Solid State Sciences最新文献_第5页

Synthesis and enhancing the microstructure, optical and dielectric features of PS-PEG-SiC-ZrO2 for optoelectronics and high energy storage applications PS-PEG-SiC-ZrO2光电子和高能量存储材料的合成及微结构、光学和介电特性的增强

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2025-12-09 DOI: 10.1016/j.solidstatesciences.2025.108169

Ahmed Hashim , Hiba Salman Abdulsalam , M.H. Abbas , Ali Salim Jawad , Aseel Hadi

This research aims to develop nanocomposite films with novel optical and electronic properties at a low cost, using polystyrene (PS) and polyethylene glycol (PEG) as a host matrix doped with silicon carbide and zirconium oxide plasmonic nanoparticles at various ratios (0, 0.9 %, 1.8 %, and 2.7 %) by a casting method. The structural, dielectric, and optical properties of these films were studied. Optical microscope images revealed a continuous and homogeneous distribution of zirconium oxide particles within the polymer network. FTIR spectra also indicated the presence of physical bonding between the polymer and the nanoparticles. With increasing zirconium oxide particle concentration, both the dielectric constant and dielectric loss of the composites increased, but they decreased with increasing frequency. The electrical conductivity of the PS-PEG/SiC-ZrO₂ nanocomposites to alternating current flow also increased with increasing particle concentration, ranging from about (1.0 × 10⁻¹¹ – 2.0 × 10⁻¹¹) S/cm at 100 Hz, and increased further with increasing frequency. Optical investigations showed an increase in absorbance with increasing particle concentration. Meanwhile, the optical bandgap for the allowed and forbidden indirect transitions of the nanocomposites decreased from 4.05 to 3.5 eV and from 3.8 to 2.9 eV, respectively. In addition, the absorption, extinction, refractive indexes, real and imaginary dielectric constants, and photoconductivity increased with increasing concentration of zirconium oxide particles. These results provide important indications that PS-PEG/SiC-ZrO₂ nanocomposites represent a promising option for applications in photonics and flexible nanoelectronics devices.

本研究旨在以聚苯乙烯（PS）和聚乙二醇（PEG）为基体，以不同比例（0、0.9%、1.8%和2.7%）掺杂碳化硅和氧化锆等离子体纳米粒子，通过铸造方法开发具有新型光学和电子性能的低成本纳米复合薄膜。研究了这些薄膜的结构、介电性能和光学性能。光学显微镜图像显示，氧化锆颗粒在聚合物网络内连续均匀分布。FTIR光谱还表明聚合物与纳米颗粒之间存在物理键合。随着氧化锆颗粒浓度的增加，复合材料的介电常数和介电损耗均增大，但随频率的增加而减小。PS-PEG/SiC-ZrO2纳米复合材料对交流电流的电导率也随着颗粒浓度的增加而增加，在100 Hz下的电导率范围为（1.0 × 10−11 ~ 2.0 × 10−11）S/cm左右，并随着频率的增加而进一步提高。光学研究表明，吸光度随粒子浓度的增加而增加。同时，纳米复合材料允许和禁止间接跃迁的光学带隙分别从4.05 eV和3.8 eV减小到3.5 eV和2.9 eV。吸收、消光、折射率、实介电常数和光电导率随氧化锆浓度的增加而增加。这些结果为PS-PEG/SiC-ZrO2纳米复合材料在光子学和柔性纳米电子器件中的应用提供了重要的指示。

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引用次数: 0

Synergistic pore modulation and surface engineering of NaY molecular sieves by N-CQDs for high-efficiency CO2 adsorption N-CQDs对NaY分子筛的协同孔调制和表面工程，用于高效CO2吸附

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2025-12-05 DOI: 10.1016/j.solidstatesciences.2025.108175

