Materials Research Bulletin最新文献

Binder-free NiCoCu/graphene aerogel electrodes for supercapacitors 超级电容器用无粘结剂NiCoCu/石墨烯气凝胶电极

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-06-01 Epub Date: 2026-02-01 DOI: 10.1016/j.materresbull.2026.114038

Hanyu Yang , Chang Yang , Zhiteng Wang , Chenning Sun , Huidong Xie

Herein, we integrate the advantages of carbon and pseudocapacitive materials by employing a three-dimensional graphene oxide hydrogel network as a template to in situ adsorb the metal ions. Using a template-assisted hydrothermal process, we constructed a self-supporting ternary nickel-cobalt-copper basic carbonate/graphene aerogel (NiCoCu/GA) composite. Results reveal that NiCoCu/GA exhibits a high areal capacitance of 3448.8 mF·cm⁻² at 1 mA·cm⁻² and retains 93.33% of its capacitance after 15,000 charge-discharge cycles. The unique 3D conductive graphene frameworks offer abundant Faradaic reaction sites while ensuring efficient electron transport and structural stability. When assembling NiCoCu/GA and activated carbon into an asymmetric supercapacitor device, it achieves an energy density of 813.9 µWh·cm⁻² at a power density of 49.74 µW·cm⁻² and retains 86.96% of its capacity after 10,000 cycles. This work presents an effective strategy for overcoming the long-standing challenge of balancing high capacitance and long cycle life in supercapacitors.

在这里，我们通过采用三维氧化石墨烯水凝胶网络作为模板来原位吸附金属离子，从而整合了碳和假电容材料的优点。采用模板辅助水热工艺，构建了一种自支撑型三元镍钴铜碱碳酸酯/石墨烯气凝胶（NiCoCu/GA）复合材料。结果表明，NiCoCu/GA在1 mA·cm - 2条件下具有3448.8 mF·cm - 2的高面电容，在15000次充放电循环后仍能保持93.33%的电容。独特的3D导电石墨烯框架提供了丰富的法拉第反应位点，同时确保了有效的电子传递和结构稳定性。将NiCoCu/GA与活性炭组装成非对称超级电容器器件，在49.74µW·cm−2的功率密度下，获得了813.9µWh·cm−2的能量密度，并在10,000次循环后保持了86.96%的容量。这项工作提出了一种有效的策略，克服了长期以来超级电容器平衡高电容和长循环寿命的挑战。

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引用次数: 0

Synergistic adsorption and photocatalysis on Ag3PO4/GOQDs/rGH for multi-pollutant wastewater remediation Ag3PO4/GOQDs/rGH协同吸附与光催化修复多污染物废水

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-06-01 Epub Date: 2026-02-05 DOI: 10.1016/j.materresbull.2026.114044

Yi Wang, Yueyue Wang, xiaofeng Wang

This study reports the design of a three-dimensional Ag₃PO₄/GOQDs/rGH composite photocatalyst, in which Ag₃PO₄ is modified with graphene oxide quantum dots (GOQDs) and supported on a reduced graphene oxide hydrogel (rGH). The composite was developed to achieve synergistic enhancement of both photocatalytic activity and stability for the degradation of organic pollutants. The rGH framework provides strong adsorption capacity, enabling rapid enrichment of pollutants near the active sites, while the GOQDs facilitate efficient separation of photogenerated electron-hole pairs and improve the interfacial stability and photocatalytic performance of Ag₃PO₄. Leveraging the synergy between adsorption and photocatalysis, the composite exhibits high degradation efficiency toward phenol, tetracycline, ciprofloxacin, and various dyes, achieving removal rates of 98.1%, 98.7%, 99.3%, and 100% within 24, 21, 15, and 3 min, respectively. Trapping experiments indicate that •O₂^- and h⁺ serve as the primary active species in the degradation process. The Ag₃PO₄/GOQDs/rGH composite demonstrates excellent adsorption and photocatalytic performance, offering an effective strategy for the efficient removal of multiple pollutants via an integrated adsorption-photocatalysis mechanism.

