Materials Science and Engineering: B最新文献

Influence of the number of growth cycles on the solar-blind photoresponse of amorphous and crystalline Ga₂O₃ films by atomic layer deposition 原子层沉积法生长周期数对非晶和结晶Ga₂O₃薄膜日盲光响应的影响

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2025-12-20 DOI: 10.1016/j.mseb.2025.119125

Shaoqing Wang , Lulu Hu , Menglong Shi , Jiaqi Tian , Zhan Wang , Qin Lu , Xiangtai Liu , Haifeng Chen , Songang Peng

This study investigates the photodetection performance of amorphous Ga₂O₃ and crystalline films grown by atomic layer deposition with varying growth cycles (1000–7000 cycles). The fundamental difference in structural order – long-range in crystalline versus short-range in amorphous - governs their distinct optoelectronic behaviors. For amorphous Ga₂O₃ devices, photocurrent/responsivity nealrly saturates beyond a certain thickness. This limitation comes from low carrier mobility and short diffusion length due to abundant trap states. In contrast, crystalline Ga₂O₃ photodetectors show a monotonic increase in responsivity with film thickness, benefiting from its long-range order which contributes to a longer carrier diffusion length and superior charge collection efficiency. Consequently, for thinner films, the high photoconductive gain from carrier trapping in amorphous films leads to higher responsivity for amorphous Ga₂O₃ photodetecors. However, for thicker films, the photoresponsivity and response speed of crystalline Ga₂O₃ photodetectors are both superior to those of amorphous Ga₂O₃ photodetectors. These advantages can be attributed to the greater absorption depth and longer carrier diffusion length. This work establishes how the material phase (amorphous vs. crystalline) and film thickness jointly influence the performance of Ga₂O₃ photodetectors. The obtained results provide valuable insights for the design of Ga₂O₃ photodetectors.

本文研究了不同生长周期（1000-7000周期）下原子层沉积非晶Ga2O3和结晶膜的光探测性能。结构顺序的根本差异——晶体的长程与非晶的短程——决定了它们不同的光电行为。对于非晶Ga2O3器件，光电流/响应率在超过一定厚度时几乎饱和。这种限制是由于大量的阱态导致载流子迁移率低和扩散长度短。相比之下，晶体Ga2O3光电探测器的响应率随薄膜厚度呈单调增长，这得益于其长程有序，这有助于更长的载流子扩散长度和更优越的电荷收集效率。因此，对于更薄的薄膜，非晶薄膜中载流子捕获的高光导增益导致非晶Ga2O3光电探测器的响应率更高。然而，对于较厚的薄膜，晶体Ga2O3光电探测器的光响应率和响应速度都优于非晶Ga2O3光电探测器。这些优点可归因于更大的吸收深度和更长的载流子扩散长度。这项工作确定了材料相（非晶与晶体）和薄膜厚度如何共同影响Ga2O3光电探测器的性能。所得结果为Ga2O3光电探测器的设计提供了有价值的见解。

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引用次数: 0

Flexible bacterial cellulose membranes embedded with TiO2/Ag nanohybrids for sustainable pollutant degradation and trace detection 二氧化钛/银纳米杂化物包埋柔性细菌纤维素膜用于污染物的可持续降解和痕量检测

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2025-12-20 DOI: 10.1016/j.mseb.2025.119132

Long Phuoc Lieu , Thi Thanh Huyen Nguyen , Duy Thanh Phu Quan Dao , Vo Yen Nhi Pham , Van Han Dang , Trang H.D. Nguyen , Dinh Quan Nguyen

This study reports the fabrication of a flexible and multifunctional bacterial cellulose (BC) membrane embedded with TiO₂/Ag nanohybrids for dual applications in visible-light photocatalytic remediation and ultra-trace detection of malachite green (MG). The BC framework provided a highly porous nanofibrous scaffold that enabled uniform dispersion of TiO₂/Ag nanoparticles and enhanced adsorption of target molecules. Structural, morphological, and optical analyses confirmed successful formation of the hybrid system and highlighted the synergistic interactions among BC, TiO₂, and Ag, which significantly improved charge separation and visible-light absorption through plasmonic enhancement. As a result, the BC@TiO₂/Ag membrane achieved ∼80 % MG degradation within 120 min and followed pseudo-first-order kinetics, with hydroxyl and superoxide radicals identified as the primary active species. The material also displayed moderate recyclability over four catalytic cycles. As a SERS substrate, BC@TiO₂/Ag enabled sensitive and reproducible detection of MG from 10⁻³ to 10⁻⁸ M, achieving an enhancement factor on the order of 10⁸ and strong linearity across five orders of magnitude. Real-sample testing in fishpond water yielded recoveries of 86–104 % with acceptable RSD values. These findings demonstrate that the BC@ TiO₂/Ag composite is a sustainable, low-cost, and highly versatile platform for pollutant degradation and rapid on-site chemical sensing.

