Inorganic Chemistry Communications最新文献_第7页

Anticancer evaluation of Co(III) complex derived from 1-isonicotinoyl-4-(4-nitrophenyl)-3-thiosemicarbazide: Structural characterization, photophysical, and Hirshfeld studies 1-isonicotinoyl-4-(4-nitrophenyl)-3-thiosemicarbazide 的 Co(III) 复合物的抗癌评估：结构表征、光物理和 Hirshfeld 研究

IF 4.4 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Communications

Pub Date : 2024-11-15 DOI: 10.1016/j.inoche.2024.113521

Ram Nayan Gautam , Alok Shukla , Suryansh Chandra , Sundeep Kumar , A. Acharya , Mamata Singh , R.J. Butcher , M.K. Bharty

A new cationic complex, [Co((intph)(en)₂]Cl, derived from the 1-isonicotinoyl-4-(4-nitrophenyl)-3-thiosemicarbazide (H₂intph), is reported. The synthesized ligand and its corresponding Co(III) complex were successfully characterized by applying FT-IR and UV–visible spectroscopic techniques and single crystal ray diffraction data. Molecular geometries of the ligand and its Co(III) complex were accurately determined from their respective X-ray crystallographic analysis. The ligand and [Co((intph)(en)₂]Cl crystallize in Triclinic and monoclinic systems with space groups P-1 and P 2₁/n, respectively. The crystal structures of H₂intph and [Co((intph)(en)₂]Cl are stabilized by weak C-H⋯O, N-H⋯O, and C-H⋯Cl hydrogen bonding interactions. Hirshfeld surface analysis was accomplished to investigate intermolecular hydrogen bonding interactions found in ligand H₂intph and [Co((intph)(en)₂]Cl. The cytotoxicity of the ligand and the complex [Co((intph)(en)₂]Cl was assessed for their anticancer potential against human glioblastoma (U87) and Dalton lymphoma (DL) cell lines. The complex exhibited IC₅₀ values of 100 μg/mL for U87 cells and 120 μg/mL for DL cells, indicating the concentration at which 50 % of cell viability was inhibited. In comparison, the ligand was less effective in the MTT assay against both U87 and DL cells. These results suggest that the complex [Co((intph)(en)₂]Cl significantly reduces glioblastoma cell viability. Treatment with the complex induced cell death through both apoptotic and necrotic pathways, as evidenced by Hoechst/PI double staining. Additionally, there was an increase in intracellular reactive oxygen species (ROS), highlighting the role of oxidative stress in the anticancer activity of the [Co((intph)(en)₂]Cl complex. Furthermore, fluorescence studies were carried out which revealed the order of fluorescence behaviors between the ligand and the Co(III) complex to be Co(III) complex > H₂intph.

报告了一种新的阳离子配合物[Co((intph)(en)2]Cl，由 1-异烟酰胺基-4-(4-硝基苯基)-3-硫代氨基脲（H2intph）衍生而来。通过应用傅立叶变换红外光谱、紫外可见光谱技术和单晶射线衍射数据，成功地对合成的配体及其相应的 Co(III) 复合物进行了表征。配体及其 Co（III）配合物的分子几何形状是通过各自的 X 射线晶体分析准确确定的。配体和[Co((intph)(en)2]Cl分别在空间群为 P-1 和 P 21/n 的三斜系和单斜系中结晶。H2intph和[Co((intph)(en)2]Cl的晶体结构通过微弱的C-H⋯O、N-H⋯O和C-H⋯Cl氢键相互作用而稳定。为了研究配体 H2intph 和[Co((intph)(en)2]Cl 中发现的分子间氢键相互作用，我们进行了 Hirshfeld 表面分析。评估了配体和[Co((intph)(en)2]Cl 复合物对人类胶质母细胞瘤（U87）和道尔顿淋巴瘤（DL）细胞系的抗癌潜力。该复合物对 U87 细胞的 IC50 值为 100 μg/mL，对 DL 细胞的 IC50 值为 120 μg/mL，即抑制 50% 细胞活力的浓度。相比之下，配体在 MTT 试验中对 U87 和 DL 细胞的抑制作用较弱。这些结果表明，[Co((intph)(en)2]Cl 复合物能显著降低胶质母细胞瘤细胞的活力。Hoechst/PI 双染色法证明，用该复合物处理可通过凋亡和坏死两种途径诱导细胞死亡。此外，细胞内活性氧（ROS）也有所增加，凸显了氧化应激在[Co((intph)(en)2]Cl 复合物抗癌活性中的作用。此外，还进行了荧光研究，结果显示配体与 Co（III）络合物之间的荧光行为顺序为 Co（III）络合物 > H2intph。