本研究设计了一种三维Ag3PO4/GOQDs/rGH复合光催化剂，其中Ag3PO4用氧化石墨烯量子点（GOQDs）修饰，并负载在还原氧化石墨烯水凝胶（rGH）上。该复合材料的开发是为了实现光催化活性和稳定性的协同增强，以降解有机污染物。rGH框架具有较强的吸附能力，可使活性位点附近的污染物快速富集，而GOQDs可促进光生电子空穴对的有效分离，提高Ag3PO4的界面稳定性和光催化性能。利用吸附和光催化的协同作用，该复合材料对苯酚、四环素、环丙沙星和各种染料具有较高的降解效率，在24、21、15和3 min内分别达到98.1%、98.7%、99.3%和100%的去除率。捕获实验表明，•O2-和h+是降解过程中的主要活性物质。Ag3PO4/GOQDs/rGH复合材料具有优异的吸附和光催化性能，通过吸附-光催化一体化机制为高效去除多种污染物提供了有效策略。

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引用次数: 0

Thermally controlled Er3+-Ho3+ energy transfer in NaYGeO4 olivine phosphor for enhanced NIR-II luminescence and sensitive thermometry 热控制Er3+-Ho3+在NaYGeO4橄榄石荧光粉中的能量转移，增强NIR-II发光和灵敏测温

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-06-01 Epub Date: 2026-01-28 DOI: 10.1016/j.materresbull.2026.114033

Hui Zeng , Xiaolang Fan , Yangbo Wang , Huaiyong Li

Lanthanide NIR-II luminescence free from thermal quenching is attractive for various applications at elevated temperatures. Here, we present a thermal enhancement of Er³⁺ NIR-II luminescence based on the synergy of phonon assisted Er³⁺-Er³⁺ cross relaxations and controllable Er³⁺-Ho³⁺ energy transfer. The lattice expansion of NaYGeO₄ olivine phosphor upon heating (298–823 K) suppresses the Er³⁺-Ho³⁺ energy transfer and leads up to 46.1 times enhancement of Er³⁺ NIR-II luminescence under 379 nm excitation. The NIR-II luminescence evolution as increasing temperature allows dual-mode ratiometric thermometry, i.e., luminescence intensity ratios (LIRs) based on Er^{3+ 4}I_13/2 Stark sublevels and on Er^{3+ 4}I_13/2 and Ho^{3+ 5}I₆ levels. Obtained relative sensitivities above 0.46% K^‒1 over a broad temperature range of 298–673 K with a maximum of 2.32% K^-1 suggest NaYGeO₄:Er³⁺/Ho³⁺ phosphor as a promising NIR-II luminescence thermometer. Moreover, this research offers an available perspective for designing thermal-enhanced NIR luminescence in ordinary thermal expansion materials.

无热猝灭的镧系NIR-II发光对高温下的各种应用具有吸引力。在这里，我们提出了基于声子辅助Er3+-Er3+交叉弛豫和可控Er3+-Ho3+能量转移协同作用的Er3+ NIR-II发光的热增强。在加热（298 ~ 823 K）时，NaYGeO4橄榄石荧光粉的晶格膨胀抑制了Er3+-Ho3+的能量转移，导致Er3+ NIR-II在379 nm激发下的发光增强了46.1倍。NIR-II发光随温度升高的演变允许双模比例测温，即基于Er3+ 4I13/2 Stark亚能级和Er3+ 4I13/2和Ho3+ 5I6能级的发光强度比（lir）。在298 ~ 673 K的较宽温度范围内获得了0.46% K-1以上的相对灵敏度，最大值为2.32% K-1，表明NaYGeO4:Er3+/Ho3+荧光粉是一种很有前途的NIR-II发光温度计。此外，本研究为设计普通热膨胀材料的热增强近红外发光提供了一个可行的前景。

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引用次数: 0

White light emission regulation of Eu2+/Bi3+/Sm3+ Co-doped Ca4MgAl2Si3O14 phosphors under near-ultraviolet excitation 近紫外激发下Eu2+/Bi3+/Sm3+共掺杂Ca4MgAl2Si3O14荧光粉的白光发射调控

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-06-01 Epub Date: 2026-02-02 DOI: 10.1016/j.materresbull.2026.114036

