Next Materials最新文献_第8页

Wear resistance of smooth TiO2 coating obtained by anodic oxidation and sol-gel dip-coating combination 阳极氧化和溶胶-凝胶浸渍-涂层组合获得的光滑TiO2涂层的耐磨性

Next Materials

Pub Date : 2026-01-21 DOI: 10.1016/j.nxmate.2026.101609

Jonathan M. Schuster , María L. Vera , Carlos E. Schvezov , Mario R. Rosenberger

This study investigates the wear behavior of crystalline TiO₂ coatings on Ti-6Al-4V substrates: a sol-gel only film (TSS; thickness

\sim

90 nm) and a combined anodic-oxidation and sol-gel system (TASS; thickness

\sim

600 nm). Wear tests employed reciprocating ball-on-flat apparatus with a conical diamond counterface (hemispherical tip radius 10 µm) to replicate prosthetic-valve leaflet motion under dry, unlubricated conditions at service-like or higher sliding speeds and contact pressures (∼10 000 MPa). Tests were run at loads of 39, 78, 117 and 156 mN for 1–4 min. Wear scars and debris were examined qualitatively, while wear volume, wear rate and wear factor were quantified with statistical analysis and uncertainty propagation. At the lowest loads (39 and 78 mN), both TSS and TASS outperformed the bare Ti-6Al-4V, exhibiting significantly lower wear volumes. At 117 mN, TSS exhibited the highest wear volumes—attributed to abrasive TiO₂ debris—whereas TASS remained comparable to the bare alloy; at 156 mN, TASS maintained lower wear than TSS and matched the substrate. Coatings that did not fail—i.e., did not expose the Ti-6Al-4V surface—showed wear factors of

2 \times 10^{- 4}

to

3 \times 10^{- 4} m m^{3} N^{- 1} m ⁻ ¹

, consistent with literature. Wear-rate maps, created separately for bare Ti-6Al-4V, TSS and TASS by fitting wear rate versus load and time, illustrate each system’s load-time response and reveal that TASS extends the low-wear regime relative to TSS. These maps offer a predictive framework for optimizing coating design in durable biomedical devices.

本研究研究了Ti-6Al-4V衬底上结晶tio2涂层的磨损行为：仅溶胶-凝胶膜（TSS；厚度~ 90 nm）和阳极氧化和溶胶-凝胶复合体系（TASS；厚度~ 600 nm）。磨损测试采用带有锥形金刚石面（半球形尖端半径10 μ m）的往复球平装置，在干燥、无润滑的条件下，在类似于使用或更高的滑动速度和接触压力（~ 10,000 MPa）下，复制假体阀门小叶的运动。测试在39、78、117和156 mN的负荷下运行1-4分钟。对磨损痕和磨损屑进行定性检测，对磨损体积、磨损率和磨损因子进行统计分析和不确定性传播量化。在最低载荷（39和78 mN）下，TSS和TASS的性能都优于裸Ti-6Al-4V，磨损量明显降低。在117 mN时，TSS表现出最高的磨损体积（归因于磨料tio2碎屑），而TASS与裸合金相当；在156 mN时，TASS比TSS保持更低的磨损，并且与基体相匹配。涂层不会失效，即，没有暴露Ti-6Al-4V表面显示的磨损因子2×10−4至3×10−4mm3N−1m⁻¹，与文献一致。通过拟合磨损率与负载和时间的关系，分别为裸Ti-6Al-4V、TSS和TASS创建了磨损率图，说明了每个系统的负载时间响应，并揭示了TASS相对于TSS延长了低磨损状态。这些地图为优化耐用生物医学设备的涂层设计提供了预测框架。

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引用次数: 0

Evaluation of Desmodium adscendens (Sw.) DC. extract as an eco-friendly corrosion inhibitor for carbon steel in hydrochloric acid: Gravimetric with statistical modeling, electrochemical, and surface analysis 对降霜菊的评价直流。萃取物作为一种环保型碳钢在盐酸中的缓蚀剂：用统计模型、电化学和表面分析进行重量测定

