Advanced Powder Materials最新文献_第9页

MA-activated lattice shrinkage and bandgap renormalization advancing the stability of FA1-xMAxPbI3 (x=0–1) perovskites photovoltaic ma激活的晶格收缩和带隙重整化提高了FA1-xMAxPbI3 （x= 0-1）钙钛矿光伏的稳定性

Advanced Powder Materials

Pub Date : 2025-02-01 DOI: 10.1016/j.apmate.2024.100264

Congtan Zhu , Xueyi Guo , Si Xiao , Weihuang Lin , Zhaozhe Chen , Lin Zhang , Hui Zhang , Xiangming Xiong , Ying Yang

Generally, referring to the stability of perovskite, the most studied perovskite material has been MA-free mixed-cation perovskite. The precise role of MA in the light-thermal-humid stability of perovskite solar cells still lacks of a systematically understanding. In this work, the evolution of crystallographic structures, intermediate phase, ultrafast dynamics, and thermal decomposition behavior of MA-mixed perovskite FA_1-xMA_xPbI₃ (x=0–100%) are investigated. The influence of MA on the stability of devices under heat, light, and humidity exposure are revealed. In the investigated compositional space (x=0–100%), device efficiencies vary from 19.5% to 22.8%, and the light, thermal, and humidity exposure stability of the related devices are obviously improved for FA_1-xMA_xPbI₃ (x=20%–30%). Incorporation 20%–30% of MA cations lowers nucleation barrier and causes a significant volume shrinkage, which enhances the interaction between FA and I, thus improving crystallization and stability of the FA_1-xMA_xPbI₃. Thermal behavior analysis reveals that the decomposition temperature of FA_0.8MA_0.2PbI₃ reaches 247 °C (FAPbI₃, 233 °C) and trace amounts of MA cations enhance the thermal stability of the perovskite. Remarkably, we observe lattice shrinkage using spherical aberration corrected transmission electron microscope (AC-TEM). This work implies that stabilizing perovskites will be realized by incorporating trace amounts of MA, which improve the crystallization and carrier transport, leading to improved stability and performances.

一般来说，关于钙钛矿的稳定性，研究最多的钙钛矿材料是不含ma的混合阳离子钙钛矿。MA在钙钛矿太阳能电池光-热-湿稳定性中的确切作用还缺乏系统的认识。本文研究了ma混合钙钛矿FA1-xMAxPbI3 （x= 0-100%）的晶体结构、中间相、超快动力学和热分解行为的演变。揭示了MA对器件在热、光、湿暴露下稳定性的影响。在所研究的组成空间（x= 0-100%）中，FA1-xMAxPbI3 （x= 20%-30%）的器件效率变化在19.5% ~ 22.8%之间，相关器件的光、热、湿暴露稳定性明显提高。在FA1-xMAxPbI3中掺入20%-30%的MA阳离子降低了成核屏障，导致了明显的体积收缩，增强了FA与I的相互作用，从而提高了FA1-xMAxPbI3的结晶性和稳定性。热行为分析表明，FA0.8MA0.2PbI3的分解温度达到247℃（FAPbI3为233℃），微量的MA阳离子增强了钙钛矿的热稳定性。值得注意的是，我们使用球面像差校正透射电子显微镜（AC-TEM）观察到晶格收缩。这项工作表明，通过加入微量的MA来稳定钙钛矿，可以改善钙钛矿的结晶和载流子的输运，从而提高钙钛矿的稳定性和性能。

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引用次数: 0

Frustrated lewis pairs regulated solid polymer electrolyte enables ultralong cycles of lithium metal batteries 受挫刘易斯对调节固体聚合物电解质使锂金属电池的超长循环

Advanced Powder Materials

Pub Date : 2025-02-01 DOI: 10.1016/j.apmate.2024.100263

Pingping Chang , Zhenjie Liu , Murong Xi , Yong Guo , Tianlong Wu , Juan Ding , Hongtao Liu , Yudai Huang

