Colloids and Surfaces A: Physicochemical and Engineering Aspects最新文献

{"title":"An injectable, self-healing, and robust double-network composite hydrogel with incorporation of nano-lignin","authors":"Runwei Mei,&nbsp;Haiyan Zhu,&nbsp;Huiyu Bai,&nbsp;Weifu Dong","doi":"10.1016/j.colsurfa.2024.135788","DOIUrl":"10.1016/j.colsurfa.2024.135788","url":null,"abstract":"<div><div>Injectable and self-healing hydrogels with tunable physicochemical properties hold great potential in many biomedical fields, including wound dressings, drug delivery, and tissue engineering. However, the dynamic properties of these hydrogels are often inversely related to their mechanical strength, and their preparation processes are typically complex. To solve these problems, we developed a nanocomposite hydrogel using a simple one-pot method combined with freeze-thaw cycles (F-T). This hydrogel consists of polyvinyl alcohol (PVA), boric acid (BA), sodium polyacrylate (PAANa), and lignin, formed through chemical reactions and multiple dynamic reversible interactions (borate esters and numerous hydrogen bonds). It exhibits excellent mechanical properties (tensile strength of up to 502 kPa and an elongation at break of about 632 %), self-healing capabilities, and injectability. Nano-lignin, rich in phenolic hydroxyl and methoxy groups, functions as a reinforcing agent and physical cross-linker in the hydrogel <em>via</em> non-covalent interactions of its surface functional groups with PVA's hydroxyl groups. Incorporation of nano-lignin boosts its performance (mechanical, self-healing, and injectability) by creating multiple crosslinking points within hydrogel. Moreover, nano-lignin addition enhances the hydrogel's water retention and swelling properties. This study presents a promising strategy for fabricating injectable self-healing hydrogels with exceptional mechanical properties, offering vast potential in biomedical fields.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"706 ","pages":"Article 135788"},"PeriodicalIF":4.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical and microstructural characterization of a precipitation hardened 17-4 steel in different environments","authors":"Temitope Olumide Olugbade ,&nbsp;Bankole I. Oladapo ,&nbsp;Babatunde Olamide Omiyale","doi":"10.1016/j.colsurfa.2024.135795","DOIUrl":"10.1016/j.colsurfa.2024.135795","url":null,"abstract":"<div><div>In this study, an in-depth electrochemical characterization of a precipitation hardened 17-4 stainless steel (SS17-4PH) was carried out in combined acidic, alkaline, and chloride environments. The characterizations were carried out through polarization-EIS analysis, Mott-Schottky analysis to characterize the semiconducting properties of the thin oxide films, and a post-mortem scanning electron microscopy (SEM-EDX) analysis to reveal the morphologies after anodic polarization. The electrochemical measurements revealed that the corrosion rate of SS17-4PH samples in acidic-chloride solutions is higher than the sample polarized in only NaCl or NaOH solution. From the Mott Schottky results, the straight lines with a positive slope obtained for the steel samples in different test media show that there is no change in the semi-conducting properties of the passive film. For samples polarized in acidic-chloride medium, the microstructural examination revealed the formation of a foot-like pit and zig-zag degradation structure. This was attributed to the presence of acid in the test media, and the deposition of corrosion products on the sample surface.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"706 ","pages":"Article 135795"},"PeriodicalIF":4.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adsorption mechanism of Na2S2O3 and FeSO4 as a combined depressant for galena in chalcopyrite-galena flotation separation","authors":"Xing Yang,&nbsp;Hao Lai,&nbsp;Xiao Wei,&nbsp;Peilun Shen,&nbsp;Yan Wang,&nbsp;Mengyang Li,&nbsp;Jinpeng Cai,&nbsp;Dianwen Liu","doi":"10.1016/j.colsurfa.2024.135799","DOIUrl":"10.1016/j.colsurfa.2024.135799","url":null,"abstract":"<div><div>Selective depressants are crucial for the environmentally effective separation of chalcopyrite from galena during the flotation separation of polymetallic sulfide ores. This study investigates the effect of an environmentally friendly combined depressant, comprising Na₂S₂O₃ and FeSO₄ in a 1:1 molar ratio (denoted as STFS), on chalcopyrite-galena flotation separation. Flotation tests indicated that, under pH 8.5 conditions and using O-isopropyl ethylthiocarbamate (Z-200) as a collector, STFS significantly reduced the floatability of galena while minimally affecting the floatability of chalcopyrite. The adsorption mechanism of STFS on the galena surface was studied using contact angle, zeta potential