Next Materials

Pub Date : 2026-01-21 DOI: 10.1016/j.nxmate.2026.101624

Awwal Abdullahi Adamu, Ogunkemi Risikat Agbeke Iyun, James Dama Habila

The development of sustainable corrosion mitigation strategies is essential for protecting metallic materials in aggressive environments. In this study, Desmodium adscendens (Sw.) DC. extract (DAPE) was investigated as a bio-based corrosion inhibitor for carbon steel in hydrochloric acid. A central composite design integrated with response surface methodology (CCD–RSM) was employed to quantify and optimize the combined effects of acid concentration, temperature, inhibitor concentration, and immersion time on weight loss (WL), corrosion rate (CR), and inhibition efficiency (IE). The resulting quadratic models exhibited high statistical reliability and predictive accuracy (R² = 0.9881 for WL, 0.9743 for CR, and 0.9685 for IE). Analysis of variance identified acid concentration and temperature as the dominant factors accelerating corrosion, whereas increasing DAPE concentration significantly reduced WL and CR while enhancing IE. Optimal inhibition performance was achieved at 0.80 g/L DAPE in 2 M HCl at 323 K, yielding WL = 0.027 g, CR = 0.0011 g·cm⁻²·h⁻¹ , and IE = 85.02 %. Numerical optimization predicted comparable values (WL = 0.027 g; CR = 0.0010 g·cm⁻²·h⁻¹; IE = 85.32 %), which were experimentally validated within a 95 % confidence interval. Electrochemical impedance spectroscopy and potentiodynamic polarization analyses confirmed that corrosion inhibition occurs through adsorption of DAPE phytochemicals, forming a compact, adherent, and electrically resistive interfacial film that suppresses both anodic dissolution and cathodic hydrogen evolution. The inhibitor exhibited mixed-type behavior without altering the intrinsic corrosion mechanism. Surface morphology analysis further corroborated the formation of a smooth and protective layer on the steel surface. These findings demonstrate the potential of DAPE extract as an effective, sustainable, and environmentally benign corrosion inhibitor for carbon steel in acidic media.

制定可持续的缓减腐蚀战略对于在腐蚀性环境中保护金属材料至关重要。在本研究中，梧桐树(Sw.；直流。研究了提取液（DAPE）作为生物基缓蚀剂对碳钢在盐酸中的缓蚀作用。采用响应面法（CCD-RSM）的中心复合设计来量化和优化酸浓度、温度、缓蚀剂浓度和浸泡时间对减重（WL）、腐蚀速率（CR）和缓蚀效率（IE）的综合影响。所得二次型模型具有较高的统计信度和预测精度（R²= 0.9881 WL, 0.9743 CR, 0.9685 IE）。方差分析表明，酸浓度和温度是加速腐蚀的主要因素，而DAPE浓度的增加显著降低了WL和CR，提高了IE。在0.80时达到最佳的抑制性能 g / L DAPE在323 K 2 M盐酸,收益率西城= 0.027 g, CR = 0.0011 g·厘米⁻²·h⁻¹ ,和IE = 85.02 %。数值优化预测了可比较的数值（WL = 0.027 g; CR = 0.0010 g·cm⁻²·h⁻¹；IE = 85.32 %），在95% %的置信区间内得到了实验验证。电化学阻抗谱和动电位极化分析证实，DAPE的缓蚀作用是通过吸附植物化学物质，形成致密、粘附、电阻的界面膜来抑制阳极溶解和阴极析氢。缓蚀剂表现出混合型行为，但不改变其固有的腐蚀机制。表面形貌分析进一步证实了钢表面形成了光滑的保护层。这些发现证明了DAPE提取物在酸性介质中作为一种有效、可持续、环保的碳钢缓蚀剂的潜力。

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引用次数: 0

Microstructural and mechanical properties of alkaline-treated moonj fibre reinforced epoxy composite 碱处理月光纤维增强环氧复合材料的组织与力学性能

