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A retarded foam acid fluid system for low-temperature dolomite geothermal reservoir stimulation and its action mechanisms 用于低温白云岩地热储层激发的缓发泡酸液体系及其作用机理
IF 4.9 2区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-11-05 DOI: 10.1016/j.colsurfa.2024.135717
Ou Jiang , Pengxiang Zhang , Haiqi Jia , Jin Liang , Xiuhua Zheng
Acidizing improves geothermal reservoir productivity by dissolving rocks to increase formation permeability, which is achieved by injecting acid fluids into reservoir formations. However, conventional acid fluids either can not achieve effective acidizing or cause geothermal reservoir damages. Foam acid fluids, which have been applied for oil-gas reservoir stimulation, can realize effective acidizing by retarding acid-rock reactions, and can protect reservoirs. Here, a foam acid fluid system is proposed, aiming at achieving efficient acidizing and reservoir protection in low-temperature dolomite geothermal reservoirs. Formic acid (FA) and acetic acid (HAc) are used to replace a portion of hydrochloride (HCl) acid. Alkyl glycine surfactant AGS-12 is added for foaming, while xanthan gum and nano silica particles are used to stabilize foams. Corrosion inhibitor and ferric ion stabilizer are added to inhibit acid corrosion of steel and ferric ion precipitations. The acidizing effect was evaluated through foam stability, dissolution performance, corrosion inhibition performance, and compatibility. Microscopic observation, field emission scanning electron microscope, and numerical simulation were applied to reveal the mechanisms of temporal evolution of foams and acid dissolution behaviors. Results show that the foam acid fluid with 5 wt% FA, 5 wt% HAc and 10 wt% HCl acid has the best foam stability and retardation effect. Compared to non-foam acid fluid, the decrease degree of the cuttings mass change rate in foam acid fluids exceeds 50 %, and foaming primarily retards acid-rock reactions. Simulation results is consistent with the experiment results, demonstrating that the cuttings dissolve less in FA and HAc. Calcium (Ca) content on the cuttings surfaces after acid-rock reactions in foam acid fluids with FA and HAc is less than that after acid-rock reactions in foam acid fluid with sole HCl acid, indicating that FA and HAc inhibit Ca-bearing mineral precipitations, as formate and acetate ions can chelate with Ca2+. The replacement of HCl acid by FA and HAc contributes to a low corrosivity and good compatibility of the foam acid fluids due to a reduced hydrogen ions resulted from partial dissociation of weak acids. This study shows the feasibility of foam acid fluids during geothermal reservoir stimulation with eliminated reservoir damages.
酸化是通过向储层注入酸性流体来溶解岩石以增加地层渗透性,从而提高地热储层的生产率。然而,传统的酸性流体要么无法实现有效酸化,要么会对地热储层造成破坏。泡沫酸液已被应用于油气储层的激发,它可以通过延缓酸-岩反应实现有效酸化,并能保护储层。本文提出了一种泡沫酸液系统,旨在实现低温白云岩地热储层的高效酸化和储层保护。使用甲酸(FA)和乙酸(HAc)替代部分盐酸(HCl)。添加烷基甘氨酸表面活性剂 AGS-12 用于发泡,黄原胶和纳米二氧化硅颗粒用于稳定泡沫。添加缓蚀剂和铁离子稳定剂是为了抑制钢的酸腐蚀和铁离子沉淀。通过泡沫稳定性、溶解性能、缓蚀性能和兼容性来评估酸化效果。应用显微观察、场发射扫描电子显微镜和数值模拟揭示了泡沫和酸溶解行为的时间演变机制。结果表明,含 5 wt% FA、5 wt% HAc 和 10 wt% HCl 酸的泡沫酸液具有最佳的泡沫稳定性和缓蚀效果。与非泡沫酸性液体相比,泡沫酸性液体的切屑质量变化率降低幅度超过 50%,泡沫主要减缓酸-岩反应。模拟结果与实验结果一致,表明切屑在 FA 和 HAc 中的溶解度较低。在含FA和HAc的泡沫酸液中进行酸岩反应后,岩屑表面的钙(Ca)含量低于在仅含盐酸的泡沫酸液中进行酸岩反应后的钙含量,这表明FA和HAc能抑制含钙矿物沉淀,因为甲酸根离子和醋酸根离子能与Ca2+发生螯合作用。由于弱酸部分解离产生的氢离子减少,FA 和 HAc 取代盐酸有助于降低泡沫酸液的腐蚀性和兼容性。这项研究表明,在地热储层刺激过程中使用泡沫酸流体是可行的,而且不会对储层造成损害。
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引用次数: 0
Tailoring polythiophene nanocomposites with MnS/CoS nanoparticles for enhanced SERS detection of mercury ions in water 用 MnS/CoS 纳米粒子定制聚噻吩纳米复合材料,增强对水中汞离子的 SERS 检测能力
IF 4.9 2区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-11-05 DOI: 10.1016/j.colsurfa.2024.135715
Temesgen Geremew Tefery , Ravichandran Jayachitra , Adhimoorthy Prasannan , Retno Damastuti , Hsieh-Chih Tsai
The excessive emission of heavy metal ions from industrial processes poses a serious threat to both the environment and human health. This study presents a novel approach using PTh-MnS/CoS NPs for the selective and sensitive detection of Hg2+ ions in water. Such detection is crucial for safeguarding human health, protecting the environment, and assessing toxicity. The fabrication method employs a simple and efficient chemical precipitation technique, combining polythiophene, MnS, and CoS NPs to create active substrates for SERS. The MnS@Hg2+ exhibits a distinct Raman shift at 938 cm−1, enabling specific identification and showing the highest responsiveness among the studied semiconductor substrates with a detection limit of only 1 nM. This investigation shows reliable and practical SERS detection for mercury ions. The RSD ranged from 0.49 % to 9.8 %, and recovery rates varied from 96 % to 102 %, showing selective adsorption of Hg2+ ions on the synthesized substrate.
