Catalysis Today最新文献

Green approaches to nickel oxide nanoparticles: Visible-light-driven photocatalytic degradation of brilliant green, methyl orange dyes and antibiotic ciprofloxacin 氧化镍纳米颗粒的绿色途径：可见光驱动光催化降解亮绿、甲基橙染料和抗生素环丙沙星

IF 5.3 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today

Pub Date : 2026-01-29 DOI: 10.1016/j.cattod.2026.115696

Ishita Kapil , Pinky Yadav , Sachin Vats , Gourav Sharma , Anchita Das , Sambhunath Bera , Mrinal Dutta , Ayana Bhaduri

This work demonstrates a sustainable green synthesis of nickel oxide (NiO) nanoparticles using plant extracts from neem (Azadirachta indica), guava (Psidium guajava), and onion peel (Allium cepa), yielding NiO-N, NiO-G, and NiO-O respectively. The nanoparticles exhibited strong visible-light absorption, favorable morphology, high crystallinity, and crystallite sizes of 23 nm (NiO-N), 15 nm (NiO-G), and 13 nm (NiO-O) with surface areas of 64.17, 38.44 and 39.85 m²/g. Advanced characterizations (XRD, UV-Vis, PL, Raman, FESEM, FTIR, Zeta potential, XPS, BET) confirmed NiO nanoparticles formation, Ni-rich surface regions, and mixed-valence Ni²⁺/Ni³ ⁺ states enriched with oxygen vacancies. Photocatalytic studies under visible and natural sunlight revealed efficient degradation of Methyl Orange (89–96 %), Brilliant Green (87–90 %), and Ciprofloxacin (65–78.2 %), with enhanced performance in sunlight (up to 98 % for MO, 94 % for BG, and 85 % for CIF) within 160 mins. Radical scavenging experiments identified •OH as the dominant reactive species, supported by h⁺ and e⁻ contributions. The catalysts exhibited high stability and reusability, with only 7 % efficiency loss after four cycles. These findings highlight the potential of green-synthesized NiO nanoparticles as robust, eco-friendly photocatalysts for sustainable wastewater treatment.

本研究展示了利用印度楝树（Azadirachta indica）、番石榴（Psidium guajava）和洋葱皮（Allium cepa）的植物提取物可持续绿色合成氧化镍（NiO）纳米颗粒，分别产生NiO- n、NiO- g和NiO- o。纳米颗粒具有较强的可见光吸收，良好的形貌，高结晶度，晶粒尺寸分别为23 nm (NiO-N), 15 nm （NiO-G）和13 nm (NiO-O)，表面积分别为64.17,38.44和39.85 m²/g。高级表征（XRD、UV-Vis、PL、Raman、FESEM、FTIR、Zeta电位、XPS、BET）证实了NiO纳米颗粒的形成、富Ni的表面区域以及混合价Ni 2 + /Ni³ +富含氧空位的状态。在可见光和自然光下的光催化研究表明，甲基橙（89-96 %）、亮绿（87-90 %）和环丙沙星（65 - 78.2% %）的有效降解，在阳光下的性能在160 分钟内得到增强（MO高达98 %，BG为94 %，CIF为85 %）。自由基清除实验发现•OH是主要的活性物质，h⁺和e⁻也有贡献。催化剂具有较高的稳定性和可重复使用性，经过4次循环后，效率损失仅为7 %。这些发现突出了绿色合成的NiO纳米颗粒作为可持续废水处理的强大、环保光催化剂的潜力。

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引用次数: 0

Phyto-engineered CuO using Elettaria cardamomum: A visible-light-driven photocatalyst with antibacterial potential for environmental and biomedical applications 小豆蔻植物工程CuO：一种具有环境和生物医学应用抗菌潜力的可见光驱动光催化剂

IF 5.3 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today

Pub Date : 2026-01-28 DOI: 10.1016/j.cattod.2026.115697

Harpreet Kaur , Mir Waqas Alam , Mohammed Alsawat , Sanjeev Kumar , Ramandeep Kaur , Manesh A. Yewale , Chandra Kumar , Chinnasamy Sridevi , Gassoumi Bouzid , Mika Sillanpaa