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引用次数: 0

Synthesis structural and thermal properties of 30Li2O-20ZnO-xB2O3-(50-x) P2O5 borophosphate glasses with varying B2O3 content 不同 B2O3 含量的 30Li2O-20ZnO-xB2O3-(50-x) P2O5 磷硼玻璃的合成、结构和热性能

IF 4.4 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Communications

Pub Date : 2024-11-15 DOI: 10.1016/j.inoche.2024.113542

Khadija Bougrine , Issam Saber , Lahcen Boudad , Soumya Ferraa , Hanane Barebita , Rachid Hsissou , Mustapha Belfaquir , M’hamed Taibi , Mohamed Salahdine El Youbi

A borophosphate system with the composition 30Li₂O-20ZnO-xB₂O₃-(50-x) P₂O₅ (where x = 0, 10, and 45 mol%) has been successfully synthesized using the conventional melt-quenching technique. The resulting materials were analyzed for their amorphous and vitreous properties using X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The study focused on the impact of boron doping on thermal properties, specifically examining the glass transition temperature (T_g), crystallization temperature (T_c), and overall thermal stability. Structural analysis was further supported by Raman spectroscopy, providing insights into the network structure of the glasses. Morphological characteristics and elemental composition were analyzed using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS).

采用传统的熔淬技术，成功合成了成分为 30Li2O-20ZnO-xB2O3-(50-x) P2O5（其中 x = 0、10 和 45 mol%）的磷酸硼体系。利用 X 射线衍射 (XRD) 和差示扫描量热 (DSC) 分析了所得材料的无定形和玻璃体特性。研究重点是掺硼对热性能的影响，特别是玻璃化转变温度（Tg）、结晶温度（Tc）和整体热稳定性。拉曼光谱进一步支持了结构分析，为了解玻璃的网络结构提供了依据。扫描电子显微镜（SEM）和能量色散 X 射线光谱（EDS）分析了玻璃的形态特征和元素组成。

引用次数: 0

Exploring antidiabetic & antibacterial potential of Ag/MgO-NCs mediated via Ficus auriculata: Experimental and computational analysis 探索通过榕树介导的 Ag/MgO-NCs 的抗糖尿病和抗菌潜力：实验和计算分析

IF 4.4 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Communications

Pub Date : 2024-11-15 DOI: 10.1016/j.inoche.2024.113550

Aayasha Negi , Garima Tamta , Minakshi Pandey , Arif Khan , Mohamed Taha Yassin , Fatimah O. Al –Otibi , Nisha Mehra

This study investigates the antidiabetic and antibacterial potential of Ag/MgO-nanocomposites (NCs) through a combined experimental and computational approach. The Ag/MgO-NCs were synthesized using the methanolic extract of Ficus.auriculata. Experimental characterization techniques including UV–Vis spectroscopy, FTIR, XRD, SEM-EDX, and TEM revealed an average particle size of 21.29 nm. GC–MS analysis identified Oleic acid as the major component (85.71 %). Additionally, the antibacterial efficacy of Ag/MgO-NCs was tested against Escherichia coli, Staphylococcus aureus and Streptococcus typhii showing inhibition zones of up to 16 mm at 800 µg/mL. In vitro antidiabetic studies further demonstrated strong α-amylase and α-glucosidase inhibition with IC₅₀ values of 230.4 µg/mL and 230.16 µg/mL respectively. Computational molecular docking studies revealed a high binding affinity having a docking score −6.353 kcal/mol against maltase-glucoamylase. Moreover, in silico ADMET analysis confirmed the drug-like properties of the NCs. This integrative experimental and computational study highlights the therapeutic potential of Ag/MgO-NCs for diabetes management and bacterial infection control.

