Materials Today Sustainability最新文献_第3页

A review on recent advances in oriented thermally conductive phase change composites: Preparation, characteristics and applications 定向导热相变复合材料最新进展综述：制备、特性和应用

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-10-28 DOI: 10.1016/j.mtsust.2024.101026

Zhu Jiang , Xinyi Li , Bohao Peng , Shifang Huang , Xiaosong Zhang , Yulong Ding

Oriented thermally conductive phase change composites (PCCs) have attracted significant attention in recent years for their super directional thermal conductivity with a relatively small amount of thermally conductive enhancers (TCEs) and hence less compromise in PCC energy density. Given their unique characteristics and potential applications, this article for the first time provides a comprehensive review of the latest development in the area, covering anisotropic morphologies, heat transfer characteristics, preparation routes, as well as their applicability to their diverse range of potential applications. The review systematically compares the characteristics of oriented thermally conductive PCCs attained through the use of one-dimensional (1D), two-dimensional (2D) and three-dimensional (3D) TCEs, respectively. The alignment of highly oriented 1D/2D TCEs is responsible for the enhanced thermal conduction performance, but weak interactions at the interface and the associated thermal resistance are found to be significant barriers that limit the extent of the thermal conductivity enhancement. 3D TCEs are likely to offer continuous conductive networks, as well as PCM shape stabilisation. Based on different characteristics of the TCEs, a relationship is established between anisotropic thermal conductivity of the PCCs and key parameters including concentration, geometry (e.g. dimension, aspect ratio) and the extent of TCE alignment. Additionally, different preparation routes to construct highly oriented thermally conductive networks are reviewed, which can be broadly categorised by applying directional external forces and employing templates with desired structures. Furthermore, potential applications in different fields for the PCCs with directional thermal conduction are summarised. Finally, knowledge gaps and opportunities for further exploration of the oriented thermally conductive PCCs are discussed.

定向导热相变复合材料（PCC）具有超强的定向导热性，只需相对较少的导热增强剂（TCE），因此对 PCC 能量密度的影响较小，近年来备受关注。鉴于其独特的特性和潜在的应用，本文首次对该领域的最新发展进行了全面综述，内容涵盖各向异性形态、传热特性、制备路线以及它们在各种潜在应用中的适用性。综述系统地比较了分别通过使用一维（1D）、二维（2D）和三维（3D）TCE 实现的取向导热 PCC 的特性。高度取向的一维/二维 TCE 的排列是热传导性能增强的原因，但发现界面上的弱相互作用和相关热阻是限制热传导增强程度的重要障碍。三维 TCE 有可能提供连续的导电网络以及 PCM 形状稳定性。根据 TCE 的不同特性，建立了 PCC 各向异性热导率与关键参数（包括浓度、几何形状（如尺寸、长宽比）和 TCE 排列程度）之间的关系。此外，还综述了构建高取向导热网络的不同制备方法，这些方法大致可分为施加定向外力和采用具有所需结构的模板。此外，还总结了定向导热 PCC 在不同领域的潜在应用。最后，还讨论了进一步探索定向导热 PCC 的知识差距和机遇。

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引用次数: 0

Synthesis and characterization of activated carbon derived from agricultural waste (cocoa pod husks) as potential electrode for symmetric supercapacitor 作为对称超级电容器潜在电极的农业废弃物（可可荚壳）衍生活性炭的合成与表征

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-10-28 DOI: 10.1016/j.mtsust.2024.101028

Oladepo Fasakin , Kabir O. Oyedotun , Abdulmajid A. Mirghni , Ndeye F. Sylla , Badr A. Mahmoud , Ncholu Manyala