analysis, total organic carbon (TOC) assessment, inductively coupled plasma-optical emission spectrometry (ICP-OES), X-ray photoelectron spectroscopy (XPS), and time-of-flight secondary ion mass spectrometry (ToF-SIMS). Results indicated that STFS chemically adsorbed onto the Pb and PbOH sites on the surface of galena, forming hydrophilic lead-sulfur-oxygen species (PbS_<em>x</em>O_<em>y</em>) and PbOFe complexes (PbOFe(OH)_<em>x</em>(SO₄)_<em>y</em>). These species inhibit the adsorption of Z-200 on the surface of galena, significantly reducing its floatability. This study shows that STFS can be used as a high-performance depressant for galena in the copper-lead separation process, providing theoretical guidance for the flotation separation of chalcopyrite and galena.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"706 ","pages":"Article 135799"},"PeriodicalIF":4.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non-noble nickel-modified covalent organic framework for photocatalytic hydrogen production","authors":"Rongyu Xu,&nbsp;Tong Zhou,&nbsp;Mengyao Tian,&nbsp;Haoran Li,&nbsp;Shen Xu,&nbsp;Yuchen Yang,&nbsp;Yaru Zhang,&nbsp;Jinming Ma,&nbsp;Tifeng Jiao","doi":"10.1016/j.colsurfa.2024.135792","DOIUrl":"10.1016/j.colsurfa.2024.135792","url":null,"abstract":"<div><div>Covalent organic framework (COF) materials, with their remarkable conjugated systems and layered structures, have remained a research focus in the field of photocatalysis in recent years. Incorporating co-catalysts into COFs materials is regarded as a simple and effective strategy to address the serious issue of photogenerated carrier recombination faced by COF-based catalysts. In particular, noble metal co-catalysts can significantly enhance photocatalytic efficiency. However, due to the high cost of noble metals, they are not suitable for long-term and widespread applications. As a result, non-noble metal co-catalysts with low cost and excellent catalytic performance have garnered significant attention. In this study, a non-noble metal Ni-modified COF composite catalyst (Ni/COF) was successfully prepared by loading Ni-based metal salts onto the surface of β-ketoenamine COF (TAPB-Tp-COF) through in situ photodeposition method. The addition of the Ni co-catalyst significantly enhanced the catalytic performance to 0.54 mmol/g·h, which is 4.3 times that of pure TAPB-Tp-COF. This work provides a new approach for constructing economical, clean, and efficient photocatalytic systems.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"706 ","pages":"Article 135792"},"PeriodicalIF":4.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aqueous exfoliated 2D cobalt-iron-layered double hydroxide nanosheets: Effect of Co:Fe ratio on electrocatalytic oxygen evolution reaction","authors":"Shraddha A. Pawar ,&nbsp;Shweta V. Talekar ,&nbsp;Prashant D. Sawant ,&nbsp;Vikas V. Magdum ,&nbsp;Shirin P. Kulkarni ,&nbsp;Yogesh M. Chitare ,&nbsp;Chandrakant D. Lokhande ,&nbsp;Hemraj M. Yadav ,&nbsp;Jayavant L. Gunjakar","doi":"10.1016/j.colsurfa.2024.135793","DOIUrl":"10.1016/j.colsurfa.2024.135793","url":null,"abstract":"<div><div>The water exfoliation strategy is utilized to synthesize ultrathin monolayers of 2-dimensional cobalt-iron-layered double hydroxide nanosheets (CFL-NS) for application in the electrocatalytic oxygen evolution reaction (OER). These nanosheets exhibit a hexagonal crystal structure, and their zeta potential varies between +30 mV and +36 mV, depending on the Co:Fe ratio. The electron microscopy analysis reveals aggregated ultrathin nanosheets with a lateral size of ∼75 nm and the formation of very small nanoparticles due to the tearing of CFL-NS. The bulk CFL and CFL-NS with Co:Fe ratio of 3:1 demonstrate outstanding OER performance, with an overpotential of 305 and 299 mV at a current density of 10 and 25 mA cm⁻², respectively. Additionally, they exhibit a high electrochemical active surface area (ECSA) of 8.5 cm², a Tafel slope of 47 mV dec⁻¹, and excellent electrocatalytic stability during a chronoamperometric test of 24 h. This study underscores the benefits of an aqueous LDH exfoliation strategy for achieving enhanced electrocatalytic performance of CFL-NS.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"706 ","pages":"Article 135793"},"PeriodicalIF":4.