Kuihu Zhang , Xiaoyu Duan , Aiying Chen , Yong Liu , Yunxiu Chao

The increasing negative impacts of climate change are primarily attributed to the rising atmospheric CO₂ concentration, which promotes to seek for efficient CO₂ capture technologies. In this work, enhancing CO₂ capture in NaY molecular sieves via nitrogen-doped carbon quantum dots (N-CQDs) is realized by modulating the pore structure and introducing alkali active sites on the surface. The pore structure characteristics and CO₂ adsorption performance of the N-CQDs doped NaY molecular sieves are systematically investigated. The specific surface area of the 2.0 % N-CQDs doped NaY molecular sieve reaches 581 m² g⁻¹, higher than 540 m² g⁻¹ of the primitive NaY molecular sieve. The pore volume and pore size of the 2.0 % N-CQDs doped NaY molecular sieve are 0.26 cm³ g⁻¹ and 3.15 nm, respectively, indicating that the doping of N-CQDs modifies the pore structure. XPS analysis confirms that lots of alkaline sites (−NH) are introduced on the surfaces of NaY molecular sieve. As a result, the CO₂ adsorption capacity is improved from 0.99 mmol g⁻¹ of the blank sample to 1.35 mmol g⁻¹ of the 2.0 % N-CQDs doped NaY molecular sieve due to the synergistic effect of pore structure modulation with surface alkaline sites.

气候变化的负面影响越来越大，主要归因于大气CO2浓度的上升，这促使人们寻求高效的CO2捕集技术。在本研究中，通过调节氮掺杂碳量子点（N-CQDs）的孔隙结构和在表面引入碱活性位点，实现了氮掺杂碳量子点（N-CQDs）在NaY分子筛中增强CO2捕获。系统地研究了N-CQDs掺杂NaY分子筛的孔结构特征和CO2吸附性能。2.0% N-CQDs掺杂的NaY分子筛比表面积达到581 m2 g−1，高于原始NaY分子筛的540 m2 g−1。2.0% N-CQDs掺杂的NaY分子筛孔体积和孔径分别为0.26 cm3 g−1和3.15 nm，表明N-CQDs的掺杂改变了分子筛的孔结构。XPS分析证实，NaY分子筛表面引入了大量碱性位点（−NH）。结果表明，由于孔结构调制与表面碱性位点的协同作用，纳米NaY分子筛的CO2吸附量从空白样品的0.99 mmol g−1提高到2.0 % N-CQDs掺杂的1.35 mmol g−1。

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引用次数: 0

Competing influence of Cd doping on thermoelectric properties of Sb2Te3 alloys between carrier generation and phonon scattering 载流子生成与声子散射对Sb2Te3合金热电性能的竞争影响

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2025-12-05 DOI: 10.1016/j.solidstatesciences.2025.108177

Seungwoo Ha , Yunjae Kim , Guan Hyeong Lee , Se Yun Kim , Sang-il Kim , Myoung Seok Kwon

Sb₂Te₃-based alloys are known for their promising thermoelectric transport properties in the mid-temperature range above 550 K. In this study, we systematically investigated the effects of Cd doping on Sb₂Te₃ by synthesizing Cd_xSb_2-xTe₃ alloys with doping levels up to x = 0.04. Substitution of Cd²⁺ at Sb³⁺ lattice sites introduced additional holes, leading to a marked increase in carrier concentration and, consequently, electrical conductivity. However, this increase was accompanied by a reduction in the Seebeck coefficient, resulting in a significant decrease in the power factor from 3.7 mW/mK² to 1.0 mW/mK² for x = 0.04 with increasing Cd content x. Nevertheless, the lattice thermal conductivity was substantially reduced upon Cd doping, primarily due to enhanced phonon scattering arising from the size and mass difference between Cd²⁺ and Sb³⁺ from 1.4 W/mK to 0.41 W/mK (x = 0.04). Despite the lowered lattice contribution, the total thermal conductivity increased from 3.0 W/mK to 3.8 W/mK with doping of x = 0.04, driven by the large increase of electrical conductivity to 4900 S/cm. As a result, the thermoelectric figure of merit (zT) was decreased by Cd doping due to decrease in power factor and increase of total thermal conductivity. According to Boltzmann transport calculations based on the single parabolic band model, it was revealed that the increase carrier concentration was responsible for the lower power factor and higher total thermal conductivity, which resulted in the lower zT.