Biomass waste of cocoa pod husks is adopted as starting material to synthesize Activated carbon (ACC) using a tube furnace via KOH activation with temperature ranging from 500 °C to 800 °C. The activated carbon prepared at 600 °C (ACC 600 °C) shows improved qualities than the other prepared samples, according to the physico-chemical analyses. A sponge-like morphology, amorphous structure, and microporous and mesoporous carbon are observed in the synthesized material. Trasatti approach is adopted to verify the storage mechanism of the activated carbon material (ACC 600 °C) with the percentage contribution of capacitive and diffusion-controlled effect as 92.4732% and 7.5268% for positive electrode while the negative electrode possesses 75.565% and 24.435% at scan rate of 50 mVs⁻¹. A symmetric device is fabricated from the ACC 600 °C, which gives a maximum specific energy (S.E.) of 19 Wh kg⁻¹ with a corresponding specific power (S.P.) of 453 W kg⁻¹ at a specific current of 0.5 A g⁻¹ in 2.5 M KNO₃ solution. The coulombic efficiency of the device is 99.6% after 10000 cycles with 72% capacitance retention. The obtained results suggest that the activated carbon derived from cocoa pod husks could be used as a promising material for supercapacitor's application.

以可可荚壳生物质废料为起始材料，使用管式炉通过 KOH 活化法合成活性炭（ACC），温度范围为 500 °C 至 800 °C。根据物理化学分析，在 600 °C 下制备的活性炭（ACC 600 °C）比其他制备的样品质量更好。合成材料具有海绵状形貌、无定形结构以及微孔和介孔碳。在 50 mVs-1 的扫描速率下，正极的电容效应和扩散控制效应分别占 92.4732% 和 7.5268%，而负极则分别占 75.565% 和 24.435%。在 2.5 M KNO3 溶液中，当比电流为 0.5 A g-1 时，ACC 600 °C 制成的对称装置的最大比能量（S.E.）为 19 Wh kg-1，相应的比功率（S.P.）为 453 W kg-1。经过 10000 次循环后，该装置的库仑效率为 99.6%，电容保持率为 72%。这些结果表明，从可可荚壳中提取的活性炭可以作为一种很有前途的超级电容器应用材料。

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引用次数: 0

Securing gypsum demand in cement industry by gypsum by-products: Current challenges and prospects 利用石膏副产品确保水泥行业对石膏的需求：当前的挑战和前景

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-10-28 DOI: 10.1016/j.mtsust.2024.101034

Alain Tèebwaoga Sina , Jamal Ait Brahim , Bilal Ben Ali , Brahim Achiou , Nils Haneklaus , Redouane Beniazza

The global demand of gypsum resources is in continuous growth in construction sector. A large share of commercially available gypsum is closed by gypsum by-products including the flue gas desulfurization gypsum (FGDG), generated from thermal power plants. The production of FGDG is expected to be reduced in the upcoming years following the energy transition from fossil to green energy resources. To meet the increasing demand in the cement industry, other gypsum by-products could be introduced in the market including phosphogypsum (PG), produced in large volume in the fertilizer industry. This review emphasizes on the status and market of gypsum resources in the last 20 years, especially the gypsum by-products resources. The performance of these gypsum resources in cement was evaluated, highlighting the influence of impurities, the technical and the economic feasibility of large-scale use of gypsum by-products in cement as a substitute of FGDG and natural gypsum.

全球建筑行业对石膏资源的需求持续增长。市售石膏的很大一部分是由石膏副产品封闭而成，包括热电厂产生的烟气脱硫石膏（FGDG）。随着能源从化石能源向绿色能源过渡，预计未来几年烟气脱硫石膏的产量将会减少。为了满足水泥行业日益增长的需求，市场上可能会出现其他石膏副产品，包括化肥行业大量生产的磷石膏（PG）。本综述强调了过去 20 年中石膏资源的现状和市场，尤其是石膏副产品资源。对这些石膏资源在水泥中的性能进行了评估，强调了杂质的影响，以及在水泥中大规模使用石膏副产品作为烟气脱硫石膏和天然石膏替代品的技术和经济可行性。

引用次数: 0

Structural and enhanced electrochemical performance of Co-free lithium-rich layered manganese-based Li1.2Mn0.6Ni0.2O2 cathodes via Na-doping at Li site for lithium-ion batteries 通过在锂离子电池的锂位点掺杂 Na 实现无钴富锂层状锰基 Li1.2Mn0.6Ni0.2O2 正极的结构和更高的电化学性能

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-10-28 DOI: 10.1016/j.mtsust.2024.101027

