 4 ·C 7 H 5 NO 4 ) was designed and synthesized by changing the reaction molar ratio (1:2) of ENR and coformer PNB on the basis of summarizing the past experience of our group, and its crystal structure was characterized. Single-crystal X-ray diffraction (SCXRD) analysis revealed that the salt cocrystal consists of ENR + , PNB − and PNB neutral molecule in a 1:1:1 ratio. The two asymmetric units that become centrosymmetric form an X-shaped structure centered on the ENR dimer R 2 2 (20). The adjacent X-shaped structures are interconnected by hydrogen bonds to form 1D chain and form the octamer R 8 8 (42) at the same time. As we expected, the formation of the salt cocrystal ENR-PNB results in a simultaneous improvement in the solubility and hygroscopicity of ENR. This may be the fact that ENR and PNB depend on CAHBs to raise the hydrous enthalpy of salt cocrystal. And the presence of PNB neutral molecules lower hygroscopicity of ENR in high humidity environments. Unexpectedly, the permeability of ENR-PNB was also increased compared to that of pure ENR. It is speculated that the number of polar sites in the system is greatly reduced because of hydrogen bonds formation, which increases the permeability of the ENR salt cocrystal. In addition, the in vitro antibacterial activities of ENR-PNB are enhanced at different concentrations compared to ENR. The present study implies that it is possible to improve the solubility, hygroscopic stability, permeability and antibacterial activity of enrofloxacin by changing the chemical reaction molar ratio to form salt cocrystal containing both neutral and anionic coformers, which provides a new strategy and insight to simultaneously improve the solubility and hygroscopicity and even permeability of the active ingredients of solid drugs.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2022
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IF 3.119
Tao Zhang,Liwei Zhuang,Dan Li,Lingzong Meng,Tianlong Deng,Yafei Guo,Yong Ma
The solubilities of salts, refractive indices, and pH values of the equilibrium liquid phases in the quaternary system LiCl–LiBO2–Li2B4O7–H2O at 323.15 K were investigated by the isothermal dissolution method for the first time. The dry-salt diagram of the quaternary system consisted of one invariant point, three univariant curves and three crystallization fields corresponding to LiCl·H2O, LiBO2·2H2O, and Li2B4O7·3H2O. The solution refractive indices and pH values change regularly with the changing of concentration. Combining the equilibrium constants for different boron species, the distributions of six boron species in the mixed solution in the systems LiCl–LiBO2–H2O, LiBO2–Li2B4O7–H2O, and LiCl–Li2B4O7–LiBO2–H2O were calculated with the total boron concentration and pH values. The main boron species in the mixed solution of the quaternary system are B3O3(OH)4–, B4O5(OH)42–, B(OH)3, and B5O6(OH)4–. The boron species distributions are mainly affected by the pH values and the concentration of total boron and LiCl in the solution. The results of phase diagram and boron species distribution in the quaternary system can supply foundation data for separating lithium borate from brines.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Yun Zhong,Jianbin Tang,Xin Zhang,Xinpeng Wei,Mengyao Li,Yujia Feng,Jian Wang
Aerospace, military and precision electronic equipment urgently need efficient, lightweight and durable flexible electromagnetic interference (EMI) shielding fabrics to shield electromagnetic radiation . Inspired by mussels, the corrugated PPTA@PDA@CoNiP composite material with multi-reflection interfaces was designed on the surface of poly para-phenylene terephthalamide (PPTA) fabric through efficient self-assembly of polydopamine (PDA) and electroless deposition Co-Ni-P. The ferromagnetic Co-Ni-P formed a strong interface adhesion with the fabric, and constructed a closed magnetic conductive network (saturation magnetization of 50.8 emu/g and resistance value around 150 mΩ), which enabled electromagnetic radiation to be reflected and absorbed. Hence, PPTA@PDA@CoNiP fabric sample exhibited excellent electromagnetic interference shielding effectiveness (EMI SE, 76.9 dB), absorption loss (SE A , 58.7 dB) and reflection loss (SE R , 18.2 dB) through the synergistic effect of electrical loss and magnetic loss in X-band. PPTA@PDA@CoNiP fabric retained good electrical conductivity even after repeated bending for 1000 cycles. In addition, the fabric still had certain air permeability after deposition of Co-Ni-P, and the Co-Ni-P layer showed excellent corrosion resistance . Meanwhile, this work provided an efficient and green approach for constructing an electromagnetic shielding layer on the surface of an inert fabric.