A complete UHPLC-MS phytochemical profiling of Elettaria cardamomum pod extract was conducted, identifying a dominant terpenoid glycoside (m/z 694.185) alongside flavonoid and phenolic acids that collectively mediate reduction, nucleation, and capping in the green synthesis of CuO nanoparticles (EC:CuO NPs). The resulting EC:CuO NPs exhibited a monoclinic structure with Cu²⁺ oxidation state, diverse morphologies (35–600 nm), and high purity (Cu 74.99 wt%, O 25.01 wt%), as confirmed by XRD, XPS, FESEM/EDS. Significant Methyl Orange (MO) adsorption was observed after optimizing reaction parameters, while ROS-scavenger studies identified photogenerated holes (h⁺) as the dominant oxidative species, followed by •OH and O₂⁻• radicals. Under simulated solar irradiation (1 sun), EC:CuO NPs achieved 99 % MO degradation within 90 min, with a quantum yield of 1.60 × 10⁻⁴ molecules photon⁻¹ , a space-time yield of 7.98 × 10⁻⁶ molecules photon⁻¹ mg⁻¹ , and a rate constant (k) of 0.07332 min⁻¹ . The catalyst retained over 92 % efficiency after four reuse cycles. Agar-well assays demonstrated potent antibacterial activity with inhibition zones of 2.8 cm and 2.6 cm against S. aureus and P. aeruginosa, respectively, attributed by Cu²⁺-ion release and ROS-mediated membrane disruption. These findings establish EC:CuO NPs as a comprehensively characterized, dual-function material for sustainable dye mineralization and broad-spectrum antimicrobial applications.

对豆蔻豆荚提取物进行了全面的UHPLC-MS植物化学分析，鉴定出主要萜类苷（m/z 694.185）与类黄酮和酚酸共同介导CuO纳米颗粒（EC:CuO NPs）的绿色合成过程中的还原、成核和盖层。经XRD、XPS、FESEM/EDS证实，所得EC:CuO NPs具有单斜结构，Cu 2 +氧化态，形貌多样（35-600 nm），纯度高（Cu 74.99 wt%, O 25.01 wt%）。优化反应参数后观察到明显的甲基橙（MO）吸附，而ros -清除剂研究发现光生孔（h +）是主要的氧化物质，其次是•OH和O₂⁻-自由基。太阳在模拟太阳辐射(1),EC:措NPs莫退化90 分钟内达到99%,量子产率为1.60 ×10 ⁻⁴分子光子⁻¹ ,时空产生7.98 ×10 ⁻⁶分子光子⁻¹ mg⁻¹ ,速率常数(k)的0.07332 分钟⁻¹ 。经过四次重复使用，催化剂的效率保持在92%以上。琼脂井实验表明，Cu 2 +对金黄色葡萄球菌和铜绿假单胞菌的抑制区分别为2.8 cm和2.6 cm，这是由于Cu 2 +离子释放和ros介导的膜破坏所致。这些发现表明EC:CuO NPs是一种全面表征的双功能材料，具有可持续染料矿化和广谱抗菌应用。

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引用次数: 0

Forced concentration cycling of methane and air over Ni(-C)/NiAl2O4 produces less syngas with increasing pressure 甲烷和空气在Ni(c)/NiAl2O4上强制浓度循环产生的合成气随着压力的增加而减少

IF 5.3 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today

Pub Date : 2026-01-28 DOI: 10.1016/j.cattod.2026.115698

Nooshin Moradi , Dominic Eames , Daria C. Boffito , Federico Galli , Gregory S. Patience

Syngas is a feedstock for platform chemicals and fuels like methanol, ammonia and hydrocarbon liquids via Fischer–Tropsch synthesis. Chemical looping reforming has been under development for decades to produce syngas and comprises two interconnected vessels that cycle between a net reduction atmosphere and a net oxidation atmosphere. Rather than cycling solids, switching the gas feeds is an alternative approach to forced concentration cycling. Here, we tested a fixed bed reactor containing 5 g of Ni/NiAl₂O₄ as the catalyst, which alternated between NiC (reduction step) and Ni (oxidation step). A 4-way valve fed methane at

0.15 L / min

during the reduction cycle and 21% O₂/Ar mixture during the oxidation cycle, each cycle lasting 2 min. Methane conversion reached 98% above 800 °C and 0.1 MPa but to 75% at 2 MPa. Concurrently, the H₂ and CO selectivity also decreased. At all of the operating conditions, H₂ was the dominant product during the reduction cycle and CO predominated during the oxidation cycle. Over the course of a 6 h experiment, the H₂ and CO yield remained constant. Additionally, the residence time distribution analysis suggests the reactor operated in plug flow with Peclet numbers exceeding 70.