工业生产过程中排放的过量重金属离子对环境和人类健康都构成了严重威胁。本研究提出了一种利用 PTh-MnS/CoS NPs 选择性灵敏检测水中 Hg2+ 离子的新方法。这种检测对于保障人类健康、保护环境和评估毒性至关重要。该制备方法采用了一种简单高效的化学沉淀技术,将聚噻吩、MnS 和 CoS NPs 结合在一起,形成了 SERS 的活性基底。MnS@Hg2+ 在 938 cm-1 处表现出明显的拉曼位移,可以进行特异性识别,在所研究的半导体基底中,其响应度最高,检测限仅为 1 nM。这项研究表明,SERS 对汞离子的检测是可靠而实用的。RSD 从 0.49 % 到 9.8 % 不等,回收率从 96 % 到 102 % 不等,显示了合成基底对 Hg2+ 离子的选择性吸附。
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引用次数: 0
Interfacial charge and specific adsorption of ions in equilibrium films: Foam film stabilized by nonionic surfactant 平衡薄膜中离子的界面电荷和比吸附性:非离子表面活性剂稳定的泡沫膜
IF 4.9 2区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-11-05 DOI: 10.1016/j.colsurfa.2024.135716
Hidemi Iyota
In order to clarify the effect of adsorption of nonionic surfactant on the charge and specific adsorption of ions at water/air interface, a modified Poisson-Boltzmann equation was applied to equilibrium thickness of foam films stabilized by nonionic surfactant. Equilibrium thickness of foam films stabilized by decyl methyl sulfoxide in the absence of salt was measured as a function of surfactant concentration at constant disjoining pressure. Specific adsorption of anions, responsible for the negative surface charge, is enhanced by the adsorption of decyl methyl sulfoxide at low surfactant concentration. Strong interaction takes place between surfaces in a pentaethyleneglycol monododecyl ether film at low pH below 3.5. Isoelectric point for the surfactant-loaded water/air interface was found to be 3.05 and smaller than 4.4–4.5 for surfactant-free water/air interface.