Next Materials

Pub Date : 2026-01-20 DOI: 10.1016/j.nxmate.2026.101625

Mohd Aman , Vivek Kumar , Rakesh Kumar Yadav , Manvandra Kumar Singh

Researchers are currently working to replace hazardous synthetic fibers with sustainable alternatives. The present work investigates the treatment of moonj fibre using sodium hydroxide (NaOH) followed by reinforcement with epoxy resin. Poor fiber-matrix adhesion and absorption of moisture are the main disadvantages of adopting natural fiber. These disadvantages of natural fibre may be improved by selection of an appropriate chemical treatment procedure. In the present work, moonj fibre is chemically treated with 1 %, 2 %, and 3 % NaOH for 4 hr. It has been found that fibers treated with 1 % NaOH for 4 h exhibit greater tensile strength compared to untreated fibers or those treated with different concentration. A hand lay-up process has been employed to develop moonj fibre reinforced epoxy composites with different fiber percentages (40 %, 50 %, and 60 %). This was done to investigate how the materials mechanical and morphological properties are impacted by the fiber contents and alkali treatment concentrations. The main findings of this study are the developed composites that have exhibited the better mechanical behaviour as compared to the pure epoxy matrix. The optimum tensile strength of 28.3 MPa, flexural strength of 121 MPa, and hardness value is 66.08 HV are observed for the composition of 50M50E composite (50 % moonj fibre and 50 % epoxy), respectively with strong interfacial bonding as well. According to the test results, moonj fibre reinforced composite is a good lightweight substitute for traditional materials in applications involving car bodies and aerospace. To determine the surface topography and texture of the developed composite, scanning electron microscope (SEM) is employed. The developed composite can be used for the sustainable lightweight structural applications such as automotive interior components, including panels, trims, and lightweight structural covers and household product casings such as furniture panels, decorative boards, and lightweight enclosures etc. The novelty of the research work is a uniquely optimizes NaOH treatment for moonj fibre and identifies 1 % NaOH for 4 h as the most effective for enhancing fibre matrix bonding. It also demonstrates, for the first time, that a 50 % moonj fibre-50 % epoxy composite delivers significantly improved tensile, flexural, and hardness properties. The present work highlights moonj fibre as a new sustainable reinforcement for lightweight semi-structural applications.

研究人员目前正致力于用可持续的替代品取代有害的合成纤维。本文研究了用氢氧化钠（NaOH）处理月球纤维，然后用环氧树脂增强。纤维与基体的附着力差、吸湿性差是采用天然纤维的主要缺点。天然纤维的这些缺点可以通过选择适当的化学处理方法加以改善。在本研究中，用1 %、2 %和3 %的NaOH对moonj纤维进行了4 小时的化学处理。研究发现，与未经处理的纤维或不同浓度的NaOH相比，1 % NaOH处理4 h的纤维具有更高的抗拉强度。采用手工铺层法制备了不同纤维含量（40% %、50% %和60% %）的月球纤维增强环氧复合材料。研究了纤维含量和碱处理浓度对材料力学和形态性能的影响。本研究的主要发现是开发的复合材料与纯环氧基相比具有更好的机械性能。50M50E复合材料（50% % moonj纤维和50% %环氧树脂）的最佳抗拉强度为28.3 MPa，抗折强度为121 MPa，硬度值为66.08 HV，界面结合良好。根据测试结果，moonj纤维增强复合材料在汽车车身和航空航天领域是传统材料的轻量级替代品。利用扫描电子显微镜（SEM）分析了复合材料的表面形貌和织构。所开发的复合材料可用于可持续轻量化结构应用，如汽车内饰组件，包括面板，饰边，轻质结构盖板和家用产品外壳，如家具面板，装饰板和轻质外壳等。该研究工作的新颖之处在于对moonj纤维的NaOH处理进行了独特的优化，并确定了1 % NaOH处理4 h对增强纤维基质结合最有效。它还首次证明了50% % moonj纤维- 50% %环氧树脂复合材料具有显著改善的拉伸、弯曲和硬度性能。目前的工作强调了月球纤维作为一种新的可持续增强轻量化半结构应用。

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引用次数: 0

Enhanced surface properties of coralline hydroxyapatite from natural resources of Depapre Coast, Papua 巴布亚Depapre海岸天然资源中珊瑚羟基磷灰石的增强表面性质

Next Materials

Pub Date : 2026-01-20 DOI: 10.1016/j.nxmate.2026.101628

Octolia Togibasa , Khaeriah Dahlan , Benny Abraham Bungasalu , Krista Maya Ansanay , Himawan , Lalu Panji Imam Agamawan