合成气是平台化学品和燃料（如甲醇、氨和碳氢化合物液体）的原料，通过费托合成。化学循环重整已经发展了几十年，用于生产合成气，包括两个相互连接的容器，在净还原气氛和净氧化气氛之间循环。而不是循环固体，切换气体进料是强制浓度循环的另一种方法。在固定床反应器中，以5 g Ni/NiAl2O4为催化剂，在NiC（还原步骤）和Ni（氧化步骤）之间交替进行反应。4通阀在还原循环中以0.15L/min的速度进料甲烷，在氧化循环中以21%的O2/Ar混合物进料，每个循环持续2 min。甲烷转化率在800℃和0.1 MPa时达到98%，在2 MPa时达到75%。同时，H2和CO的选择性也降低。在所有操作条件下，H2是还原循环的主导产物，CO是氧化循环的主导产物。在6小时的实验过程中，H2和CO的产率保持不变。此外，停留时间分布分析表明反应器运行在塞流中，Peclet数超过70。

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引用次数: 0

WO3-based solar photocatalysis for parabens removal: A study of synthesis methodology wo3基太阳光催化去除对羟基苯甲酸酯的合成方法研究

IF 5.3 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today

Pub Date : 2026-01-28 DOI: 10.1016/j.cattod.2026.115701

Eryk Fernandes , Catarina Ribeiro , Paweł Mazierski , Rui C. Martins , João Gomes

The use of visible light active materials in water decontamination is an interesting strategy to improve the feasibility of photocatalytic systems. Tungsten trioxide (WO₃) presents typically low-cost and simple production, good stability, and activity in the visible spectrum, especially compared to other metal oxides, such as TiO₂. Herein, two synthesis routes, sol-gel and hydrothermal, were explored, and key parameters (synthesis temperature and time, precursor ratio, pH, and calcination temperature) were varied to better understand their effect on the catalyst’s activity in the photocatalytic removal of a mixture of methyl-, ethyl-, and propylparabens under natural sunlight. Hydrothermal synthesis led to materials with better activity, achieving removals of 36.5 – 41.2 %, after 120 min under natural sunlight, using a catalyst synthesized at 150 ºC, pH of 0.5, during 24 h, and calcined at 500 ºC. The sol-gel method resulted in materials with an overall higher surface area, up to 81.9 m² g⁻¹, and synthesized in milder conditions, although the best catalyst produced achieved only up to 23.9 – 26.3 % parabens removal, synthesized with a 8:6 Na₂WO₄·2 H₂O:C₆H₈O₇ ratio, for 24 h at 25 ºC, and calcined at 500 ºC. The higher crystallinity degree obtained through the hydrothermal route may play a more relevant role in the final contaminants’ abatement. Besides, the good photochemical characteristics of WO₃, the synthesis method and its conditions have a crucial role in photocatalytic activity.

可见光活性材料在水净化中的应用是提高光催化系统可行性的一个有趣的策略。与其他金属氧化物（如TiO2）相比，三氧化钨（WO3）具有成本低、生产简单、稳定性好、可见光谱活性高等特点。本文探索了溶胶-凝胶和水热两种合成路线，并改变了关键参数（合成温度和时间、前驱物比、pH和煅烧温度），以更好地了解它们对天然光照下甲基、乙基和丙基对羟基苯甲酸酯混合物光催化脱除催化剂活性的影响。水热合成的材料具有更好的活性，在自然光照下120 min，使用在150℃，pH = 0.5下合成的催化剂，在24 h， 500℃下煅烧，达到36.5 - 41.2%的去除率。溶胶-凝胶法合成的材料总体比表面积更高，达到81.9 m2 g−1，合成条件更温和，但最佳催化剂的去除率仅为23.9 - 26.3%，以8:6 Na2WO4·2 H2O:C6H8O7的比例合成，在25℃下反应24 h，在500℃下煅烧。通过水热途径获得的较高结晶度可能在最终污染物的减排中发挥更重要的作用。此外，WO3良好的光化学特性、合成方法及其条件对其光催化活性有至关重要的作用。

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引用次数: 0

Hydrothermal synthesis of BiOX/Bi2WO6/Bi2S3 ternary heterostructures for enhanced solar light photocatalytic degradation of ciprofloxacin in aquatic media 水热合成bix /Bi2WO6/Bi2S3三元异质结构增强太阳光催化降解环丙沙星的水生介质