本研究报道了一种柔性多功能细菌纤维素（BC）膜的制备及其在可见光光催化修复和孔雀石绿（MG）超痕量检测中的双重应用。BC框架提供了一个高度多孔的纳米纤维支架，使TiO2/Ag纳米颗粒均匀分散，增强了靶分子的吸附。结构、形态和光学分析证实了杂化体系的成功形成，并强调了BC、TiO2和Ag之间的协同相互作用，通过等离子体增强显著改善了电荷分离和可见光吸收。结果，BC@TiO2/Ag膜在120分钟内实现了~ 80%的MG降解，并遵循准一级动力学，羟基和超氧自由基被确定为主要活性物质。该材料在四个催化循环中也显示出中等的可回收性。作为SERS底物，BC@TiO2/Ag能够在10−3至10−8 M范围内对MG进行灵敏和可重复性的检测，实现了108数量级的增强因子和5个数量级的强线性。鱼塘水样品回收率为86 ~ 104%，RSD值可接受。这些发现表明，BC@ TiO2/Ag复合材料是一种可持续、低成本、高度通用的污染物降解和快速现场化学传感平台。

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引用次数: 0

Harnessing activated biochar yeast@magnetic-TiO2@Brewer's yeast as an innovative nanobiosorbent for lanthanum (III) and basic blue 9 dye uptake from aquatic environment 利用活性生物炭yeast@magnetic-TiO2@酿酒酵母作为一种创新的纳米生物吸附剂，用于从水生环境中吸收镧（III）和碱性蓝9染料

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2025-12-19 DOI: 10.1016/j.mseb.2025.119139

Magda E. Abouelanwar, Amir M. Abdelfattah, Mohamed E. Mahmoud

Access to clean water is fundamental for life, yet growing industrialization and unchecked pollution are driving this vital resource toward crisis. Among the most troubling threats are synthetic dyes and rare earth elements, which often resist conventional treatment and persist in ecosystems with long-term toxic effects. In this study, we target two difficult contaminants lanthanum ions (La(III)) and the synthetic dye Basic Blue 9 (BB9-D) using an innovative biosorbent derived entirely from waste brewer's yeast (BY). The yeast biomass was first converted into activated biochar (ABY) through pyrolysis, followed by KOH-assisted microwave activation. This process yielded a highly porous, low-cost carbon material. To boost adsorption performance, ABY was further modified with magnetic TiO₂ nanoparticles, creating the hybrid composite BY@NM-TiO₂@ABY. The material combined the porosity of biochar with the magnetic activity of TiO₂, offering abundant active sites and enhanced structural disorder to capture pollutants effectively. Characterization via FTIR, SEM, EDX, XRD, and XPS confirmed a well-developed pore system and elemental composition of C (36.11 wt%), O (40.92 wt%), N (4.00 wt%), K (0.87 wt%), Fe (11.01 wt%), and Ti (6.01 wt%). Adsorption experiments showed impressive uptake capacities 319.47 mg g⁻¹ for La(III) and 17.97 mg g⁻¹ for BB9-D—following pseudo-second-order kinetics (R² up to 1.000) and fitting the Langmuir isotherm model. The removal processes were found to be efficient and spontaneous, while the regeneration and reusability tests of the investigated magnetic BY@NM-TiO₂@ABY nanobiosorbent for removal of La(III) and BB9-D after multiple cycles were slightly declined by 0.9 %, and 2.2 % for La(III) and BB9-D, respectively. Still, this study highlights a scalable, sustainable strategy for water purification by transforming brewery waste into a powerful nanobiosorbent for complex pollutants.

