JCIS open最新文献_第2页

Pickering emulsions synergistically stabilized by oligomeric amines and silica nanoparticles 由低聚胺和二氧化硅纳米颗粒协同稳定的皮克林乳状液

Q3 Materials Science

JCIS open

Pub Date : 2025-10-10 DOI: 10.1016/j.jciso.2025.100158

Peili Wang, Xiaomei Pei, Binglei Song, Zhao Chen, Zhenggang Cui

Pickering emulsions have been widely applied in various fields. In this work, oligomeric amines (2N-C_n-2N, n = 6, 8, 10) with two secondary and two tertiary amine groups were successfully synthesized. Pickering emulsions were stabilized by using silica nanoparticles and oligomeric amines with an oil-water ratio of 1:1 (v/v). At a fixed silica particle concentration of 0.2 wt%, the minimum concentrations of oligomeric amines 2N-C_n-2N (n = 6, 8, 10) required to stabilize the emulsion are 0.3, 0.3, and 0.06 mM, respectively, which decrease significantly with increasing spacer chain length. Contact angle experiments revealed that the in situ hydrophobization of nanoparticles was caused by the surface adsorption of amine molecules. Different with the previously reported silica particles modified by oppositely charged surfactants, the major interactions between the oligomeric amines and silica nanoparticles are hydrogen bonds instead of electrostatic attractions. The Pickering emulsion remained stable at 80 °C for at least 72 h without phase separation. In addition, the system exhibits pH responsiveness, and the emulsion can be cycled between demulsification and emulsification state for over 5 times by alternating addition of HCl and NaOH. This work provides a novel approach for the in situ hydrophobization of nanoparticles through hydrogen bonding and can be widely applied in the fields of medicine and cosmetics.

皮克林乳剂已广泛应用于各个领域。本文成功合成了具有两个仲胺和两个叔胺基团的低聚胺（2N-Cn-2N, n = 6,8,10）。采用二氧化硅纳米颗粒和低聚胺，油水比为1:1 （v/v）稳定酸洗乳状液。在固定的二氧化硅颗粒浓度为0.2 wt%时，稳定乳状液所需的低聚胺2N-Cn-2N （n = 6、8、10）的最小浓度分别为0.3、0.3和0.06 mM，随着间隔链长度的增加，其浓度显著降低。接触角实验表明，纳米颗粒的原位疏水是由胺分子的表面吸附引起的。不同于之前报道的由带相反电荷的表面活性剂修饰的二氧化硅颗粒，低聚胺与二氧化硅纳米颗粒之间的主要相互作用是氢键而不是静电吸引。皮克林乳状液在80℃下保持稳定至少72 h而不发生相分离。此外，该体系具有pH响应性，通过HCl和NaOH的交替加入，乳液可以在破乳和乳化状态之间循环5次以上。本研究为纳米颗粒的氢键原位疏水提供了一种新的途径，在医药、化妆品等领域具有广泛的应用前景。

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引用次数: 0

Photocatalytic degradation of organic pollutants under solar irradiation using single-walled carbon nanotube/titanium dioxide nanocomposites 单壁碳纳米管/二氧化钛纳米复合材料在太阳辐照下光催化降解有机污染物的研究