Long-cycling dendrite-free solid-state lithium metal batteries (LMBs) require fast and uniform lithium-ion (Li⁺) transport of solid-state electrolytes (SSEs). However, the SSEs still face the problems of low ionic conductivity, low Li⁺ transference number, and unstable interface with lithium metal. In this work, a novel strategy of frustrated Lewis pairs (FLPs) modulating solid polymer electrolytes (SPEs) has been firstly proposed that enables durable Li reversible cycling. The tunable strength of Lewis acid and base dual-active sites of nickel borate FLPs can synergistically promote both the dissociation of lithium salts and the transfer of Li⁺. As a consequence, the FLPs modulated SPEs (SPE-NiBO-150) exhibit high ionic conductivity of 4.92×10⁻⁴ S cm⁻¹, high Li⁺ transference number of 0.74, and superior interface compatibility with both lithium anode and LiFePO₄ cathode at room-temperature. The Li//SPE-NiBO-150//Li symmetric cell demonstrates ultralong cycle stability (over 10,000 h (417 days) at both current density of 0.2 and 0.5 mA cm⁻²), and the assembled solid-state LiFePO₄//SPE-NiBO-150//Li battery also shows excellent performance (86% capacity retention for 300 cycles at 0.5C). The present work supplies a new insight into designing high-performance SPEs for solid-state LMB applications.

长循环无枝晶固态锂金属电池（lmb）需要快速均匀的锂离子（Li+）传输固态电解质（sse）。然而，sse仍然面临离子电导率低、Li+转移数低、与锂金属界面不稳定等问题。在这项工作中，首次提出了一种挫折路易斯对（FLPs）调制固体聚合物电解质（spe）的新策略，该策略可以实现持久的锂可逆循环。硼酸镍FLPs的Lewis酸碱双活性位点强度可调，可协同促进锂盐的解离和Li+的转移。结果表明，FLPs调制的spe （SPE-NiBO-150）在室温下具有4.92×10−4 S cm−1的高离子电导率，0.74的高Li+转移数，以及与锂阳极和LiFePO4阴极良好的界面相容性。Li//SPE-NiBO-150//Li对称电池表现出超长循环稳定性（在0.2和0.5 mA cm - 2电流密度下均超过10,000小时（417天）），并且组装的固态LiFePO4//SPE-NiBO-150//Li电池也表现出优异的性能（在0.5 c下300次循环时容量保持86%）。本工作为设计固态LMB应用的高性能spe提供了新的见解。

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引用次数: 0

Multicolor chiral perovskite nanowire films with strong and tailorable circularly polarized luminescence 多色手性钙钛矿纳米线薄膜，具有强而可定制的圆偏振发光

Advanced Powder Materials

Pub Date : 2025-02-01 DOI: 10.1016/j.apmate.2024.100262

Fang Peng , Dan Liang , En Yang , Bongjun Yeom , Yuan Zhao , Wei Ma

Perovskites showcased potential promise for innovative circularly polarized luminescence (CPL)-active multichannel information encryption, owing to the exceptional luminescence brightness. It was still a formidable challenge to fabricate CPL-active perovskites with significant luminescent asymmetry factor (g_lum) and full-colour-tailorable CPL properties. Indeed, compared to isotropic perovskites, anisotropic perovskite nanowires (NWs) were conducive to carrier separation and transport for polarization enhancement. Herein, three types of CsPb(Br/I)₃ NWs with green, orange, red fluorescence (FL) were respectively synthesized and assembled into chiral NW films. The right-handed/left-handed chiral NW films constructed by 4+4 layers and 45° inter-angles exhibits highly symmetric and mirror-like chiral signals. The strongest chiral intensity is more than 3000 medg. CPL signals with wide colour gamut produce ranging from 480 nm to 800 nm, and tailorable CPL wavelengths are manipulated by the emission wavelength of perovskite NWs. A giant CPL signal with a maximum g_lum of up to 10⁻¹ is achieved. The polarization imaging of chiral NW films produces brilliant differential circularly polarized structural colours, making it more widely used in multilevel anti-counterfeiting systems. A significant breakthrough lies in the development of advanced chiral perovskite materials with remarkable g_lum and tailorable CPL properties, which sheds new light on optical anti-counterfeiting and intelligent information encryption.