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of Fe/Mn/Cu/tourmaline Fenton-like catalyst and the mechanism for degrading organic phosphorous scale inhibitors in simulated electroplating wastewater","authors":"Song Song ,&nbsp;Yihe Qin ,&nbsp;Suran Huang ,&nbsp;Haiming Huang ,&nbsp;Yuancai Chen","doi":"10.1016/j.colsurfa.2024.135760","DOIUrl":"10.1016/j.colsurfa.2024.135760","url":null,"abstract":"<div><div>In Fenton-like reaction process, stable and efficient catalysts are very important to improve the degradation efficiency of refractory organic pollutants. In this study, Fe/Mn/Cu tourmaline Fenton-like catalyst were synthesized using an impregnation calcination method, and hydroxyethylene diphosphate (HEDP) in simulated electroplating wastewater was degraded using the synthesized catalyst. The physicochemical properties of the synthesized catalysts were analyzed by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller nitrogen adsorption desorption. The effects of parameters such as pH, catalyst addition, hydrogen peroxide concentration, and reaction temperature on the efficiency of HEDP removal were investigated using a single-factor method and central composite response surface methodology. Under optimal conditions, the conversion efficiency of organic to inorganic phosphorous was 86.79 %. The electron paramagnetic resonance results indicated that active oxygen species, such as hydroxyl and superoxide radicals, in the reaction system are the primary determinants of the efficient degradation of HEDP. Subsequently, the recovery effects of different coagulants (iron chloride and calcium chloride) on phosphate after simulated wastewater degradation were investigated. Iron-based coagulants showed better recovery effects (pH 7.5, 93.71 %). These results show that Fe/Mn/Cu/tourmaline Fenton-like catalyst have good reusability, high catalytic activity, and broad application prospects in wastewater treatment.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"706 ","pages":"Article 135760"},"PeriodicalIF":4.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fe-doped MOF(Ti)/Bi2MoO6 heterostructure for boosting oxidation/reduction activities under visible light","authors":"Chaowei Luo ,&nbsp;Mengchen Liao ,&nbsp;Diyang Peng ,&nbsp;Jie Xiong ,&nbsp;Hongyan Zeng","doi":"10.1016/j.colsurfa.2024.135798","DOIUrl":"10.1016/j.colsurfa.2024.135798","url":null,"abstract":"<div><div>Constructing of metal-organic framework (MOF) based heterostructures is a feasible strategy to enhance the photocatalytic activities of MOFs in wastewater treatments. Herein, a novel Fe-doped NH₂-MIL-125(Ti)/Bi₂MoO₆ heterostructure (Fe-MOF(Ti)/BMO) was designed and prepared by modifying Bi₂MoO₆ nanoparticles on the Fe-MOF(Ti) surface by a simple solvothermal method. As expected, the Fe-MOF(Ti)/BMO composites displayed more conspicuous photocatalytic properties toward the Cr(VI) reduction and methyl orange (MO) degradation compared to the Fe-MOF(Ti) under visible light. Especially, the optimal Fe-MOF(Ti)/BMO_0.4 exhibited the highest photocatalytic activities for the Cr(VI) reduction and MO degradation, around 1.2 and 1.4 times as high as those of the Fe-MOF(Ti), while the Cr(VI) removal efficiency was still kept above 96.5 % after 5 cycles, superior to that Fe-MOF(Ti) (95.1 %). The enhanced photocatalytic activity and stability of the Fe-MOF(Ti)/BMO_0.4 were owed to the well-dispersed Bi₂MoO₆ nanoparticles, high interfacial charge transfer and strong interfacial contact between the two components induced by the formation of type II heterostructure. Ultimately, the possible enhanced photocatalytic mechanism over the Fe-MOF(Ti)/BMO heterostructure was also proposed. This work demonstrated the MOF-based heterostructure materials have a great potentiality for semiconductor photocatalysis in environmental remediations.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"706 ","pages":"Article 135798"},"PeriodicalIF":4.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of gold nanorod domains and energetics in droplet evaporation","authors":"Imtiaz Ahmad","doi":"10.1016/j.colsurfa.2024.135759","DOIUrl":"10.1016/j.colsurfa.2024.135759","url":null,"abstract":"<div><div>The droplet evaporation method was utilized to explore the self-assembled multi-layered superstructures of LC-phases with various domains of CTAB-coated gold nanorods, oriented both parallel and perpendicular to the surface. The translational entropy of the nanorods decreases during the assembly process, with a significant role played by enthalpic changes in defining the system's energy landscape. The free energy of assembly is specifically tied to the formation of these domains, contributing to thermodynamic stability. SEM images depict gold nanorods forming close-packed connected superstructures of LC-phases, with different domain orientations. Quantification of entropy decrease per particle highlights its role in system stability. The relationship between domain angles, total orientation energy, and capillary forces is analyzed to show how nanorod domain orientations impact overall capillary forces, emphasizing the structural elements' crucial role in shaping capillary interactions within the system.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"706 ","pages":"Article 135759"},"PeriodicalIF":4.