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Environmental Science-Nano
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2021
·Vol. 9
·期 2
·511-522
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IF 8.131
Xiaohui Zhong,Zuqi Zhong,Shujie Liang,Gongchang Zeng,Shuang Cheng,Hong Deng,Zhang Lin
The electrochemical CO2 reduction reaction (CO2RR) to HCOOH offers a promising strategy for a carbon-neutral cycle. Sn-Based materials have been demonstrated as applicable in extensive studies of CO2RR to HCOOH, but great challenges still remain, including the weak CO2 adsorption and narrow potential window as well as low stability. Herein, we developed ultrasmall Sn nanoparticles inlaid on N/P-doped carbon (Sn@NPC) composites by an upcycling design using Sn electroplating sludge. The obtained Sn@NPC electrode exhibited a higher Faradaic efficiency of 87.93% for HCOOH at 1.05 V vs. RHE and an FE over 80% within a 500 mV broad potential window. Moreover, the Sn@NPC electrode achieved excellent long-term stability up to 105 h, which was superior to that of most Sn-based catalysts in similar systems. Density functional theory calculations demonstrated that Sn@NPC could enhance CO2 adsorption, which led to stronger *OCHO adsorption, weaker *HCOOH adsorption and faster electron/mass transport. This work may provide a promising lead for recycling metal from electroplating sludge and for the design of efficient and stable catalysts for the CO2RR.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
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IF 6.707
Dongshu Sun,Tianyu Zhou,Guangbo Che,Chunbo Liu
The engineering and synthesis of g-C 3 N 4 -based photocatalysts with high utilization rate of charge carriers and extensive visible light responsive range is pivotal to alleviate the energy crisis. Herein, inosculating P-doped g-C 3 N 4 with NiS (NPCN) via the calcination-solvothermal method to establish 2D/2D Schottky-junction with interfacial P-Ni bond photocatalyst can achieve high-efficiency hydrogen production upon exposure to visible light, the 2-NPCN displays superior photocatalytic H 2 -release ability up to 299.6 μmol in the absence of cocatalysts, which is approximately 53.3 times higher than that of BCN (5.6 μmol). Not only that, the apparent quantum efficiency (AQE) of the reconstructed material is 11.7% at 420 nm. Noticeably enhanced photocatalytic HER activities accrue from the fact that P-doped g-C 3 N 4 can shorten the band gap for widening the visible light responsive range, and the synergistic effect of Schottky-junction and P-Ni chemical bond can increase the separation efficiency of electron-hole pairs and efficiently ameliorating the charge transfer dynamics. Moreover, the 2D/2D structure with large and tight contact interfaces can decrease the charge migration distance. In this work, the 2D/2D NPCN Schottky-junction photocatalyst reasonably designed provides a meaningful case for meeting the requirements for high-efficiency hydrogen production driven by solar energy.
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Surfaces and Interfaces
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2021
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IF 4.837
Xiaoming Fan,Yinxue Ma,Akang Sun,Xiao Zhang,Lin Tang,Jinxue Guo
The rational design of heterogeneous catalyst can be favored by synergistic interface for promising water electrolysis performance. Herein, the heterogeneous catalyst of NiFe 2 O 4 /Fe 3 (PO 4 ) 2 -PNC is prepared from NiFe LDH deposited phytic acid incorporated polyaniline nanofibers (PA-PANI) in situ grown on carbon cloth. The hybrid NiFe 2 O 4 /Fe 3 (PO 4 ) 2 nanoparticles acquire modulated OER mechanism due to the promoted proton transfer of phosphate group. The nanoparticles decorated tightly on PNC nanofibers assure high exposure of active sites and fast charge exchange. With the aid of above benefits, the NiFe 2 O 4 /Fe 3 (PO 4 ) 2 -PNC@CC exhibits good OER activities in neutral and alkaline medias, with low overpotentials of 325 mV and 275 mV at current density of 10 mA cm −2 , respectively, showing great potential as pH-tolerant OER catalyst for water splitting.
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Sustainable Energy & Fuels
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2021
·Vol. 5
·期 9
·2477-2485
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IF 6.367
Di Li,Zengyong Li,Jiaojiao Ma,Xinwen Peng,Chuanfu Liu
Developing efficient active transition metal phosphide (TMP) bifunctional electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) for alleviating the future energy crisis is crucial and challenging. Herein, we developed a facile self-assembly strategy for the one-step fabrication of core–shell Co2P nanoparticles encapsulated in nitrogen and phosphorus codoped porous carbon (Co2P@NPPC) via in situ carbonization and phosphorization. Due to the collaborative effect between NPPC and Co2P, the obtained Co2P@NPPC hybrid revealed robust electrocatalytic performance toward the HER and OER. Impressively, it exhibited a lower overpotential of 147 mV for HER and 316 mV for OER to reach the current density of 10 mA cm−2. Remarkably, it only required a low cell voltage of 1.65 V to reach the current density of 10 mA cm−2, with long-time reliable stability. Density functional theory (DFT) calculations suggest that the introduction of phosphorus into cobalt can weaken the H-adsorption free energy and increase the electronic states of Co2P.