获得清洁的水是生命的基础，然而日益增长的工业化和不受控制的污染正在将这一重要资源推向危机。其中最令人不安的威胁是合成染料和稀土元素，它们通常抵抗常规处理，并在生态系统中持续存在，具有长期毒性作用。在这项研究中，我们使用一种完全从废啤酒酵母（BY）中提取的创新生物吸附剂，针对两种难处理的污染物镧离子（La(III)）和合成染料碱性蓝9 （BB9-D）。酵母生物质首先通过热解转化为活性生物炭（ABY），然后进行koh辅助微波活化。这个过程产生了一种高多孔性、低成本的碳材料。为了提高吸附性能，进一步用磁性tio2纳米颗粒修饰ABY，形成了混合复合材料BY@NM-TiO₂@ABY。该材料结合了生物炭的孔隙度和TiO 2的磁性活性，提供了丰富的活性位点和增强的结构无序性，可以有效地捕获污染物。通过FTIR、SEM、EDX、XRD和XPS表征，证实了孔隙系统发育良好，元素组成为C （36.11 wt%）、O （40.92 wt%）、N （4.00 wt%）、K （0.87 wt%）、Fe （11.01 wt%）和Ti （6.01 wt%）。吸附实验表明，吸附量为319.47 mg g−1的La（III）和17.97 mg g−1的bb9 - d符合拟二级动力学（R2高达1.000），符合Langmuir等温线模型。研究发现，该磁性BY@NM-TiO2@ABY纳米生物吸附剂在多次循环后对La（III）和BB9-D的去除率分别下降0.9%和2.2%，而对La（III）和BB9-D的去除率则略有下降。尽管如此，这项研究强调了一种可扩展的、可持续的水净化策略，通过将啤酒废水转化为强大的纳米生物吸附剂来处理复杂的污染物。

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引用次数: 0

Hierarchically engineered superhydrophilic Co3S4-MoO2 electrocatalyst for exceptional overall water splitting performance 分层设计的超亲水性Co3S4-MoO2电催化剂具有卓越的整体水分解性能

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2025-12-19 DOI: 10.1016/j.mseb.2025.119123

Priyanshu Chaubey, Subhajit Sarkar, Prashant Kr. Sharma

Herein, a superhydrophilic Co₃S₄-MoO₂ nanocomposite is synthesized via the hydrothermal method, having an interconnected morphology of MoO₂ hollow microspheres and Co₃S₄ dodecahedrons. For oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), the Co₃S₄-MoO₂ nanocomposite demonstrates remarkably low overpotentials of 266 mV in 1 M KOH solution and 244 mV in 0.5 M H₂SO₄ solution, respectively, at 10 mA/cm² with calculated Tafel slope values of 99.5 mV/dec for OER and 100.5 mV/dec for HER. The enhanced electrocatalytic activity is attributed to enlarged inner surface area, abundant active edges, superhydrophilic nature, and the synergistic electronic interactions between Co₃S₄ and MoO₂. For overall water splitting (OWS), the (Co₃S₄-MoO₂ || Co₃S₄-MoO₂) system achieves an impressive low cell voltage of 1.5 V at 10 mA/cm² in 1 M KOH solution. Notably, the Co₃S₄-MoO₂ catalyst exhibits remarkable durability for 96 h of continuous multi-step chronopotentiometry (MCP) operation up to a higher current density of 500 mA/cm². This governs the finding and importance of Co₃S₄-MoO₂ nanocomposite for next-generation water-splitting technologies.

本文通过水热法合成了一种超亲水性的Co3S4-MoO2纳米复合材料，具有MoO2空心微球和Co3S4十二面体相互连接的形貌。对于析氧反应（OER）和析氢反应（HER）， Co3S4-MoO2纳米复合材料在10 mA/cm2下，在1 M KOH溶液中表现出266 mV的过电位，在0.5 M H2SO4溶液中表现出244 mV的过电位，OER和HER的Tafel斜率分别为99.5 mV/dec和100.5 mV/dec。Co3S4的电催化活性增强是由于其内表面积增大、活性边丰富、超亲水性以及Co3S4与MoO2之间的协同电子相互作用所致。对于整体水分解（OWS），（Co3S4-MoO2 || Co3S4-MoO2）系统在1 M KOH溶液中在10 mA/cm2下实现了令人印象深刻的1.5 V低电池电压。值得注意的是，Co3S4-MoO2催化剂在高达500 mA/cm2的电流密度下，连续多步计时电位测定（MCP）操作96小时，表现出卓越的耐久性。这决定了Co3S4-MoO2纳米复合材料对下一代水分解技术的发现和重要性。