钙钛矿显示了创新圆极化发光(CPL)-主动多通道信息加密的潜在前景，由于其特殊的发光亮度。制备具有明显发光不对称因子（glum）和可定制全彩色CPL性能的CPL活性钙钛矿仍然是一个巨大的挑战。事实上，与各向同性钙钛矿相比，各向异性钙钛矿纳米线有利于载流子的分离和输运，从而增强极化。本文分别合成了三种具有绿色、橙色、红色荧光（FL）的CsPb(Br/I)3 NWs，并将其组装成手性NW膜。由4+4层和45°夹角构成的右手/左手手性NW膜表现出高度对称的镜状手性信号。最强手性强度在3000 medg以上。可产生480 ~ 800 nm宽色域的CPL信号，可根据钙钛矿NWs的发射波长来调整CPL波长。一个巨大的CPL信号，最大负压高达10−1。手性NW薄膜的偏振成像可产生绚丽的差圆偏振结构色，使其在多级防伪系统中得到更广泛的应用。一项重大突破在于开发出具有卓越胶性和可定制CPL性能的先进手性钙钛矿材料，为光学防伪和智能信息加密提供了新的思路。

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引用次数: 0

Coupling Enteromorpha prolifera-derived N-doped biochar with Cu-Mo2C clusters for selective CO2 hydrogenation to CO 耦合浒苔衍生n掺杂生物炭与Cu-Mo2C簇选择性CO2加氢成CO

Advanced Powder Materials

Pub Date : 2025-02-01 DOI: 10.1016/j.apmate.2024.100259

Xueyuan Pan , Caikang Wang , Bei Li , Mingzhe Ma , Hao Sun , Guowu Zhan , Kui Wang , Mengmeng Fan , Linfei Ding , Gengtao Fu , Kang Sun , Jianchun Jiang

CO₂ conversion to CO via the reverse water-gas shift (RWGS) reaction is limited by a low CO₂ conversion rate and CO selectivity. Herein, an efficient RWGS catalyst is constructed through Enteromorpha prolifera–derived N-rich mesoporous biochar (EPBC) supported atomic-level Cu-Mo₂C clusters (Cu-Mo₂C/EPBC). Unlike traditional activated carbon (AC) supported Cu-Mo₂C particles (Cu-Mo₂C/AC), the Cu-Mo₂C/EPBC not only presents the better graphitization degree and larger specific surface area, but also uniformly and firmly anchors atomic-level Cu-Mo₂C clusters due to the existence of pyridine nitrogen. Furthermore, the pyridine N of Cu-Mo₂C/EPBC strengthens an unblocked electron transfer between Mo₂C and Cu clusters, as verified by X-ray absorption spectroscopy. As a result, the synergistic effect between pyridinic N anchoring and the clusters interaction in Cu-Mo₂C/EPBC facilitates an improved CO selectivity of 99.95% at 500 °C compared with traditional Cu-Mo₂C/AC (99.60%), as well as about 3-fold CO₂ conversion rate. Density functional theory calculations confirm that pyridine N-modified carbon activates the local electronic redistribution at Cu-Mo₂C clusters, which contributes to the decreased energy barrier of the transition state of CO∗+O∗+2H∗, thereby triggering the transformation of rate-limited step during the redox pathway. This biomass-derived strategy opens perspective on producing sustainable fuels and building blocks through the RWGS reaction.

