APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Zonglin Liu,Baoqiang Li,Yujie Feng,Dechang Jia,Caicai Li,Qingfeng Sun,Yu Zhou
Reasonable design and facile synthesis of high-efficiency non-noble electrocatalysts for hydrogen evolution reaction (HER) in water splitting are crucial for renewable and clean energy technologies. Increasing the number of active sites via nanostructuring is a fundamental method to promote the HER activity of the catalysts. However, the balance between the exposed active sites and the stability cannot be well maintained due to the aggregation of nanoscale catalysts. Therefore, it is imperative to combine effective active compounds with suitable carbon materials to stabilize nanomaterials. Hence, a hybrid architecture with Ni(PO 3 ) 2 nanoparticles ladened on the carbon nanotubes (Ni(PO 3 ) 2 /CNTs) was elaborately designed and synthesized by pyrolyzing the nickel phthalocyanine (NiPc)/CNTs assemblies and subsequent phosphidation. The π-π interaction between NiPc and CNTs is conductive to the tight attachment of the active species to the substrate, while the inlaid structure effectively prevents the corrosion/aggregation of Ni(PO 3 ) 2 nanoparticles and ensures the stability of the catalyst. Accordingly, Ni(PO 3 ) 2 /CNTs displayed excellent HER performances with remarkable stability both in 1.0 M KOH and 0.5 M H 2 SO 4 with overpotentials of 71 mV and 87 mV at 10 mA cm −2 , respectively. The Tafel slopes of Ni(PO 3 ) 2 /CNTs in alkaline and acid medium were 65 mV dec -1 and 46 mV dec -1 , respectively, both exposed a Volmer-Heyrovsky mechanism during the HER. The present work will shed new light on the exploitation of non-noble metal high-efficiency HER electrocatalysts.
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高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 8
·期 11
·2100308
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IF 6.147
Weiwei Zhao,Tiantian Chen,Weikang Wang,Shuaihang Bi,Mengyue Jiang,Kenneth Yin Zhang,Shujuan Liu,Wei Huang,Qiang Zhao
2D conductive metal–organic frameworks (2D c-MOFs) naturally possess high active sites, large specific surface areas, and fast ion transport for energy-storage devices. However, the intelligent exploration of 2D c-MOFs for the emerging flexible transparent supercapacitors (FTSCs) with excellent photoelectric property and electrochemical activity is rarely implemented. Herein, 2D conductive ultrathin Cu 3 (HHTP) 2 (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene) film is synthesized on the indium tin oxide/polyethylene terephthalate (ITO/PET) substrate for flexible transparent conductive electrodes (FTCEs) through the layer-by-layer assembly method. The interconnected conductive frameworks possess the cooperative superiority of low internal resistance, fast electrolyte ion diffusion, and quick electron transfer. Cu 3 (HHTP) 2 -15/ITO/PET FTCEs show high photoelectric property of T 550 nm = 82.2% and R s = 49.1 Ω sq −1 , and high areal capacitance ( C A ) of 1700 µF cm −2 . The corresponding symmetrical FTSCs ( T 550 nm = 62.1%) exhibit excellent C A of 939.2 µF cm −2 at the current density of 7 µA cm −2 , superior rate capability (63.9% at 150 µA cm −2 ), long-term cycling stability (85% after 3000 cycles), and mechanical flexibility under different bending angles. This work provides key insights into the design and synthesis of 2D c-MOF films for flexible transparent energy-storage devices.