本研究通过实验和计算相结合的方法研究了 Ag/MgO 纳米复合材料（NCs）的抗糖尿病和抗菌潜力。Ag/MgO-NCs 是用榕树的甲醇提取物合成的。实验表征技术包括紫外可见光谱、傅立叶变换红外光谱、XRD、SEM-EDX 和 TEM，结果表明其平均粒径为 21.29 nm。气相色谱-质谱分析确定油酸为主要成分（85.71%）。此外，Ag/MgO-NCs 还对大肠杆菌、金黄色葡萄球菌和伤寒链球菌进行了抗菌效果测试，结果表明，在 800 µg/mL 的浓度下，抑制区可达 16 mm。体外抗糖尿病研究进一步显示了对α-淀粉酶和α-葡萄糖苷酶的强烈抑制作用，IC50 值分别为 230.4 µg/mL 和 230.16 µg/mL。计算分子对接研究显示，该化合物与麦芽糖酶-葡萄糖淀粉酶的结合亲和力很高，对接得分为 -6.353 kcal/mol。此外，硅学 ADMET 分析也证实了 NCs 的类药物特性。这项综合实验和计算研究凸显了 Ag/MgO-NCs 在糖尿病治疗和细菌感染控制方面的治疗潜力。

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引用次数: 0

Optical performance and luminescence properties of Dy3+-doped LaMgB5O10 phosphors 掺杂 Dy3+ 的 LaMgB5O10 荧光粉的光学性能和发光特性

IF 4.4 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Communications

Pub Date : 2024-11-15 DOI: 10.1016/j.inoche.2024.113540

Jabir Hakami , U.H. Kaynar , M.B. Coban , H. Aydin , R. Alamri , D.A. Jabali , N. Can

Despite significant advancements in borate-based phosphors, improving luminescent efficiency and thermal stability, particularly at high temperatures, remains a persistent challenge. In this study, Dy³⁺-doped LaMgB₅O₁₀ (LMBO) phosphors were synthesized and characterized for their photoluminescent properties to address these issues. Under 344 nm excitation, the Dy³⁺-activated LMBO phosphors exhibited strong luminescence with characteristic peaks at 482 nm (blue), 578 nm (yellow), and 663 nm (red), corresponding to specific Dy³⁺ transitions. Optimal luminescence was achieved at a doping level of 2 wt% Dy³⁺, beyond which quenching effects reduced emission intensity. The critical quenching distance (

R_{c}

) was estimated at 24.66 Å, indicating predominant non-radiative energy transfer. Moreover, thermal quenching was reduced, with the activation energy for thermal quenching determined to be 0.1975 eV, demonstrating that the material can maintain reasonable luminescence efficiency at elevated temperatures. Time-resolved photoluminescence spectroscopy revealed multi-exponential decay behavior, indicating the presence of multiple decay processes. The average luminescence lifetimes were calculated as 632 µs for the 2 wt% Dy³⁺ sample and 539 µs for the 3 wt% Dy³⁺ sample, with a clear concentration quenching effect observed at higher dopant levels. Colorimetric analysis in the CIE 1931 color space revealed a shift toward yellow with increasing Dy³⁺ concentration, achieving a correlated color temperature (CCT) of 6595 K at 2 wt% Dy³⁺. This shift supports the material’s potential for photonic and lighting applications. These findings highlight a significant advancement in addressing the thermal stability issue in phosphor materials, making Dy³⁺-doped LMBO phosphors promising candidates for advanced photonic technologies.

尽管硼酸盐基荧光粉取得了重大进展，但提高发光效率和热稳定性，尤其是高温下的发光效率和热稳定性，仍然是一个长期存在的挑战。为了解决这些问题，本研究合成了掺杂 Dy3+ 的 LaMgB5O10（LMBO）荧光粉，并对其光致发光特性进行了表征。在 344 纳米波长的激发下，Dy3+ 激活的 LMBO 磷光体发出强烈的荧光，在 482 纳米波长（蓝色）、578 纳米波长（黄色）和 663 纳米波长（红色）处出现特征峰，与特定的 Dy3+ 转变相对应。2 wt% Dy3+ 的掺杂水平达到了最佳发光效果，超过这一水平，淬火效应会降低发射强度。临界淬火距离（Rc）估计为 24.66 Å，表明非辐射能量转移占主导地位。此外，热淬灭也有所减少，热淬灭的活化能被测定为 0.1975 eV，这表明该材料在高温下也能保持合理的发光效率。时间分辨光致发光光谱显示了多指数衰变行为，表明存在多个衰变过程。根据计算，2 wt% Dy3+ 样品的平均发光寿命为 632 µs，3 wt% Dy3+ 样品的平均发光寿命为 539 µs，在较高的掺杂水平下观察到明显的浓度淬灭效应。在 CIE 1931 色彩空间中进行的色度分析表明，随着 Dy3+ 浓度的增加，色温向黄色偏移，2 wt% Dy3+ 时的相关色温 (CCT) 为 6595 K。这种转变支持了该材料在光子和照明应用方面的潜力。这些发现凸显了在解决荧光粉材料热稳定性问题方面取得的重大进展，使掺杂 Dy3+ 的 LMBO 荧光粉成为先进光子技术的理想候选材料。