通过逆向水气转换（RWGS）反应将CO2转化为CO受到CO2转化率低和CO选择性低的限制。本文通过浒苔衍生的富n介孔生物炭（EPBC）支持原子级Cu-Mo2C簇（Cu-Mo2C/EPBC）构建了高效的RWGS催化剂。与传统活性炭（AC）负载的Cu-Mo2C颗粒（Cu-Mo2C/AC）不同，Cu-Mo2C/EPBC不仅具有更好的石墨化程度和更大的比表面积，而且由于吡啶氮的存在，Cu-Mo2C/EPBC可以均匀而牢固地锚定原子级Cu-Mo2C簇。此外，x射线吸收光谱证实，Cu-Mo2C/EPBC的吡啶N增强了Mo2C和Cu团簇之间的不受阻电子转移。结果表明，在Cu-Mo2C/EPBC中，吡啶N锚定与簇间相互作用的协同作用使得CO在500℃下的选择性比传统的Cu-Mo2C/AC（99.60%）提高了99.95%，CO2转化率提高了约3倍。密度泛函理论计算证实，吡啶n修饰碳激活Cu-Mo2C簇的局部电子重分布，导致CO∗+O∗+2H∗过渡态的能垒降低，从而触发氧化还原途径中速率限制步骤的转变。这种生物质衍生战略为通过RWGS反应生产可持续燃料和构建模块开辟了前景。

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引用次数: 0

Rapid synthesis of carbon quantum dot-integrated metal–organic framework nanosheets via electron beam irradiation for selective 5-hydroxymethylfurfural electrooxidation 电子束辐照快速合成碳量子点集成金属-有机骨架纳米片选择性5-羟甲基糠醛电氧化

Advanced Powder Materials

Pub Date : 2025-01-28 DOI: 10.1016/j.apmate.2025.100267

Qianjia Ni , Mingwan Zhang , Bijun Tang , Weidong Hou , Kang Wang , Huazhang Guo , Jiye Zhang , Tao Han , Minghong Wu , Liang Wang

Balancing the adsorption of OH⁻ and 5-hydroxymethylfurfural (HMF) is crucial in optimizing the competing HMF oxidation reaction and oxygen evolution reaction, especially given the polymerization tendency of HMF in alkaline solutions. Herein, we present an innovative approach for rapidly synthesizing a NiFe bimetallic metal-organic framework (MOF) induced by electron-withdrawing carbon quantum dot (EW-CQD) via electron beam irradiation within 2 min. EW-CQD serve as structural regulators, expanding the NiFe-MOF interlayer spacing, increasing reactive site availability, and more effectively balancing the adsorption of OH⁻ and HMF, thereby significantly boosting the oxidation activity of HMF. The resulting EW-CQD-MOF exhibits a low potential of 1.36 V vs. RHE at 10 mA cm⁻² and maintains excellent durability over 120 h. Comprehensive in situ characterization elucidates the HMF oxidation reaction pathway, showing high selectivity towards 2,5-furandicarboxylic acid (FDCA) under ambient conditions, with an impressive HMF conversion rate of 94% and FDCA selectivity of 96% within 6 h. These findings underscore the critical role of structural optimization and adsorption balance in catalytic performance enhancement and offer valuable insights for designing high-efficiency catalysts, advancing sustainable catalytic processes.

平衡OH -和5-羟甲基糠醛（HMF）的吸附对于优化HMF氧化反应和析氧反应是至关重要的，特别是考虑到HMF在碱性溶液中的聚合倾向。本文提出了一种利用电子束辐照在2 min内快速合成吸电子碳量子点（EW-CQD）诱导的NiFe双金属金属有机骨架（MOF）的创新方法。EW-CQD作为结构调节剂，扩大了nfe - mof层间距，增加了活性位点的可用性，更有效地平衡了OH -和HMF的吸附，从而显著提高了HMF的氧化活性。所得到的EW-CQD-MOF在10 mA cm⁻2时表现出1.36 V的低电位，并在120小时内保持良好的耐久性。全面的原位表征阐明了HMF氧化反应途径，在环境条件下对2,5-呋喃二羧酸（FDCA）具有很高的选择性，在6 h内HMF的转化率为94%，FDCA的选择性为96%。这些发现强调了结构优化和吸附平衡在提高催化性能中的重要作用，并为设计高效催化剂、推进可持续催化过程提供了有价值的见解。