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ENZYME AND MICROBIAL TECHNOLOGY
·
2021
·
IF 3.493
Min Lu,Hao Zhang,Xu Wang,Hui Jiang,Guang Hu,Feng-Qing Yang
A simple, convenient and efficient enzyme immobilization method through phytic acid (PA) modified α-Glucosidase (α-Glu)/Cu 3 (PO 4 ) 2 ·3H 2 O hybrid nanoflower was developed. The structural properties of the materials were studied by several characterization techniques. Subsequently, the enzymatic reaction conditions such as the pH value and temperature were optimized, and the enzyme kinetics and inhibition parameters were determined. The PA modified α-Glu/Cu 3 (PO 4 ) 2 ·3H 2 O hybrid nanoflower had better enzymatic activity under a wide pH range and high temperature than the free one. After seven successive cycles, the PA modified α-Glu/Cu 3 (PO 4 ) 2 ·3H 2 O hybrid nanoflower could still maintain approximately 63.0 % of its initial immobilized enzyme activity. The Michaelis-Menten constant ( K m ) and the half-maximal inhibitory concentration (IC 50 ) of acarbose were determined as 0.77 mM and 15.01 μM, respectively. In addition, the material was applied to evaluate the inhibitory activity of ten phenolic compounds on α-Glu, and epicatechin gallate, gallocatechin gallate, epigallocatechin gallate and rosmarinic acid showed good inhibitory activity with % of inhibition of (53.42 ± 2.39)%, (37.28 ± 1.32)%, (37.08 ± 0.63)% and (35.53 ± 0.23)%, respectively. These results indicate that the PA modified hybrid nanoflower is an efficient method of α-Glu immobilization.
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PubMed
高影响因子
MATERIALS LETTERS
·
2021
·
IF 3.423
Chunyun Ma,Yan Zhang,Chuankai Yang,Miaorong Zhang,Jianguo Tang
Lipase was immobilized with Cu 3 (PO 4 ) 2 ⋅3H 2 O to synthesize lipase-Cu 3 (PO 4 ) 2 ⋅3H 2 O hybrid microflowers (Lip-MFs). Surfactants (Tween 80, Triton X-100 and CTAB) were added to study their effect on the morphology and activity of Lip-MFs. SEM images revealed that surfactants can increase the size of Lip-MFs and make the hierarchical structure more compact. Further, compared with other surfactants, the activity of CTAB-Lip-MFs was 1.45 times of that of free lipase, demonstrating CTAB is conducive to improve the activity of lipase.
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高影响因子
Water
·
2021
·Vol. 13
·期 17
·2315
·
IF 3.103
Shuangyang Zhao,Meixi Li,Jie Ding,Shanshan Yang,Yani Zang,Yan Zhao,Xinlei Gao,Nanqi Ren
In the last few decades, anthraquinone and its derivatives (AQs) have been intensively applied to electrochemical, textile and dye, and photovoltaic industries. This has increased the levels of AQs in the natural environment and threatens human health. To remove AQs from the aqueous phase and recover these multi-functional molecules, a binary magnetic adsorbent, reduced graphene/Fe3O4(rGO/Fe3O4), was synthesized via a hydrothermal method. Transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), Raman spectra, and thermogravimetric analysis (TGA) were then used to characterize the samples. The adsorption capacities of rGO/Fe3O4to AQs were investigated by selecting anthraquinone-2-sulfonate (AQ2S) as a model molecule. The adsorption process followed the Langmuir adsorption isotherm and the second-order kinetics. The regeneration of adsorbents and the recycling of AQ2S and solvent were simultaneously achieved by Soxhlet extraction and rotary evaporation. These results confirm the high adsorption efficiency of rGO/Fe3O4for removing AQs from water and provide a promising approach to recover the valuable molecules from the aqueous phase.Keywords:adsorption;magnetic composite;anthraquinone-2-sulfonate;regeneration
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Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Yangjinghua Yu,Runjun Sun,Zhong Wang,Mu Yao,Guohe Wang
Graphene oxide (GO) composite materials as adsorbent have been widely researched in the adsorption various heavy metal contaminated water . In order to improve its structural stability and adsorption properties, self-support GO/Sodium Alginate (SA)/1, 2-Propanediamine (PDA) composite membrane was prepared by vacuum filtration. The performance of amino functional groups in composite membranes was observed using X-ray photoelectron spectrum (XPS). The X-ray diffraction (XRD) was used to characterize the interlayer spacing. The Pb 2+ adsorption properties of composite membranes were discussed by intermittent adsorption experiments. Intermittent adsorption experiments include the subject of the pH, contact time, adsorption film weight, concentration of metal ion and temperature change. The Pb 2+ adsorption on the composite membrane strongly depends on pH. After 20 min of adsorption, the membrane reached the adsorption equilibrium, and the adsorption rate was fast. The maximum adsorption capacity of the composite membrane to Pb 2+ was 189.25 mg g −1 . The adsorption process of the membrane was consistent with the chemisorption process and mono-layer adsorption process. The GO/SA/PDA membranes can be used to the adsorption of Pb 2+ , which might give contribution to environmental protection.