Q3 Materials Science

JCIS open

Pub Date : 2025-10-07 DOI: 10.1016/j.jciso.2025.100157

Areeya Aeimbhu, Jamaree Amonkosolpan, Wichuda Boonyaratgalin, Nopmanee Supanam

A nanocomposite of titanium dioxide nanoparticles (TiO₂ NPs: P25) modified with single-walled carbon nanotubes (SWCNTs) was synthesized using a simple mixing method, with varying TiO₂ NP mass ratios (5–20 wt%). The nanocomposites were characterized using field emission scanning electron microscopy (FE-SEM), Brunauer-Emmett-Teller (BET) analysis, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and UV–Vis diffuse reflectance spectroscopy (DRS). Photocatalytic degradation performance was evaluated using methylene blue as a model organic pollutant under solar light irradiation. FE-SEM images confirmed the effective dispersion of TiO₂ NPs within SWCNT bundles, while FTIR analysis verified the incorporation of both TiO₂ NPs and SWCNTs. Adding SWCNTs extended TiO₂'s light absorption from the ultraviolet to the visible range, enhancing photocatalytic degradation under solar light compared to TiO₂. Tauc plot analysis revealed TiO₂NPs have an indirect energy band gap of 3.24 eV, while the SWCNTs/TiO₂ nanocomposites with a 1:5 mass ratio showed a direct energy band gap of 1.22 eV. The SWCNTs/TiO₂ nanocomposite (1:5) exhibited the highest specific surface area. Photocatalytic experiments with this ratio achieved up to 99 % removal of methylene blue within 60 min of sunlight exposure. Furthermore, SWCNTs can accelerate the formation of TiO₂ NPs sludge within 2 h. The SWCNTs-supported TiO₂ sludge is reusable in catalytic applications, helping to minimize waste disposal concerns.

采用简单的混合方法合成了单壁碳纳米管（SWCNTs）修饰的二氧化钛纳米颗粒（TiO2 NPs: P25）纳米复合材料，其TiO2 NP质量比为5-20 wt%。采用场发射扫描电镜（FE-SEM）、布鲁诺尔-埃米特-泰勒（BET）分析、x射线衍射（XRD）、傅里叶变换红外光谱（FTIR）和紫外-可见漫反射光谱（DRS）对纳米复合材料进行了表征。以亚甲基蓝为模型有机污染物，评价了其在日光照射下的光催化降解性能。FE-SEM图像证实了TiO2 NPs在SWCNTs束内的有效分散，而FTIR分析证实了TiO2 NPs和SWCNTs的结合。加入SWCNTs将TiO2的光吸收从紫外光扩展到可见光范围，与TiO2相比，增强了太阳光下的光催化降解能力。Tauc图分析显示，TiO2纳米复合材料的间接能带隙为3.24 eV，而质量比为1:5的SWCNTs/TiO2纳米复合材料的直接能带隙为1.22 eV。SWCNTs/TiO2纳米复合材料（1:5）的比表面积最高。光催化实验与此比例实现了高达99%的亚甲基蓝去除60分钟的阳光照射。此外，SWCNTs可以在2小时内加速TiO2 NPs污泥的形成。SWCNTs支持的TiO2污泥在催化应用中可重复使用，有助于最大限度地减少废物处理问题。

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引用次数: 0

Inverting g(r) to u(r): The test-particle insertion method 将g(r)逆化为u(r)：测试粒子插入法

Q3 Materials Science

JCIS open

Pub Date : 2025-09-25 DOI: 10.1016/j.jciso.2025.100156

Clare R. Rees-Zimmerman , Angus Heafield , Daniel Ellerbeck , Adam Edward Stones , Roel P.A. Dullens , Dirk G.A.L. Aarts

Inverting the radial distribution function,

g (r)

, to a pair potential,

u (r)

, can be achieved by a variety of methods. Test-particle insertion has recently emerged as an efficient inverse method for finding

u (r)

. The method can analyse both simulated and experimental data, and the only input required is equilibrium snapshots of particle coordinates. This paper explains the method in detail and its implementation, sharing example code. We demonstrate intricacies in the number and placement of test particles and their effect on efficiency, as well as practical advice for applying the method to experimental data. This includes strategies and code for dealing with non-periodic boundary conditions, choice of inversion cutoff distance and the effect of particles sticking. We also discuss how the method performs at higher density and its limitations.