IF 5.3 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today

Pub Date : 2026-01-27 DOI: 10.1016/j.cattod.2026.115693

Muhammad Naeem , Muhammad Imran , Shoomaila Latif , Adnan Ashraf , Mohammad Mahbubul Hassan , Muhammad Naeem Khan

The presence of trace levels of antibiotics in drinking water poses a serious concern as it contributes to the development of antibiotic resistance in bacteria. In this study, various bismuth-based ternary heterostructure photocatalysts were synthesized by combining BiOX/Bi₂WO₆ (where X = Cl, Br, or I) heterostructures with Bi₂S₃ at a molar ratio of 1:1:1. The X-ray deffraction (XRD) and scanning electron microscopy (SEM) analyses confirmed the successful synthesis of BiOX/Bi₂WO₆/Bi₂S₃ ternary heterostructures with tunable band gaps, while the photoluminescence (PL) spectroscopy indicated enhanced charge separation. The photocatalytic performance of these ternary heterostructures was evaluated by degrading ciprofloxacin (CFX) in an aqueous solution under solar light. All the ternary heterostructures, namely BiOCl/Bi₂S₃/Bi₂WO₆ (BWS-Cl), BiOBr/Bi₂S₃/Bi₂WO₆ (BWS-Br), and BiOI/Bi₂S₃/Bi₂WO₆ (BWS-I), demonstrated excellent photodegradation of CFX within 120 min. The degradation rate constant (k) for CFX using the BWS-Cl heterostructure was 0.023 min⁻¹ . The effect of catalyst dosage, CFX concentration, and the initial pH of the drug solution on the photocatalytic degradation performance of CFX was also examined. Notably, the BWS-Cl exhibited the highest degradation efficiency at 96.6 %, achieved under sunlight with an optimized catalyst dosage of 0.6 g/L and an initial ciprofloxacin concentration of 5 ppm at a pH of 9.00. Based on the results from radical trapping experiments and PL analysis, a potential degradation mechanism for CFX by these heterostructures was proposed. The stable and reusable ternary heterostructure photocatalysts developed in this work may find applications in the removal of CFX and other similar emerging organic pollutants from potable water.

饮用水中微量抗生素的存在引起了严重的关注，因为它有助于细菌对抗生素产生耐药性。在本研究中，以Bi2S3和bix /Bi2WO6（其中X = Cl, Br, or I）异质结构以1:1:1的摩尔比组合，合成了多种铋基三元异质结构光催化剂。x射线衍射（XRD）和扫描电镜（SEM）分析证实成功合成了带隙可调的bix /Bi2WO6/Bi2S3三元异质结构，而光致发光（PL）光谱显示电荷分离增强。通过在日光下降解环丙沙星（CFX），评价了这些三元异质结构的光催化性能。所有三元异质结构BiOCl/Bi2S3/Bi2WO6 （BWS-Cl）、BiOBr/Bi2S3/Bi2WO6 （BWS-Br）和bii /Bi2S3/Bi2WO6 （BWS-I）在120 min内均表现出良好的光降解CFX性能。BWS-Cl异质结构对CFX的降解速率常数(k)为0.023 min⁻¹ 。考察了催化剂用量、CFX浓度和药物溶液初始pH对CFX光催化降解性能的影响。当催化剂用量为0.6 g/L，初始环丙沙星浓度为5 ppm， pH值为9.00时，BWS-Cl在阳光下的降解效率最高，达到96.6% %。基于自由基捕获实验和PL分析的结果，提出了这些异质结构对CFX的潜在降解机制。本研究开发的稳定且可重复使用的三元异质结构光催化剂可用于去除饮用水中的CFX和其他类似的新兴有机污染物。

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引用次数: 0

Catalytic performance of pelletized Ni-UGSO in steam methane reforming at elevated pressures 球团化Ni-UGSO在高压蒸汽甲烷重整中的催化性能

IF 5.3 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today

Pub Date : 2026-01-25 DOI: 10.1016/j.cattod.2026.115699

Muhammad Irfan Malik , Nicolas Abatzoglou , Jasmin Blanchard , Sabrina Bahia Karakache , Inès Esma Achouri