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引用次数: 0

Mn-MOF based electrochemical sensor for highly detection of poisonous rat bait (Bromadiolone) 基于 Mn-MOF 的电化学传感器用于高度检测有毒鼠饵（溴敌隆）

IF 4.4 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Communications

Pub Date : 2024-11-15 DOI: 10.1016/j.inoche.2024.113554

Ayman S. Eliwa , Perihan A. Khalaf-Alla , Mostafa A. Besher , Gehad G. Mohamed , Safa S. EL-Sanafery

Bromadiolone is a potent rodenticide used to control rat and mouse populations. Because of its anticoagulant properties, it prevents blood clots by interfering with the vitamin K cycle. While effective in pest control, its impact extends beyond the targeted species. Bromadiolone poses significant risks to non-target wildlife, particularly predators and scavengers that may consume poisoned rodents, leading to secondary poisoning. Metal-organic frameworks (MOFs) are a significant class of porous materials that have garnered substantial attention in recent years due to their unique properties and potential applications. Using the sonochemical approach, a novel metal–organic framework (MOF) combining manganese and ligand generated from 2-carboxy-benzaldehyde and 4-aminobenzoic acid has been synthesized. The resulting crystalline material were examined using a range of analytical methods, including thermal analysis, scanning electron microscope (SEM), energy dispersive Xray (EDX), powder X-ray diffraction (PXRD), Fourier-Transform infrared spectroscopy (FT-IR) and (BET) surface area. The findings of the BET study showed that the surface area was 1106.65 m² g⁻¹. The computed total pore volume was 1.81 cm³ g⁻¹, with an average pore size of 3.27 nm. The newly synthesized Mn-MOF is used in the electrochemical detection of a potent anticoagulant rodenticide bromadiolone, which represented a significant advancement in chemistry. The existence of Mn in the MOF structure enhanced its electrochemical properties, allowing for the sensitive detection of bromadiolone in oats and maize samples.

溴敌隆是一种强效杀鼠剂，用于控制老鼠数量。由于其抗凝血特性，它可以通过干扰维生素 K 循环来防止血栓形成。虽然能有效控制害虫，但其影响超出了目标物种的范围。溴敌隆会对非目标野生动物造成严重危害，尤其是捕食者和食腐动物，它们可能会吃掉中毒的啮齿动物，导致二次中毒。金属有机框架（MOFs）是一类重要的多孔材料，近年来因其独特的性质和潜在的应用而备受关注。利用声化学方法，我们合成了一种新型金属有机框架（MOF），它结合了锰和由 2-羧基苯甲醛和对氨基苯甲酸生成的配体。研究人员采用一系列分析方法，包括热分析、扫描电子显微镜 (SEM)、能量色散 X 射线 (EDX)、粉末 X 射线衍射 (PXRD)、傅立叶变换红外光谱 (FT-IR) 和 (BET) 表面积，对合成的晶体材料进行了检测。BET 研究结果表明，表面积为 1106.65 平方米 g-1。计算得出的总孔隙体积为 1.81 cm3 g-1，平均孔径为 3.27 nm。新合成的 Mn-MOF 被用于电化学检测强效抗凝血灭鼠剂溴敌隆，这是化学领域的一大进步。MOF 结构中锰的存在增强了其电化学特性，从而可以灵敏地检测燕麦和玉米样品中的溴敌隆。

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引用次数: 0

A newer electrochemical technique to use europium-doped CaZrO3 nanoparticles: Dopamine sensing and energy storage application 使用掺铕 CaZrO3 纳米粒子的新型电化学技术：多巴胺传感和储能应用

IF 4.4 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Communications

Pub Date : 2024-11-15 DOI: 10.1016/j.inoche.2024.113552

Nandini Robin Nadar , J. Deepak , S.C. Sharma , B.R. Radha Krushna , S. Vijayanand , S.T. Elayakumar , Swati Mishra , D. Veera Vanitha , H. Nagabhushana