将径向分布函数g(r)转化为对势u(r)，可以通过多种方法实现。测试粒子插入最近成为一种求u(r)的有效逆方法。该方法可以同时分析模拟数据和实验数据，并且只需要输入粒子坐标的平衡快照。本文详细说明了该方法及其实现，并给出了示例代码。我们演示了测试粒子的数量和放置及其对效率的影响的复杂性，以及将该方法应用于实验数据的实用建议。这包括处理非周期边界条件的策略和代码、反演截止距离的选择和粒子粘附的影响。我们还讨论了该方法在高密度下的性能及其局限性。

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引用次数: 0

A novel eco-friendly method for synthesizing silver nanoparticles (AgNPs)-decorated chitosan film having high antibacterial efficacy 一种新型的环保方法合成具有高抗菌效果的银纳米粒子修饰壳聚糖膜

Q3 Materials Science

JCIS open

Pub Date : 2025-09-09 DOI: 10.1016/j.jciso.2025.100155

Sri Juari Santosa , Muhammad Hadi , Adhi Dwi Hatmanto , Salwaa Mumtaazah Darmanastri , Eny Kusrini , Khoirina Dwi Nugrahaningtyas , Anwar Usman

A novel eco-friendly method was established to synthesize ultra-small silver nanoparticles (AgNPs)-decorated chitosan films with strong antibacterial activity. The AgNPs were produced by reducing AgNO₃ with glucose derived from sucrose hydrolysis under alkaline conditions (pH ∼12.06) in a chitosan matrix, yielding spherical particles (∼8.6 nm) at an optimal 1:4 Ag⁺ to sucrose molar ratio. Mixing the resulting Chit-AgNPs colloid with glycerol in equal volumes produced a biodegradable Chit-AgNPs/G1 film with mechanical properties that meet biodegradable plastic standards. Antibacterial tests against B. subtilis and E. coli revealed that the film exhibited markedly higher efficacy than its precursors and was comparable or even superior to standard controls (amoxicillin and betadine). Overall, the Chit-AgNPs/G1 film demonstrates exceptional antibacterial performance, positioning it as one of the most effective chitosan–AgNP composites reported to date.

建立了一种新型的环保方法，合成了具有强抗菌活性的超小银纳米颗粒修饰壳聚糖膜。AgNPs是在碱性条件下（pH ~ 12.06）用蔗糖水解得到的葡萄糖在壳聚糖基质中还原AgNO3制备的，以最佳的1:4 Ag+与蔗糖的摩尔比生成球形颗粒（~ 8.6 nm）。将所得的Chit-AgNPs胶体与等体积的甘油混合，制成可生物降解的Chit-AgNPs/G1薄膜，其机械性能符合可生物降解塑料标准。对枯草芽孢杆菌和大肠杆菌的抑菌试验表明，该薄膜的效果明显高于其前体，与标准对照（阿莫西林和倍他定）相当，甚至优于后者。总的来说，chit - agnp /G1薄膜表现出卓越的抗菌性能，使其成为迄今为止报道的最有效的壳聚糖- agnp复合材料之一。

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引用次数: 0

Influence of wettability on diffusion limited nanoparticle adsorption at gas-liquid interfaces 润湿性对扩散受限纳米颗粒在气液界面吸附的影响

Q3 Materials Science

JCIS open

Pub Date : 2025-09-06 DOI: 10.1016/j.jciso.2025.100154

Hangyu Chen , Xiaodong Jia , Michael Fairweather , Timothy N. Hunter

This study investigates the influence of hydrophobicity on particle adsorption by examining the behavior of hydrophobized silica particles at air-water interfaces. Langmuir-Blodgett (LB) trough studies of butanol (‘SiO-butane’) and hexanol (‘SiO-hexane’) esterified particles provided contrasting behavior. The SiO-butane particles formed weaker particle layers that underwent partial collapse with compression, leading to formations significantly below hexagonal close-packed estimates. In contrast, the SiO-hexane particles exhibited improved monolayer behavior and longer-range stability. Droplet surface tensions demonstrated that the hydrophobic particles significantly altered the dynamic tension during adsorption, when methyl isobutyl carbinol (MIBC) was added as a co-surfactant. Short-term modeling elucidated the role of diffusion and energy barriers on adsorption dynamics, with SiO-hexane having reduced diffusion coefficients with respect to SiO-butane and unmodified particles. Despite this reduced diffusion, long-term modeling allowed calculation of adsorption coefficients (k_a), which for SiO-hexane particles were ∼200 × greater than for unmodified particles at low 0.1 wt% particle concentrations and over 1000 × greater at 2 wt%. Overall, the results provide quantitative insights into the profound influence of hydrophobicity on particle adsorption, particularly in crowded surface environments. Importantly, a diffusion-only mechanism is inadequate to explain adsorption dynamics for these larger colloids and the gravity-driven contribution must be considered in early-stage kinetics.