This study examines the performance of a Ni-UGSO catalyst for steam methane reforming under elevated pressure. The catalyst achieved near-equilibrium methane conversion at 11 bar and 820 °C with a steam-to-carbon ratio (S/C) of 2. Nickel supported on UGSO (upgraded slag oxides) pellets maintained stable activity within S/C = 1.7–2 at a gas hourly space velocity (GHSV) of 1000 L h⁻¹ kgcat⁻¹ . However, operation under lower steam conditions (S/C ≤ 1.5) led to surface pitting and the growth of bamboo-type carbon filaments, resulting in catalyst deactivation. After regeneration, the catalyst recovered its surface morphology and catalytic activity, achieving 80 % methane conversion and an H₂/CO ratio of 5.45 at 10 bar and 820 °C. The strong interaction between nickel and the spinel–silicate matrix minimised sintering and enhanced lattice oxygen mobility, as demonstrated by the detection of NiOOH and FeOOH species through various characterisation techniques. These results confirm the structural stability and regenerability of Ni-UGSO pellets during prolonged high-pressure syngas production.

本研究考察了Ni-UGSO催化剂在高压下用于蒸汽甲烷重整的性能。该催化剂在11 bar和820 ℃条件下实现了接近平衡的甲烷转化，蒸汽碳比（S/C）为2。在每小时气体空速（GHSV）为1000 L h⁻¹ kgcat⁻¹ 的情况下，由UGSO（升级后的氧化渣）颗粒支撑的镍在S/C = 1.7-2范围内保持稳定的活性。然而，在较低蒸汽条件下（S/C≤1.5）的操作会导致表面点蚀和竹型碳丝的生长，导致催化剂失活。再生后的催化剂恢复了其表面形态和催化活性，在10 bar和820 ℃条件下，甲烷转化率达到80%，H₂/CO比为5.45。镍和尖晶石-硅酸盐基体之间的强相互作用减少了烧结，增强了晶格氧迁移率，通过各种表征技术检测NiOOH和FeOOH证明了这一点。这些结果证实了Ni-UGSO球团在长时间高压合成气生产中的结构稳定性和可再生性。

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引用次数: 0

Construction of a Z-Scheme MIL-125@PCN-224 MOF-on-MOF heterojunction for efficient visible-light photodegradation of methylene blue Z-Scheme MIL-125@PCN-224 MOF-on-MOF异质结在可见光下对亚甲基蓝的高效降解

IF 5.3 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today

Pub Date : 2026-01-22 DOI: 10.1016/j.cattod.2026.115694

Yan-Qin Guo, Zhou Xu, Li Wen, Yun-Hui Cheng, Mao-Long Chen

The titanium-based metal–organic framework MIL-125(Ti), with a wide bandgap of 3.20 eV, suffers from poor visible-light utilization and rapid charge recombination. To overcome this limitation, a Z-scheme MOF-on-MOF heterojunction was constructed by integrating narrow-bandgap PCN-224 (1.70 eV) with MIL-125 using polyvinylpyrrolidone as a surfactant mediator. The formation of the heterojunction successfully reduced the optical bandgap to 2.23 eV, quantitatively confirming the extended visible-light harvesting. The resulting MIL-125@PCN-224 composite displayed outstanding photocatalytic activity toward methylene blue (MB) degradation. Under visible-light irradiation, it achieved 91.17 % MB (30 mg/L) removal within one hour, with a kinetic rate constant k_app of 0.0233 min⁻¹, which is 3.99 times higher than that of MIL-125. This enhanced performance is ascribed to the direct Z-scheme charge-transfer pathway. Band structure analysis provides quantitative support: the conduction band potentials of MIL-125 and PCN-224 were determined to be −0.63 V and −0.74 V vs. NHE, respectively. This configuration facilitates efficient charge separation while maintaining strong redox power, allowing electrons in PCN-224 to reduce O₂ to generate superoxide anions (·O₂⁻), consistent with the radical trapping and ESR identification of superoxide anions (·O₂⁻) and singlet oxygen (¹O₂) as the dominant reactive species. Furthermore, composite exhibited excellent stability over a wide pH range and maintained high efficiency in real water matrices. These results demonstrate that heterojunction construction is an effective strategy for enhancing photocatalytic efficiency.