Hydroxyapatite (HAp) is gaining significant attention because of the structural similarity to bone mineral and versatile applications in both biomedical and environmental fields. Therefore, this study aimed to synthesize coralline HAp from dead coral collected along the Depapre coast, Papua, through calcination of coral powder and precipitation, followed by surface modification using potassium hydroxide (KOH) at two concentrations (0.5 M and 2.5 M). The structural and physicochemical properties of the materials were characterized by XRD, FTIR, SEM-EDS, and BET analyses. The results showed that CaCO₃ was successfully transformed into crystalline HAp with characteristic phosphate and hydroxyl groups, while SEM-EDS had porous morphologies and Ca/P ratios consistent with HAp. BET analysis showed that Depapre-derived coralline HAp had an exceptionally high surface area (>500 m²/g), significantly greater than typical values reported for synthetic HAp. Mild KOH activation (0.5 M) further enhanced porosity and adsorption-relevant surface properties, while concentrated treatment (2.5 M) led to partial re-carbonation and decreased surface area. These results showed that coral-derived HAp from Depapre provided a sustainable and highly porous material with promising potential for heavy metal adsorption and other environmental applications.

羟基磷灰石（Hydroxyapatite, HAp）因其结构与骨矿物相似，在生物医学和环境领域的广泛应用而受到广泛关注。因此，本研究旨在通过煅烧珊瑚粉和沉淀，然后用两种浓度（0.5 M和2.5 M）的氢氧化钾（KOH）进行表面改性，从巴布亚Depapre海岸收集的死珊瑚中合成珊瑚羟基磷灰石。采用XRD、FTIR、SEM-EDS和BET等分析手段对材料的结构和理化性质进行了表征。结果表明，CaCO3成功转化为具有特征磷酸和羟基的结晶HAp， SEM-EDS具有多孔形貌，Ca/P比值与HAp一致。BET分析显示，depapre衍生的珊瑚HAp具有异常高的表面积（>500 m²/g），显著大于合成HAp的典型值。轻度KOH活化（0.5 M）进一步提高了孔隙度和与吸附相关的表面性能，而高浓度处理（2.5 M）导致部分再碳化和表面积减少。这些结果表明，从Depapre提取的珊瑚衍生HAp是一种可持续的高多孔材料，在重金属吸附和其他环境应用方面具有很大的潜力。

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引用次数: 0

Impact of reprocessing cycles and chain extender on recycled polypropylene properties 后处理循环和扩链剂对再生聚丙烯性能的影响

Next Materials

Pub Date : 2026-01-20 DOI: 10.1016/j.nxmate.2026.101622

Daniel Barros , Fernando Leite , João Bessa , Vitor Carneiro , José P. Barbosa , Raul Fangueiro

The main aim of this work was to study the influence of recycled Polypropylene (rPP) incorporation into a polypropylene (PP) base material and the effect of chain extender addition on the mechanical performance of injected parts. The impact of multiple processing cycles (up to five) was also evaluated. Formulations with rPP contents up to 50 wt% were produced by twin-screw extrusion, pelletized, and then injected. For the most critical case (50 wt% rPP), a chain extender (1–3 wt%) was added to assess its effect on flexural properties and melt flow index (MFI). Differential scanning calorimetry (DSC) was performed to examine potential changes in thermal transitions. Results showed that rPP incorporation caused only a slight decrease in flexural strength, while the modulus and thermal behaviour remained stable. The addition of 1 wt% chain extender partially recovered flexural strength and improved stiffness, whereas higher contents offered no benefit. Reprocessing cycles led to small reductions in strength, but the chain extender mitigated these. Finally, a school chair was successfully injected using 50 wt% rPP with 1 wt% chain extender, confirming the feasibility of high rPP integration without changes to processing parameters.

本研究的主要目的是研究再生聚丙烯（rPP）掺入聚丙烯（PP）基材的影响，以及添加扩链剂对注塑件力学性能的影响。还评估了多个处理周期（最多五个）的影响。采用双螺杆挤压法制备rPP含量达50 wt%的配方，制粒后注射。对于最关键的情况（50 wt% rPP），添加扩链剂（1-3 wt%）以评估其对弯曲性能和熔体流动指数（MFI）的影响。差示扫描量热法（DSC）检查热转变的潜在变化。结果表明，rPP的掺入只会导致弯曲强度的轻微下降，而模量和热性能保持稳定。添加1 wt%扩链剂可以部分恢复材料的抗弯强度，提高材料的刚度，添加量再高则没有效果。再加工循环导致强度的小幅度降低，但扩链剂减轻了这些。最后，用50 wt%的rPP和1 wt%的扩链剂成功地注入了一把学校椅子，证实了在不改变加工参数的情况下实现高rPP集成的可行性。