本研究通过观察疏水性二氧化硅颗粒在空气-水界面的行为，探讨了疏水性对颗粒吸附的影响。Langmuir-Blodgett （LB）通过研究丁醇（‘ sio -丁烷’）和己醇（‘ sio -己烷’）酯化颗粒提供了对比的行为。sio -丁烷颗粒形成了较弱的颗粒层，这些颗粒层在压缩过程中经历了部分坍塌，导致地层明显低于六方紧密堆积的估计。相比之下，sio -己烷颗粒表现出更好的单层行为和更长的范围稳定性。液滴表面张力表明，当加入甲基异丁基甲醇（MIBC）作为助表面活性剂时，疏水颗粒在吸附过程中显著改变了动态张力。短期模型阐明了扩散和能量势垒对吸附动力学的作用，硅己烷相对于硅丁烷和未修饰的颗粒具有降低的扩散系数。尽管这种扩散减少了，但长期建模允许计算吸附系数（ka），在低0.1 wt%的颗粒浓度下，sio -己烷颗粒的吸附系数比未改性颗粒大200倍，在2 wt%的颗粒浓度下，吸附系数比未改性颗粒大1000倍以上。总的来说，这些结果为疏水性对颗粒吸附的深刻影响提供了定量的见解，特别是在拥挤的表面环境中。重要的是，仅扩散机制不足以解释这些较大胶体的吸附动力学，在早期动力学中必须考虑重力驱动的贡献。

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引用次数: 0

Cross-linked chitosan-argan nutshell bio-composite beads: Optimization using Box-Behnken design and adsorption mechanism for Pb (II) and Cd (II) removal 交联壳聚糖-坚果壳生物复合微球：Box-Behnken设计优化吸附Pb （II）和Cd （II）的机理

Q3 Materials Science

JCIS open

Pub Date : 2025-09-04 DOI: 10.1016/j.jciso.2025.100152

Fatima Zahra Falah , Touria El Ghailassi , Samia Yousfi , Ahmed Moussaif , Mohamed Essalhi , Hasna Hamdane , Mouna Latifa Bouamrani

Industrial heavy metal contamination in water poses a significant threat to both the environment and human health, necessitating the development of affordable and effective remediation solutions. This study introduces a novel chitosan–argan nutshell bio-composite bead cross-linked in situ with glutaraldehyde (CS/ANS@GA), which exhibits enhanced mechanical stability and serves as an eco-friendly adsorbent for the efficient removal of Pb (II) and Cd(II). The bio-composite beads were thoroughly characterized using swelling tests, XRD, FTIR, and SEM-EDX, confirming their semi-crystalline structure and functionalities, as well as their high porosity and accessible adsorption active sites. Response surface methodology was employed to optimize the effects of pH, adsorbent dose, and contact time to achieve high removal efficiencies of Pb (II) and Cd (II). The synthesized beads exhibited Sips isotherm behavior, indicating a heterogeneous surface with maximum adsorption capacities of 433 mg g⁻¹ (Pb) and 391 mg.g⁻¹ (Cd). Thermodynamic analysis revealed an endothermic and spontaneous process, while Avrami kinetics suggested a complex adsorption mechanism involving pore diffusion, electrostatic interactions, and hydrogen bonding. Remarkably, the CS/ANS@GA beads maintained an efficiency of over 90 % after three adsorption–desorption cycles. These results highlight the potential of CS/ANS@GA beads as a sustainable, high-performance material for removing heavy metals from water.