Sining Liu , Xin Yan , Pengyu Li , Xinru Tian , Sinan Li , Fei Teng , Shao-hua Luo

Li-rich Co-free Mn-based cathode materials have attracted considerable attention in the development of lithium-ion batteries (LIBs) due to their impressive theoretical capacity and cost-effectiveness. Nevertheless, the inherent shortcomings in cycling stability and rate capability hinder their widespread application. Herein, Na-doped Li_1.2-xNa_xMn_0.6Ni_0.2O₂ (x = 0, 0.01, 0.03, 0.05, 0.08, 0.10) is synthesized using Na₂CO₃ as the source of Na. Density functional theory (DFT) calculations reveal that the presence of Na⁺ introduction enlarges the between-layer spacing of Li_1.2Mn_0.6Ni_0.2O₂, reduces the band gap width, reduces the cation mixing phenomenon, and increases the Li⁺ diffusion rate and electronic conductivity. Experimental electrochemical assessments demonstrate that the cathode material with a Na doping level of 0.03 exhibits remarkable performance: it achieves a discharge specific capacity of 204 mAh·g⁻¹ at 0.1C and retains 87.4% of its capacity after 100 cycles. These findings underscore the efficacy of Na doping in enhancing the electrochemical properties of Li-rich Mn-based cathode materials, thereby advancing their potential for practical application in LIBs.

富锂无钴锰基正极材料因其出色的理论容量和成本效益而在锂离子电池（LIB）的开发中备受关注。然而，循环稳定性和速率能力方面的固有缺陷阻碍了它们的广泛应用。本文以 Na2CO3 为 Na 源，合成了掺杂 Na 的 Li1.2-xNaxMn0.6Ni0.2O2（x = 0、0.01、0.03、0.05、0.08、0.10）。密度泛函理论（DFT）计算显示，Na+ 的引入扩大了 Li1.2Mn0.6Ni0.2O2 的层间间隔，减小了带隙宽度，减少了阳离子混合现象，并提高了 Li+ 的扩散速率和电子电导率。实验电化学评估表明，Na 掺杂水平为 0.03 的阴极材料表现出卓越的性能：它在 0.1C 时的放电比容量达到 204 mAh-g-1，并在 100 次循环后保持了 87.4% 的容量。这些发现强调了掺杂 Na 能有效增强富锂锰基阴极材料的电化学性能，从而提高了它们在锂电子电池中的实际应用潜力。

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引用次数: 0

Potential microbes in bioremediation: A review 生物修复中的潜在微生物：综述

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-10-28 DOI: 10.1016/j.mtsust.2024.101032

Kuheli Bhowmick , Debasree Roy , Dipak Rana , Adrija Ghosh , Sourav Sadhukhan , Mukut Chakraborty , Dipankar Chattopadhyay , Tapas Kumar Ghosh

Over the past few decades, the soaring environmental pollution due to hastened industrialization and pernicious agricultural processes has become a substantial obstacle. The existence of detrimental contaminants like nuclear wastes, heavy metals, pesticides, hydrocarbons, oils, and dyes has been withering the environment and human health. In this context, microbial bioremediation has established itself as the most comprehensive biotechnological process for environmental restoration. The application of microbial communities in bioremediation is gaining momentum as an astounding, environmentally sound, and economically efficient means to mitigate the harmful effects of toxic pollutants. Microorganisms serve as invaluable resources for environmental restoration and remediation of polluted soil, showcasing their presence across a wide range of environmental conditions. Precisely microorganisms are distributed all over the biosphere due to their diverse metabolic activity and can easily grow in a wide range of environmental conditions which in an environment often create a variety of enzymes that can eliminate hazardous contaminants by using them as a substrate for growth. To enhance the metabolic potential of microbes, currently, different methods and strategies like biostimulation, bioaugmentation, bioventing, etc. are applied. The present review focuses on microbial diversity in bioremediation, different techniques applied, and the bioremediation of different environmental pollutants. It additionally attempted to highlight the monitoring of the bioremediation processes and their sustainability.