This research focuses on the critical need for more efficient and stable materials in biosensing and energy storage, driven by the growing demand for accurate medical diagnostics and renewable energy solutions. In this study, Europium (Eu) doping was employed to enhance the performance of CaZrO₃ for dopamine detection and supercapacitor applications. Europium-doped CaZrO₃ (ECZO) nanoparticles were synthesized and incorporated into a modified carbon paste electrode (MCPE) for dopamine detection. Cyclic voltammetry (CV) and Differential Pulse Voltammetry (DPV) analyses revealed significant improvements in dopamine detection, with ECZO-MCPE achieving a peak current of 78.9 µA, a detection limit of 0.455 µM, and a quantification limit of 1.514 µM. The ECZO-MCPE also demonstrated remarkable stability, retaining 92 % of its activity after 20 cycles. In supercapacitor applications, ECZO NPs exhibited a specific capacitance of 243 F/g at a current density of 0.0005 A and an energy density of 48.6 Wh/kg at a power density of 1000 W/kg, with 86.48 % capacitance retention after 5000 charge–discharge cycles. These findings indicate that ECZO NPs are highly effective in enhancing electrode performance and hold promise for future advancements in biosensing and energy storage technologies.

这项研究的重点是，在精确医疗诊断和可再生能源解决方案需求不断增长的推动下，生物传感和能源存储领域对更高效、更稳定材料的迫切需求。本研究采用掺杂铕（Eu）的方法来提高 CaZrO3 在多巴胺检测和超级电容器应用中的性能。研究人员合成了掺铕的 CaZrO3（ECZO）纳米粒子，并将其加入到改性碳浆电极（MCPE）中，用于多巴胺检测。循环伏安法（CV）和差分脉冲伏安法（DPV）分析表明，ECZO-MCPE 的峰值电流为 78.9 µA，检测限为 0.455 µM，定量限为 1.514 µM，大大提高了多巴胺的检测能力。ECZO-MCPE 还表现出卓越的稳定性，在 20 个周期后仍能保持 92% 的活性。在超级电容器应用中，ECZO NPs 在电流密度为 0.0005 A 时的比电容为 243 F/g，在功率密度为 1000 W/kg 时的能量密度为 48.6 Wh/kg，5000 次充放电循环后的电容保持率为 86.48%。这些研究结果表明，ECZO NPs 在提高电极性能方面非常有效，有望在未来推动生物传感和储能技术的发展。

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引用次数: 0

Efficient CeO2/ZnO heterojunction for enhanced heterogeneous photocatalytic application 用于增强异相光催化应用的高效 CeO2/ZnO 异质结

IF 4.4 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Communications

Pub Date : 2024-11-15 DOI: 10.1016/j.inoche.2024.113553

Honglin Li , Rong Wu , Jun Ji , Yue Liu , Jiahui Zhao , Shafaq Sahar , Akif Zeb

Organic pollutants pose a significant challenge due to their toxicity and potential carcinogenicity, thereby posing a severe threat to the environment and human health. Heterogeneous photocatalysts offer promising advantages over traditional water purification methods due to their tunable electronic properties such as bandgap, easy separation from the reaction solution and formidable nanostructures. Herein, we prepare a CeO₂/ZnO heterostructure via simple hydrothermal synthesis. The electronic structure of this nanocomposite was tuned to achieve a band gap of ∼2.94 eV, which was between the individual bandgaps of CeO₂ and ZnO nanoparticles. In addition, the mixed valence character of Ce further enhanced the electronic properties of the CeO₂/ZnO heterostructure. The photocatalytic performance of CeO₂, ZnO and CeO₂/ZnO heterostructure was evaluated and it was found that CeO₂/ZnO heterostructure with a Zn/Ce ratio of 0.2 exhibited the highest photocatalytic activity, where the degradation efficiency was 99.28 % after irradiation for 60 min. It was mainly ascribed to the heterojunction structure of the CeO₂/ZnO nanocomposite, leading to a higher separation efficiency of electron-hole pairs and generating more superoxide radicals, which in turn improved the photocatalytic activity effectively.