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高影响因子
ACTA PHARMACOLOGICA SINICA
·
2021
·Vol. 43
·期 1
·96-110
·
IF 6.15
Liu Xue-qi,Jiang Ling,Li Yuan-yuan,Huang Yue-bo,Hu Xue-ru,Zhu Wei,Wang Xian,Wu Yong-gui,Meng Xiao-ming,Qi Xiang-ming
Diabetic kidney disease (DKD) is one of the microvascular complications of diabetes mellitus and a major cause of end-stage renal disease with limited treatment options. Wogonin is a flavonoid derived from the root of Scutellaria baicalensis Georgi, which has shown a potent renoprotective effect. But the mechanisms of action in DKD are not fully elucidated. In this study, we investigated the effects of wogonin on glomerular podocytes in DKD using mouse podocyte clone 5 (MPC5) cells and diabetic mice model. MPC5 cells were treated with high glucose (30 mM). We showed that wogonin (4, 8, 16 μM) dose-dependently alleviated high glucose (HG)-induced MPC5 cell damage, accompanied by increased expression of WT-1, nephrin, and podocin proteins, and decreased expression of TNF-α, MCP-1, IL-1β as well as phosphorylated p65. Furthermore, wogonin treatment significantly inhibited HG-induced apoptosis in MPC5 cells. Wogonin reversed HG-suppressed autophagy in MPC5 cells, evidenced by increased ATG7, LC3-II, and Beclin-1 protein, and decreased p62 protein. We demonstrated that wogonin directly bound to Bcl-2 in MPC5 cells. In HG-treated MPC5 cells, knockdown of Bcl-2 abolished the beneficial effects of wogonin, whereas overexpression of Bcl-2 mimicked the protective effects of wogonin. Interestingly, we found that the expression of Bcl-2 was significantly decreased in biopsy renal tissue of diabetic nephropathy patients. In vivo experiments were conducted in STZ-induced diabetic mice, which were administered wogonin (10, 20, 40 mg · kg −1 · d −1 , i.g.) every other day for 12 weeks. We showed that wogonin administration significantly alleviated albuminuria, histopathological lesions, and p65 NF-κB-mediated renal inflammatory response. Wogonin administration dose-dependently inhibited podocyte apoptosis and promoted podocyte autophagy in STZ-induced diabetic mice. This study for the first time demonstrates a novel action of wogonin in mitigating glomerulopathy and podocytes injury by regulating Bcl-2-mediated crosstalk between autophagy and apoptosis. Wogonin may be a potential therapeutic drug against DKD.
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 30
·13592-13598
·
IF 3.591
Chengfa Wu,Junwei Feng,Feng Yu
A new rare earth borate Na2La2B10O19 was successfully synthesized by spontaneous crystallization in a high temperature solution. It crystallizes in the centrosymmetric (CS) space group C2/c with an infinite two-dimensional (2D) double layer which is composed of the fundamental building block (FBB) [B5O12]9−. The calculated birefringence of the compound is 0.06 @1064 nm which mainly originates from the contributions of the B–O anion group according to the first-principles study.
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Catalysis Science & Technology
·
2021
·Vol. 11
·期 11
·3706-3714
·
IF 6.119
Lekai Zheng,Lina Hu,Yongchuan Hu,Fang Liu,Zhiming Liu,Yanming Xue,Jun Zhang,Hui Liu,Chengchun Tang
The development of efficient, stable and low-cost oxygen evolution reaction (OER) catalysts in anodes is essential for the production of hydrogen resources by electrolyzing water. Cobalt hydroxide (α-Co(OH)2) is one of the most encouraging electrocatalysts for the OER under alkaline conditions, but its catalytic activity is still unsatisfactory possibly due to its unfavorable electronic structure. The construction of heterogeneous catalysts has been considered as an effective strategy to change the interface and modulate the electronic structure of electrocatalysts, resulting in improved activities. Herein, novel self-supported α-Co(OH)2 coated Co3O4 nanosheet arrays on conductive carbon cloth have been constructed and fabricated via a simple electrodeposition method (α-Co(OH)2/Co3O4/CC), serving as efficient catalysts for the OER. The as-prepared heterostructure with optimal proportions of α-Co(OH)2 to Co3O4 exhibits an enhanced overpotential of 275 mV at 10 mA cm−2 (322 mV for α-Co(OH)2/CC and 359 mV for Co3O4/CC), a low Tafel slope of 76 mV dec−1 and excellent durability for 22 h. The further electrochemical results show that the formation of heterostructure can optimize the electronic structure of the catalysts through interfacial coupling effect, improve the charge transfer ability and increase the electrochemical active sites, all of which are beneficial to the OER performance enhancement. This work not only develops a highly efficient and stable non-precious metal catalyst toward the OER, but also opens up new ways for boosting the performance by regulating the electronic structure through interface engineering of electrocatalysts and beyond.