水中的工业重金属污染对环境和人类健康构成重大威胁，因此有必要制定负担得起的有效补救办法。本研究介绍了一种新型的壳聚糖-坚果果壳生物复合材料-戊二醛原位交联（CS/ANS@GA），该材料具有增强的机械稳定性，是一种高效去除Pb （II）和Cd（II）的环保吸附剂。通过膨胀测试、XRD、FTIR和SEM-EDX对生物复合微珠进行了全面表征，证实了它们的半晶结构和功能，以及它们的高孔隙率和可接近的吸附活性位点。采用响应面法优化了pH、吸附剂剂量和接触时间对Pb （II）和Cd （II）去除效果的影响。合成的微球表现出Sips等温行为，表明其表面不均匀，最大吸附量为433 mg g−1 （Pb）和391 mg g−1 （Cd）。热力学分析表明吸附过程为吸热自发过程，而Avrami动力学分析表明吸附机制复杂，包括孔隙扩散、静电相互作用和氢键。值得注意的是，经过三次吸附-解吸循环后，CS/ANS@GA微球的效率保持在90%以上。这些结果突出了CS/ANS@GA微珠作为一种可持续的高性能材料去除水中重金属的潜力。

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引用次数: 0

Nano modified kaolin-based materials and their application: A review 纳米改性高岭土基材料及其应用综述

Q3 Materials Science

JCIS open

Pub Date : 2025-09-03 DOI: 10.1016/j.jciso.2025.100153

Kedir Seid Mohammed , Minaleshewa Atlabachew , Getahun Worku Derbie , Biniam Abdu Berhie

Kaolin, a natural clay mineral characterized by its kaolinite layers and silicate structure, exhibits high adsorbent properties, a low specific surface area, exceptional stability, and environmental friendliness. These attributes make kaolinite suitable for a wide range of applications. Conversely, the limited surface hydroxyl groups, low ion exchange capacity, and inability to absorb visible light indicate that pure kaolin or kaolinite is not an effective material for photocatalysis and performs inadequately in other applications. Fortunately, the unique physical and chemical properties of kaolinite render it as a suitable semiconductor carrier. By utilizing kaolin as a carrier, the poor activity, narrow spectral response, and limited electron transport of pure photocatalysts can be addressed, while also restricting the aggregation of nanoparticles. Thus, the usage of pure kaolin/kaolinite as a catalyst and adsorbent demonstrates to improve adsorption and catalytic performance, many modification techniques are now used, such as heat treatment (increases its surface area and porosity), acid modification (boosts the availability of active sites for improved adsorption and catalytic reactions), metal modification (introduces additional active sites), inorganic modification (improve thermal stability and photocatalytic performance), and organic modification (increase hydrophobicity). This review paper offers a structured overview of the use of kaolinite-supported nanocomposites across various applications, including adsorption, photocatalytic pollutant degradation, catalytic degradation, and antibacterial and antioxidant activities. The review also demonstrates the effectiveness and methods of combining nanomaterials with naturally occurring or modified kaolinite, as well as the limitations of kaolinite's present application and the mechanics underlying adsorption, catalytic, photocatalytic techniques and pollutant removal.