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引用次数: 0

Preparation of penta-twinned MoS2@C nanorods as a bifunctional electrocatalyst for overall water splitting 制备五孪MoS2@C纳米棒作为双功能电催化剂用于水的整体分解

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2025-12-19 DOI: 10.1016/j.mseb.2025.119131

T. Prakash , Meryam Chelly , R. Govindan , D. Murugesan , T. Krishnakumar , Giovanni Neri , RO. MU. Jauhar , John D. Rodney , Sindhur Joshi , Lavanya Rao , B. Ramachandra Bhat , N.K. Udayashankar

Efficient overall water splitting requires robust bifunctional electrocatalysts active for both the hydrogen and oxygen evolution reactions (HER and OER). Herein, we report the preparation of a penta-twinned MoS₂@C nanorod hybrid via a simple hydrothermal synthesis and evaluate its performance as a noble-metal-free bifunctional catalyst for water splitting. In this approach, MoS₂ nanosheets are grown hydrothermally and subsequently integrated with a glucose-derived carbon coating, followed by annealing at 600 °C under N₂ to induce a unique one-dimensional penta-twinned nanorod morphology. The MoS₂@C-600 nanorods exhibit abundant edge sites and improved electrical conductivity due to the intimate MoS₂–carbon coupling. Electrochemical measurements in 1.0 M KOH reveal that the MoS₂@C-600 catalyst delivers outstanding HER and OER activity, with a low overpotential of 133 mV (HER) and 204 mV (OER) required to reach 10 mA cm⁻². These values are much smaller than those for pristine MoS₂ (HER = 190 mV) and approach the performance of benchmark noble catalysts (Pt/C for HER, IrO₂ for OER). Tafel slope analysis indicates favorable reaction kinetics with a HER Tafel slope 120 mV dec⁻¹ and an exceptionally low OER Tafel slope (124 mV dec⁻¹), pointing to accelerated Volmer–Heyrovsky HER mechanism and fast water oxidation kinetics. The penta-twinned nanorod structure endows the composite with high structural integrity and a large electrochemically active surface area, which translates to sustained catalytic activity during prolonged operation. Overall, this work highlights a facile strategy to enhance MoS₂ is bifunctionality by carbon hybridization and structural engineering, yielding a highly active and durable electrocatalyst for overall water splitting.

高效的整体水分解需要强大的双功能电催化剂对氢和氧的析出反应（HER和OER）都有活性。在此，我们报告了通过简单的水热合成制备了五孪MoS2@C纳米棒杂化物，并评估了其作为无贵金属双功能水裂解催化剂的性能。在这种方法中，MoS 2纳米片是水热生长的，随后与葡萄糖衍生的碳涂层集成，然后在600°C下在N2下退火，以诱导独特的一维五孪晶纳米棒形貌。由于mos2 -碳的紧密耦合，MoS2@C-600纳米棒表现出丰富的边缘位点和提高的导电性。在1.0 M KOH下的电化学测量表明，MoS2@C-600催化剂具有出色的HER和OER活性，达到10 mA cm - 2所需的过电位为133 mV （HER）和204 mV （OER）。这些值远小于原始MoS2 (HER = 190 mV)，接近基准贵金属催化剂（HER为Pt/C， OER为IrO2）的性能。Tafel斜率分析表明，HER Tafel斜率为120 mV dec - 1，而OER Tafel斜率为124 mV dec - 1，这有利于反应动力学，表明Volmer-Heyrovsky HER机制和快速水氧化动力学加速。五孪纳米棒结构赋予了复合材料高的结构完整性和大的电化学活性表面积，这意味着在长时间的操作中持续的催化活性。总的来说，这项工作强调了通过碳杂化和结构工程来增强MoS2双功能的简单策略，从而产生了一种高活性和耐用的电催化剂，用于全面的水分解。

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引用次数: 0

Defect-engineered charge transport and dielectric relaxation in In/Se co-substituted CoNi spinel ferrite nanoparticles by sonochemical route in /Se共取代CoNi尖晶石铁氧体纳米粒子的缺陷工程电荷输运和介电弛豫

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2025-12-19 DOI: 10.1016/j.mseb.2025.119138