sb2te3基合金以其在550 K以上的中温范围内具有良好的热电输运性能而闻名。在本研究中，我们通过合成掺杂量高达x = 0.04的CdxSb2-xTe3合金，系统地研究了Cd掺杂对Sb2Te3的影响。Cd2+在Sb3+晶格位置的取代引入了额外的空穴，导致载流子浓度的显著增加，从而提高了导电性。然而，这种增加伴随着塞贝克系数的降低，导致功率因数从3.7 mW/mK2显著下降到1.0 mW/mK2 (x = 0.04)，随着Cd含量的增加。然而，镉掺杂后晶格热导率大幅降低，主要是由于Cd2+和Sb3+之间的尺寸和质量差从1.4 W/mK增加到0.41 W/mK （x = 0.04）。尽管晶格贡献降低，但当掺杂x = 0.04时，总导热系数从3.0 W/mK增加到3.8 W/mK，这是由于电导率大幅增加到4900 S/cm。结果表明，镉的掺入降低了材料的功率因数，增加了材料的总导热系数，降低了材料的热电优值。基于单抛物带模型的玻尔兹曼输运计算表明，载流子浓度的增加导致了较低的功率因数和较高的总导热系数，从而导致了较低的zT。

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引用次数: 0

First-principles investigation of Rb2InRhX6 (X = F, Cl, Br) double perovskites for monolithic tandem solar Cells: Insights from DFT and SCAPS-1D simulations 单片串联太阳能电池用Rb2InRhX6 （X = F, Cl, Br）双钙钛矿的第一性原理研究：来自DFT和SCAPS-1D模拟的见解

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2025-12-03 DOI: 10.1016/j.solidstatesciences.2025.108167

Kamal Assiouan , Abir Bouchrit , Mohamed Hassoun , Hanan Ziani , Jamal EL. Khamkhami , Abdelfattah Achahbar

Double perovskites have emerged as promising materials for addressing key challenges in photovoltaic solar energy, including high device costs, limited long-term stability, and material toxicity. In this study, we provide a comprehensive analysis of the stability and optoelectronic properties of Rb₂InRhX₆ (X = F, Cl, Br), highlighting its potential as a candidate for photovoltaic applications. Density functional theory (DFT) calculations using the hybrid HSE06 functional reveal that this material exhibits a band gap of 1.35 eV for Rb₂InRhBr₆, 1.80 eV for Rb₂InRhCl₆, and 3.24 eV for Rb₂InRhF₆. Furthermore, the material demonstrates favourable optical properties, such as a high absorption coefficient exceeding 10⁵ cm⁻¹. The results indicate that Rb2InRhX6 is a promising candidate for use as a photovoltaic material, particularly as an absorber in the top cell of tandem solar cells. The purpose of this study is to develop a two-junction tandem solar cell by integrating Rb₂InRhCl₆ as the absorber layer in the top cell and ACIGS as the bottom cell absorber. The bottom cell is illuminated using a filtered spectrum that has been pre-calibrated using experimental values from the literature, in order to ensure current matching an essential requirement for tandem cell operation.

This criterion is achieved with an Rb₂InRhCl₆ layer thickness of 1.08 μm, resulting in remarkable performance: a fill factor (FF) of 83.58 %, a power conversion efficiency (PCE) of 26.66 %, a short-circuit current density (J_sc) of 19.57 mA/cm², and an open-circuit voltage (V_oc) of 1.63 V. These findings highlight the potential of lead-free, Rb-based double perovskites for next-generation high-efficiency tandem solar cells.