为了阐明非离子表面活性剂的吸附对水/空气界面上离子的电荷和比吸附的影响,对非离子表面活性剂稳定的泡沫膜的平衡厚度应用了修正的泊松-波尔兹曼方程。在没有盐的情况下,测量了癸基甲基亚砜稳定的泡沫膜的平衡厚度与恒定分离压力下表面活性剂浓度的函数关系。在表面活性剂浓度较低时,癸基甲基亚砜的吸附增强了负表面电荷的阴离子的特定吸附。在低于 3.5 的低 pH 值条件下,五聚乙二醇单十二烷基醚薄膜的表面之间会发生强烈的相互作用。研究发现,含表面活性剂的水/空气界面等电点为 3.05,而不含表面活性剂的水/空气界面等电点小于 4.4-4.5。
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引用次数: 0
Anchorage of ZnO quantum dots and CuO on graphene for sonophotocatalytic treatment of pharmaceutical effluent: From experimental data and prediction by advanced machine learning algorithms 在石墨烯上锚定氧化锌量子点和氧化铜,用于声光催化处理制药废水:来自实验数据和先进机器学习算法的预测
IF 4.9 2区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-11-05 DOI: 10.1016/j.colsurfa.2024.135724
Atena Akbari Kohnehsari , Azadeh Ebrahimian Pirbazari , Fatemeh Esmaeili Khalil Saraei , Amin Esmaeili , Ali Ebrahimian Pirbazari , Erfan Nasiri Alankesh , Ali Amirinezhad
Quantum dots (QDs) have recently received much attention as photocatalysts due to their unique properties. Despite the advantages reported for QDs as photocatalysts in literature, their sonophotocatalytic/photocatalytic activity is still hindered by a series of barriers, which limit them to operate after several successive cycles efficiently. The main aim of this work is to fabricate an efficient and recyclable sonophotocatalyst/photocatalyst using ZnO quantum dots (ZQDs), tenorite (CuO), and graphene (G). In this regard, different amounts of ZQDs (ZQDs(x)/G, x= 10, 20, 30, 40, and 50 mg) were immobilized on graphene by hydrothermal method and various weight percent of CuO was impregnated on ZQDs(40)/G. The PXRD patterns and Raman spectra confirmed the wurtzite and monoclinic crystal structure for ZQDs and CuO, respectively. Also, FESEM, AFM, and PXRD showed that the mean crystal size of ZQDs increased after immobilization on graphene and impregnation by CuO. PL and Mott–Schottky analyses showed that the presence of GO and CuO in CuO(0.5)/ZQDs(40)/G reduced the recombination of excitons and formed p-n heterogeneous junctions between CuO and ZnO. The VB and CB potential and bandgap energy were obtained using DRS and Mott–Schottky analyses, and the mechanism of tetracycline (TC) degradation was proposed according to active species trapping and H2O2 paper testes. The apparent rate constant (kapp) was 0.030 and 0.060 min−1 for photocatalytic and sonophotocatalytic degradation of TC in the presence of CuO(0.5)/ZQDs(40)/G, respectively. The treated effluent of TC showed acceptable performance in growing wheat seeds. The electricity cost estimation showed that (CuO(0.5)/ZQDs(40)/G) consumed less electricity in sonophotocatalytic/photocatalytic TC degradation and could also be used in several successive cycles. Finally, two RF and AdaBoost models based on ML algorithms were developed to predict photocatalytic/sonophotocatalytic degradation. The results showed that the values of statistical metrics, including SAE, MAE, MSE, and RMSE, for the AdaBoost model were relatively lower than those for the RF model, indicating better prediction performance in train and test datasets.
量子点(QDs)作为光催化剂因其独特的性质最近受到广泛关注。尽管文献报道了量子点作为光催化剂的优势,但它们的声光催化/光催化活性仍然受到一系列障碍的阻碍,这些障碍限制了它们在几个连续循环后的高效运行。这项工作的主要目的是利用氧化锌量子点(ZQDs)、钛铁矿(CuO)和石墨烯(G)制造一种高效且可回收的声光催化剂/光催化剂。为此,采用水热法将不同数量的 ZQDs(ZQDs(x)/G,x= 10、20、30、40 和 50 毫克)固定在石墨烯上,并在 ZQDs(40)/G 上浸渍不同重量百分比的 CuO。PXRD 图样和拉曼光谱分别证实了 ZQDs 和 CuO 的钨晶型和单斜晶型晶体结构。此外,FESEM、AFM 和 PXRD 显示,固定在石墨烯上和被 CuO 浸渍后,ZQDs 的平均晶体尺寸增大。PL和Mott-Schottky分析表明,CuO(0.5)/ZQDs(40)/G中GO和CuO的存在减少了激子的重组,并在CuO和ZnO之间形成了p-n异质结。利用 DRS 和 Mott-Schottky 分析方法得到了 VB 和 CB 电位以及带隙能,并根据活性物种捕获和 H2O2 纸试剂提出了四环素(TC)降解机理。在 CuO(0.5)/ZQDs(40)/G 存在下,光催化和声光催化降解 TC 的表观速率常数(kapp)分别为 0.030 和 0.060 min-1。经处理的三氯乙烷废水在小麦种子生长中表现出可接受的性能。电费估算结果表明,(CuO(0.5)/ZQDs(40)/G)在声光催化/光催化降解 TC 的过程中耗电较少,而且可以连续使用几个循环。最后,建立了两个基于 ML 算法的 RF 和 AdaBoost 模型来预测光催化/声光催化降解。结果表明,AdaBoost 模型的统计指标值(包括 SAE、MAE、MSE 和 RMSE)相对低于 RF 模型,表明在训练和测试数据集中具有更好的预测性能。
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引用次数: 0
Investigation of the synergistic effects of SiO2 and Al2O3 nanoparticles with SDS and CTAB surfactants on the stability and improving phase behavior of water-oil emulsions 二氧化硅和氧化铝纳米颗粒与 SDS 和 CTAB 表面活性剂对水油乳液稳定性和相行为改善的协同效应研究