M.A. Almessiere , B. Ünal , A. Baykal , E. Mojtahedi , A. Mihmanlı , S. Kahraman

This study presents a comprehensive investigation into the influence of indium and selenium co-substitution on the structural, electrical, and dielectric properties of CoNi spinel ferrite nanoparticles (SFNPs) synthesized via the sol–gel auto-combustion method. The compositional series In/Se → CoNi (x ≤ 0.10) was examined through X-ray diffraction (XRD), electron microscopy. XRD analysis confirmed the formation of a single-phase cubic spinel structure with crystallite sizes below 10 nm, consistent with earlier findings (Ref. 11). The temperature- and frequency-dependent dielectric and impedance spectra reveal pronounced modifications in charge-carrier dynamics with increasing In/Se content. AC and DC conductivity analyses demonstrate thermally activated small-polaron hopping as the dominant mechanism, with activation energies decreasing from 0.33 to 0.08 eV upon substitution, indicating enhanced charge delocalization and reduced potential barriers. The 2D conductivity (σ), permittivity (ε'), and modulus (M*) lines highlight the transition from interfacial polarization–dominated behavior to defect-assisted hopping conduction at moderate substitution levels (x ≈ 0.06–0.08). Complex impedance and Cole–Cole analyses confirm non-Debye relaxation behavior with distinct grain, grain boundary, and interfacial contributions, successfully modeled using the R(CR)(CR)(CR) equivalent circuitry. Optimal co-doping induces improved conductivity, reduced impedance, and stabilized dielectric permittivity, establishing In/Se → CoNi spinel ferrites as promising candidates for energy-storage, high-frequency, and spintronic applications.

本研究全面研究了铟和硒共取代对溶胶-凝胶自燃烧法制备的CoNi尖晶石铁氧体纳米粒子（SFNPs）结构、电学和介电性能的影响。通过x射线衍射（XRD）、电子显微镜对其组成系列In/Se→CoNi （x≤0.10）进行了检测。XRD分析证实形成了晶粒尺寸小于10 nm的单相立方尖晶石结构，与早期发现一致（Ref. 11）。温度和频率相关的介电和阻抗谱显示，随着in /Se含量的增加，载流子动力学发生了明显的变化。交流和直流电导率分析表明，热激活的小极化子跳变是主要机制，取代后活化能从0.33 eV降低到0.08 eV，表明电荷离域增强，势垒降低。二维电导率（σ）、介电常数（ε’）和模量（M*）线强调了在中等取代水平（x≈0.06-0.08）下从界面极化主导行为到缺陷辅助跳变传导的转变。复杂阻抗和Cole-Cole分析证实了具有不同晶粒、晶界和界面贡献的非德拜松弛行为，并成功地使用R(CR)(CR)（CR）等效电路进行了建模。最佳共掺杂可提高电导率，降低阻抗，稳定介电常数，使In/Se→CoNi尖晶石铁氧体成为储能、高频和自旋电子应用的有前途的候选者。

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引用次数: 0

Surface morphology and residual stress analysis on 6H-SiC wafer induced by ultra-precision lapping 超精密研磨6H-SiC晶圆表面形貌及残余应力分析

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2025-12-18 DOI: 10.1016/j.mseb.2025.119116

Yinxia Zhang , Siyu Zhai , Shihao Li , Jianbo Wei , Wei Gao

This study reveals the surface damage mechanism of 6H-SiC (0001) wafers by comparing bonded abrasives and loose abrasives under abrasive sizes W7/W14/W28. Experiments used a ZYP300 lapping machine (0.014 MPa, 40 r/min, dry conditions). Surface morphology, roughness, and residual stress were analyzed. Results show: bonded abrasives produced scratches with low roughness (min Ra = 0.0505 μm) and uniform compressive stress, suppressing cracks; loose abrasives caused pits, high roughness (max Ra = 0.5792 μm), and tensile stress, exacerbating damage. When the abrasive grit size is reduced from W28 to W7, the surface roughness Ra of wafers processed by bonded abrasives and loose abrasives decreases by 56 % and 31 %, respectively. Concurrently, the lattice damage (characterized by Raman FWHM) also decreased correspondingly. Bonded abrasives significantly enhance surface quality and stress control.