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引用次数: 0

Structure-tailored superlattice Bi7Ti4NbO21: Coupling octahedral tilting and rotation induced high ferroelectric polarization for efficient piezo-photocatalytic CO2 reduction 结构定制超晶格Bi7Ti4NbO21：耦合八面体倾斜和旋转诱导高铁电极化用于高效压电光催化CO2还原

Advanced Powder Materials

Pub Date : 2025-01-10 DOI: 10.1016/j.apmate.2025.100265

Jingren Ni , Rufang Zhao , Chendi Shi , Yuanyuan Ji , Aize Hao , Aiting Xie , Hongjian Yu , Siew Kheng Boong , Hiang Kwee Lee , Chuanqiang Zhou , Jie Han

Intergrowth ferroelectric semiconductors with excellent spontaneous polarization field are highly promising piezo-photocatalytic candidate materials. In addition, developing structural design and revealing polarization enhancement in-depth mechanism are top priorities. Herein, we introduce the intergrowth ferroelectrics Bi₇Ti₄NbO₂₁ thin-layer nanosheets for piezo-photocatalytic CO₂ reduction. Density functional theory (DFT) calculations indicate that interlayer lattice mismatch leads to increased tilting and rotation angle of Ti/NbO₆ octahedra on perovskite-like layers, serving as the main reason for increased polarization. Furthermore, the tilting and rotation angle of the interlayer octahedron further increase under stress, suggesting a stronger driving force generated to facilitate charge carrier separation efficiency. Meanwhile, Bi₇Ti₄NbO₂₁ nanosheets provide abundant active sites to effectively adsorb CO₂ and acquire sensitive stress response, thereby presenting synergistically advanced piezo-photocatalytic CO₂ reduction activity with a high CO generation rate of 426.97 μmol g⁻¹ h⁻¹. Our work offers new perspectives and directions for initiating and investigating the mechanisms of high-performance intergrowth piezo-photocatalysts.

互生铁电半导体具有良好的自发极化场，是极具发展前景的压电光催化候选材料。此外，发展结构设计，揭示极化增强的深层机制是当务之急。在此，我们介绍了用于压电光催化CO2还原的互生长铁电体Bi7Ti4NbO21薄层纳米片。密度泛函理论（DFT）计算表明，层间晶格失配导致Ti/NbO6八面体在类钙钛矿层上的倾斜和旋转角度增加，是导致极化增加的主要原因。此外，层间八面体的倾斜角度和旋转角度在应力作用下进一步增大，表明产生了更强的驱动力来促进载流子分离效率。同时，Bi7Ti4NbO21纳米片提供了丰富的活性位点，可以有效吸附CO2并获得敏感的胁迫响应，从而呈现出协同增效的压电光催化CO2还原活性，CO生成速率高达426.97 μmol g−1 h−1。本研究为高性能互生长压电光催化剂的制备和机理研究提供了新的视角和方向。

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引用次数: 0

High temperature molten salts mediated deep regeneration and recrystallization of ternary nickle-rich cathodes 高温熔盐介导三元富镍阴极的深度再生和再结晶

Advanced Powder Materials

Pub Date : 2025-01-10 DOI: 10.1016/j.apmate.2025.100266

Peng Yuan , Tao Zhang , Zuoyu Qin , Yuanhang Gao , Xiang Long , Zuosu Qin , Ning Zhang , Chuankun Jia , Gen Chen

