Ceramics International最新文献

{"title":"Structural, magnetic, and magnetocaloric characterizations of geometrically-frustrated SrRE2O4 (RE = Gd, Dy, Ho, Er) oxides for low-temperature cooling applications","authors":"Junli Lin ,&nbsp;Si Wu ,&nbsp;Kaitong Sun ,&nbsp;Hai-Feng Li ,&nbsp;Wang Chen ,&nbsp;Yikun Zhang ,&nbsp;Lingwei Li","doi":"10.1016/j.ceramint.2024.10.042","DOIUrl":"10.1016/j.ceramint.2024.10.042","url":null,"abstract":"<div><div>The magnetocaloric (MC) properties of many rare earth (<em>RE</em>)-based magnetic solids have been intensively investigated. This research aims to develop suitable MC materials for low-temperature cooling application and to better elucidate their intrinsic properties. We have fabricated four single-phase Sr<em>RE</em>₂O₄ (<em>RE</em> = Gd, Dy, Ho, Er) oxides and conducted a systematic experimental investigation into their structural, magnetic, and low-temperature MC properties. All these Sr<em>RE</em>₂O₄ oxides crystallize in an orthorhombic structure (space group <em>Pnma</em>) and exhibit typical geometrical frustration. This frustration arises from the one-dimensional <em>RE</em> ion zigzag ladders along the <em>c</em>-axis, which link the two-dimensional honeycomb lattice in the <em>ab</em> plane. The elements in Sr<em>RE</em>₂O₄ oxides are uniformly distributed and present with valence states of Sr²⁺, <em>RE</em>³⁺, and O²⁻, respectively. Large low-temperature MC effects and notable performances are realized in these Sr<em>RE</em>₂O₄ oxides, determined by the MC parameters of magnetic entropy change, refrigerant capacity, and temperature-averaged entropy change (with a lift of 5 K). These MC parameters under a magnetic field change of 0–70 kOe are as follows: 34.18 J/kgK, 275.88 J/kg, and 30.74 J/kgK for SrGd₂O₄; 18.13 J/kgK, 253.83 J/kg, and 17.54 J/kgK for SrDy₂O₄; 18.81 J/kgK, 354.77 J/kg, and 18.61 J/kgK for SrHo₂O₄; and 22.63 J/kgK, 284.25 J/kg, and 21.97 J/kgK for SrEr₂O₄. These values are comparable to those of most recently updated low-temperature MC materials with remarkable performances, making these Sr<em>RE</em>₂O₄ oxides highly interesting for practical cooling applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 51269-51277"},"PeriodicalIF":5.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Free radical-initiated direct ink writing of liquid polycarbosilane slurry and its conversion into SiC ceramic parts with low shrinkage","authors":"Yanyan Deng ,&nbsp;Luke Ma ,&nbsp;Xueliang Pei ,&nbsp;Qing Huang ,&nbsp;Zhengren Huang","doi":"10.1016/j.ceramint.2024.10.040","DOIUrl":"10.1016/j.ceramint.2024.10.040","url":null,"abstract":"<div><div>Additive manufacturing technology is being developed for manufacturing SiC ceramic parts with designed shape and microstructure. In this study, direct ink writing (DIW) was adopted to print SiC ceramic parts. To avoid incorporating volatile organic solvents or water, a SiC ceramic precursor liquid polycarbosilane (LPCS) was used as the binder of SiC powder and the rheological adjustment additive. The content of LPCS with the content and diameter of SiC powder were optimized to improve the fluidity of slurry, increase its ceramic yield and reduce its shrinkage during pyrolysis. According to the results of rheological analysis and shrinkage during pyrolysis, 78 wt% SiC powders composed of 40 nm SiC powder and 5 μm SiC powder in a ratio of 1:6 was appropriate. For achieving rapid solidification rate of the slurry at low temperature, a free‐radical initiator which can trigger the crosslinking of allyl group on LPCS was incorporated. According to the results of rheology, DSC and FT-IR, the preferred platform temperature for fast curing of DIW slurry was 150 °C. As the slurry accumulated layer by layer on heating platform, the cured green bodies were successfully prepared. After pyrolysis to 1200 °C, SiC ceramic parts were obtained with only 4.43 % linear shrinkage associated with the precursor-to-ceramic conversion. Because the shrinkage was limited, no obvious deformation or crack was found.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 51252-51259"},"PeriodicalIF":5.