Journal of Colloid and Interface Science最新文献

{"title":"Mechanistic insights into the impact of bromide ion adsorption and surface bromination on Cu2O for enhanced selectivity and activity in electrochemical CO2 reduction","authors":"Zhenli Lv ,&nbsp;Guorui Ma ,&nbsp;Haiqiang Mu ,&nbsp;Jiaxing Guo ,&nbsp;Min Zhu ,&nbsp;Jing Li ,&nbsp;Feng Li","doi":"10.1016/j.jcis.2025.137492","DOIUrl":"10.1016/j.jcis.2025.137492","url":null,"abstract":"<div><div>The enhanced selectivity for C₂₊ products in the electrochemical CO₂ reduction reaction (ECO₂RR) is critically dependent on the regulation of the elemental existence state on the surface of the electrocatalyst. In this study, Cu₂O nanowires featuring multiple grain boundaries were successfully synthesized. Two distinct model catalysts were prepared: one through surface adsorption of Br⁻ (denoted as Cu₂O_Br) and the other via surface bromination (denoted as Cu₂O@CuBr). These models were employed to systematically investigate the influence of the differences between Br⁻ adsorption on the Cu₂O surface and surface bromination on activity and product selectivity. The integration of in-situ characterization techniques with electrochemical measurements revealed that Br⁻ adsorption induces a stable charge distribution on the catalyst surface, accompanied by a consistent potential drop within the double layer. This signifies stable and efficient processes of CO₂ adsorption, electron transfer, and mass transfer at the electrode/electrolyte interface. Under these conditions, Cu₂O_Br exhibits high stability. In contrast, catalyst surfaces modified via surface bromination are prone to Br⁻ dissolution during electrolysis, leading to structural changes and significant surface reconstruction, which ultimately compromise the catalyst’s selectivity. Notably, the Cu₂O_Br catalyst achieved a maximum Faradaic efficiency (FE) of 98 % for CO production at −0.4 V vs. RHE and 42 % for C₂H₆ production at −0.6 V vs. RHE. Additionally, the Cu₂O_Br catalyst reached an optimal FE_C2+ of 60 % at −0.6 V, which is 1.5 times higher than that of the pure Cu₂O catalyst under the same potential and 2.5 times higher than that of the Cu₂O@CuBr catalyst at −0.9 V. This work provides new insights into enhancing the selectivity and activity of carbon dioxide electroreduction by modulating halide ion adsorption on the catalyst surface and surface halogenation.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"692 ","pages":"Article 137492"},"PeriodicalIF":9.4,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancement of carbon monoxide catalytic oxidation performance by co-doping silver and cerium in three-dimensionally ordered macroporous Co-based catalyst","authors":"Bing Cui,&nbsp;Miaomiao Hu,&nbsp;Kun Zhou,&nbsp;Yuanjun Li,&nbsp;Tingyi Zhao,&nbsp;Menglan Xiao,&nbsp;Zhihui Shao,&nbsp;Mingqin Zhao","doi":"10.1016/j.jcis.2025.137483","DOIUrl":"10.1016/j.jcis.2025.137483","url":null,"abstract":"<div><div>Carbon monoxide (CO) catalytic oxidation offers an effective solution for environmental pollutant; however, its progress is limited by sluggish kinetics, and efficient catalysts remain scarce. Herein, we prepared Ag-Ce co-doped three-dimensionally ordered macroporous (3DOM) Co-based catalysts through the synergistic approach of co-doping and morphology control, systematically investigating their CO catalytic oxidation mechanisms. The appropriate amount of Ag-Ce co-doping maintained the original 3DOM structure, promote the mass transfer and diffusion of CO, promoted the redox capacity by increasing the ratio of Co³⁺ to surface reactive oxygen species (O⁻/ O^2–), achieving low temperature conversion of CO. Specifically, concentration of Co³⁺ is promoted via Co²⁺ + Ag⁺ → Ag⁰ + Co³⁺ and then combining the generated the active oxygen specie reduce the CO conversion temperature (Co³⁺ + O⁻/ O^2– + CO → CO₂ + Co²⁺). Among them 3D-5 %AgCo₁₆Ce₁ exhibited a lower activation energy (<em>E</em>_a) and <em>T</em>₅₀, which were only 48.79 KJ mol⁻¹ and 76.8 °C, respectively. Theoretical calculation indicated that the synergistic of co-doped system can lower down the O₂ dissociation energy barrier by 0.242 eV compared with 3D-Co₁₆Ce₁, thus facilizing the generation of active oxygen species and improving the oxidation kinetic of CO. This work innovated the preparation method of 3DOM co-doped system and provided opportunities to design high-performance heterogeneous catalysts.