IF 4.9 2区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-11-05 DOI: 10.1016/j.colsurfa.2024.135726
Behrooz Ahmadi , Eghbal Sahraei , Amir H. Mohammadi
The stability of emulsions is a significant challenge across various industries, including food, pharmaceutical, and petroleum. Surface-active agents utilized for enhanced oil recovery often exhibit inadequate performance under reservoir conditions with high salinity, presenting a critical barrier to effective emulsion stabilization. Furthermore, due to the extreme hydrophilic or hydrophobic nature of nanoparticles (NPs), they are not effective in stabilizing emulsions on their own. To address this limitation, a minimal quantity of surfactant was introduced into the NPs to improve their wettability and achieve dual wettability. This research has examined the synergistic effects of SiO₂ and Al₂O₃ NPs combined with sodium dodecyl sulfate (SDS) and cetyltrimethylammonium bromide (CTAB) surfactants on water-oil emulsion stability. This approach enhances emulsion stability by combining the stabilizing effects of both the NPs and the surfactants, an aspect that has not been previously addressed in phase behavior studies through the examination of the interactions and surface behavior of surfactant-nanoparticle complexes at the oil-water interface. Several experiments, including phase behavior, FT-IR, zeta potential, contact angle, and interfacial tension (IFT) tests, were performed to evaluate the interaction of surfactants with NPs. The results demonstrate that combining NPs with surfactants, especially those with opposite charges, significantly reduces IFT to the order of 10−6 mN/m, which can overcome capillary pressure, and enhances optimal salinity levels even up to 75000 ppm. Interactions between CTAB-SiO₂ and SDS-Al₂O₃ notably improve the hydrophobicity of NPs, resulting in IFT reductions of 11.4 and 7 mN/m, respectively, compared to NPs alone.
乳液的稳定性是食品、制药和石油等各行各业面临的一项重大挑战。用于提高石油采收率的表面活性剂在高盐度的储层条件下往往表现不佳,成为有效稳定乳液的关键障碍。此外,由于纳米颗粒(NPs)具有极强的亲水性或疏水性,它们本身并不能有效地稳定乳液。为解决这一局限性,我们在纳米粒子中引入了极少量的表面活性剂,以改善其润湿性,实现双重润湿。本研究考察了 SiO₂和 Al₂O₃ NPs 与十二烷基硫酸钠(SDS)和十六烷基三甲基溴化铵(CTAB)表面活性剂相结合对水油乳液稳定性的协同效应。这种方法结合了 NPs 和表面活性剂的稳定作用,从而提高了乳液稳定性,而这是以前的相行为研究中通过检查表面活性剂-纳米粒子复合物在油水界面上的相互作用和表面行为所没有涉及到的方面。为了评估表面活性剂与 NPs 的相互作用,我们进行了多项实验,包括相行为、傅立叶变换红外光谱、ZETA 电位、接触角和界面张力(IFT)测试。结果表明,将 NPs 与表面活性剂(尤其是带相反电荷的表面活性剂)结合使用,可将 IFT 显著降低到 10-6 mN/m 的数量级,从而克服毛细管压力,并提高最佳盐度水平,甚至可高达 75000 ppm。CTAB-SiO₂ 和 SDS-Al₂O₃ 之间的相互作用显著提高了 NPs 的疏水性,与单独使用 NPs 相比,IFT 分别降低了 11.4 和 7 mN/m。
{"title":"Investigation of the synergistic effects of SiO2 and Al2O3 nanoparticles with SDS and CTAB surfactants on the stability and improving phase behavior of water-oil emulsions","authors":"Behrooz Ahmadi ,&nbsp;Eghbal Sahraei ,&nbsp;Amir H. Mohammadi","doi":"10.1016/j.colsurfa.2024.135726","DOIUrl":"10.1016/j.colsurfa.2024.135726","url":null,"abstract":"<div><div>The stability of emulsions is a significant challenge across various industries, including food, pharmaceutical, and petroleum. Surface-active agents utilized for enhanced oil recovery often exhibit inadequate performance under reservoir conditions with high salinity, presenting a critical barrier to effective emulsion stabilization. Furthermore, due to the extreme hydrophilic or hydrophobic nature of nanoparticles (NPs), they are not effective in stabilizing emulsions on their own. To address this limitation, a minimal quantity of surfactant was introduced into the NPs to improve their wettability and achieve dual wettability. This research has examined the synergistic effects of SiO₂ and Al₂O₃ NPs combined with sodium dodecyl sulfate (SDS) and cetyltrimethylammonium bromide (CTAB) surfactants on water-oil emulsion stability. This approach enhances emulsion stability by combining the stabilizing effects of both the NPs and the surfactants, an aspect that has not been previously addressed in phase behavior studies through the examination of the interactions and surface behavior of surfactant-nanoparticle complexes at the oil-water interface. Several experiments, including phase behavior, FT-IR, zeta potential, contact angle, and interfacial tension (IFT) tests, were performed to evaluate the interaction of surfactants with NPs. The results demonstrate that combining NPs with surfactants, especially those with opposite charges, significantly reduces IFT to the order of 10<sup>−6</sup> mN/m, which can overcome capillary pressure, and enhances optimal salinity levels even up to 75000 ppm. Interactions between CTAB-SiO₂ and SDS-Al₂O₃ notably improve the hydrophobicity of NPs, resulting in IFT reductions of 11.4 and 7 mN/m, respectively, compared to NPs alone.