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高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Hang Liu,Hua Yin,Shaoyu Tang,Hui Peng,Xiaolong Yu,Guining Lu,Zhi Dang
In this work, the prepared mesoporous TiO 2 was employed to eliminate the environmental risk induced by the combined pollution (tris-(2-chloroisopropyl) phosphate (TCPP) and Cd 2+ ). The prepared material was characterized by X-ray diffraction (XRD), UV–vis diffuse reflectance spectra (UV-DRS), Raman imaging spectrometer (Raman), N 2 adsorption/desorption isotherm and X-ray photoelectron spectroscopy (XPS). In the combined pollution system, the prepared TiO 2 simultaneously exhibited a higher adsorption and photocatalytic activity for Cd 2+ and TCPP at neutral condition, respectively. The adsorption of Cd 2+ and photo-degradation of TCPP by mesoporous TiO 2 followed pseudo-second-order and pseudo-first-order kinetics model, respectively. The removal efficiency of TCPP was improved from 67% to 100% when the concentration of co-existed Cd 2+ increased from 0.5 mg L −1 to 2 mg L −1 , due to the fact that the adsorbed Cd 2+ on the surface of TiO 2 scavenged electron and thus inhibited the photo-generated electron-hole pairs recombination. In addition, six degradation intermediates were determined by high resolution mass spectrum (HRMS) and potential transformation pathways of TCPP under the co-existence of Cd 2+ were proposed. The results suggested that rapid and high-efficient simultaneous removal of Cd 2+ and TCPP was feasible, which laid the basis for the remediation of other combined pollution in the future.
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高影响因子
ACS Omega
·
2020
·
IF 2.87
Yu-hang Song,Qing-tao Xu,Tao He,Zi-yang Wang,Lei Yu
An anthraquinone-2-sulfonate and reduced graphene oxide nanocomposite (AQS@rGO) was prepared and the improvement on the biotic reduction of a pollutant, i.e., azo dye, was demonstrated. Electron paramagnetic resonance signal of the semi-quinone radical in the well-dispersed solid AQS@rGO solution was detected. Although the as-prepared AQS@rGO has a negligible adsorption capacity toward methyl orange (MO) dye, the decolorization efficiencies in both flask experiments and sequencing operation reactors in the presence of AQS@rGO were increased by more than 1.5 times as compared to that with graphene oxide, and an efficient and continuable catalytic effect on the decolorization of azo dyes in seven operation periods was maintained. The catalytic effect on reduction was caused by the formation of a space-charge layer, which facilitates the efficient e– transfer from the conductive rGO sheets to the C═O of the AQS molecule. The results suggested that the AQS@rGO may act as an efficient insoluble redox mediator, which is important for the pollution control by accelerating the extracellular electron transfer.
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高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2020
·Vol. 50
·期 11
·1091-1099
·
IF 2.384
Fa Dejuan,Miao Yuqing
Abstract The NiHPO 4 –Ni(OH) 2 nanowire-assembled bouquets were easily synthesized. Scanning electron microscopy and transmission electron microscopy show the NiHPO 4 –Ni(OH) 2 bouquets form through the organization of nanowires which arrange with certain direction. The electrocatalytic activities of NiHPO 4 –Ni(OH) 2 –GCE towards the oxidation of methanol and urea were studied in NaOH. The nanowire-assembled bouquets were modified on the surface of the glassy carbon electrode, leading to the increase on the surface area of the electrode, which in turn enhanced the current density and electrocatalytic performance for the oxidation of methanol and urea. It shows the potential applications for the utilization of these energy molecules. Graphic abstract
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高影响因子
危险品化学品经营许可证（带存储）