Within the framework of carbon neutrality, lithium-ion batteries (LIBs) are progressively booming along with the growing utilization of green and clean energy. However, the extensive application of LIBs with limited lifespan has brought about a significant recycling dilemma. The traditional hydrometallurgical or pyrometallurgical strategies are not capable to maximize the output value of spent LIBs and minimize the potential environmental hazards. Herein, to alternate the tedious and polluting treatment processes, we propose a high-temperature molten-salt strategy to directly regenerate spent cathodes of LIBs, which can also overcome the barrier of the incomplete defects' restoration with previous low-temperature molten salts. The high-energy and stable medium environment ensures a more thorough and efficient relithiation reaction, and simultaneously provides sufficient driving force for atomic rearrangement and grains secondary growth. In consequence, the regenerated ternary cathode (R-NCM) exhibits significantly enhanced structural stability that effectively suppresses the occurrence of cracks and harmful side reactions. The R-NCM delivers excellent cycling stability, retaining 81.2% of its capacity after 200 cycles at 1 C. This technique further optimizes the traditional eutectic molten-salt approach, broadening its applicability and improving regenerated cathode performance across a wider range of conditions.

在碳中和的框架下，随着绿色清洁能源的日益普及，锂离子电池正逐步蓬勃发展。然而，有限寿命的锂电池的广泛应用带来了重大的回收困境。传统的湿法冶金或火法冶金策略无法最大限度地提高废lib的产值，并将潜在的环境危害降到最低。为此，为了替代繁琐且污染严重的处理工艺，我们提出了一种高温熔盐策略来直接再生锂离子电池的废阴极，该策略也可以克服以往低温熔盐修复不完全缺陷的障碍。高能稳定的介质环境保证了还原反应更加彻底和高效，同时也为原子重排和晶粒二次生长提供了充足的动力。因此，再生三元阴极（R-NCM）具有显著增强的结构稳定性，有效地抑制了裂纹和有害副反应的发生。R-NCM具有优异的循环稳定性，在摄氏温度下循环200次后仍能保持81.2%的容量。该技术进一步优化了传统的共晶熔盐方法，拓宽了其适用性，并在更广泛的条件下提高了再生阴极的性能。

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引用次数: 0

Atomically dispersed Fe boosting elimination performance of g-C3N4 towards refractory sulfonic azo compounds via catalyst-contaminant interaction 通过催化剂与污染物的相互作用，原子分散的铁元素提高了 g-C3N4 对难熔磺酰基偶氮化合物的消除性能

Advanced Powder Materials

Pub Date : 2024-11-01 DOI: 10.1016/j.apmate.2024.100251

Puying Liang , Zhouping Wang , Shiyu Liao , Yang Lou , Jiawei Zhang , Chengsi Pan , Yongfa Zhu , Jing Xu

Herein, an oxygen-doped porous g-C₃N₄ photocatalyst modified with atomically dispersed Fe (Fe₁/OPCN) is successfully prepared and exhibits significant superiority in removing refractory sulfonic azo contaminants from water via catalyst-contaminant interaction. The elimination performance of Fe₁/OPCN towards acid red 9, acid red 13 and amaranth containing similar azonaphthalene structure and increasing sulfonic acid groups increases gradually. The amaranth degradation rate of Fe₁/OPCN is 17.7 and 6.1 times as that of homogeneous Fenton and OPCN, respectively. In addition, Fe₁/OPCN also has more outstanding removal activities towards other contaminants with sulfonic acid and azo groups alone. The considerable enhancement for removing sulfonic azo contaminants of Fe₁/OPCN is mainly ascribed to the following aspects: (1) The modified Fe could enhance the adsorption towards sulfonic azo compounds to accelerate the mass transfer, act as e⁻ acceptor to promote interfacial charge separation, and trigger the self-Fenton reaction to convert in-situ generated H₂O₂ into •OH. (2) Fe(Ⅲ) could coordinate with —N=N— to form d-π conjugation, which could attract e⁻ transfer to attack —N=N— bond. Meanwhile, the inhibited charge recombination could release more free h⁺ to oxidize sulfonic acid groups into SO₄⁻•. (3) Under the cooperation of abundant multiple active species (•O₂⁻, h⁺, e⁻, •OH, SO₄⁻•) formed during the degradation reaction, sulfonic azo compounds could be completely mineralized into harmless small molecules (CO₂, H₂O, etc.) by means of —N=N— cleavage, hydroxyl substitution, and aromatic ring opening. This work offers a novel approach for effectively eliminating refractory sulfonic azo compounds from wastewater.