高岭土是一种天然粘土矿物，具有高岭石层和硅酸盐结构，具有高吸附性、低比表面积、优异的稳定性和环境友好性。这些特性使高岭石适用于广泛的应用。相反，有限的表面羟基、低离子交换能力和不能吸收可见光表明，纯高岭土或高岭石不是光催化的有效材料，在其他应用中表现不佳。幸运的是，高岭石独特的物理和化学性质使其成为合适的半导体载体。利用高岭土作为载体，可以解决纯光催化剂活性差、光谱响应窄、电子传递受限的问题，同时也限制了纳米颗粒的聚集。因此，使用纯高岭土/高岭土作为催化剂和吸附剂可以改善吸附和催化性能，现在使用了许多改性技术，如热处理（增加其表面积和孔隙度），酸改性（提高活性位点的可用性，以改善吸附和催化反应），金属改性（引入额外的活性位点），无机改性（提高热稳定性和光催化性能），和有机改性（增加疏水性）。本文综述了高岭石纳米复合材料在各种应用中的应用，包括吸附、光催化污染物降解、催化降解、抗菌和抗氧化活性。综述了纳米材料与天然高岭石或改性高岭石结合的有效性和方法，以及高岭石目前应用的局限性以及吸附、催化、光催化技术和污染物去除的机理。

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引用次数: 0

Exploring the potential antibacterial mechanism of the goose eggshell-derived CaO nanoparticles for deactivation of pharmaceutical wastages and bacteria 探讨鹅蛋壳制备的氧化钙纳米颗粒对药物废物和细菌失活的潜在抑菌机制

Q3 Materials Science

JCIS open

Pub Date : 2025-08-27 DOI: 10.1016/j.jciso.2025.100151

Priyanshu Kumar Singh , J. Sunil

Environmental contamination caused by pharmaceutical residues and textile dye effluents poses significant challenges due to their chemical stability, toxicity, and resistance to conventional treatment methods. This study investigates the green synthesis of calcium oxide (CaO) NPS derived from goose eggshells via thermal decomposition at 900 °C, and evaluates their efficacy in photocatalytic degradation and antibacterial applications. Comprehensive characterization using XRD, FTIR, FESEM, UV–Vis studies confirmed the successful formation of phase-pure, highly crystalline CaO NPS with an average particle size of 47.9 nm and a direct optical bandgap of 3.41 eV. The photocatalytic performance of the synthesized CaO Nanoparticles (NPs) was assessed through the degradation of Safranin dye (a model cationic dye) and the pharmaceutical compound Paracetamol under natural sunlight. The NPS achieved degradation efficiencies of 97.43 % for Safranin and 91.25 % for Paracetamol, following pseudo-first-order kinetics. The degradation rate constant for Safranin (2.896 × 10⁻² min⁻¹) was higher than that for Paracetamol (1.551 × 10⁻² min⁻¹), likely due to more favourable adsorption and stronger electrostatic interactions between the cationic dye molecules and the negatively charged CaO surface. In addition to their photocatalytic properties, the CaO NPS demonstrated significant antibacterial activity, particularly against Gram-positive Staphylococcus aureus, with a maximum zone of inhibition of 19.4 mm. The enhanced antibacterial performance is attributed to the nanoscale size, high surface reactivity, and the alkaline nature of CaO, which collectively disrupt bacterial membrane integrity. Overall, this work underscores the potential of bio-waste-derived CaO NPS as an environmentally sustainable, cost-effective, and multifunctional material for the dual purpose of wastewater remediation and microbial control.

由于药物残留和纺织染料废水的化学稳定性、毒性和对常规处理方法的抗性，它们对环境污染构成了重大挑战。本研究以鹅蛋壳为原料，在900℃下进行热分解绿色合成氧化钙（CaO） NPS，并评价其光催化降解和抗菌性能。通过XRD、FTIR、FESEM、UV-Vis等综合表征，成功制备出相纯、高结晶的CaO NPS，平均粒径为47.9 nm，直接光学带隙为3.41 eV。通过在自然光照下对红色素（一种模型阳离子染料）和药物化合物扑热息痛的降解，评价了合成的CaO纳米颗粒（NPs）的光催化性能。NPS对红花素的降解效率为97.43%，对扑热息痛的降解效率为91.25%，符合准一级动力学。红花素的降解速率常数为2.896 × 10−2 min−1，高于扑热息痛的降解速率常数（1.551 × 10−2 min−1），这可能是由于阳离子染料分子与带负电的CaO表面之间具有更有利的吸附和更强的静电相互作用。除了光催化性能外，CaO NPS还表现出显著的抗菌活性，特别是对革兰氏阳性金黄色葡萄球菌，其最大抑制区为19.4 mm。增强的抗菌性能归因于CaO的纳米级尺寸、高表面反应性和碱性，这些因素共同破坏了细菌膜的完整性。总的来说，这项工作强调了生物废物来源的CaO NPS作为一种环境可持续、成本效益高的多功能材料的潜力，可用于废水修复和微生物控制的双重目的。