在过去的几十年里，由于工业化进程加快和有害的农业生产过程，环境污染日益严重，这已成为一个巨大的障碍。核废料、重金属、杀虫剂、碳氢化合物、油类和染料等有害污染物的存在使环境和人类健康日益恶化。在这种情况下，微生物生物修复技术已成为最全面的环境修复生物技术。微生物群落在生物修复中的应用正日益成为一种令人震惊的、对环境无害的、经济高效的减轻有毒污染物有害影响的手段。微生物是修复环境和治理污染土壤的宝贵资源，在各种环境条件下都能发挥作用。准确地说，微生物分布在生物圈的各个角落，具有多种多样的新陈代谢活动，可以在各种环境条件下轻松生长。为了提高微生物的代谢潜力，目前采用了生物刺激、生物增殖、生物通风等不同的方法和策略。本综述侧重于生物修复中的微生物多样性、应用的不同技术以及不同环境污染物的生物修复。此外，还试图强调生物修复过程的监测及其可持续性。

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引用次数: 0

TiO2/C/Cu hybrids by in-situ carbon reduction for a green photocatalytic agent 通过原位碳还原法将 TiO2/C/Cu 混合物转化为绿色光催化剂

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-10-28 DOI: 10.1016/j.mtsust.2024.101033

Guilu Qin , Yifan Liu , Ruhumuriza Jonathan , Baoshan Wu , Xian Jian

TiO₂ semiconductor has the disadvantages of energy bandwidth, low photo-quantum efficiency, and electron-hole pair easy recombination, which makes TiO₂ semiconductor photocatalytic materials cannot be widely used efficiently. Here, a simple and low-cost method is used to prepare TiO₂/C/Cu hybrid by in-situ carbon reduction by chemical vapor deposition. During high-temperature calcination, an amorphous carbon is formed on the surface of anatase TiO₂, and CuO is reduced by in-situ carbon to obtain Cu. Partial Cu-doping into TiO₂ introduces defects, and in-situ Cu and C loads act as electron traps to reduce photogenerated electron/hole recombination. Compared with the original TiO₂, the TiO₂/C/Cu hybrids have a narrow band gap (2.77 eV) and abundant defect active sites and have excellent photocatalytic activity to improve the degradation of formaldehyde (HCHO) and methyl orange (MO) under visible light. In addition, after 4 cycles, the degradation of HCHO and MO still maintained excellent stability. This innovation has many potential applications in the future, including air purification and industry.

TiO2半导体具有能带宽、光量子效率低、电子-空穴对易重组等缺点，这使得TiO2半导体光催化材料不能得到有效的广泛应用。本文采用一种简单、低成本的方法，通过化学气相沉积原位碳还原法制备了TiO2/C/Cu杂化物。在高温煅烧过程中，锐钛型二氧化钛表面形成无定形碳，原位碳还原 CuO 得到 Cu。在二氧化钛中掺入部分铜会带来缺陷，而原位铜和碳负载则会成为电子陷阱，从而减少光生电子/空穴重组。与原始 TiO2 相比，TiO2/C/Cu 杂化物具有较窄的带隙（2.77 eV）和丰富的缺陷活性位点，具有优异的光催化活性，可改善可见光下甲醛（HCHO）和甲基橙（MO）的降解。此外，经过 4 次循环后，HCHO 和 MO 的降解仍然保持极佳的稳定性。这项创新在未来的空气净化和工业等领域有许多潜在的应用前景。

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引用次数: 0

Evaluating the energy and economic performance of hybrid photovoltaic thermal system integrated with multiwalled carbon nanotubes enhanced phase change material 评估集成了多壁碳纳米管增强型相变材料的混合光伏热系统的能源和经济性能

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-10-28 DOI: 10.1016/j.mtsust.2024.101035

Reji Kumar Rajamony , A.K. Pandey , A.G.N. Sofiah , Johnny Koh Siaw Paw , Govindasami Periyasami , K. Chopra , Subramaniyan Chinnasamy , Rizwan A. Farade