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Facile construction of amphoteric lignin-based hydrogel to simultaneously capture ammonium and phosphate ions and reutilization as bio-based slow-release fertilizer","authors":"Yihao Zhang ,&nbsp;Yingnan Sun ,&nbsp;Haiming Li ,&nbsp;Meihong Niu ,&nbsp;Xing Wang ,&nbsp;Zhiwei Wang ,&nbsp;Yanzhu Guo","doi":"10.1016/j.colsurfa.2024.135800","DOIUrl":"10.1016/j.colsurfa.2024.135800","url":null,"abstract":"<div><div>Herein, a type of amphoteric lignin-based hydrogel adsorbent (ALH) was synthesized via free radical polymerization of lignosulfonate with methylacrylloxyethyl trimethyl ammonium chloride and acrylic acid through a simple one-pot approach. The ALH exhibited excellent adsorption capacity in removing ammonium (NH₄⁺) and phosphate (H₂PO₄^-) ions, with a maximum theoretical adsorption capacity (q_e) of 200.49 and 257.22 mg·g⁻¹, respectively. Meanwhile, the effects of ALH dosage, pH values of solution, and interfering ionic ions on the q_e of ALH were also investigated. The adsorption process of ALH for ammonium and phosphate ions obeyed the pseudo-first-order kinetic and Freundlich isotherm model. The possible mechanism of the adsorption processes were the physical and chemical adsorption. The reusability results indicated that ALH exhibited outstanding recyclability and stability, and the adsorption capacity was maintained more than 91.04 % and 91.00 % after five cycles of regeneration. The ALH prepared in this manuscript exhibited relatively higher adsorption capacity to ammonium and phosphate ions than the majority of non-metallic adsorbents. The adsorbed ALH could be reused as a slow-release fertilizer for the culture of rice hydroponics. In addition, the recycled ALH displayed excellent slow-release capacities and 71.5 % of ammonium and phosphate ions were released from ALH-N&amp;P within 30 days. The products in this manuscript would not only open ways on the high-value application of lignin and recirculation of the adsorbent, but also give highlights on developing cost-effective and eco-friendly slow-release fertilizers in agriculture or substrates for oilless culture.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"706 ","pages":"Article 135800"},"PeriodicalIF":4.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanoscale explosive boiling characteristics of thin liquid film over nano-porous substrates from molecular dynamics study","authors":"Md. Aminul Islam ,&nbsp;Monoranjan Debnath Rony ,&nbsp;Sudipta Paul ,&nbsp;Mohammad Nasim Hasan","doi":"10.1016/j.colsurfa.2024.135794","DOIUrl":"10.1016/j.colsurfa.2024.135794","url":null,"abstract":"<div><div>In this study, phase change characteristics of thin liquid argon film over nano-porous substrates has been investigated through Molecular Dynamics Simulation (MDS). Nano-porous substrate having hexagonal shaped nano-pores with variable pore size, height, number, and surface wettability has been considered. Geometric variation of the nano-porous substrate is characterized in terms of two parameters such as the void ratio and the height to arm thickness. The wettability variation is represented by the wall-fluid interaction strength relative to that of fluid-fluid interaction namely, hydrophilic, hydrophobic and superhydrophobic. Present study reveals that the occurrence of explosive boiling has been found to depend both on the surface topology as well as surface wetting condition. For hydrophilic and hydrophobic nano-porous substrates, explosive boiling phenomena have been observed while for superhydrophobic cases diffusive evaporation has been noted. Phase change characteristics have been analyzed in terms of transient atomic distribution and Mean Squared Displacement (MSD), system temperature, wall heat flux, evaporation rate and onset of explosive boiling designating the separation of liquid film from the wall. The phase change mode for hydrophilic and hydrophobic nano-porous substrates changes from sustained explosive boiling to pseudo explosive boiling with the decrease of void ratio and increase in height. Furthermore, it has been observed that nano-porous substrates with lower void ratio offer improved thermal performance, as designated by higher wall heat fluxes along with other transport parameters. In this regard, increasing the height of the nano-porous substrate has been found to have even much stronger effect. Finally, the underlying mechanisms behind better thermal performance of nano-porous substrates have been studied by analyzing early-stage bubble nucleation and evolution inside of the nanopores.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"706 ","pages":"Article 135794"},"PeriodicalIF":4.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}