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"692 ","pages":"Article 137483"},"PeriodicalIF":9.4,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Co0.5CuP loaded Cd0.9Co0.1S hollow nanospheres with p-n heterojunction for photocatalytic hydrogen production","authors":"Qian Liu ,&nbsp;Changdi Wang ,&nbsp;Jianxiang Wang ,&nbsp;Xiangjie Cui ,&nbsp;Xingrong Zhang ,&nbsp;Ruiyang Zhao ,&nbsp;Jishu Han ,&nbsp;Lei Wang","doi":"10.1016/j.jcis.2025.137491","DOIUrl":"10.1016/j.jcis.2025.137491","url":null,"abstract":"<div><div>The development of efficient and stable composite photocatalysts is crucial for advancing the field of photocatalytic hydrogen production. In this paper, the Co_0.5CuP/Cd_0.9Co_0.1S composite photocatalyst was synthesized by the template etching method and the in-situ growth method. The Co_0.5CuP was tightly anchored on the surface of hollow structure Cd_0.9Co_0.1S nanospheres. The hydrogen production efficiency of the Co_0.5CuP/Cd_0.9Co_0.1S composite photocatalyst was enhanced by adjusting the doping proportion of cobalt and the loading quantity of Co_0.5CuP. Meanwhile, a p-n heterojunction was formed between Co_0.5CuP and Cd_0.9Co_0.1S, which enhanced the separation of photoinduced charge carriers and further boosted the efficiency of photocatalytic hydrogen production. The results showed that the photocatalytic hydrogen evolution efficiency of Co_0.5CuP/Cd_0.9Co_0.1S could reach 9.64 mmol·g⁻¹·h⁻¹. In addition, the photocatalytic reaction mechanism of the Co_0.5CuP/Cd_0.9Co_0.1S composite photocatalyst was inferred based on the photoelectrochemical test and density functional theory calculation. This approach pioneers a novel pathway for the preparation of heterojunction photocatalysts by the combination of transition metal phosphide and hollow multi-metal sulfides.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"692 ","pages":"Article 137491"},"PeriodicalIF":9.4,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel production of basalt nanosheets with ultrahigh aspect ratios and their assembly with nylon membranes for high-performance electrical insulating composite membranes","authors":"Dexian Ji ,&nbsp;Shunxi Song ,&nbsp;Xin Tong ,&nbsp;Hao Sun ,&nbsp;Cong Ma ,&nbsp;Baolong Yuan ,&nbsp;Yonghao Ni ,&nbsp;Meiyun Zhang","doi":"10.1016/j.jcis.2025.137466","DOIUrl":"10.1016/j.jcis.2025.137466","url":null,"abstract":"<div><div>The rapid advancement of modern electrical equipment has significantly increased the demand for advanced electrical insulating materials. Traditional silicate nanosheets are widely used as fillers in electrical insulating composites. However, their low aspect ratio restricts their effectiveness in high-performance electrical insulating applications. Here, a three-step liquid exfoliation strategy is proposed to prepare basalt nanosheets (BSNs) with an ultrahigh aspect ratio (up to 1397) from basalt scales (BS). This process involves cation exchange on BS to generate lamellar structures, serving as the basis for the preparation of lithium ion-exchanged BSNs (LBSNs). Next, oxalic acid/hydrogen peroxide treatment breaks the chemical bonds within the LBS sediment, producing chemically treated BSNs (CBSNs). Finally, BSNs are prepared by mixing LBSNs and CBSNs, followed by differential centrifugation to isolate BSNs with an ultrahigh aspect ratio (BSNs-1000). Subsequently, inspired by the overlapping structure of pangolin skin, BSNs-1000 are assembled onto nylon membranes, forming biomimetic nylon/BSNs-1000 (N/B-1000) composite membranes with an overlapping surface structure. This structure forms an effective physical barrier, impeding charge and crack propagation, thereby significantly enhancing their electrical insulating and mechanical properties. The novel exfoliation method and biomimetic strategy provide effective approaches for developing advanced electrical insulating membranes for high-performance electrical equipment.