双钙钛矿已经成为解决光伏太阳能关键挑战的有前途的材料，包括高设备成本，有限的长期稳定性和材料毒性。在这项研究中，我们全面分析了Rb2InRhX6 （X = F, Cl, Br）的稳定性和光电性能，强调了它作为光伏应用的候选材料的潜力。利用杂化HSE06泛函的密度泛函理论（DFT）计算表明，Rb2InRhBr6的带隙为1.35 eV， Rb2InRhCl6的带隙为1.80 eV， Rb2InRhF6的带隙为3.24 eV。此外，该材料表现出良好的光学特性，如超过105 cm−1的高吸收系数。结果表明，Rb2InRhX6是一种很有前途的光伏材料，特别是作为串联太阳能电池顶部电池的吸收剂。本研究的目的是将Rb2InRhCl6作为顶部电池的吸收层，ACIGS作为底部电池的吸收层，开发一种双结串联太阳能电池。底部电池使用过滤光谱照明，该光谱已使用文献中的实验值进行预校准，以确保电流匹配，这是串联电池操作的基本要求。当Rb2InRhCl6层厚度为1.08 μm时，器件的填充系数（FF）为83.58%，功率转换效率（PCE）为26.66%，短路电流密度（Jsc）为19.57 mA/cm2，开路电压（Voc）为1.63 V。这些发现突出了无铅、铷基双钙钛矿用于下一代高效串联太阳能电池的潜力。

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引用次数: 0

Co2MnZ (Z = Al, Si, Ga, Ge, Sn) Heusler alloys as candidate materials for spintronic and microelectronic applications: Electronic structure, transport, and magnetism Co2MnZ (Z = Al, Si, Ga, Ge, Sn) Heusler合金作为自旋电子和微电子应用的候选材料：电子结构、输运和磁性

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2025-12-03 DOI: 10.1016/j.solidstatesciences.2025.108155

Vyacheslav V. Marchenkov , Alena A. Semiannikova , Evgenii D. Chernov , Alexey V. Lukoyanov , Valentin Yu Irkhin , Yulia A. Perevozchikova , Elena B. Marchenkova

Magnetic and electronic transport properties of Co₂MnZ (Z = Al, Ga, Ge, Si, Sn) Heusler alloys were experimentally investigated. Electrical resistivity, in the temperature range from 4.2 to 300 K, as well as field dependences of the Hall effect and magnetization at T = 4.2 K in magnetic fields of up to 100 kOe and 70 kOe, respectively, were measured. Experimental data are in good agreement with the results of the theoretical DFT calculations of the electronic structure and magnetic moments. In the band structure of Co₂MnSi, half-metallicity is formed with the full spin polarization and the half-metallic gap of about 0.6 eV. In Co₂MnZ (Z = Al, Ge, Sn), it is shifted from the Fermi energy by the hole pockets at point Г, preventing thereby the formation of the half-metallic state. In a peculiar case of Co₂MnGa, the antisite defects are expected to determine structural and electronic properties. For the Co₂MnAl and Co₂MnGa topological semimetals, Weyl topological points are found at the Fermi energy; however, for Z = Si, Ge, Si, these features are located deeper within to the valence band. The results show that Co₂MnGe and Co₂MnSn are usual ferromagnets, Co₂MnAl and Co₂MnGa alloys are topological semimetals that can find application in microelectronics, while Co₂MnSi is a half-metallic ferromagnet that is in high demand in spintronics.