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135726"},"PeriodicalIF":4.9,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653741","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}
引用次数: 0
Suspension-washcoat optimization for preparing copper-manganese oxide structured catalyst towards flue gas CO purification 优化悬浮-水洗涂层,制备用于烟道气 CO 净化的铜锰氧化物结构催化剂
IF 4.9 2区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-11-05 DOI: 10.1016/j.colsurfa.2024.135714
Xuan Zhang , Jiaxin Liu , Jinglei Tian , Jinzhe Liu , Xiong Yang , Yingshu Liu , Jinjuan Li , Chuanzhao Zhang , Ziyi Li
Structured catalysts play significant role in nowaday environmental industry. The copper-manganese oxide (Cu-Mn) is a low cost and efficient catalyst for CO purification from flue gas, for which a robust preparation regarding stabilized suspension and washcoat process is still lacked. This work addressed this challenge by constructing the catalyst suspension by introducing absorbent polymer (SAP), polyvinyl alcohol (PVA), and nano-silica sol (SiO2-NA). The effects of the dosage of SAP, PVA, and SiO2-NA on suspension properties including viscosity, water-retention capacity and stability were systematically studied. The combined effect of the three additives regarding electrostatic-sterical stability and regionalized coating is demonstrated to avoids the destruction of connection between SiO2-NA and Cu-Mn due to the thermal stress during the drying process. After calcination, SiO2-NA is efficiently utilized, evenly distributed and tightly bonded to Cu-Mn catalyst, rendering strongly-attached, crack-free and compact washcoated layer. The optimized structured catalyst shows appreciable balance of loading (up to 182 kg/m3) and strength (powder shedding rate <1 wt%) without blockage. The potential of practical application was verified by CO purification from realistic iron-ore sintering flue gas with catalytic efficiency of above 90 % for 240 h. These findings indicated a promising strategy to design Cu-Mn structured catalysts efficient for industrial use.
结构催化剂在当今的环保产业中发挥着重要作用。铜锰氧化物(Cu-Mn)是一种用于净化烟道气中 CO 的低成本高效催化剂,但目前仍缺乏有关稳定悬浮液和洗涤涂层工艺的可靠制备方法。本研究通过引入吸收性聚合物(SAP)、聚乙烯醇(PVA)和纳米二氧化硅溶胶(SiO2-NA)来构建催化剂悬浮液,解决了这一难题。系统研究了 SAP、PVA 和 SiO2-NA 的用量对悬浮液特性(包括粘度、保水能力和稳定性)的影响。结果表明,三种添加剂在静电-静电稳定性和区域化涂层方面的共同作用可避免 SiO2-NA 和铜-锰之间的连接因干燥过程中的热应力而遭到破坏。煅烧后,SiO2-NA 被有效利用,均匀分布,并与 Cu-Mn 催化剂紧密结合,形成附着力强、无裂纹、致密的水洗涂层。优化后的结构催化剂在装填量(高达 182 kg/m3)和强度(粉末脱落率为 1 wt%)之间表现出明显的平衡,且无堵塞现象。实际应用的潜力通过从现实的铁矿烧结烟气中净化 CO 得到了验证,240 小时的催化效率超过 90%。这些研究结果表明,设计高效的 Cu-Mn 结构催化剂用于工业用途是一种很有前途的策略。
{"title":"Suspension-washcoat optimization for preparing copper-manganese oxide structured catalyst towards flue gas CO purification","authors":"Xuan Zhang ,&nbsp;Jiaxin Liu ,&nbsp;Jinglei Tian ,&nbsp;Jinzhe Liu ,&nbsp;Xiong Yang ,&nbsp;Yingshu Liu ,&nbsp;Jinjuan Li ,&nbsp;Chuanzhao Zhang ,&nbsp;Ziyi Li","doi":"10.1016/j.colsurfa.2024.135714","DOIUrl":"10.1016/j.colsurfa.2024.135714","url":null,"abstract":"<div><div>Structured catalysts play significant role in nowaday environmental industry. The copper-manganese oxide (Cu-Mn) is a low cost and efficient catalyst for CO purification from flue gas, for which a robust preparation regarding stabilized suspension and washcoat process is still lacked. This work addressed this challenge by constructing the catalyst suspension by introducing absorbent polymer (SAP), polyvinyl alcohol (PVA), and nano-silica sol (SiO<sub>2</sub>-NA). The effects of the dosage of SAP, PVA, and SiO<sub>2</sub>-NA on suspension properties including viscosity, water-retention capacity and stability were systematically studied. The combined effect of