通过比较W7/W14/W28磨料尺寸下粘结磨料和松散磨料对6H-SiC（0001）晶圆表面损伤机理的影响。实验采用ZYP300研磨机（0.014 MPa, 40 r/min，干燥条件）。分析了表面形貌、粗糙度和残余应力。结果表明：粘结磨料产生的划痕粗糙度低（最小Ra = 0.0505 μm），压应力均匀，具有抑制裂纹的作用；磨料疏松会产生凹坑、高粗糙度（最大Ra = 0.5792 μm）和拉应力，加剧损伤。当磨料粒度由W28减小到W7时，粘结磨料和松散磨料加工的硅片表面粗糙度Ra分别降低56%和31%。同时，晶格损伤（以拉曼FWHM表征）也相应减小。结合磨料显著提高表面质量和应力控制。

引用次数: 0

From waste to biomaterial: Valorization of keratin for 3D printing and bioprinting 从废物到生物材料：用于3D打印和生物打印的角蛋白的增值

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2025-12-18 DOI: 10.1016/j.mseb.2025.119135

Shreya Gupta, Swati Sharma, Bhuvnesh Kapoor

Three-dimensional (3D) printing is a revolutionary manufacturing technique that facilitates customization, adaptable modification, and expedited prototyping of structure-property interactions. The advancement of 3D bioprinting in tissue engineering has enabled the creation of 3D constructs that closely resemble biological tissues while exhibiting physiologically compatible properties with appropriate bioactive and mechanical qualities. However, the demand for bioinks surpasses their availability. Keratin is a group of intermediate filament proteins sourced from various biological materials such as human hair, chicken feathers, nails, horns, and hooves. Keratin-based materials possess desirable characteristics, including flexible degradation kinetics and intrinsic cell adhesion sequences, making them suitable tissue engineering scaffolds. The utilization of keratin-based printable biomaterials in 3D printing, presents exceptional opportunities for spatial control of the physicochemical characteristics of the scaffold, allowing for the functional customization that is difficult to achieve by conventional techniques. Despite these advantages, keratin-based 3D-printable formulations present non-trivial challenges due to their rheological properties, the requirement for high concentrations, and inherent structural hierarchies that provide these materials with robust mechanics and functionalities. This comprehensive review provides an overview of keratin and its association with 3D printing technologies. It encompasses a detailed study of the fabrication processes and diverse applications of 3D printed products based on keratin, and also offers insights into the potential and challenges associated with the utilization of keratin-based printable materials and bioinks in this cutting-edge manufacturing approach.

三维（3D）打印是一种革命性的制造技术，便于定制，适应性修改，并加快了结构-性能相互作用的原型设计。生物3D打印在组织工程领域的进步使得3D结构的创建与生物组织非常相似，同时表现出具有适当生物活性和机械质量的生理兼容特性。然而，对生物墨水的需求超过了它们的可用性。角蛋白是一组来源于人类头发、鸡毛、指甲、角和蹄等多种生物材料的中间长丝蛋白。角蛋白基材料具有理想的特性，包括灵活的降解动力学和固有的细胞粘附序列，使其成为合适的组织工程支架。基于角蛋白的可打印生物材料在3D打印中的应用，为支架的物理化学特性的空间控制提供了特殊的机会，允许通过传统技术难以实现的功能定制。尽管有这些优势，但基于角蛋白的3d打印配方由于其流变性能、对高浓度的要求以及固有的结构层次（这些结构层次为这些材料提供了强大的力学和功能）而面临着不小的挑战。这篇全面的综述提供了角蛋白及其与3D打印技术的关系的概述。它涵盖了基于角蛋白的3D打印产品的制造工艺和各种应用的详细研究，并提供了对这种尖端制造方法中基于角蛋白的可打印材料和生物墨水的利用相关的潜力和挑战的见解。

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引用次数: 0

Single-step sustainable few-layer graphene synthesis and its application in electrochemical sensing 单步可持续的少层石墨烯合成及其在电化学传感中的应用

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2025-12-18 DOI: 10.1016/j.mseb.2025.119126