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引用次数: 0

Evaluation of banana cellulose filler impacts on bioplastic films formulated from potato peel starch 香蕉纤维素填料对马铃薯皮淀粉制备生物塑料薄膜影响的评价

Next Materials

Pub Date : 2026-01-20 DOI: 10.1016/j.nxmate.2026.101611

Badhane Gudeta

The global proliferation of non-biodegradable plastic waste has necessitated the exploration of sustainable alternatives such as bioplastics. This study explores the development and characterization of biodegradable bioplastic films derived from potato peel starch (PPS), reinforced with banana pseudo-stem cellulose fiber (BPCF), both of which are underutilized agricultural wastes. Bioplastic films were produced by blending PPS with varying BPCF concentrations (0 %, 5 %, 10 %, 15 %, 20 %, and 25 % dry weight basis) and evaluated for their physicochemical, mechanical, and biodegradability properties. Fourier-transform infrared (FTIR) spectroscopy and X-ray Diffractometer (XRD) confirmed the presence of key functional groups and crystallinity respectively by indicating the successful interaction and structural integrity of the starch- cellulose matrix. The film with 15 % BPCF exhibited optimal performance, showing enhanced tensile strength (10.52 MPa), reduced moisture content (16.64 %), lower water solubility (26.22 %), and moderate acid-base resistance. Although its biodegradability (25.48 % in 15 days) was lower compared to the control (42.38 %), this reduction was attributed to increased crystallinity due to cellulose incorporation. The novelty of this work lies in the combined utilization of potato peel starch and banana pseudo-stem-derived cellulose, and in the comprehensive evaluation of chemical resistance. An area largely overlooked in previous studies. These results support the development of cost-effective, environmentally friendly bioplastics for sustainable packaging applications.

不可生物降解的塑料废物在全球范围内的扩散，使探索生物塑料等可持续替代品成为必要。本研究探讨了以马铃薯皮淀粉（PPS）为原料，以香蕉假茎纤维素纤维（BPCF）为增强材料的可生物降解生物塑料薄膜的开发和特性。通过将PPS与不同浓度的BPCF（0 %、5 %、10 %、15 %、20 %和25 %干重）混合制成生物塑料薄膜，并对其物理化学、机械和生物降解性能进行评价。傅里叶变换红外光谱（FTIR）和x射线衍射仪（XRD）分别证实了关键官能团和结晶度的存在，表明淀粉-纤维素基质的成功相互作用和结构完整性。当BPCF含量为15 %时，薄膜的抗拉强度提高（10.52 MPa），含水率降低（16.64 %），水溶性降低（26.22 %），耐酸碱性中等。虽然其生物可降解性（15天25.48 %）低于对照（42.38 %），但这种降低是由于纤维素掺入增加了结晶度。本工作的新颖之处在于马铃薯皮淀粉和香蕉假茎源纤维素的联合利用，以及对其耐化学性的综合评价。在以前的研究中很大程度上忽略了这一领域。这些结果支持开发成本效益高，环境友好的生物塑料用于可持续包装应用。

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引用次数: 0

Shear behaviour of soil reinforced with randomly distributed jute and coir fibres 随机分布的黄麻和椰子纤维加筋土的抗剪性能

Next Materials

Pub Date : 2026-01-20 DOI: 10.1016/j.nxmate.2026.101589

Samirsinh P. Parmar , Atindra Shukla

The incorporation of randomly distributed natural fibres into soil matrices offers a sustainable and cost-effective approach for enhancing the mechanical performance of geomaterials. This study presents a systematic experimental investigation of natural fibre–reinforced soil (RDFS), focusing on the use of jute and coir fibres as discrete reinforcements. The shear behaviour of unreinforced soil was directly compared with that of jute- and coir-reinforced specimens to quantify changes in cohesion and angle of internal friction. The results demonstrate that fibre inclusion significantly alters shear strength characteristics, with jute fibres predominantly enhancing frictional resistance, while coir fibres contribute to improvements in both cohesion and ductility. Consistent with existing literature and historical practices, the findings confirm that the addition of a small proportion of natural fibres leads to a substantial improvement in ductile behaviour, unconfined compressive strength, and resistance to cracking. Overall, the study highlights the considerable potential of RDFS as an effective and sustainable ground improvement technique for geotechnical applications.