the three additives regarding electrostatic-sterical stability and regionalized coating is demonstrated to avoids the destruction of connection between SiO<sub>2</sub>-NA and Cu-Mn due to the thermal stress during the drying process. After calcination, SiO<sub>2</sub>-NA is efficiently utilized, evenly distributed and tightly bonded to Cu-Mn catalyst, rendering strongly-attached, crack-free and compact washcoated layer. The optimized structured catalyst shows appreciable balance of loading (up to 182 kg/m<sup>3</sup>) and strength (powder shedding rate &lt;1 wt%) without blockage. The potential of practical application was verified by CO purification from realistic iron-ore sintering flue gas with catalytic efficiency of above 90 % for 240 h. These findings indicated a promising strategy to design Cu-Mn structured catalysts efficient for industrial use.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135714"},"PeriodicalIF":4.9,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654023","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}
引用次数: 0
Enhancing the survival of Lactobacillus plantarum via the rational design of whey protein isolate-high acyl gellan gum gelled water-in-oil emulsions 通过合理设计乳清蛋白分离物-高酰基结冷胶胶凝油包水乳剂提高植物乳杆菌的存活率
IF 4.9 2区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-11-05 DOI: 10.1016/j.colsurfa.2024.135707
Peiyang Li , Meiqi Liu , Wenjing Lu , Qi Ran , Xuanbo Liu , Qiaomei Zhu , Qingbin Guo
In the present study, single whey protein isolate (WPI) gel, high acyl gellan gum (HG), and WPI-HG composite gels at various WPI concentrations in the water phase within W/O emulsions were prepared, to explore the effects of different gel structures on the stability of the emulsion system and the survival of encapsulated Lactobacillus plantarum. The results indicated that the WPI-HG composite gel had a superior effect to the single WPI or HG gel in the stabilization of the W/O emulsion, because of the decrease in droplet size and increase in viscoelasticity. When the WPI concentration was greater than 4.0 wt%, the WPI-HG gel in the internal aqueous phase contributed to a tremendous improvement in the survival rate of Lactobacillus plantarum during the 6-month storage period. The strengthened network structure and lower water activity in the composite gel help improve the probiotics the viability against the thermal damage and harsh gastrointestinal conditions.
本研究制备了W/O乳液中水相中不同WPI浓度的单一乳清蛋白分离物(WPI)凝胶、高酰基结冷胶(HG)和WPI-HG复合凝胶,以探讨不同凝胶结构对乳液体系稳定性和包裹的植物乳杆菌存活率的影响。结果表明,WPI-HG 复合凝胶在稳定 W/O 型乳液方面的效果优于单一的 WPI 或 HG 凝胶,这是因为液滴体积减小,粘弹性增加。当 WPI 浓度大于 4.0 wt% 时,水相内部的 WPI-HG 凝胶能极大地提高植物乳杆菌在 6 个月储存期间的存活率。复合凝胶中强化的网络结构和较低的水活性有助于提高益生菌的存活率,使其免受热损伤和恶劣胃肠道条件的影响。
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引用次数: 0
Nanosecond laser interference ablation of fluorine-free aluminum alloy surfaces for dynamic adhesion and static wettability synergistically modulating water collection 纳秒激光干涉烧蚀无氟铝合金表面,使动态附着力和静态润湿性协同调节集水量
IF 4.9 2区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-11-04 DOI: 10.1016/j.colsurfa.2024.135696
Dongdong Liu , Ri Liu , Liang Cao , Peter Bryanston-Cross , Zhibo Zhang , Zuobin Wang
Water collection from mist is a potential solution to water scarcity, which is a critical issue worldwide. In this paper, laser interference ablation assisted with stearic acid immersion has been used to achieve synergistic modulation of dynamic adhesion and static wettability for water collection on fluorine-free aluminum alloy surface. The research demonstrates that there is an optimal balance point between dynamic adhesion and static wettability for water collection. This optimal point shifts toward low dynamic adhesion at the high misting rate due to the flooding on metastable surfaces with high dynamic adhesion. In addition, wetting transition induced by tilting is observed on metastable surfaces. The good stability of the proposed fluorine-free surface has been demonstrated by the long-term water collection and long periods of immersion in water. This work can provide theoretical inspiration and a scalable preparation method for green and stable water collection strategies.