Daoyi Wu , Mengmeng Shang

For the attainment of healthy and comfortable full-spectrum lighting, it is of great importance to develop white phosphors that can be excited by near-ultraviolet (n-UV) light. Herein, we report a single-matrix white-emitting phosphor, Ca₄MgAl₂Si₃O₁₄: Eu²⁺, Bi³⁺, Sm³⁺ (CMAS: Eu²⁺, Bi³⁺, Sm³⁺). When excited by 300 nm light, the CMAS: Eu²⁺ phosphor emits yellow-green light peaking at 530 nm, while the CMAS: Bi³⁺ phosphor produces blue emission centered at 400 nm. Through energy transfer between Bi³⁺ and Sm³⁺, dual emission bands at blue and red regions are achieved, which complements the emission spectrum of Eu²⁺ and makes it possible for a single CMAS matrix to emit white light. The photoluminescence intensity and thermal stability of CMAS: Eu²⁺ at 423 K are improved via Na⁺ substitution for Ca²⁺ due to the reduction of Eu³⁺ to Eu²⁺ and the elevated activation energy barrier inhibit thermal quenching at elevated temperatures. The white LED lamp, fabricated with a 300 nm LED chip and synthesized CMAS: Eu²⁺, Na⁺, Bi³⁺, Sm³⁺ phosphor, demonstrates good color quality. This indicates its promising potential for applications in healthy solid-state lighting.

为了实现健康舒适的全光谱照明，开发可被近紫外光激发的白色荧光粉具有重要意义。本文报道了一种单基体发光荧光粉Ca4MgAl2Si3O14: Eu2+， Bi3+, Sm3+ (CMAS: Eu2+, Bi3+, Sm3+)。当受300 nm光激发时，CMAS: Eu 2 +荧光粉在530 nm处发出黄绿色的光，而CMAS: Bi 3 +荧光粉在400 nm处发出蓝色的光。通过Bi3+和Sm³⁺之间的能量转移，实现了蓝区和红区双发射带，补充了Eu 2⁺的发射光谱，使单个CMAS矩阵发出白光成为可能。CMAS: Eu 2 +在423 K时的光致发光强度和热稳定性通过Na +取代Ca 2 +得到了改善，这是由于Eu³+还原为Eu 2 +，并且升高的活化能垒抑制了高温下的热猝灭。用300nm LED芯片制作的白色LED灯，合成了CMAS: Eu 2 +、Na +、Bi³+、Sm³+荧光粉，显示出良好的色彩质量。这表明它在健康固态照明方面的应用潜力很大。

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引用次数: 0

Epitaxially grown core–shell NaGdF4:Tm,Yb@NaGdF4:Ce,Tb nanoparticles exhibiting down- and up-conversion luminescence with multifunctional properties 外延生长的核壳纳米粒子NaGdF4:Tm，Yb@NaGdF4:Ce，Tb具有向下和上转换发光的多功能特性

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-06-01 Epub Date: 2026-01-31 DOI: 10.1016/j.materresbull.2026.114037

Rashmi Joshi , Manas Srivastava , Ruchi Agrawal , Bheeshma Pratap Singh , Raghumani Singh Ningthoujam

Core@shell nanoparticles, NaGdF₄:Tm–Yb@NaGdF₄:Ce–Tb, were synthesized via a thermolysis method, enabling epitaxial shell growth over the core as a single entity. These nanoparticles exhibit both upconversion and downshifting luminescence. Under 980 nm excitation, emissions from 474 and 800 nm corresponding to Tm³⁺ ions show significantly enhanced intensity in core@shell structures compared to core only nanoparticles, particularly at higher laser powers. This enhancement arises from reduced dipole–dipole interactions among Tm³⁺ ions due to dilution and suppression of surface defects and quenchers. In the down-conversion process, Tm³⁺ emission is quenched under UV excitation (258, 273, and 361 nm), whereas strong Tb³⁺ emission is observed due to efficient energy transfer from Ce³⁺/Gd³⁺ to Tb³⁺ ions. The dual-mode excitation and emission tunability make these nanoparticles promising candidates for security ink applications. Additionally, folic acid–functionalized nanoparticles demonstrate potential for targeted cancer therapy.

Core@shell纳米粒子，NaGdF4:Tm - Yb@NaGdF4: Ce-Tb，通过热分解方法合成，使外延壳在核心上作为一个单一实体生长。这些纳米粒子具有上转换和下移两种发光特性。在980 nm激发下，Tm +离子对应的474和800 nm的辐射在core@shell结构中的强度比纯核心纳米颗粒明显增强，特别是在更高的激光功率下。这种增强是由于Tm +离子之间的偶极子-偶极子相互作用的减少，这是由于表面缺陷和淬灭剂的稀释和抑制。在下转换过程中，Tm +在紫外线激发下（258、273和361 nm）被猝灭，而Tb +由于Ce + /Gd +向Tb +离子的高效能量转移而具有强发射。双模激发和发射可调性使这些纳米粒子成为安全油墨应用的有希望的候选者。此外，叶酸功能化纳米颗粒显示出靶向癌症治疗的潜力。