Photovoltaic thermal (PVT) systems represent an advanced evolution of traditional photovoltaic (PV) modules designed to generate electrical and thermal energy simultaneously. However, achieving optimal and commercially viable performance from these systems remains challenging. To overcome this issue, in this research, multiwalled carbon nanotube (MWCNT) enhanced phase change materials (PCMs) integrated with PVT system to enhance electrical and thermal performance has been studied. An experimental investigation with three different configurations, PVT, PCM integrated PVT (PVT_PCM), and MWCNT enhanced PCM integrated PVT (PVT_NePCM) systems, was carried out under varying solar radiations and a water flow rate of 0.013–0.016 kg/s compared to conventional PV system. A two-step technique was employed to formulate the nanocomposites, and the energy performance of both PV and PVT systems assessed experimentally. The performance of PVT_PCM and PVT_NePCM systems was evaluated using the TRNSYS simulation technique. The formulated nanocomposite exhibited a 71.43% enhancement in thermal conductivity, a significant reduction in transmittance up to 92% and remained chemically and thermally stable. Integration of NePCM in the PVT system resulted in a notable decrease in panel temperature and a 25.03% increase in electrical efficiency compared to the conventional PV system. The highest performance ratio and overall efficiency for PVT_NePCM were 0.55 and 81.62%, respectively, at a flow rate of 0.013 kg/s. The energy payback periods of PVT_NePCM, PVT_PCM, and PVT setup were 4.7, 4.8 and 5.6 years, respectively. Additionally, a significant improvement in thermal efficiency were observed for PVT_PCM and PVT_NePCM systems compared to water-based PVT systems, due to the energy stored in the thermal energy storage material.

光伏热能（PVT）系统是传统光伏（PV）模块的先进演进，旨在同时产生电能和热能。然而，要从这些系统中获得最佳和商业上可行的性能仍然具有挑战性。为了克服这一问题，本研究将多壁碳纳米管（MWCNT）增强型相变材料（PCMs）与 PVT 系统集成，以提高其电热性能。与传统光伏系统相比，在不同的太阳辐射和 0.013-0.016 公斤/秒的水流量条件下，对 PVT、PCM 集成 PVT（PVTPCM）和 MWCNT 增强型 PCM 集成 PVT（PVTNePCM）系统这三种不同配置进行了实验研究。采用两步法配制纳米复合材料，并通过实验评估了 PV 和 PVT 系统的能源性能。使用 TRNSYS 仿真技术评估了 PVTPCM 和 PVTNePCM 系统的性能。配制的纳米复合材料的热导率提高了 71.43%，透射率显著降低了 92%，并保持了化学和热稳定性。与传统光伏系统相比，将 NePCM 集成到 PVT 系统后，面板温度明显降低，电气效率提高了 25.03%。在流量为 0.013 公斤/秒时，PVTNePCM 的最高性能比和总效率分别为 0.55 和 81.62%。PVTNePCM、PVTPCM 和 PVT 设置的能源回收期分别为 4.7 年、4.8 年和 5.6 年。此外，与水基 PVT 系统相比，PVTPCM 和 PVTNePCM 系统的热效率明显提高，这是因为热能储存材料中储存了能量。

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引用次数: 0

Enhancing efficiency through surface passivation of carbon-based perovskite solar cells 通过碳基过氧化物太阳能电池的表面钝化提高效率

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-10-28 DOI: 10.1016/j.mtsust.2024.101022

Eman A. Alghamdi , Ibtisam S. Almalki 1 , Refka Sai , Masfer H. Alkahtani , Ghazal S. Yafi , Yahya A. Alzahrani , Sultan M. Alenzi , Abdulaziz Aljuwayr , Abdurhman Aldukhail l , Khalid E. Alzahrani , Fatimah S. Alfaifi , Hayat S. Althobaiti , Wadha Khalaf Alenazi , Anwar Q. Alanazi , Masaud Almalki

Perovskite solar cells (PSCs) have made significant strides in power conversion efficiency (PCE), but their commercialization remains limited by stability issues. Additionally, the high cost of electrodes like gold necessitates the exploration of more affordable alternatives such as carbon (graphene). In this study, we present an approach that combines material dimensionality control and interfacial passivation using post-device treatment with phenethylammonium iodide (PEAI), an organic halide salt, to enhance the efficiency of carbon-based PSCs. Effective defect passivation is key to further improving the PCE and open-circuit voltage (V_OC) of PSCs. Our results show that PEAI successfully passivates defects on the perovskite surface, significantly reducing non-radiative recombination. As a result, we achieved carbon-based PSCs with an impressive efficiency of 19.3%, demonstrating excellent stability under maximum power point tracking (MPPT) for over 900 h.