从水雾中收集水源是解决全球水资源短缺这一关键问题的潜在方法。本文利用激光干涉烧蚀技术辅助硬脂酸浸泡,实现了动态附着力和静态润湿性的协同调节,从而在无氟铝合金表面实现水收集。研究表明,动态附着力和静态润湿性之间存在一个最佳平衡点。这个最佳平衡点在高雾化速率时会向低动态附着力方向移动,原因是高动态附着力的新陈代谢表面会被水淹没。此外,在可变表面上还观察到了由倾斜引起的润湿转变。通过长期集水和长时间浸泡在水中,证明了所提出的无氟表面具有良好的稳定性。这项工作可为绿色稳定的集水策略提供理论启发和可扩展的制备方法。
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引用次数: 0
Enhanced electrochemical activity by NiCo-P nano-particles modified Co-MOF nanorods 纳米镍钴颗粒修饰的 Co-MOF 纳米棒增强了电化学活性
IF 4.9 2区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-11-04 DOI: 10.1016/j.colsurfa.2024.135698
Xue Kang , Guochao Zhang , Wenbiao Li , Hui Gao , Mingquan Cheng , Jian Qi
The design and preparation of high-performance electrode materials are among the most extensively researched topics in supercapacitor studies. By combining the three-dimensional structure and compatibility of cobalt-based metal-organic framework (Co-MOF) with the high redox activity of metal phosphates, a green, efficient, and safe co-precipitation and electro-deposition strategy was employed to fabricate the Co-MOF@NiCo-P heterostructure composite electrode material, with NiCo-P nanoparticles uniformly decorated on the surface of Co-MOF, addressing the issues of limited conductivity of Co-MOF and the tendency of NiCo-P to aggregate when grown in situ on foam nickel. In a three-electrode system, the Co-MOF@NiCo-P electrode exhibits specific capacities of 1389.8 F g−1 at 1 A g−1 and 964.3 F g−1 at 20 A g−1. The assembled Co-MOF@NiCo-P//AC hybrid supercapacitor device demonstrates energy densities of 54.08 Wh kg−1 (22.92 Wh kg−1) and power densities of 825 W kg−1 (8250 W kg−1), showing promising application prospects. This research offers a novel method for developing high-performance electrode materials.
高性能电极材料的设计和制备是超级电容器研究中最广泛的课题之一。通过将钴基金属有机框架(Co-MOF)的三维结构和相容性与金属磷酸盐的高氧化还原活性相结合,采用绿色、高效、安全的共沉淀和电沉积策略,制备了Co-MOF@NiCo-P异质结构复合电极材料,将NiCo-P纳米颗粒均匀地装饰在Co-MOF表面,解决了Co-MOF导电性有限和NiCo-P在泡沫镍上原位生长易聚集的问题。在三电极系统中,Co-MOF@NiCo-P 电极在 1 A g-1 时的比容量为 1389.8 F g-1,在 20 A g-1 时的比容量为 964.3 F g-1。组装后的 Co-MOF@NiCo-P//AC 混合超级电容器装置的能量密度为 54.08 Wh kg-1(22.92 Wh kg-1),功率密度为 825 W kg-1(8250 W kg-1),显示出广阔的应用前景。这项研究为开发高性能电极材料提供了一种新方法。
{"title":"Enhanced electrochemical activity by NiCo-P nano-particles modified Co-MOF nanorods","authors":"Xue Kang ,&nbsp;Guochao Zhang ,&nbsp;Wenbiao Li ,&nbsp;Hui Gao ,&nbsp;Mingquan Cheng ,&nbsp;Jian Qi","doi":"10.1016/j.colsurfa.2024.135698","DOIUrl":"10.1016/j.colsurfa.2024.135698","url":null,"abstract":"<div><div>The design and preparation of high-performance electrode materials are among the most extensively researched topics in supercapacitor studies. By combining the three-dimensional structure and compatibility of cobalt-based metal-organic framework (Co-MOF) with the high redox activity of metal phosphates, a green, efficient, and safe co-precipitation and electro-deposition strategy was employed to fabricate the Co-MOF@NiCo-P heterostructure composite electrode material, with NiCo-P nanoparticles uniformly decorated on the surface of Co-MOF, addressing the issues of limited conductivity of Co-MOF and the tendency of NiCo-P to aggregate when grown in situ on foam nickel. In a three-electrode system, the Co-MOF@NiCo-P electrode exhibits specific capacities of 1389.8 F g<sup>−1</sup> at 1 A g<sup>−1</sup> and 964.3 F g<sup>−1</sup> at 20 A g<sup>−1</sup>. The assembled Co-MOF@NiCo-P//AC hybrid supercapacitor device demonstrates energy densities of 54.08 Wh kg<sup>−1</sup> (22.92 Wh kg<sup>−1</sup>) and power densities of 825 W kg<sup>−1</sup> (8250 W kg<sup>−1</sup>), showing promising application prospects. This research offers a novel method for developing high-performance electrode materials.