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引用次数: 0

B-site engineered bilayered Ruddlesden-Popper ferrites for efficient oxygen evolution and overall water electrolysis b点工程双层Ruddlesden-Popper铁氧体，用于高效的析氧和整体水电解

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-06-01 Epub Date: 2026-02-02 DOI: 10.1016/j.materresbull.2026.114040

Zhi Zhang , Zhenyu Lei , Zhenkang Sun , Mengfei Zhang , Yu Zhang , Qi Yang , Xinru Ma , Shengnan Chen , Jia Li , Minkai Qin , Yunyi Cao , Jianguo Liu

Developing durable oxygen evolution reaction (OER) electrocatalysts is pivotal for hydrogen production but hindered by sluggish kinetics. While Ruddlesden-Popper (RP) oxides offer a versatile platform, they often suffer from limited active site density. Herein, we present a targeted B-site engineering strategy to activate bilayer RP ferrites (La_0.25Sr_2.75Fe₂O₇) via systematic Ni incorporation. This substitution strengthens B-O covalency and enriches oxygen vacancies. The optimized LSFN50 exhibits a low overpotential of 344 mV at 10 mA cm^-2, surpassing commercial IrO₂. Mechanistic studies indicate a pH-dependent pathway. Systematic structural and chemical analyses reveal that high-valence Ni³⁺ and Fe-Ni synergy drive surface reconstruction into active oxyhydroxides, with lattice oxygen participation further boosting reaction kinetics. Significantly, an anion exchange membrane (AEM) water electrolyzer employing the LSFN50 anode delivers an industrial-grade current density of 2.23 A cm^-2 at 1.9 V. This study highlights the critical role of B-site modulation in designing high-performance catalysts for practical energy conversion.

开发耐用的析氧反应（OER）电催化剂对制氢至关重要，但由于动力学缓慢而受到阻碍。虽然Ruddlesden-Popper （RP）氧化物提供了一个通用平台，但它们的活性位点密度有限。本文提出了一种有针对性的b位点工程策略，通过系统的Ni掺入来激活双层RP铁氧体（La0.25Sr2.75Fe2O7）。这种取代强化了B-O共价并丰富了氧空位。优化后的LSFN50在10 mA cm-2下的过电位为344 mV，超过了商用IrO2。机制研究表明ph依赖性途径。系统的结构和化学分析表明，高价Ni3+和Fe-Ni协同作用驱动表面重构成活性氢氧化物，晶格氧参与进一步促进了反应动力学。值得注意的是，采用LSFN50阳极的阴离子交换膜（AEM）水电解器在1.9 V下可提供2.23 A cm-2的工业级电流密度。该研究强调了b位调制在设计用于实际能量转换的高性能催化剂中的关键作用。

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引用次数: 0

A comparative analysis of the dielectric, thermal and mechanical characteristics of butyl rubber composites with low dielectric fillers for flexible microwave substrate applications 低介电填料丁基橡胶复合材料在柔性微波衬底中的介电、热、力学特性对比分析

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-06-01 Epub Date: 2026-01-30 DOI: 10.1016/j.materresbull.2026.114034

Muhammed Azeem Vadakkathintakath , Abhijith Sivan , Shameer Keelaillam , Anju Pradeep , Murali K P

This study examines the device-level performance of elastomer-based microwave substrates embedded with low-dielectric ceramic fillers. It assesses whether fillers in the substrate composite can be replaced to achieve similar performance across a wide frequency range. Butyl rubber composites with alumina and fused silica fillers were prepared and characterised using XRD, SEM, FTIR, Raman spectroscopy, DSC, TGA, and DTA. Thermal conductivity, coefficient of thermal expansion, tensile strength, and hardness tests were performed. Dielectric parameters were obtained via the probe method using a Vector Network Analyser (VNA). The findings indicate that thermal and mechanical characteristics are mostly similar, with slight variations in dielectric behaviour observed across the GHz frequency spectrum. The practical applicability of these composites was demonstrated by designing and testing triband antennas operating at 2.6, 3.6, and 4.5 GHz on both single- and multilayer substrate configurations, confirming their suitability and comparable performance for flexible, application-specific microwave systems.