过氧化物太阳能电池（PSC）在功率转换效率（PCE）方面取得了长足进步，但其商业化仍受到稳定性问题的限制。此外，金等电极成本高昂，因此有必要探索碳（石墨烯）等更经济实惠的替代品。在本研究中，我们提出了一种结合材料尺寸控制和界面钝化的方法，即使用有机卤化物盐苯乙基碘化铵（PEAI）进行器件后处理，以提高碳基 PSC 的效率。有效的缺陷钝化是进一步提高 PSC 的 PCE 和开路电压 (VOC) 的关键。我们的研究结果表明，PEAI 成功地钝化了过氧化物表面的缺陷，大大减少了非辐射重组。因此，我们实现了效率高达 19.3% 的碳基 PSCs，并在最大功率点跟踪 (MPPT) 下显示出超过 900 小时的出色稳定性。

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引用次数: 0

Synergistic visible-light photocatalytic degradation of amoxicillin and ciprofloxacin using Ag/AgO-integrated 2D/2D g-C3N4/Ni3V2O8 S-scheme heterostructure 利用银/氧化银集成二维/二维 g-C3N4/Ni3V2O8 S 型异质结构在可见光下协同光催化降解阿莫西林和环丙沙星

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-10-26 DOI: 10.1016/j.mtsust.2024.101017

Akhila Amasegowda , Sneha Yadav , Ragesh Nath R , Udaya Kumar A. H , Sneha Narayan Kulkarni , Harikaranahalli Puttaiah Shivaraju , N.K. Lokanath

Employing a Step-scheme (S-scheme) configuration combined with a cocatalyst offers an effective approach to boost the photocatalytic efficiency of nano-heterostructures. In this study, Ag/AgO nanoparticles were integrated into a 2D/2D heterojunction (g-C₃N₄/Ni₃V₂O₈) for the photocatalytic degradation of amoxicillin and ciprofloxacin under visible light exposure. Various comprehensive investigative techniques were utilized to verify the composition, formation, and band structure of the g-C₃N₄/Ni₃V₂O₈–Ag/AgO heterostructure. The embedded Ag/AgO nanoparticles play a dual role: capturing carriers of charge and encouraging electron-hole separation, thus creating a heterojunction of the p-n S-scheme that improves the electrons and holes redox potential for surface reactions. The 2D/2D morphology enables substantial interfacial contact, while Ag/AgO nanoparticles act as cocatalysts, improving electron extraction, affecting product selectivity, and boosting catalytic activity. The optimized g-C₃N₄/Ni₃V₂O₈–Ag/AgO composite exhibits significant photocatalytic degradation of ciprofloxacin (CIP) and amoxicillin (AMX) under the influence of visible light, reaching elimination rates of 58.8% and 62.1% within 270 min, respectively. Additionally, •O₂⁻ and h⁺ are the primary active species, with •O₂⁻ leading the photocatalytic elimination of CIP and AMX. This study highlights a potential strategy to developing photocatalysts with a high elimination efficiency of antibiotics by harnessing the enhanced reducing and oxidizing capabilities of S-scheme heterojunctions through meticulous structural configuration.