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135698"},"PeriodicalIF":4.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587037","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}
引用次数: 0
Solvothermal synthesis of a flower-like double Z-scheme PANI/Bi2Sn2O7/BiOBr/Ti photoanode and its performance in photocatalytic fuel cell 溶热合成花状双 Z 型 PANI/Bi2Sn2O7/BiOBr/Ti 光阳极及其在光催化燃料电池中的性能
IF 4.9 2区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-11-04 DOI: 10.1016/j.colsurfa.2024.135699
Hanlu Zeng, Yunlan Xu, Dengjie Zhong, Yuqin Yang, Qingmei Qiao
Photocatalytic fuel cell (PFC) provides a new method to degrade organic pollutants and recover their energy simultaneously. In this work, a novel flower-like hierarchical photoanode (PANI/Bi2Sn2O7/BiOBr/Ti) was synthesized by solvothermal method and assembled with Cu cathode to form a PFC for rhodamine B (RhB) degradation and simultaneous power generation. The crystal structure, chemical composition, and morphology of the photoanode was characterized by a variety of analysis techniques. The photocatalytic activity of the ternary hierarchical composite photoanode was superior to that of single and binary composite photoanodes. Its maximum photocurrent density, maximum power density, degradation rate and FF were 0.241 mA·cm−2, 21.52μW·cm−2, 92.97 % (90 min) and 0.18, respectively. In addition, it still maintains high photocatalytic activity after five consecutive uses. Based on the analysis results of transient photocurrent (i-t), EIS, DRS spectrum, M-S curve and free radical capture experiments, the improvement of photocatalytic performance of PANI/Bi2Sn2O7/BiOBr/Ti photoanode is attributed to the formation of dual Z-scheme heterojunction between PANI and BiOBr and between Bi2Sn2O7 and BiOBr, which realizes the rapid separation and transfer of electron-hole pairs, and retains the strong oxidation of holes in VB of BiOBr and the strong reduction of electrons in LUMO of PANI and CB of Bi2Sn2O7. This study provides a new research idea for the design and construction of high efficiency photoanode in PFC system.
光催化燃料电池(PFC)为降解有机污染物并同时回收其能量提供了一种新方法。本研究采用溶热法合成了一种新型花状分层光阳极(PANI/Bi2Sn2O7/BiOBr/Ti),并将其与铜阴极组装在一起,形成了一种降解罗丹明B(RhB)并同时发电的光催化燃料电池。光阳极的晶体结构、化学成分和形貌通过多种分析技术进行了表征。三元分层复合光阳极的光催化活性优于单元和二元复合光阳极。其最大光电流密度、最大功率密度、降解率和 FF 分别为 0.241 mA-cm-2、21.52μW-cm-2、92.97 %(90 分钟)和 0.18。此外,在连续使用五次后,它仍能保持较高的光催化活性。根据瞬态光电流 (i-t)、EIS、DRS 光谱、M-S 曲线和自由基捕获实验的分析结果,PANI/Bi2Sn2O7/BiOBr/Ti 光阳极光催化性能的提高归因于 PANI 与 BiOBr 之间以及 Bi2Sn2O7 与 BiOBr 之间形成了双 Z 型异质结、实现了电子-空穴对的快速分离和转移,并保留了 BiOBr VB 中空穴的强氧化性以及 PANI 和 Bi2Sn2O7 CB LUMO 中电子的强还原性。这项研究为设计和构建 PFC 系统中的高效光阳极提供了新的研究思路。
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Colloids and Surfaces A: Physicochemical and Engineering Aspects
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