将随机分布的天然纤维掺入土壤基质中，为增强岩土材料的力学性能提供了一种可持续和经济有效的方法。本研究对天然纤维增强土（RDFS）进行了系统的实验研究，重点研究了黄麻纤维和椰子纤维作为离散增强土的使用。将未加筋土与黄麻加筋和椰壳加筋土的抗剪特性进行直接比较，量化黏聚力和内摩擦角的变化。结果表明，纤维夹杂物显著改变了剪切强度特性，其中黄麻纤维主要增强了摩擦阻力，而椰子纤维有助于改善凝聚力和延展性。与现有文献和历史实践一致，研究结果证实，添加少量天然纤维可以显著改善延性、无侧限抗压强度和抗裂性。总体而言，这项研究突出了RDFS作为一种有效和可持续的岩土工程地基改善技术的巨大潜力。

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引用次数: 0

Additive manufacturing of Ti-Ni based ternary shape memory alloys Ti-Ni基三元形状记忆合金的增材制造

Next Materials

Pub Date : 2026-01-19 DOI: 10.1016/j.nxmate.2026.101614

Yitao Chen, Frank Liou

Metal additive manufacturing has become a powerful tool to develop customized metal alloys and to discover more advanced properties for novel extended applications. Ti-Ni based shape memory alloy is a group of intriguing smart functional materials, and adding a small amount of a third element can promote and induce more attractive functions. Due to the difficulty in traditional processing and the unique feature of material flexibility of in-situ alloying in additive manufacturing processes, not only Ti-Ni binary shape memory alloys but also Ti-Ni-X ternary shape memory alloys can be developed, manufactured, and investigated in-depth by additive manufacturing. This paper provides a brief review of the development of Ti-Ni based ternary shape memory alloys using metal additive manufacturing. The research status regarding a variety of Ti-Ni-X ternary alloys was summarized based on the classification of the two most widely used metal additive manufacturing processes: directed energy deposition and powder bed fusion. The main manufacturing issues were discussed and suggested, and the recommended research directions were made for future development.

金属增材制造已经成为开发定制金属合金和为新的扩展应用发现更先进性能的强大工具。Ti-Ni基形状记忆合金是一组有趣的智能功能材料，添加少量的第三元素可以促进和诱导出更有吸引力的功能。由于传统工艺的难加工性和增材制造工艺原位合金化材料柔韧性的独特特点，不仅可以开发、制造Ti-Ni二元形状记忆合金，还可以开发、制造Ti-Ni- x三元形状记忆合金，并对其进行深入研究。本文综述了金属增材制造技术在Ti-Ni基三元形状记忆合金中的应用进展。在对目前应用最广泛的两种金属增材制造工艺——定向能沉积和粉末床熔合工艺进行分类的基础上，综述了各种Ti-Ni-X三元合金的研究现状。对主要制造问题进行了讨论和建议，并提出了今后发展的研究方向。

引用次数: 0

Porous biochar activated with KOH and K2CO3: Efficient antibiotic adsorption and antioxidant activity KOH和K2CO3活化的多孔生物炭：高效的抗生素吸附和抗氧化活性

Next Materials

Pub Date : 2026-01-19 DOI: 10.1016/j.nxmate.2026.101600

Neha Gautam , Gopal Das

The extensive presence of pharmaceutical contaminants provides a significant environmental challenge due to their toxicity and endurance in the aquatic environment. In this study, we developed a novel activated biochar (ABC) using a strong base (KOH) and a weak base (K₂CO₃) through an impregnation method to enhance the yield, surface functionality and adsorption efficiency of the raw biochar (DBC). The synthesized ABC demonstrated outstanding antioxidant properties and significantly developed porosity. Furthermore, this ABC exhibits enhanced removal of antibiotics (ampicillin, AMP; amoxicillin, AMX; and rifampicin, RFP) from wastewater in comparison to raw DBC. Notably, the ABC achieved equilibrium in just 5 min, indicating an extremely rapid adsorption process. The functional groups of ABC and AMP, AMX, and RFP exhibited substantial surface interaction as validated by FTIR. Additionally, ABC exhibited exceptional adsorption efficiency and demonstrated sustainable reusability over seven cycles. Therefore, this study highlights the potential for converting waste into wealth, offering dual benefits for waste management and pollutant remediation. It also helps achieve waste valorization and circular economy goals.