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"692 ","pages":"Article 137466"},"PeriodicalIF":9.4,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cationic porphyrin-based covalent organic frameworks for enhanced phototherapy and targeted chemotherapy of bacterial infections","authors":"Jia-Jun Qian ,&nbsp;Jing-Xuan Guo ,&nbsp;Meng-Chao Wang ,&nbsp;Li-Jian Chen ,&nbsp;Xu Zhao ,&nbsp;Xiu-Ping Yan","doi":"10.1016/j.jcis.2025.137494","DOIUrl":"10.1016/j.jcis.2025.137494","url":null,"abstract":"<div><div>Bacterial infections significantly impede wound healing and threaten global public health. Porphyrin covalent organic frameworks (COFs) have shown promise as phototherapy antibacterial materials. However, the inherent π–π stacking interactions between the monomers also lead to aggregation and quenching of photosensitizers, thereby reducing the production of singlet oxygen (¹O₂) and compromising their antibacterial efficacy. Herein, we designed and prepared a novel cationic porphyrin-based COFs nanoplatform (TAPP-VIO), utilizing photosensitive TAPP and cationic VIO as structural units. This multifunctional nanoplatform is specifically tailored for targeted phototherapy and chemotherapy against bacterial infections. Upon irradiation, TAPP unit in TAPP-VIO generates heat and ¹O₂, which effectively disrupt bacterial structure and cause cell death. The incorporation of VIO unit introduces electrostatic repulsion between layers, mitigating π-π stacking effects and enhancing ¹O₂ production. Additionally, the positive charge imparted by the VIO unit enables TAPP-VIO to bind efficiently to negatively charged bacterial surfaces, immobilizing the bacteria and reducing their motility, thereby improving the overall efficacy of phototherapy<strong>.</strong> Under identical experimental conditions and concentrations, TAPP-VIO exhibits a ¹O₂ generation capacity that is 179% higher than that of nonionic porphyrin COF. Moreover, the temperature increase induced by TAPP-VIO is 85% of that observed with nonionic porphyrin COF (TAPP-MMA-Da), which is conducive to enhancing the phototherapeutic effects while minimizing heat-induced damage to healthy tissues. In summary, our study presents a straightforward approach to developing non-antibiotic antibacterial nanoagents, and the as-prepared TAPP-VIO is a promising candidate drug suitable for clinical trials in the future.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"692 ","pages":"Article 137494"},"PeriodicalIF":9.4,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing CO tolerance via molecular trapping effect: Single-atom Pt anchored on Mo2C for efficient alkaline hydrogen oxidation reaction","authors":"Xiaokun Yang ,&nbsp;Wenjie Yu ,&nbsp;Yanfeng Zhang ,&nbsp;Chuanpeng Qiao ,&nbsp;Lili Liu ,&nbsp;Yongfang Zhang ,&nbsp;Qirui Li ,&nbsp;Mengfei Mou ,&nbsp;Rutao Wang ,&nbsp;Xiangsen Yuan ,&nbsp;Zhihao Wang ,&nbsp;Liting Yan ,&nbsp;Xuebo Zhao","doi":"10.1016/j.jcis.2025.137489","DOIUrl":"10.1016/j.jcis.2025.137489","url":null,"abstract":"<div><div>Developing highly efficient, stable, and CO-tolerant electrocatalysts for hydrogen oxidation reaction (HOR) remains a critical challenge for practical proton/anion exchange membrane fuel cells. Here in, an atomically dispersed platinum (Pt) on Mo₂C nanoparticles supported on nitrogen-doped carbon (Pt_SAMo₂C-NC) with a unique yolk-shell structure is presented as a highly efficient and stable catalyst for HOR. The Pt_SAMo₂C-NC catalyst demonstrates remarkable HOR performance, with a high exchange current density of 2.7 mA cm⁻² and a mass activity of 2.15 A/mg_Pt at 50 mV (vs. RHE), which are 1.5 and 18 times greater than those of the 40 % commercial Pt/C catalyst, respectively. Furthermore, the unique Pt_SAMo₂C-NC structure exhibits superior CO tolerance at H₂/1,000 ppm CO, significantly outperforming commercial Pt/C catalysts. Density functional theory (DFT) calculations indicate that the introduction of Mo₂C forms a strong electronic interaction with Pt, which decreases the electron density around the Pt atoms and shifts the d-band center away from the Fermi level. This results in a reduction of the *H adsorption energy and an optimization of the *OH adsorption energy in Pt_SAMo₂C-NC. In addition, by calculating the CO adsorption energy, it was found that Mo₂C exhibits strong CO adsorption ability, which generating a molecular trapping effect, thereby protecting the Pt active sites from poisoning. The strong metal-support electronic interaction significantly enhances the catalytic activity, stability, and CO tolerance of the material, providing a new strategy for developing catalysts with these desirable properties.