本研究考察了嵌入低介电陶瓷填料的弹性体基微波衬底的器件级性能。它评估衬底复合材料中的填料是否可以被替换以在宽频率范围内实现类似的性能。采用XRD、SEM、FTIR、拉曼光谱、DSC、TGA、DTA等方法对以氧化铝和熔融二氧化硅为填料的丁基橡胶复合材料进行表征。进行了导热系数、热膨胀系数、抗拉强度和硬度测试。利用矢量网络分析仪（VNA）通过探针法获得介电参数。研究结果表明，热学和力学特性基本相似，在GHz频谱上观察到介电行为略有变化。通过设计和测试工作在2.6、3.6和4.5 GHz的三频天线，以及单层和多层基板配置，证明了这些复合材料的实际适用性，并证实了它们在灵活、特定应用的微波系统中的适用性和相当性能。

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引用次数: 0

Evaluation of the optical properties and radiation shielding effectiveness of Ho2O3-doped borate glasses 掺ho2o3硼酸盐玻璃光学性能及辐射屏蔽效果评价

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-06-01 Epub Date: 2026-02-03 DOI: 10.1016/j.materresbull.2026.114035

Chaitali V. More , P.G. Ghuge , Farha Naaz , S.J. Rathod , S.S. Darade , Pravina P. Pawar , Shrikant Biradar , U. Rilwan , M.I. Sayyed

Holmium Oxide (Ho₂O₃) containing borate glasses are generating significant interest due to their adaptable characteristics and potential applications in numerous technological fields. This study examines how Ho₂O₃ doping affects the synthesized glasses' optical and radiation shielding capabilities. The melt-quench method was used to make the glasses. Gamma attenuation properties, including the mass attenuation coefficient (MAC), half-value layer (HVL), effective atomic number (Z_eff), and linear attenuation coefficient (LAC), were examined across an energy range of 356–1330 keV. Higher Ho₂O₃ concentrations improved the density, which further contributed to enhanced mass attenuation coefficients (MACs) from 0.2746 to 0.3667 g/cm² at 122 keV. The experimental MAC values computed using NaI (Tl) scintillation detector and some radioactive sources, including Na-22, Ba-133, Co-60, and Cs-137 are validated using the Phy-X software results. Results of the present work indicate that adding BaO, ZnO, and Ho₂O₃ improves the band gap. These glasses are appropriate for applications needing specialized optical and radiation shielding qualities due to their optical modifications.

含硼酸盐的氧化钬（Ho2O3）玻璃由于其适应性和在许多技术领域的潜在应用而引起了人们的极大兴趣。本研究考察了Ho2O3掺杂如何影响合成玻璃的光学和辐射屏蔽能力。玻璃的制作采用了熔融淬火法。伽马衰减特性，包括质量衰减系数（MAC）、半值层（HVL）、有效原子序数（Zeff）和线性衰减系数（LAC），在356-1330 keV的能量范围内进行了测试。较高的Ho2O3浓度提高了密度，进一步提高了质量衰减系数（MACs），在122 keV下从0.2746 g/cm2增加到0.3667 g/cm2。利用物理- x软件对NaI （Tl）闪烁探测器和Na-22、Ba-133、Co-60、Cs-137等放射源计算的实验MAC值进行了验证。结果表明，加入BaO、ZnO和Ho2O3可以改善带隙。由于其光学修饰，这些眼镜适用于需要特殊光学和辐射屏蔽质量的应用。

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引用次数: 0

Recycling coal gangue into advanced CO₂ sorbents: metal-doped Li₄SiO₄ for enhanced capture efficiency 将煤矸石回收为高级CO₂吸附剂：掺杂金属的Li₄SiO₄，提高捕集效率

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-06-01 Epub Date: 2026-02-10 DOI: 10.1016/j.materresbull.2026.114059

Yuan Gao , Ruoling Sun , Yuming Guo , Rongli Jiang , Deshun Kong , Zhongran Dai , Vitaly Gitis , Baiyi Li , Peng Huang , Meng Li , Jixiong Zhang