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DYES AND PIGMENTS
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2021
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IF 4.889
Wenbo Bai,Guoxu Qin,Jing Wang,Lei Li,Yonghong Ni
It has drawn extensive research interest to integrate luminescent ligands into metal-organic frameworks as luminescent materials due to striking luminescent properties. In this work, a Co-MOF with weak fluorescence emission , [Co(OBA)(2,2′-BPY)], was synthesized by a mixed solvothermal route with Co(NO 3 ) 2 as the Co 2+ ion source, 4,4′-Oxybis(benzoic acid) (OBA) and 2,2′-Bipyridyl (2,2′-BPY) as the ligands. Its fluorescence was obviously enhanced through integrating a small amount of luminescent ligands: 2-aminoterephthalic acid. Interestingly, the above enhanced fluorescence could be selectively quenched by the organophosphorus pesticides with p-nitrophenyl group such as p-nitrophenyl phosphate (PNPP) and bis(p-nitrophenyl) phosphate (BNPP) in water systems. As a case, the detection limit towards PNPP was up to 352 nM (0.07 mg kg −1 ), which is far lower than the standards for similar pesticide residues in fruits in China (0.1–0.6 mg kg −1 ) [ 1 ]. At the same time, the above phenomenon of the fluorescence quenching was not interfered from some other pesticides, metallic ions, amino acids and aromatic nitrocompounds, implying the present fluorescent material has potential application as a highly selective probe for detecting PNPP pesticide residues in food and domestic water. Furthermore, a possible quenching mechanism was discussed.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
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IF 5.816
Bowen Lu,Yanhui Wang,Wei Li,Shiwei Song,Pengfei Tian,Rushuo Li,Xueqing Tian,Xiangyu Liu,Jianbing Zang
The development of self-supporting electrodes that exhibited both high efficiency and good durability remained a challenge in the field of hydrogen energy utilisation. Here, we designed a self-supporting 3D hierarchical porous electrode by filling carbon nanotubes (CNTs) loaded with Ni–P alloy into the framework of nickel foam (NF). Firstly, CNTs were decorated with a catalytically active Ni–P alloy via electroless plating (Ni–P@CNTs). Then, the Ni–P@CNTs were filled and anchored onto the framework of NF via electroplating to synthesise a self-supporting electrode (Ni–P@CNTs/NF). The Ni–P@CNTs/NF exhibited an excellent catalytic performance toward the hydrogen evolution reaction (HER) in 1 M KOH electrolyte, with an overpotential of 53 mV at 10 mA cm −2 , a small Tafel slope of 101.56 mV dec −1 and excellent long-term durability. This facile and effective strategy might provide a new path to the design of self-supporting electrodes with enhanced HER catalytic.
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Frontiers in Pharmacology
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2021
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IF 5.811
An Jing,Cheng Lijun,Yang Liping,Song Nali,Zhang Ju,Ma Kejian,Ma Ji
Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease, and it has gradually become the main disease burden in the world. However, the pathogenesis of NAFLD is complex, involving such things as dyslipidemia, oxidative stress, inflammation, etc. This brings to the table a significant challenge for drug development, and there is still no drug approved by the FDA on the market to treat the disease. GAS and HBA are active ingredients of the orchidaceae plant gastrodia elata and have exhibit effects in ameliorating nervous system diseases caused by oxidative stress. HBA is a metabolite of GAS that could perform lipid regulation and improve oxidative stress on HCD-induced NAFLD larval zebrafish, as reported by previous studies; we therefore explored the role of HBA in lipid regulation and oxidative stress on HCD-induced NAFLD larval zebrafish in vivo and FFA-induced BRL-3A hepatocyte in vitro. The gene expression of lipogenesis, inflammation, and oxidative stress were measured to investigate the underlying mechanism of HBA, and the potential protein target of HBA was explored by immunofluorescence. Altogether, our data highlight the role of HBA in improving NAFLD by use of its lipid-lowering and anti-oxidative properties via the Nrf2/HO-1 signaling pathway, providing a potential therapeutic compound for NAFLD treatment.
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PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2021
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IF 2.694
Xiaomin Qiu,Bingjie Huo,Qi Wang,Jingwei Yang,Zhaoyou Zhu,Yinglong Wang,Jun Gao
In this work, the effects of N-methyl pyrrolidone, N,N-dimethylformamide, cyclohexanol, butyl butyrate, and N-formylmorpholine on the separation efficiency of a p-xylene and 1-pentanol azeotropic system are investigated, and the best solvent is selected from these solvents. The vapor–liquid equilibrium data of binary systems of 1-pentanol + butyl butyrate, 1-pentanol + N-formylmorpholine, and p-xylene + butyl butyrate are measured using a modified Rose-type circulating still under 101.3 kPa. In order to check the thermodynamic consistency of the experimental vapor–liquid equilibrium data, the Herington and Van Ness methods are used. In addition, the nonrandom two-liquid, universal quasichemical, and Wilson models are used to correlate the experimental data of binary systems, and the interaction parameters of binary systems are obtained.
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