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"692 ","pages":"Article 137489"},"PeriodicalIF":9.4,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metal effect boosts the photoelectric properties of two-dimentional Dion-Jacobson (3AMPY)(MA)3M4I13 perovskites","authors":"Gaoyin Wang ,&nbsp;Haoyu Chu ,&nbsp;Ken Deng ,&nbsp;Jinfu Wu ,&nbsp;Qin Ding ,&nbsp;Ping-Ping Sun ,&nbsp;Zhu-Zhu Sun ,&nbsp;Chaoyuan Zeng ,&nbsp;Weijie Chi","doi":"10.1016/j.jcis.2025.137493","DOIUrl":"10.1016/j.jcis.2025.137493","url":null,"abstract":"<div><div>Two-Dimentional (2D) Dion-Jacobson (DJ) perovskites are emerging photovoltaic materials due to their excellent rigid structures and improved environmental stability compared to 2D Ruddlesden-Popper (RP) perovskites. Herein, we adopt 3-(aminomethyl)pyridine (3AMPY) as the divalent interlayer spacer to alleviate the toxicity of lead and explore more highly potential DJ alternatives, the optoelectronic and photovoltaic performance of lead-free DJ (3AMPY)(MA)₃M₄I₁₃ perovskites are investigated by first-principles calculations, where the central metals are considered as Ba, Cd, Cu, Ge, Mg, Mn, Ni, Sn and Zn to replace Pb. Our findings reveal that introducing Mn, Cd, Ni, and Ge can effectively tune the bandgap within the optimal range of 0.90–1.60 eV for solar cell application. Notably, (3AMPY)(MA)₃Ni₄I₁₃ exhibits the most favorable optical response capacity, with the light-harvesting efficiency maintaining 80 % in the UV–Vis range. (3AMPY)(MA)₃Ge₄I₁₃ displays the most excellent carrier transport with electron mobility as high as 555.43 cm² V⁻¹ s⁻¹, exhibiting a great advantage over 2D perovskites. The predicted photovoltaic performance shows that (3AMPY)(MA)₃Mg₄I₁₃ possesses the largest open circuit voltage (<em>V</em>_OC) (2.12 V), (3AMPY)(MA)₃Ge₄I₁₃ has the highest short circuit current density (<em>J</em>_sc) (38.90 mA/cm²), and (3AMPY)(MA)₃Mn₄I₁₃ is with the highest power conversion efficiency (PCE) of 22.55 %. The metal substitutions with Cd, Ni, and Ge show promoted photovoltaic potential over (3AMPY)(MA)₃Pb₄I₁₃. These results form a basis for broadening the potential candidates of this 2D DJ series in photovoltaic perovskite solar cells (PSCs).</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"692 ","pages":"Article 137493"},"PeriodicalIF":9.4,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Liquid-to-gel transitions of phase-separated coacervate microdroplets enabled by endogenous enzymatic catalysis","authors":"Jian Liu ,&nbsp;Junbo Li ,&nbsp;Yan Huang ,&nbsp;Tong Li ,&nbsp;Cheng Xu ,&nbsp;Zhengyu Tao ,&nbsp;Wei Ji ,&nbsp;Xin Huang","doi":"10.1016/j.jcis.2025.137486","DOIUrl":"10.1016/j.jcis.2025.137486","url":null,"abstract":"<div><div>Biomolecular condensates formed by liquid–liquid phase separation (LLPS) play a crucial role in organizing biochemical processes within living cells. The phase transition of these condensates from a functional liquid-like state to a pathological gel-like or solid-like state is believed to be linked to cellular dysfunction and various diseases. Here, we present a biomimetic model to demonstrate that endogenous enzyme-catalyzed crosslinking within condensate-mimicked coacervate microdroplets can promote a liquid-to-gel phase transition. We identify the transformation in physical characteristics of the densely packed microdroplets including reduced internal mobility, increased storage modulus, selective blocking of large nanoparticles, and enhanced salt resistance. The reversible dynamics of gel-like microdroplets mediated by ionic strength exhibited a limited release and recapture of sequestered positively charged guest molecules. Furthermore, we validate that the phase transition contributes to a restricted biochemical process through an enzymatic cascade. Overall, this work represents an adaptive in vitro platform for exploring the phase transitions associated with the physiological functions of biomolecular condensates and offers chemical insights and perspectives for investigating potential mechanisms involved in phase transitions.