实验研究了Co2MnZ (Z = Al, Ga, Ge, Si, Sn) Heusler合金的磁性和电子输运性质。测量了在4.2 ~ 300 K温度范围内的电阻率，以及在高达100 kOe和70 kOe的磁场中，T = 4.2 K时霍尔效应和磁化强度的场依赖性。实验数据与理论DFT计算的电子结构和磁矩的结果吻合较好。在Co2MnSi的能带结构中，形成半金属丰度，自旋完全极化，半金属间隙约为0.6 eV。在Co2MnZ （Z = Al, Ge, Sn）中，它在Г点被空穴穴从费米能转移，从而阻止了半金属态的形成。在Co2MnGa的特殊情况下，反位缺陷预计将决定结构和电子性能。对于Co2MnAl和Co2MnGa拓扑半金属，在费米能量处存在Weyl拓扑点；然而，对于Z = Si, Ge, Si，这些特征位于更深的价带内。结果表明，Co2MnGe和Co2MnSn是常见的铁磁体，co2mnnal和Co2MnGa合金是拓扑半金属，可以在微电子学中找到应用，而Co2MnSi是半金属铁磁体，在自旋电子学中有很高的需求。

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引用次数: 0

Constructing tightly integrated CTF-2/TiO2 S-scheme heterojunction with enhanced charge separation for photocatalytic hydrogen evolution 构建紧密集成的CTF-2/TiO2 S-scheme异质结，增强电荷分离，用于光催化析氢

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2025-12-03 DOI: 10.1016/j.solidstatesciences.2025.108168

Wenyue Zhao , Zipeng Jin , Kunting Li , Huimin Feng , Lei Xu , Yiming Zhang

Efficiently harnessing solar energy for hydrogen production remains a significant challenge, primarily dependent on the rational design of photocatalysts. In this work, an S-scheme heterojunction was constructed by integrating TiO₂ with a biphenyl-bridged covalent triazine framework (CTF-2). The extended π-conjugation in CTF-2 significantly enhances visible-light absorption and generates abundant delocalized electrons. The heterostructure was confirmed by characterizations, which revealed an increased specific surface area and enhanced redox capacity. Photoelectrochemical tests indicated a significant reduction in charge recombination, attributed to the newly formed Ti-N bonds that promote electron transfer from TiO₂ to CTF-2. The active species capture experiment and band structure analysis corroborated the S-scheme charge transfer route. The optimal 1.0 wt% CTF-2/TiO₂ achieved an H₂ evolution rate of 2.975 mmol g⁻¹ h⁻¹, 4.92 times higher than pristine TiO₂, and retained 83 % of its activity after five cycles. This study provides a practical approach to designing high-performance, stable heterostructures for solar energy conversion.

有效利用太阳能制氢仍然是一个重大挑战，主要依赖于光催化剂的合理设计。在这项工作中，通过将TiO2与联苯桥接的共价三嗪框架（CTF-2）结合，构建了s型异质结。CTF-2的扩展π共轭显著增强了可见光吸收，并产生了丰富的离域电子。异质结构经表征证实，其比表面积增加，氧化还原能力增强。光电化学测试表明，由于新形成的Ti-N键促进了电子从TiO2向CTF-2的转移，电荷重组显著减少。活性物质捕获实验和能带结构分析证实了S-scheme电荷转移途径。优化后的1.0 wt% CTF-2/TiO2的H2析出率为2.975 mmol g−1 h−1，是原始TiO2的4.92倍，5次循环后仍保持83%的活性。该研究为设计高性能、稳定的太阳能转换异质结构提供了一种实用的方法。

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引用次数: 0

Polyhedral variation in the Ho substitution in dodecahedral site of Gd3Fe5O12 garnet and evaluation of the morphological, optical and electric properties Gd3Fe5O12石榴石十二面体位Ho取代的多面体变化及其形态学、光学和电学性质的评价

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2025-12-03 DOI: 10.1016/j.solidstatesciences.2025.108164

Y.E. Parada Cano , I.M. Saavedra Gaona , J.L. Izquierdo , O. Morán , C.A. Parra Vargas , G.I. Supelano