钛基金属-有机骨架MIL-125（Ti）具有3.20 eV的宽带隙，可见光利用率差，电荷复合速度快。为了克服这一限制，采用聚乙烯吡咯烷酮作为表面活性剂介质，将窄带隙PCN-224（1.70 eV）与MIL-125进行积分，构建了Z-scheme MOF-on-MOF异质结。异质结的形成成功地将光学带隙减小到2.23 eV，定量地证实了可见光收获的延长。所得MIL-125@PCN-224复合材料对亚甲基蓝（MB）的降解表现出优异的光催化活性。在可见光照射下，1 h内对MB（30 mg/L）的去除率为91.17 %，动力学速率常数kapp为0.0233 min−1，是MIL-125的3.99倍。这种增强的性能归因于直接的Z-scheme电荷转移途径。带结构分析提供了定量支持：MIL-125和PCN-224的传导带电位相对于NHE分别为- 0.63 V和- 0.74 V。这种结构有利于有效的电荷分离，同时保持强大的氧化还原能力，允许PCN-224中的电子还原O2生成超氧阴离子（·O2−），这与超氧阴离子（·O2−）和单线态氧（1O2）作为优势反应物质的自由基捕获和ESR识别一致。此外，复合材料在较宽的pH范围内表现出优异的稳定性，并在实际水基质中保持高效率。这些结果表明异质结的构建是提高光催化效率的有效策略。

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引用次数: 0

Photocatalytic activation of peroxymonosulfate using spinel MnFe2O4, NiFe2O4 and CoFe2O4 catalysts for degradation of organic pollutants in wastewater 尖晶石MnFe2O4、NiFe2O4和CoFe2O4光催化活化过氧单硫酸盐降解废水中的有机污染物

IF 5.3 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today

Pub Date : 2026-01-22 DOI: 10.1016/j.cattod.2026.115695

Siphumelele Thandokwazi Mkhondwane , Yogendra Kumar , Vinod , Viswanadha Srirama Rajasekhar Pullabhotla

In this study, 1 mL of 0.1 M of peroxymonosulfate (PMS) was activated using 0.2 g of MnFe₂O₄, NiFe₂O₄ and CoFe₂O₄ in the presence of light. The catalysts were prepared using hydrothermal method and characterised with various spectroscopic and microscopic techniques. The catalysts were used for degradation of 5 mL of 20 mg/L of methylene blue and crystal violet dyes in wastewater by photocatalytic activation of PMS. CoFe₂O₄ showed higher activity with 92% and 100% efficiencies for methylene blue and crystal violet, respectively after 120 min. The reactive oxygen species (ROS) studies revealed that hydroxyl radicals (^●OH) were dominant species in photocatalytic degradation process, whereas sulfate radicals (SO₄^●-) were dominant species in PMS and photocatalytic PMS activation processes. The results showed that the synthesized catalysts are potential prospects for PMS activation for removal of organic pollutants in wastewater.

本研究采用0.2 g MnFe2O4、NiFe2O4和CoFe2O4在光照下活化1 mL的0.1 M过氧单硫酸根（PMS）。采用水热法制备了催化剂，并用各种光谱和显微技术对催化剂进行了表征。采用PMS光催化活化法降解废水中20 mg/L的亚甲基蓝和结晶紫染料5 mL。在120 min后，CoFe2O4对亚甲基蓝和结晶紫的效率分别为92%和100%。活性氧（ROS）研究表明，羟基自由基（●OH）在光催化降解过程中占主导地位，而硫酸盐自由基（SO4●-）在PMS和光催化PMS活化过程中占主导地位。结果表明，合成的催化剂在PMS活化去除废水中的有机污染物方面具有潜在的应用前景。

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引用次数: 0

Investigate biodiesel products using heterogeneous catalysts in variations lauric acid feedstock through elemental analysis and emissions testing using diesel engines 通过元素分析和柴油发动机排放测试，研究在不同月桂酸原料中使用多相催化剂的生物柴油产品