有机污染物因其毒性和潜在致癌性，对环境和人类健康构成了严重威胁，是一项重大挑战。与传统的水净化方法相比，异质光催化剂因其可调的电子特性（如带隙）、易于从反应溶液中分离以及可塑的纳米结构而具有广阔的前景。在此，我们通过简单的水热合成制备了 CeO2/ZnO 异质结构。通过调整该纳米复合材料的电子结构，使其带隙达到 2.94 eV，介于 CeO2 和 ZnO 纳米粒子的带隙之间。此外，Ce 的混价特性进一步增强了 CeO2/ZnO 异质结构的电子特性。对 CeO2、ZnO 和 CeO2/ZnO 异质结构的光催化性能进行了评估，发现 Zn/Ce 比为 0.2 的 CeO2/ZnO 异质结构具有最高的光催化活性，照射 60 分钟后的降解效率为 99.28%。这主要归因于 CeO2/ZnO 纳米复合材料的异质结结构导致了更高的电子-空穴对分离效率，产生了更多的超氧自由基，从而有效提高了光催化活性。

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引用次数: 0

Bio-templated Ni/MgO-Al2O3 as an efficient catalyst toward methane dry reforming 生物模板 Ni/MgO-Al2O3 作为甲烷干转化的高效催化剂

IF 4.4 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Communications

Pub Date : 2024-11-15 DOI: 10.1016/j.inoche.2024.113557

Shabnam Yousefi , Mina Tavakolian , Mohammad Reza Rahimpour

Following the principles of green chemistry and recognizing the significant role of catalysts in chemical transformations, this study explores the impact of walnut and almond shells as bio-templates on the physical properties and catalytic performance of mesoporous Ni/MgO-Al₂O₃ in methane dry reforming. At the same time, by incorporating magnesium as a promoter and employing walnut and almond shells as bio-templates, we achieved a uniform distribution of Ni particles and a more porous structure with a larger surface area for the synthesized catalysts. These findings were validated through X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), Scanning Electron Microscopy (SEM), Temperature-programmed reduction (TPR), Raman, and Thermogravimetric analysis (TGA) analyses. Based on findings, bio-templates, particularly the walnut shell, can enhance the catalyst’s physical properties. This includes structural and catalytic properties modifications, leading to higher surface areas, improved nickel dispersion, and increased carbon deposition and sintering resistance, resulting in superior catalytic performance in methane dry reforming. Surprisingly, the synthesized catalyst using walnut bio-template could effectively improve the catalyst performance of the Ni/MgO-Al₂O₃ closer to equilibrium values, which is highly desirable.

本研究遵循绿色化学原理，认识到催化剂在化学转化中的重要作用，探讨了核桃壳和杏仁壳作为生物模板对甲烷干重整中介孔 Ni/MgO-Al2O3 物理性质和催化性能的影响。同时，通过加入镁作为促进剂并使用核桃壳和杏仁壳作为生物模板，我们实现了镍颗粒的均匀分布，并使合成的催化剂具有更大表面积的多孔结构。这些发现通过 X 射线衍射 (XRD)、Brunauer-Emmett-Teller (BET)、扫描电子显微镜 (SEM)、温度编程还原 (TPR)、拉曼和热重分析 (TGA) 分析得到了验证。根据研究结果，生物模板，尤其是核桃壳，可以增强催化剂的物理特性。这包括结构和催化特性的改变，从而提高了表面积、改善了镍的分散性、增加了碳沉积和抗烧结性，从而在甲烷干重整中实现了卓越的催化性能。令人惊讶的是，使用核桃生物模板合成的催化剂能有效提高 Ni/MgO-Al2O3 的催化剂性能，使其更接近平衡值，这是非常理想的。

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引用次数: 0

The performance of PdNi alloy catalysts supported on glassy carbon electrode toward formic acid electro-oxidation 玻璃碳电极支撑的钯镍合金催化剂在甲酸电氧化中的性能

IF 4.4 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Communications

Pub Date : 2024-11-15 DOI: 10.1016/j.inoche.2024.113501

Azar Gharib, Ali Arab

In this research, PdNi alloy electrocatalysts with different compositions were prepared using the hydrothermal method and characterized using FE-SEM, EDX, and XRD analyses. The electro-oxidation of formic acid was investigated on the prepared samples using electrochemical techniques. It was observed that the electrocatalytic activity as well as the stability of samples were increased by increasing the Ni content. Among the studied samples, the PdNi_4.09 sample exhibited superior electrocatalytic activity with a mass activity of 2982.46 mA/mg_Pd which was considerably higher than commercial Pd/C catalyst. Additionally, the PdNi_4.09 sample was the most effective sample against CO intermediate poisoning. The role of Ni was attributed to the formation of Ni–O or Ni–OH entities near the Pd site that accelerated the oxidation of Pd–CO entities and therefore reduced the poisoning of Pd active sites for formic acid oxidation.