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引用次数: 0

Effect of pH on photocatalytic degradation of methylene blue in water by facile hydrothermally grown TiO2 nanoparticles under natural sunlight pH对自然光照下易水热生长TiO2纳米颗粒光催化降解水中亚甲基蓝的影响

Q3 Materials Science

JCIS open

Pub Date : 2025-08-26 DOI: 10.1016/j.jciso.2025.100150

Uttama Kumar Saint , Suresh Chandra Baral , Dilip Sasmal , P. Maneesha , Sayak Datta , Farzana Naushin , Somaditya Sen

Each year, the production of synthetic dye wastewater reaches a trillion tons. This poses a significant global challenge of water scarcity. Hence, wastewater must be treated to reverse to useable water and prevent water scarcity. Failing to achieve this reversal increases ecotoxicological risks and human health. Textile wastewater contains harmful dyes. Photocatalytic degradation of these dye-contaminated wastewater is one of the major pathways in achieving reversal. However, this process is time-consuming, requires high-power lamps, and is expensive. Here, we report the effect of TiO₂ nanostructures prepared by facile hydrothermal synthesis on the dye degradation of one of the most common industrial textile dyes, methylene blue (MB), under natural sunlight. The impact of particle size on the photocatalytic activity and photocarrier migration rate was thoroughly examined. The size and surface morphology of the TiO₂ nanostructures depended on the concentration of the precursor during synthesis. Also, the effect of the pH of the dye solution on adsorption and photocatalytic degradation has been evaluated. With several optimized conditions, almost complete dye degradation was achieved within 40 min under the direct illumination of natural sunlight. The enhanced photocatalytic performance could correlate to the synergetic effect of a higher charge transfer mechanism, good catalytically active surface area availability (386 m²/g), and several optimized parameters that affect the reaction efficacy. Additionally, repeated use of NPs (five times) without sacrificing performance confirmed their stability and sustainability as a promising candidate for large-scale industrial textile wastewater remedies.

每年，合成染料废水的产量达到一万亿吨。这构成了水资源短缺的重大全球挑战。因此，必须对废水进行处理，使其转化为可用的水，防止缺水。如果不能实现这种逆转，就会增加生态毒理学风险和人类健康。纺织废水中含有有害染料。光催化降解这些染料污染废水是实现逆转的主要途径之一。然而，这个过程耗时，需要大功率灯，而且价格昂贵。在这里，我们报道了通过易水热合成制备的TiO2纳米结构对天然日光下最常见的工业纺织品染料之一亚甲基蓝（MB）的染料降解的影响。研究了粒径对光催化活性和光载流子迁移速率的影响。合成过程中前驱体的浓度决定了TiO2纳米结构的大小和表面形貌。同时，考察了染料溶液pH对吸附和光催化降解的影响。经过几个优化条件，在自然光直接照射下，染料在40分钟内几乎完全降解。光催化性能的增强可能与较高的电荷转移机制、良好的催化活性表面积（386 m2/g）以及影响反应效果的几个优化参数的协同作用有关。此外，在不牺牲性能的情况下重复使用NPs（五次）证实了它们的稳定性和可持续性，是大规模工业纺织废水补救的有希望的候选者。