本文成功制备了一种用原子分散的 Fe（Fe1/OPCN）修饰的掺氧多孔 g-C3N4 光催化剂，并通过催化剂与污染物的相互作用，在去除水中难去除的磺酸偶氮污染物方面表现出显著的优势。Fe1/OPCN 对酸性红 9、酸性红 13 和含有类似偶氮萘结构且磺酸基团不断增加的苋菜的消除性能逐渐提高。Fe1/OPCN 对苋菜的降解率分别是均相 Fenton 和 OPCN 的 17.7 倍和 6.1 倍。此外，Fe1/OPCN 对其他单独带有磺酸和偶氮基团的污染物的去除活性也更为突出。Fe1/OPCN 对磺酸偶氮污染物的去除率显著提高主要归因于以下几个方面：（1）修饰的 Fe 可增强对磺酸偶氮化合物的吸附以加速传质，作为电子受体促进界面电荷分离，并引发自 Fenton 反应将原位生成的 H2O2 转化为 -OH。(2) Fe(Ⅲ)能与 -N=N- 配位形成 d-π 共轭，从而吸引 e- 转移攻击 -N=N- 键。同时，受抑制的电荷重组可以释放出更多的游离 h+，将磺酸基团氧化成 SO4--。(3) 在降解反应中形成的丰富的多种活性物种（-O2-、h+、e-、-OH、SO4--）的协同作用下，磺酰基偶氮化合物可通过-N=N-裂解、羟基取代和芳香环打开等方式完全矿化为无害的小分子（CO2、H2O 等）。这项研究为有效消除废水中的难溶性磺酰基偶氮化合物提供了一种新方法。

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引用次数: 0

Controllable synthesis and heterogeneous tailoring of 1D perovskites, emerging properties and applications 一维过氧化物的可控合成和异质定制、新兴特性和应用

Advanced Powder Materials

Pub Date : 2024-10-24 DOI: 10.1016/j.apmate.2024.100250

En Yang , Mengna Zhang , Shuaishuai Wei , Dan Liang , Mustafa Zeb , Liping Zhang , Yoonseob Kim , Yuan Zhao , Wei Ma

One-dimensional perovskites possess unique photoelectric properties that distinguish them from other perovskite types, making them a focal point in photoelectric research. In recent years, there has been a significant surge in interest surrounding the synthesis and application of one-dimensional anisotropic perovskites, spurred by advancements in synthesis techniques and notable breakthroughs in novel methodologies and application properties. This article provides a comprehensive review of the progress made in research on one-dimensional anisotropic perovskites, detailing the synthesis mechanisms and potential pathways for performance enhancement in various applications. We highlight the crucial role of controllable synthesis and heterogeneous effect in tailoring perovskite properties to boost application efficacy. Initially, this review examines the primary synthesis methods and mechanisms for creating heterogeneously induced one-dimensional anisotropic perovskites, categorizing them into two main approaches: the classical wet chemical synthesis, which utilizes selective ligands, and the ligand-free, substrate-assisted method. The precision in controllable synthesis is essential for fabricating heterogeneous structures, where the synthesized precursor, shape, and surface ligand significantly influence the interfacial strength of the heterogenic interface. We also discuss the key features that must be improved for high-performance applications, exploring how heterogeneous effects can enhance performance and drive the development of heterogeneous devices in various applications, such as photodetectors, solar cells, light-emitting diodes, and photocatalysis. Conclusively, by highlighting the emerging potential and promising opportunities offered by strategic heterogeneous construction, we forecast a dynamic and transformative future for their production and application landscapes.