将阶梯型结构（S-scheme）与共催化剂相结合，是提高纳米异质结构光催化效率的有效方法。在这项研究中，Ag/AgO 纳米粒子被集成到了 2D/2D 异质结（g-C3N4/Ni3V2O8）中，用于在可见光照射下光催化降解阿莫西林和环丙沙星。利用各种综合研究技术验证了 g-C3N4/Ni3V2O8-Ag/AgO 异质结构的组成、形成和能带结构。嵌入的 Ag/AgO 纳米粒子具有双重作用：捕获电荷载流子和促进电子-空穴分离，从而形成 p-n S 型异质结，提高电子和空穴的氧化还原电位，促进表面反应。2D/2D 形貌可实现大量的界面接触，而 Ag/AgO 纳米粒子则可作为协同催化剂，改善电子萃取，影响产物选择性，并提高催化活性。优化后的 g-C3N4/Ni3V2O8-Ag/AgO 复合材料在可见光的作用下，对环丙沙星（CIP）和阿莫西林（AMX）的光催化降解效果显著，在 270 分钟内消除率分别达到 58.8% 和 62.1%。此外，-O2- 和 h⁺ 是主要的活性物种，其中 -O2- 是光催化消除 CIP 和 AMX 的主要活性物种。这项研究强调了一种潜在的策略，即通过精心的结构配置，利用 S 型异质结增强的还原和氧化能力，开发出具有高抗生素消除效率的光催化剂。

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引用次数: 0

A review of NH3-SCR using nitrogen-doped carbon catalysts for NOx emission control 使用掺氮碳催化剂控制氮氧化物排放的 NH3-SCR 研究综述

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-10-22 DOI: 10.1016/j.mtsust.2024.101016

Sahar Elkaee , Lalehvash Moghaddam , Behnaz Alinaghipour

This review evaluates the application of nitrogen-doped carbon (NDC) catalysts for mitigating nitrogen oxides (NO_x) emissions through selective catalytic reduction (SCR) using ammonia (NH₃). A key focus is exploring how the unique nitrogen functionalities of NDCs, such as pyridinic and graphitic nitrogen, enhance catalytic performance compared to traditional catalysts, providing deeper insight into their electronic structure and adsorption properties. This review emphasizes the advantages of NDC catalysts in stabilizing SCR reactions under demanding conditions and highlights recent advancements, such as improved synthesis techniques and the incorporation of transition metals to increase activity. Additionally, the review highlights breakthroughs in SCR technology, including the synergistic effects of metal incorporation into NDC structures and innovations in overcoming catalyst deactivation. Fundamental mechanisms of NO_x reduction are discussed, with an emphasis on the standard and fast SCR pathways and the interplay of Langmuir-Hinshelwood (L-H) and Eley-Rideal (E-R) mechanisms. The impact of synthesis methodologies, including templating and pyrolysis, on catalyst properties is also analyzed. Key performance factors, such as temperature and reactant concentrations, are examined, alongside strategies to enhance SCR performance by incorporating transition metals and ceria. Challenges like catalyst deactivation and stability are addressed, with potential solutions proposed. Finally, challenges like catalyst deactivation and stability are addressed, with proposed solutions, and future trends in NDC catalyst development to meet evolving emission regulations are outlined.

本综述评估了掺氮碳 (NDC) 催化剂在通过使用氨 (NH3) 进行选择性催化还原 (SCR) 以减少氮氧化物 (NOx) 排放方面的应用。重点是探索 NDC 独特的氮功能（如吡啶氮和石墨氮）与传统催化剂相比如何提高催化性能，从而更深入地了解其电子结构和吸附特性。本综述强调了 NDC 催化剂在苛刻条件下稳定 SCR 反应的优势，并重点介绍了最近的进展，如改进合成技术和加入过渡金属以提高活性。此外，综述还重点介绍了 SCR 技术的突破性进展，包括将金属掺入 NDC 结构的协同效应以及克服催化剂失活的创新技术。讨论了氮氧化物还原的基本机制，重点是标准和快速 SCR 途径以及 Langmuir-Hinshelwood (L-H) 和 Eley-Rideal (E-R) 机制的相互作用。此外，还分析了模板化和热解等合成方法对催化剂性能的影响。此外，还研究了温度和反应物浓度等关键性能因素，以及通过加入过渡金属和铈来提高 SCR 性能的策略。此外，还探讨了催化剂失活和稳定性等难题，并提出了潜在的解决方案。最后，针对催化剂失活和稳定性等挑战提出了解决方案，并概述了 NDC 催化剂开发的未来趋势，以满足不断变化的排放法规要求。

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