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引用次数: 0

Foam-based microbially-induced calcite precipitation 基于泡沫的微生物诱导方解石沉淀

Q3 Materials Science

JCIS open

Pub Date : 2025-08-25 DOI: 10.1016/j.jciso.2025.100145

Margaux Ceccaldi , Coralie Menuisier , Vincent Langlois , Marielle Guéguen , Yoan Péchaud , Daniel Grande , Sébastien Vincent-Bonnieu , Olivier Pitois

Building on the development history of the Microbially Induced Calcite Precipitation (MICP) method and recent insights into the organization of liquid and bubbles within pore spaces filled with liquid foam, we hypothesize a potential synergy between MICP and liquid foam for enhancing soil properties. We assess the respiration and calcification capabilities of the bacterium Sporosarcina pasteurii in various foaming solutions formulated with bio-based surfactants. The most promising formulations are then used for in-situ observations of bacteria-induced calcification within foam-embedded 2D granular packings. We observe that maltoside-type AlkylPolyGlucosides with relatively short chains, in particular, enable optimal calcification in less than an hour. In the granular packing, the foam spontaneously creates liquid zones enriched with bacteria at the inter-grain contacts. As a result, instead of being distributed across the entire porous space, calcification is localized in these zones, promoting the formation of solid bridges (CaCO

_{3}

). This suggests that the foam-based MICP method could represent a relevant variation of the original approach, though this remains to be confirmed at larger scales through mechanical testing on representative soil samples.

基于微生物诱导方解石沉淀（MICP）方法的发展历史和最近对液体泡沫填充的孔隙空间中液体和气泡组织的见解，我们假设MICP和液体泡沫之间存在潜在的协同作用，以增强土壤性质。我们评估了细菌的呼吸和钙化能力巴氏孢子孢杆菌在不同的发泡溶液配制的生物基表面活性剂。最有希望的配方随后被用于在泡沫嵌入的二维颗粒填料中原位观察细菌诱导的钙化。我们观察到具有相对较短链的麦芽糖型烷基多糖苷，特别是在不到一小时的时间内实现最佳钙化。在颗粒填料中，泡沫自发地在颗粒间接触处产生富含细菌的液体区。因此，钙化不是分布在整个多孔空间，而是局限于这些区域，促进了固体桥（CaCO3）的形成。这表明基于泡沫的MICP方法可以代表原始方法的相关变化，尽管这仍有待于通过对代表性土壤样品进行更大规模的机械测试来证实。

{"title":"Foam-based microbially-induced calcite precipitation","authors":"Margaux Ceccaldi , Coralie Menuisier , Vincent Langlois , Marielle Guéguen , Yoan Péchaud , Daniel Grande , Sébastien Vincent-Bonnieu , Olivier Pitois","doi":"10.1016/j.jciso.2025.100145","DOIUrl":"10.1016/j.jciso.2025.100145","url":null,"abstract":"<div><div>Building on the development history of the Microbially Induced Calcite Precipitation (MICP) method and recent insights into the organization of liquid and bubbles within pore spaces filled with liquid foam, we hypothesize a potential synergy between MICP and liquid foam for enhancing soil properties. We assess the respiration and calcification capabilities of the bacterium Sporosarcina pasteurii in various foaming solutions formulated with bio-based surfactants. The most promising formulations are then used for in-situ observations of bacteria-induced calcification within foam-embedded 2D granular packings. We observe that maltoside-type AlkylPolyGlucosides with relatively short chains, in particular, enable optimal calcification in less than an hour. In the granular packing, the foam spontaneously creates liquid zones enriched with bacteria at the inter-grain contacts. As a result, instead of being distributed across the entire porous space, calcification is localized in these zones, promoting the formation of solid bridges (CaCO<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>). This suggests that the foam-based MICP method could represent a relevant variation of the original approach, though this remains to be confirmed at larger scales through mechanical testing on representative soil samples.</div></div>","PeriodicalId":73541,"journal":{"name":"JCIS open","volume":"19 ","pages":"Article 100145"},"PeriodicalIF":0.0,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144917670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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