由于药物污染物在水生环境中的毒性和持久性，它们的广泛存在给环境带来了重大挑战。本研究以强碱（KOH）和弱碱（K2CO3）为原料，通过浸渍法制备了一种新型活性生物炭（ABC），以提高原料炭（DBC）的产率、表面功能和吸附效率。合成的ABC具有良好的抗氧化性能和显著的孔隙度。此外，与原料DBC相比，该ABC对废水中的抗生素（氨苄西林，AMP；阿莫西林，AMX和利福平，RFP）的去除效果更好。值得注意的是，ABC在5 min内达到平衡，表明吸附过程非常迅速。FTIR证实，ABC和AMP、AMX和RFP的官能团表现出明显的表面相互作用。此外，ABC表现出优异的吸附效率，并在7个循环中表现出可持续的可重复使用性。因此，本研究强调了将废物转化为财富的潜力，为废物管理和污染物修复提供了双重效益。它还有助于实现废物增值和循环经济目标。

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引用次数: 0

Silica derived from rice husk waste as anode material for lithium-ion battery: A comprehensive study 废稻壳二氧化硅作为锂离子电池负极材料的综合研究

Next Materials

Pub Date : 2026-01-16 DOI: 10.1016/j.nxmate.2026.101615

P.U. Nzereogu , A.D. Omah , F.I. Ezema , E.I. Iwuoha , A.C. Nwanya

This research investigates the synthesis and characterization of silica extracted from rice husks sourced from Adani in Enugu State, Nigeria, and its application in lithium-ion batteries. In this work, two methodologies for extracting SiO₂ from rice husk were explored: rice husk pre-treatment process (acid leaching) and rice husk post-treatment process (alkaline digestion). The rice husks underwent acid leaching with 10 % HCl, followed by calcination at temperatures ranging from 500°C to 800°C. The sample post-treatment involved alkaline digestion using a 1 N sodium hydroxide solution. Results from structural analysis showed a progressive increase in purity and amorphous properties of silica up to a calcination temperature of 700°C. At 800°C, crystalline forms of silica, such as cristobalite and tridymite, were observed. The post-treated samples, especially those calcined at 700°C (PT700), exhibited comparative higher purity. Electrochemical studies were carried out using Cyclic Voltammetry (CV), Galvanostatic Charge/Discharge (GCD) and Electrochemical Impedance Spectroscopy (EIS), and the results show that the post treated rice husk that was calcined at 700 °C (PT700) had the highest specific capacity of 913 mAh g⁻¹ at a current density of 100 mA g⁻¹ and retained ∼89 % of this capacity after 1000 charge-discharge cycles. The energy density of the PT700 sample was 302 Wh kg⁻¹ , demonstrating its potential as a viable alternative to graphite in lithium-ion battery applications. The study concludes that silica extracted from rice husks is a sustainable and efficient material for use in energy storage devices, offering significant advantages in terms of reactivity, surface area, and electrochemical performance.

本研究研究了从尼日利亚埃努古州阿达尼稻壳中提取二氧化硅的合成和表征及其在锂离子电池中的应用。研究了从稻壳中提取SiO2的两种方法：稻壳预处理法（酸浸法）和稻壳后处理法（碱消化法）。稻壳用10 % HCl酸浸，然后在500 ~ 800℃的温度下煅烧。样品后处理包括使用1 N氢氧化钠溶液进行碱性消化。结构分析结果表明，在煅烧温度达到700℃时，二氧化硅的纯度和无定形性质逐渐增加。在800℃时，观察到硅的结晶形式，如方石英和钇石。处理后的样品，特别是在700°C （PT700）下煅烧的样品，具有相对较高的纯度。利用循环伏安法（CV）、恒流充放电法（GCD）和电化学阻抗谱法（EIS）对稻壳进行了电化学研究，结果表明，在700 °C （PT700）下，在100 mA g−1的电流密度下，稻壳的比容量最高为913 mAh g⁻¹ ，在1000次充放电循环后，其比容量仍保持在89 %。PT700样品的能量密度为302 Wh kg⁻¹ ，表明其作为锂离子电池中石墨的可行替代品的潜力。该研究得出结论，从稻壳中提取的二氧化硅是一种可持续且高效的材料，可用于储能设备，在反应性、表面积和电化学性能方面具有显着优势。

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引用次数: 0