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of non-static pre-oxidation treatment on the cyclic ablation behavior of SiC-ZrC/SiC multilayer coated graphite","authors":"Cheng Yang ,&nbsp;Chen Zeng ,&nbsp;Ping Xu ,&nbsp;Weijie Song ,&nbsp;Jinping Liu ,&nbsp;Yu Zhang ,&nbsp;Jie Xiong ,&nbsp;Qichang Li ,&nbsp;Zhean Su ,&nbsp;Qizhong Huang","doi":"10.1016/j.ceramint.2024.10.037","DOIUrl":"10.1016/j.ceramint.2024.10.037","url":null,"abstract":"<div><div>SiC-ZrC based ceramics have caught much attention as coatings for graphite materials. However, the coefficient of thermal expansion (CTE) mismatch between coatings and matrix severely limits their application in harsh environments. Herein, we proposed a non-static pre-oxidation treatment under an air pressure of 0.05 MPa to increase the surface roughness of graphite matrix to 18.054 μm and then prepared the SiC-ZrC/SiC multilayer coating on the pre-oxidized graphite. The results demonstrate that a firm interlocking structure was formed between SiC-ZrC/SiC multilayer coating and graphite matrix, which effectively improved the bonding strength and enhanced the cyclic ablation resistance of coatings. The bonding strength of SiC-ZrC/SiC multilayer coated on graphite pre-oxidized under negative pressure was 5.70 ± 0.42 MPa, which was 54.89 % higher than that on graphite pre-oxidized under atmospheric pressure (3.68 ± 0.08 MPa). After the plasma ablation for 360 s (60 s × 6), the linear and mass ablation rates of SiC-ZrC/SiC multilayer coated graphite which was pre-oxidized under negative pressure were −0.083 μm/s and 0.101 mg/s, respectively.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 51218-51228"},"PeriodicalIF":5.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of (Zr0.25Hf0.25Ta0.25Nb0.25)C high-entropy ceramic nanopowders via liquid-phase precursor route at a low temperature of 1500 °C","authors":"Chenyi Xie ,&nbsp;Huaming Miao ,&nbsp;Yanfei Wang,&nbsp;Duan Li,&nbsp;Rongjun Liu","doi":"10.1016/j.ceramint.2024.10.039","DOIUrl":"10.1016/j.ceramint.2024.10.039","url":null,"abstract":"<div><div>Using citric acid, ethylene glycol, ZrOCl₂·8H₂O, HfOCl₂·8H₂O, NbCl₅, and TaCl₅ as raw materials, based on the principle of Pechini coordination polymerization, the (Zr_0.25Hf_0.25Ta_0.25Nb_0.25)C high-entropy ceramic precursor solution was successfully prepared, and the corresponding high-entropy ceramic powder was formed by pyrolysis at a low temperature of 1500 °C. The molecular structure of the precursor and its pyrolysis products were analyzed and characterized by different analytical and testing methods. The results show that in the precursor solution, the organic compound and the metal ions form a stable three-dimensional macromolecular structure, so that the metal ions show a uniform distribution at the molecular level, shortening the diffusion path during the carbothermal reduction reaction, thereby enabling the formation of the single-phase high-entropy carbide ceramic powders at a relatively low temperature. The obtained ceramic powders have high purity, uniform element distribution, with an average particle diameter of approximately 42 nm and an oxygen content of about 1.61 wt%. The precursor solution prepared in this study has a moderate viscosity of 20–50 mPa s and a high ceramic yield of 45 %, which is ideal for the preparation of high-entropy ceramic matrix composites.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 51243-51251"},"PeriodicalIF":5.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic effect induces self crystallization of CsPbBr3 quantum dots in borosilicate glass matrix by LiF","authors":"Bojie Ding ,&nbsp;Xinhao Cai ,&nbsp;Shenglin Ma ,&nbsp;Ruiting Liang ,&nbsp;Imran Khan ,&nbsp;Jianbei Qiu ,&nbsp;Yue Liu ,&nbsp;Anjun Huang ,&nbsp;Zhiguo Song ,&nbsp;Yangke Cun ,&nbsp;Cherkasova Tatiana ,&nbsp;Zhengwen Yang","doi":"10.1016/j.ceramint.2024.10.043","DOIUrl":"10.1016/j.ceramint.2024.10.043","url":null,"abstract":"<div><div>Cesium lead halide perovskite (CsPbX₃) quantum dots (QDs) are recognized as viable substitutes for conventional fluorescent powder color converters, which can improve the color gamut and reproducibility of liquid crystal displays (LCDs). Encapsulating QDs in glass can effectively solve the water oxygen stability of QDs, but the glass matrix impedes the nucleation of QDs and the precipitation of QDs requires secondary heating. In our research, we successfully accomplished the self-crystallization of CsPbBr₃ QDs facilitated by LiF within a B₂O₃-SiO₂-ZnO borosilicate glass matrix. The results indicate that the self crystallization of CsPbBr₃ QDs induced by LiF in borosilicate glass matrix has a synergistic effect. The Li ⁺ ions can break the glass network structure and facilitate ionic migration and transport, while F⁻ ions have good electronegativity due to ion aggregation, and can strongly attract Cs⁺ and Pb²⁺ ions with larger atomic radii, thereby promoting the rapid nucleation and growth of CsPbBr₃ QDs, ultimately synthesizing QDs with uniform particle size, narrow half peak width, good optical properties, and thermal stability.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 51278-51283"},"PeriodicalIF":5.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Versatile binder system as enabler for multi-material additive manufacturing of ceramics by vat photopolymerization","authors":"Johannes Schubert,&nbsp;Chantal-Liv Lehmann,&nbsp;Frederik Zanger","doi":"10.1016/j.ceramint.2024.10.006","DOIUrl":"10.1016/j.ceramint.2024.10.006","url":null,"abstract":"<div><div>Vat photopolymerization is an additive manufacturing process for producing ceramics with high printing resolution. Extending this approach to multi-material additive manufacturing, the aim is to combine two or more different ceramics in a single component to aggregate their advantages. For this, binders for different ceramic materials are required. To enhance the debinding step, this work aimed to develop a versatile binder system suitable for different ceramic materials. Finally, a binder system was developed and qualified for several different ceramic materials. By thermogravimetrical analyses, a suitable temperature curve for debinding was derived. In a final sintering step, the components were densified almost defect-free. Therefore, this work serves as an enabler for multi-material vat photopolymerization.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50948-50954"},"PeriodicalIF":5.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of structural, optical, dielectric and magnetic properties of Gd3+ substituted Mg-Mn mixed spinel ferrite ceramics","authors":"Varsa Purohit ,&nbsp;Babita Ojha ,&nbsp;Rakesh Ranjan Sahoo ,&nbsp;Dhrubananda Behera ,&nbsp;Gorachand Biswal","doi":"10.1016/j.ceramint.2024.10.011","DOIUrl":"10.1016/j.ceramint.2024.10.011","url":null,"abstract":"<div><div>Manganese magnesium ferrite (Mg_0.5Mn_0.5Fe₂O₄) and Gd doped Mg_0.5Mn_0.5Fe₂O₄ (Mg_0.5Mn_0.5Fe_2-xGd_xO₄ (x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5) were synthesized using the solid-state method. The structural study was performed using the powder X-ray diffraction (XRD) technique. The XRD plot confirms the presence of a spinel cubic structure for pure MgMn ferrite and the existence of a secondary GdFeO₃ phase in addition to the cubic spinel phase for Gd-doped MgMn ferrite. The average crystallite size estimated from the Williamson-Hall plot decreases from 42.75 nm to 18.97 nm with the increase in Gd content. The microstructural study confirms the clear grains with well-defined grain boundaries. The Fourier Transform Infrared (FTIR) spectra of the samples show the vibrational bands at 3440 cm⁻¹, 1636 cm⁻¹, 1385 cm⁻¹, 1100 cm⁻¹, and 560 cm⁻¹ assigned to tetrahedral and octahedral sites. The improvement in dielectric property has been observed for Gd-doped samples. The saturation magnetization and remnant magnetization decrease from 0.7 to 0.3 emu and 0.035 to 0.0273 emu respectively. The coercivity increases from 31 to 75 Oe with the increase in Gd content. The fabricated spinel ferrites have significant electrical and magnetic properties which may be promising candidates for microwave devices.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 51002-51010"},"PeriodicalIF":5.