Rosemary Johnson , Muhammad Adeel Zafar , Yang Liu , Mohan V. Jacob

Graphene is greatly acclaimed for its remarkable properties and structure, contributing to its versatile applications. The atmospheric pressure microwave plasma method is a relatively new technique used for graphene synthesis. This method is as simple as it can synthesise freestanding graphene at atmospheric pressure within seconds. The merit of this method is that it avoids the need for a substrate and extreme conditions of temperature and pressure. Hence, this method is environment-friendly and effective for graphene fabrication. This work focuses on the single-step synthesis of graphene using a sustainable precursor, camphor oil, an essential oil extracted from Cinnamomum camphora. The results showed a few layers of graphene, which were confirmed by Raman spectroscopy and transmission electron microscopy. The morphology of graphene was studied using scanning electron microscopy, and it was found to have a petal-like, tiny, curved surface. The presence of sp²-bonded carbon atoms was confirmed by X-ray photoelectron spectroscopy. The electrochemical sensing competence of the synthesised material was tested for nitrite, and it was found that the sensor exhibited a wide linear range of 15–2300 μM with a comparable detection limit of 15 μM.

石墨烯因其卓越的性能和结构而广受赞誉，有助于其广泛的应用。常压微波等离子体法是一种较新的石墨烯合成技术。这种方法非常简单，可以在几秒钟内在大气压下合成独立的石墨烯。这种方法的优点是它不需要衬底和极端的温度和压力条件。因此，该方法是一种环保且有效的石墨烯制备方法。这项工作的重点是利用一种可持续的前体——樟脑油——一种从樟树中提取的精油，一步合成石墨烯。结果显示了几层石墨烯，通过拉曼光谱和透射电子显微镜证实了这一点。利用扫描电子显微镜研究了石墨烯的形态，发现它具有花瓣状的微小弯曲表面。x射线光电子能谱证实了sp2键碳原子的存在。测试了合成材料对亚硝酸盐的电化学传感能力，发现该传感器具有15 ~ 2300 μM的宽线性范围，检测限为15 μM。

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引用次数: 0

Accelerated photocatalytic reduction of mercury(II) ions from water over Ag2O-sensitized MoO3/SiO2 nanophotocatalyst ag20敏化MoO3/SiO2纳米光催化剂对水中汞（II）离子的加速光催化还原

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B

Pub Date : 2025-12-17 DOI: 10.1016/j.mseb.2025.119127

Abeer A. Rajhi , Amal S. Basaleh , Naif S. Aljohani , Ahmed Shawky , Mostafa E. Salem , Reda M. Mohamed

Developing sustainable photocatalysts for the remediation of heavy metal contamination remains a critical environmental objective. Herein, we report a facile sol-gel synthesis of silver oxide (Ag₂O) nanoparticles impregnated onto silica-supported molybdenum trioxide (MoO₃/SiO₂) nanoflakes. Systematic optimization of the Ag₂O loading revealed that a 8 wt% composite exhibited superior physicochemical properties, including a high surface area (151.59 m²g⁻¹), a narrowed optical bandgap (2.39 eV), and significantly enhanced charge separation. This optimized 8 % Ag₂O/MoO₃/SiO₂ nanocomposite demonstrated exceptional photocatalytic activity, achieving the complete reduction of aqueous mercury(II) ions within 30 min under visible-light irradiation at a 2.0 g L⁻¹ dosage. The material delivered a rapid photoreaction rate of 60.43 μM min⁻¹ and maintained outstanding stability, keeping 95 % of its efficiency after five operational cycles. These results highlight the efficacy of this Ag₂O-sensitized MoO₃/SiO₂ heterostructure as a robust and highly efficient photocatalyst for water purification.

开发用于重金属污染修复的可持续光催化剂仍然是一个关键的环境目标。在此，我们报告了一种简单的溶胶-凝胶合成氧化银（Ag2O）纳米颗粒浸渍在二氧化硅负载的三氧化钼（MoO3/SiO2）纳米片上。系统优化Ag2O负载表明，8 wt%的复合材料具有优异的物理化学性能，包括高表面积（151.59 m2 - 1）、窄光学带隙（2.39 eV）和显著增强的电荷分离。该优化的8% Ag2O/MoO3/SiO2纳米复合材料表现出优异的光催化活性，在2.0 g L−1的可见光照射下，在30分钟内实现水相汞离子的完全还原。该材料的光化学反应速率为60.43 μM min−1，具有优异的稳定性，在5个操作循环后仍能保持95%的效率。这些结果强调了这种ag20敏化MoO3/SiO2异质结构作为一种强大而高效的水净化光催化剂的功效。

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