Structural properties obtained from Rietveld refinement of X-ray diffraction data were obtained of the polycrystalline substituted Gadolinium-Iron garnet Gd_3-xHo_xFe₅O₁₂ (x = 0, 0.2, 0.4 and 0.6) system produced by standard solid state reaction method. Morphological features were analyzed by scanning electron microscopy. The band-gap (E_g) values of the samples were estimated by linear extrapolation from the Tauc plots, E_g decreased progressively by increasing the Ho³⁺ concentration. Polarization loops were obtained with different applied fields at room temperature. Nevertheless, the loops turned out to be visually distinct from those of a true ferroelectric material. Hence it was evident that spurious effects (leakage currents) influenced the polarization curves that resembled ferroelectric loops. Despite this, the results showed that the values of the remanent polarization and the saturated polarization of the Ho-doped samples resulted to be lower than those of the pristine sample.

采用标准固相反应法制备了多晶取代钆铁石榴石Gd3-xHoxFe5O12 （x = 0,0.2, 0.4和0.6）体系，通过对x射线衍射数据的Rietveld细化得到了体系的结构性质。通过扫描电镜分析其形态特征。采用线性外推法从tac图中估计样品的带隙（Eg）值，随着Ho3+浓度的增加，Eg逐渐减小。在室温下，在不同的外加磁场下得到了极化回路。然而，这些环在视觉上与真正的铁电材料不同。因此，很明显，伪效应（漏电流）影响了类似铁电回路的极化曲线。尽管如此，结果表明，ho掺杂样品的剩余极化和饱和极化值都低于原始样品。

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引用次数: 0

Electroactive hierarchically structured ZnO developed with a sugar-based surfactant 采用糖基表面活性剂制备了电活性层次结构ZnO

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2025-12-03 DOI: 10.1016/j.solidstatesciences.2025.108166

Ekaterina Bulatova, Maria Shumakova, Oleg Bol'shakov

Electrochemical analytical assays are an affordable, easy-to-execute methods with simple sample preparation. Often electrochemical means of analysis employ hierarchically structured materials (HSM) as an electroactive additive. The superiority of such materials over regular-structured ones is manifested in increased functionality resulting from increased surface area, multi-modal porosity, and anisotropy of properties. One of them is zinc oxide - an affordable and safe substrate to build up hierarchical structures with the use of a wide range of methods: sol-gel, hydrothermal, template-based, etc. In our work, we investigated the possibility of forming a hierarchical structure of zinc oxide using a soft, accessible molecular template–a sugar-based surfactant. As a result, we developed conditions for obtaining zinc oxide spheres with a narrow size distribution using a commercially available, cheap and eco-friendly alkyl glycoside. Obtained spheres comprised flat flakes, which are a flat aggregate of oxide nanoparticles, thus exhibiting structural regularity on three scale levels. Wurzite nanocrystal aggregation was assumed to proceed through orthogonal 100 and 002 facets, while the most abundant one (101) was stabilized with the sugar moiety of the soap molecule. Surfactant stabilization of the facet also well explains the minimal contact of the planar flakes, comprising the microspheres. This material proved effective as an electroactive additive for the electrochemical analysis of nimesulide in a wide concentration range (0.5–166 μM) with a satisfactory low detection limit (0.23 μM).

电化学分析分析是一种经济实惠，易于执行的方法，样品制备简单。通常电化学分析手段采用层次结构材料（HSM）作为电活性添加剂。这种材料相对于规则结构的材料的优势表现在由于增加表面积、多模态孔隙率和性能的各向异性而增加的功能上。其中之一是氧化锌，这是一种经济实惠且安全的基底，可以使用多种方法构建分层结构：溶胶-凝胶，水热，基于模板等。在我们的工作中，我们研究了使用一种柔软的、可接近的分子模板——一种糖基表面活性剂——形成氧化锌分层结构的可能性。因此，我们开发了使用市售、廉价和环保的烷基糖苷获得具有窄尺寸分布的氧化锌球的条件。所获得的球体由扁平的薄片组成，这是氧化纳米颗粒的扁平聚集体，因此在三个尺度上表现出结构的规律性。假设纤锌矿纳米晶体通过正交100和002面聚集，而最丰富的一个（101）是由肥皂分子的糖部分稳定的。表面活性剂的稳定也很好地解释了由微球组成的平面薄片的最小接触。结果表明，该材料可作为尼美舒利的电活性添加剂，在较宽的浓度范围（0.5 ~ 166 μM）内进行电化学分析，检出限较低（0.23 μM）。