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"692 ","pages":"Article 137486"},"PeriodicalIF":9.4,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interface control in TiO2/BaTiO3 ferroelectric heterostructures: A bidirectional catalytic pathway toward high-performance Li-S batteries","authors":"Xuanpan Xu ,&nbsp;Haoyun Dou ,&nbsp;Ziwei Zhao ,&nbsp;Rawaid Ali ,&nbsp;Rongjie Zhe ,&nbsp;Lingxia Zheng ,&nbsp;Xinjun Bao ,&nbsp;Baoyan Fan ,&nbsp;Hong-En Wang","doi":"10.1016/j.jcis.2025.137467","DOIUrl":"10.1016/j.jcis.2025.137467","url":null,"abstract":"<div><div>Li-S batteries (LSBs), noted for their high energy density and low cost, face challenges due to sluggish lithium polysulfide (LiPS) redox kinetics and complex phase transformations during charge/discharge cycles. Herein, we introduce a novel hollow nanocomposite, a titanium oxide/barium titanate (TiO₂/BaTiO₃) heterostructure with an ultrathin carbon coating, designed to act as a bidirectional electrocatalyst, enhancing the sequential conversion of sulfur (S₈) to Li₂S₄ and then to lithium sulfide (Li₂S). The ferroelectric nature of BaTiO₃ enhances LiPS adsorption, reducing the shuttling effect and improving battery performance. The interface-induced electric field directs LiPS migration to TiO₂, facilitating the redox process. An applied electric field polarizes the heterostructure, optimizing the dipole moment of BaTiO₃ and further enhancing performance. Electrochemical measurements and theoretical calculations confirm the superior electrocatalytic activity of TiO₂/BaTiO₃@C for LiPS redox kinetics. The composite electrode achieves a high initial capacity of 836 mAh g⁻¹ at 1C, retaining 64 % of its capacity after 400 cycles with a low fading rate of 0.075 % per cycle. Under practical operation conditions (sulfur areal loading: 6.02 mg cm⁻²; electrolyte/sulfur (E/S) ratio: 6.5 μL mg⁻¹), the as-fabricated LSBs still demonstrate good areal capacities of 5.18, 4.09, 3.84, 3.64, and 3.15 mAh cm⁻², respectively, at current densities from 0.05 to 0.5C. This study elucidates the critical synergy between self-induced electric fields and heterostructure engineering in polysulfide conversion, providing fundamental guidance for designing advanced catalysts in high-energy LSBs and related electrochemical energy systems.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"692 ","pages":"Article 137467"},"PeriodicalIF":9.4,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Boosting ammonium-ion storage of V2O5·nH2O by encapsulating engineering of polyaniline","authors":"Juntao Wang ,&nbsp;Ziqi Ren ,&nbsp;Xianfang Tan ,&nbsp;Dongzhi Chen ,&nbsp;Hanmei Jiang ,&nbsp;Yifu Zhang ,&nbsp;Zhenhua Zhou ,&nbsp;Xiaoming Zhu ,&nbsp;Changgong Meng","doi":"10.1016/j.jcis.2025.137482","DOIUrl":"10.1016/j.jcis.2025.137482","url":null,"abstract":"<div><div>The design and development of new host materials for ammonium-ion supercapacitors (NH₄⁺-SCs) has been one of the topics of ongoing concern in recent years. Vanadium oxide has always been one of the most eye-catching electrode materials in the field of aqueous NH₄⁺ energy storage. However, in the process of repeated charge/discharge, due to the direct contact with the aqueous electrolyte, vanadium oxide dissolution and structural collapse inevitably appear, and there is also the problem of low intrinsic conductivity, so it is urgent to address these issues. In this work, the conductive polymer polyaniline (PANI) is coated on the surface of V₂O₅·<em>n</em>H₂O (VOH) by a simple hydrothermal method to form V₂O₅·<em>n</em>H₂O@polyaniline (VOH@PANI) nanobelts with core–shell structure to improve the structural endurance and NH₄⁺ storage capacity. The experimental and theoretical calculation results show that the introduction of PANI shells on VOH nanobelts can enhance the structural stability, ion/charge transfer and transport dynamics, thereby improving the NH₄⁺ storage capacity and making it an ideal host material for NH₄⁺-SCs. VOH@PANI core–shell composite has a specific capacitance of 453 F·g⁻¹ at 0.5 A·g⁻¹, far exceeding VOH (271 F·g⁻¹) and PANI (295 F·g⁻¹). The VOH@PANI//active carbon (AC) hybrid supercapacitor (HSC) composed of VOH@PANI cathode and AC anode has good electrochemical performance and practical application value. The technique offers suggestions for strengthening electrical conductivity and preventing structural collapse of other fragile materials.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"692 ","pages":"Article 137482"},"PeriodicalIF":9.4,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}