一维包光体具有区别于其他类型包光体的独特光电特性，使其成为光电研究的焦点。近年来，由于合成技术的进步以及新方法和应用特性方面的显著突破，人们对一维各向异性包光体的合成和应用兴趣大增。本文全面回顾了一维各向异性包晶石的研究进展，详细介绍了合成机制以及在各种应用中提高性能的潜在途径。我们强调了可控合成和异质效应在定制包光体特性以提高应用效率方面的关键作用。首先，本综述探讨了创建异质诱导一维各向异性包晶的主要合成方法和机制，并将其分为两种主要方法：一种是利用选择性配体的经典湿化学合成法，另一种是无配体的基底辅助法。可控合成的精确性对于制造异质结构至关重要，因为合成的前驱体、形状和表面配体会对异质界面的界面强度产生重大影响。我们还讨论了为实现高性能应用而必须改进的关键特性，探讨了异质效应如何提高性能并推动异质器件在光探测器、太阳能电池、发光二极管和光催化等各种应用中的发展。最后，通过强调战略性异质结构所带来的新兴潜力和大有可为的机遇，我们预测了其生产和应用前景充满活力和变革性的未来。

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引用次数: 0

Promoting homogeneous tungsten doping in LiNiO2 through a grain boundary phase induced by excessive lithium 通过过量锂诱导的晶界相促进镍钴锰酸锂中掺杂钨的均匀性

Advanced Powder Materials

Pub Date : 2024-10-12 DOI: 10.1016/j.apmate.2024.100248

Junjie Wang , Yucen Yan , Zilan Zhao , Jiayi Li , Gui Luo , Duo Deng , Wenjie Peng , Mingxia Dong , Zhixing Wang , Guochun Yan , Huajun Guo , Hui Duan , Lingjun Li , Shihao Feng , Xing Ou , Junchao Zheng , Jiexi Wang

LiNiO₂ (LNO) is one of the most promising cathode materials for lithium-ion batteries. Tungsten element in enhancing the stability of LNO has been researched extensively. However, the understanding of the specific doping process and existing form of W are still not perfect. This study proposes a lithium-induced grain boundary phase W doping mechanism. The results demonstrate that the introduced W atoms first react with the lithium source to generate a Li–W–O phase at the grain boundary of primary particles. With the increase of lithium ratio, W atoms gradually diffuse from the grain boundary phase to the interior layered structure to achieve W doping. The feasibility of grain boundary phase doping is verified by first principles calculation. Furthermore, it is found that the Li₂WO₄ grain boundary phase is an excellent lithium ion conductor, which can protect the cathode surface and improve the rate performance. The doped W can alleviate the harmful H2↔H3 phase transition, thereby inhibiting the generation of microcracks, and improving the electrochemical performance. Consequently, the 0.3 wt% W-doped sample provides a significant improved capacity retention of 88.5 % compared with the pristine LNO (80.7 %) after 100 cycles at 2.8–4.3 V under 1C.

LiNiO2 （LNO）是最有前途的锂离子电池正极材料之一。钨元素在提高 LNO 稳定性方面的作用已被广泛研究。然而，人们对钨的具体掺杂过程和现有形态的认识还不够完善。本研究提出了一种锂诱导的晶界相 W 掺杂机制。结果表明，引入的 W 原子首先与锂源发生反应，在原生粒子的晶界处生成 Li-W-O 相。随着锂比例的增加，W 原子逐渐从晶界相扩散到内部层状结构，从而实现 W 掺杂。第一性原理计算验证了晶界相掺杂的可行性。此外，研究还发现 Li2WO4 晶界相是一种优良的锂离子导体，可以保护正极表面并提高速率性能。掺杂的 W 可以缓解有害的 H2↔H3 相变，从而抑制微裂缝的产生，改善电化学性能。因此，与原始 LNO（80.7%）相比，掺杂了 0.3 wt% W 的样品在 1C 下于 2.8-4.3 V 条件下循环 100 次后，容量保持率显著提高了 88.5%。

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