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引用次数: 0

Preparation of Bi12O15Cl6/Bi2WO6 heterojunction photocatalysts with efficient photocatalytic degradation of Rhodamine B performance 制备具有高效光催化降解罗丹明B性能的Bi12O15Cl6/Bi2WO6异质结光催化剂

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2025-12-02 DOI: 10.1016/j.solidstatesciences.2025.108157

Gang Liu , Hongna Zhu , Lihui Liu , Xiaodong Feng , Libo Wang , Jingyao Li , Ya Wang , Chaoqun Meng , Tianyu Xu , Peng Zhang

This study presents a Bi₁₂O₁₅Cl₆/Bi₂WO₆ (CW) heterojunction photocatalyst prepared by solvothermal method combined with calcination. The structural, surface morphological and spectral properties of samples were analyzed using XRD, SEM, XPS, BET, UV–Vis DRS and PL spectroscopy. The photocatalytic degradation efficiency towards RhB is up to 94.4 % under visible-light irradiation for 60 min. Free radical trapping experiments revealed h⁺ was the key active species for photodegradation. The photoluminescence spectroscopy and the transient photocurrent responses demonstrated that the enhanced photocatalytic activity mainly originates from the separation of photogenerated electron-hole pairs. This study not only provides a photocatalyst-design strategy, but also contributes to the pollutant treatment field.

采用溶剂热法结合煅烧法制备了Bi12O15Cl6/Bi2WO6 （CW）异质结光催化剂。采用XRD、SEM、XPS、BET、UV-Vis DRS和PL光谱分析了样品的结构、表面形貌和光谱性质。在可见光照射60 min的条件下，对RhB的光催化降解效率可达94.4%。自由基捕获实验表明h+是光降解的关键活性物质。光致发光光谱和瞬态光电流响应表明，光催化活性的增强主要来自于光生电子-空穴对的分离。该研究不仅提供了一种光催化剂设计策略，而且对污染物处理领域具有重要意义。

引用次数: 0

Exploring chromium oxynitrides as efficient catalysts for the water-gas shift reaction 探索氮化铬作为水煤气转换反应的有效催化剂

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2025-12-02 DOI: 10.1016/j.solidstatesciences.2025.108154

Sébastien Mathivet , Guillaume Dubois , Fabien Grasset , Stéphane Cordier , Franck Tessier

Transition metal nitrides and oxynitrides exhibit catalytic properties that make them promising candidates as alternatives to noble metals. A series of high-surface-area chromium oxynitrides, CrO_xN_1-x (0.10 < x < 0.25), was synthesized from a cheap hydroxide precursor and investigated as unconventional heterogeneous catalysts for the Water-Gas Shift (WGS) reaction. Currently, this reaction is predominantly catalyzed by platinum. Replacing platinum with chromium oxynitrides could provide a more cost-effective and environmentally friendly solution.

过渡金属氮化物和氧氮化物表现出催化性能，使它们成为贵金属替代品的有希望的候选者。以廉价的氢氧前驱体为原料合成了一系列高表面积氮化铬氧化物CrOxN1-x (0.10 < x < 0.25)，并研究了其作为水气转换（WGS）反应的非常规非均相催化剂。目前，该反应主要由铂催化。用氮化铬代替铂可以提供更具成本效益和更环保的解决方案。

引用次数: 0