本研究采用水热法制备了不同成分的钯镍合金电催化剂，并利用 FE-SEM、EDX 和 XRD 分析对其进行了表征。利用电化学技术对制备的样品进行了甲酸电氧化研究。结果表明，随着镍含量的增加，样品的电催化活性和稳定性都有所提高。在所研究的样品中，PdNi4.09 样品表现出更高的电催化活性，其质量活性为 2982.46 mA/mgPd，大大高于商用 Pd/C 催化剂。此外，PdNi4.09 样品是防止 CO 中间体中毒最有效的样品。镍的作用归因于在 Pd 位点附近形成了 Ni-O 或 Ni-OH 实体，从而加速了 Pd-CO 实体的氧化，因此减少了甲酸氧化过程中 Pd 活性位点的中毒。

引用次数: 0

Comparative study of zirconium-zinc oxide thin films on ceramic and glass substrates: Structural, optical, and photocatalytic properties 陶瓷和玻璃基底上氧化锆-氧化锌薄膜的比较研究：结构、光学和光催化特性

IF 4.4 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Communications

Pub Date : 2024-11-15 DOI: 10.1016/j.inoche.2024.113561

Dikra Bouras , Mamoun Fellah , Regis Barille , Madiha Zerouali , Nawel Hambli , Gamal A. El-Hiti

This study investigates the structural, optical, and photocatalytic properties of zirconium-doped zinc oxide (Zr) thin films deposited on ceramic and glass substrates. X-ray diffraction (XRD) analysis revealed that all samples exhibited a polycrystalline wurtzite structure, with grain sizes ranging from 25 to 43 nm for ceramic substrates and 19 to 32 nm for glass substrates. UV–visible absorbance measurements indicated that Zr films absorbed visible light around 410 nm, with the band gap widening to 2.93 eV on ceramic substrates. Scanning electron microscopy (SEM) showed that Zr doping significantly affected the morphology of thin films, resulting in rougher surfaces and larger grains on ceramic substrates. Photocatalytic tests demonstrated that the 5 wt% Zr on DD1Z ceramic achieved a degradation efficiency of 61.44 % for orange II dye after 5 h of UV irradiation. In contrast, Zr on ceramic substrates achieved only 18.56 %, and the bare DD1Z substrate reached just 4.02 %. These findings highlight the superior photocatalytic performance of Zr on ceramic substrates, indicating their potential for advanced water purification technologies. The mechanism of photolysis was investigated using hole/radical scavengers, revealing that Zr-ZnO networks enhance the adsorption of hydroxyl ions on the surface. This acts as a trap site, reducing hole/electron pair recombination and thus increasing activity and photodegradation efficiency.

本研究探讨了沉积在陶瓷和玻璃基底上的掺锆氧化锌（Zr）薄膜的结构、光学和光催化特性。X 射线衍射（XRD）分析表明，所有样品都呈现出多晶钨酸盐结构，陶瓷基底的晶粒大小在 25 至 43 纳米之间，玻璃基底的晶粒大小在 19 至 32 纳米之间。紫外-可见吸收率测量结果表明，Zr 薄膜吸收 410 纳米波长左右的可见光，陶瓷基底的带隙扩大到 2.93 eV。扫描电子显微镜（SEM）显示，掺杂 Zr 显著影响了薄膜的形态，导致陶瓷基底上的薄膜表面更粗糙，晶粒更大。光催化测试表明，在紫外线照射 5 小时后，DD1Z 陶瓷上 5 wt% 的 Zr 对橙 II 染料的降解效率达到 61.44%。相比之下，陶瓷基底上的 Zr 降解效率仅为 18.56%，而裸露的 DD1Z 基底仅为 4.02%。这些发现凸显了陶瓷基底上的 Zr 具有卓越的光催化性能，表明其具有应用于先进水净化技术的潜力。利用空穴/自由基清除剂对光解机制进行了研究，发现 Zr-ZnO 网络增强了表面对羟基离子的吸附。这就起到了捕集作用，减少了空穴/电子对重组，从而提高了活性和光降解效率。

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