IF 5.3 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today

Pub Date : 2026-01-12 DOI: 10.1016/j.cattod.2026.115686

Anggara Dwita Burmana , Renita Manurung , Iriany , Taslim

Biodiesel, a sustainable alternative to fossil fuels, was produced using lauric acid derived from palm kernel and coconut oils and Amberlite HPR 1100 Na as a catalyst. The esterification process was conducted with varying catalyst concentrations (5 % to 20 %), molar ratio (5:1–8:1) and temperatures (65 °C to 80 °C), achieving optimal conversion rates of 93.5 % and 92.7 % for palm kernel and coconut oils, respectively, at 20 % catalyst concentration and 65 °C. The reusability of the catalyst showed promising results, maintaining high efficiency over seven cycles for palm kernel oil and six for coconut oil. Analytical techniques, including gas chromatography with flame ionization detection (GC-FID), scanning electron microscope (SEM), fourier transform infrared spectroscopy (FTIR), pyridine FTIR, brunauer-emmett-teller (BET) and elemental analysis confirmed the structural and compositional integrity of the catalyst and biodiesel produced. The results of the emissions analysis of biodiesel products, including CO, CO₂, NO_x, SO_x, hydrocarbons, and smoke opacity, as well as comparisons with petroleum diesel, are presented. This study aims to highlight the potential of Amberlite HPR 1100 Na in increasing the yield and sustainability of biodiesel by enabling its efficient reuse. Additionally, this study will examine the extent to which this biodiesel product generates emissions.

生物柴油是一种可持续的化石燃料替代品，它是用从棕榈仁和椰子油中提取的月桂酸和Amberlite HPR 1100 Na作为催化剂生产的。在不同的催化剂浓度（5 % ~ 20 %）、摩尔比（5:1 ~ 8:1）和温度（65 °C ~ 80 °C）条件下进行酯化反应，在催化剂浓度20 %和65 °C条件下，棕榈仁油和椰子油的最佳转化率分别为93.5 %和92.7 %。催化剂的可重复利用性显示出良好的效果，对棕榈仁油和椰子油分别在7次和6次循环中保持了较高的效率。分析技术，包括气相色谱火焰电离检测（GC-FID），扫描电镜（SEM），傅里叶变换红外光谱（FTIR），吡喃FTIR，布鲁诺尔-埃米特-泰勒（BET）和元素分析证实了催化剂和生物柴油的结构和组成的完整性。介绍了生物柴油产品的排放分析结果，包括CO、CO2、NOx、SOx、碳氢化合物和烟雾透明度，并与石油柴油进行了比较。本研究旨在强调Amberlite HPR 1100 Na在提高生物柴油产量和可持续性方面的潜力，使其能够有效地重复使用。此外，本研究将检查这种生物柴油产品产生排放的程度。

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引用次数: 0

In-plane Cu-Ag heterostructured holey nanoplates for efficient electroreduction of CO2 to ethylene 平面内Cu-Ag异质结构多孔纳米板用于CO2高效电还原制乙烯

IF 5.3 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today

Pub Date : 2026-01-08 DOI: 10.1016/j.cattod.2026.115682

Yang Li , Xiaoyi Guo , Yuanyuan Min , Haoyu Sun , Yingying Wang , Yanyun Ma , Yiqun Zheng , Hongwen Huang

The electrochemical CO₂ reduction reaction (CO₂RR) to multi-carbon (C₂₊) products like ethylene is promising for sustainable chemical production but is hindered by the sluggish kinetics of C–C coupling. Here, we report the design of in-plane Cu-Ag heterostructured holey nanoplates that efficiently overcome this limitation. This unique architecture, synthesized via a controlled etching/regrowth process, creates well-defined Cu and Ag phases within a single nanoplate, providing abundant active sites and enhanced mass transport. The optimized catalyst achieves a remarkable Faradaic efficiency of 53.6 % for ethylene with a high partial current density of 222.4 mA·cm⁻² at −0.9 V vs. RHE, significantly outperforming pure Cu. Density Functional Theory (DFT) calculations reveal that the Ag domains optimize the binding energies of key *CO intermediates, thereby lowering the energetic barrier for the critical C–C coupling step. This work highlights the synergistic potential of in-plane heterostructuring for designing advanced electrocatalysts.

电化学CO₂还原反应（CO₂RR）到多碳（C₂₊）产品，如乙烯，是有希望的可持续化学生产，但阻碍了缓慢的动力学的C - C耦合。在这里，我们报道了平面内Cu-Ag异质结构多孔纳米板的设计，有效地克服了这一限制。这种独特的结构，通过受控的蚀刻/再生过程合成，在单个纳米板内创建了明确的Cu和Ag相，提供了丰富的活性位点和增强的质量传输。优化后的催化剂对乙烯的法拉第效率为53.6 %，在−0.9 V相对于RHE时的分电流密度为222.4 mA·cm⁻²，明显优于纯Cu。密度泛函理论（DFT）计算表明，Ag结构域优化了关键*CO中间体的结合能，从而降低了关键C-C耦合步骤的能垒。这项工作突出了平面内异质结构在设计先进电催化剂方面的协同潜力。

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引用次数: 0