Coal-gangue backfilling offers potential for mineral-based CO₂ sequestration, as gangue can react with injected CO₂ to form stable carbonates. A stable CO₂ supply requires efficient capture technologies, for which lithium orthosilicate (Li₄SiO₄) is a promising high-temperature sorbent. Its broader use is limited by the cost of conventional silica, so in this study, amorphous SiO₂ from coal gangue was used as a sustainable precursor for solid-state synthesis of Li₄SiO₄. Targeted K⁺ and Nd³⁺ doping were employed to improve performance. K⁺ doping promotes LiKCO₃ formation and accelerates surface reactions, achieving high initial CO₂ uptake (36.15 wt%) but lower cyclic stability. In contrast, Nd³⁺ doping preserves the Li₄SiO₄ phase, enhances internal diffusion, and maintains stable uptake (34–36 wt%) over 20 cycles, with LiNd-0.10 showing the best multi-cycle performance. This approach provides a cost-effective, environmentally friendly route to high-performance CO₂ sorbents from waste silica, combining carbon capture and solid waste valorization.

煤矸石充填为矿物基CO 2封存提供了潜力，因为煤矸石可以与注入的CO 2发生反应，形成稳定的碳酸盐。稳定的CO₂供应需要高效的捕集技术，其中正硅酸锂（Li₄SiO₄）是一种很有前途的高温吸附剂。它的广泛应用受到传统二氧化硅成本的限制，因此在本研究中，以煤矸石中的无定形SiO₂作为固态合成Li₄SiO₄的可持续前体。采用靶向K +和Nd +掺杂来提高性能。K +掺杂促进了LiKCO₃的形成，加速了表面反应，实现了高的初始CO₂吸收率（36.15 wt%），但较低的循环稳定性。Nd³+掺杂保留了Li₄SiO₄相，增强了内部扩散，在20个循环中保持稳定的吸收（34-36 wt%），其中LiNd-0.10表现出最好的多循环性能。这种方法结合了碳捕获和固体废物增值，为从废二氧化硅中提取高性能CO 2吸附剂提供了一种经济高效、环保的途径。

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引用次数: 0

Advanced hydrogen peroxide sensor based on modified platinum nanoparticles through square wave voltammetry 基于修饰铂纳米粒子的先进过氧化氢传感器方波伏安法

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-06-01 Epub Date: 2026-01-29 DOI: 10.1016/j.materresbull.2026.114031

Weilong Bao , Hang Lu , Fei Li , Siyuan Lu

Morphological and size control of Pt nanoparticles (PtNPs) has long been pursued to improve the catalytic performance of Pt-based electrochemical sensors during recent decades. In this study, a high‑performance hydrogen peroxide sensor was developed by electrochemically depositing PtNPs onto a polyaniline‑modified glassy carbon electrode (PANI/GCE). Subsequently, the PtNPs/PANI/GCE electrode was separately subjected to two distinct methods, namely square wave (SW) treatment and square wave voltammetry (SWV). It was found that SWV was able to alter the exposed surface of platinum nanoparticles from (111) to (200), which leads to the formation of the angular nano-edges on the original Pt nanospheres. This structural transformation effectively increased the number of active sites and enlarged the effective surface area for the catalytic redox reaction of hydrogen peroxide. Owing to such advantages, the prepared PtNPs/PANI/GCE-SWV electrode exhibits a wide linear range from 50 μM to 30 mM and an excellent sensitivity of 294.90 μA·mM⁻¹·cm⁻² for H₂O₂ detection. In addition, SWV endowed the fabricated sensor with superior stability and reproducibility, thereby demonstrating promising prospects in the commercialization of stretchable and wearable biosensors.

近几十年来，人们一直在追求Pt纳米颗粒的形态和尺寸控制，以提高基于Pt的电化学传感器的催化性能。在这项研究中，通过电化学沉积PtNPs到聚苯胺修饰的玻碳电极（PANI/GCE）上，开发了一种高性能过氧化氢传感器。随后，对PtNPs/PANI/GCE电极分别进行方波（SW）处理和方波伏安法（SWV）处理。研究发现，SWV可以使铂纳米球的暴露表面由（111）改变为（200），从而在原铂纳米球上形成棱角状的纳米边缘。这种结构转变有效地增加了活性位点的数量，扩大了过氧化氢催化氧化还原反应的有效表面积。由于这些优点，制备的PtNPs/PANI/GCE-SWV电极具有50 μM ~ 30 mM的宽线性范围，检测H2O2的灵敏度为294.90 μA·mM−1·cm−2。此外，SWV使所制备的传感器具有优越的稳定性和可重复性，因此在可拉伸和可穿戴生物传感器的商业化方面具有广阔的前景。

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引用次数: 0