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tuning the emission color of SrLaAlO4:Er,Yb upconversion phosphors by decorating their surface with CsPbBr3-xIx quantum dots","authors":"Carlos Rodriguez-Garcia ,&nbsp;Diego Esparza ,&nbsp;Jorge Oliva","doi":"10.1016/j.ceramint.2024.10.032","DOIUrl":"10.1016/j.ceramint.2024.10.032","url":null,"abstract":"<div><div>In this work, SrLaAlO₄:Er³⁺ (2 mol%),Yb³⁺ (4 mol%) upconversion phosphor was synthesized by using a combustion method. Later, CsPbBr_3-xI_x (x = 0, 1.5 and 0.75) perovskite quantum dots (QDs) were synthesized by using hot injection method. According the analysis by X-ray diffraction, the SrLaAlO₄:Er,Yb (SL:Er,Yb) phosphors and QDs had tetragonal and cubic phases, respectively. Moreover, the analysis by microscopy revealed that the SL:Er,Yb phosphors are composed of micro-grains with irregular morphology, while the CsPbBr_3-xI_x QDs had a morphology of cubes. The surface of the SL:Er,Yb phosphors was decorated with CsPbBr_3-xI_x QDs and obtained three composite powders: CsPbBr₃+SL:Er,Yb, CsPbBr_1.5I_1.5+SL:Er,Yb and CsPbBr_2.25I_0.75+SL:Er,Yb. Those composites were firstly excited with UV light (380 nm) and produced emissions in the green and orange-red regions by downconversion. Interestingly, the emission intensity of the composite powders was 45–75 % higher than that for the individual CsPbBr_3-xI_x QDs or SL:Er,Yb phosphors. Later, the same composite powders were excited with NIR light (980 nm), in consequence, intense green and yellow emissions were produced by upconversion. In particular, the CsPbBr_1.5I_1.5+ SL:Er,Yb composite produced strong red emission by upconversion because the presence of the QDs on the SL:Er,Yb surface promoted the following cross relaxation process: ⁴I_11/2 (Er³⁺)+ ⁴F_7/2 (Er³⁺)→⁴F_9/2 (Er³⁺)+ ⁴F_9/2 (Er³⁺). In general, the quantum dots deposited on the SL:Er,Yb surface not only enhanced the red upconversion emission, but also provoked a color tuning when they are excited with NIR or UV light. Those last effects have not been reported in the literature previously. Thus, the results of this investigation demonstrate that combining perovskite quantum dots and the SL:Er,Yb forms a luminescent material able to tune its emission by upconversion or downconversion. This last property can be utilized for the design of new LED based lamps, which are employed for general illumination in houses and buildings.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 51172-51180"},"PeriodicalIF":5.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Minimizing the cobalt content in black ceramic pigments by Design of Experiments","authors":"Marzia Guerrini ,&nbsp;Lisa Rita Magnaghi ,&nbsp;Martina Fracchia ,&nbsp;Maria Pia Riccardi ,&nbsp;Gabriele Pigoni ,&nbsp;Gianfranco Debbi ,&nbsp;Maddalena Patrini ,&nbsp;Raffaela Biesuz ,&nbsp;Serena Chiara Tarantino ,&nbsp;Umberto Anselmi Tamburini ,&nbsp;Paolo Ghigna","doi":"10.1016/j.ceramint.2024.10.033","DOIUrl":"10.1016/j.ceramint.2024.10.033","url":null,"abstract":"<div><div>This paper presents a comprehensive optimization strategy for the synthesis of new black ceramic pigments with low cobalt content while maintaining a single-phase spinel structure. The aim is to achieve comparable hues to those of an industrial benchmark containing five transition metals while minimizing the environmental impact. Exploring all possible compositions deriving from a five–component system (Cr, Mn, Fe, Co and Ni), through traditional methods would be extremely time consuming to guarantee an efficient sampling, requiring high experimental efforts. Hence, to identify the best black compositions, we employed a chemometric approach, the Design of Experiments, aiming to investigate the compositional domain derived by varying the metals stoichiometry within fixed boundaries to identify optimal pigment compositions. The resulting pigments (comprising Cr, Fe and Co), despite the lower cobalt content, exhibited optimal colorimetric properties comparable to the standard benchmark, with experimental Δ<em>E</em> values comparable to the ones predicted by the model. In particular, the pure spinels Cr_1.05Fe_1.05Co_0.9O₄ and Cr_1.2Fe_1.05Co_0.75O₄ displayed low lightness and chroma (<em>L∗</em> = 2.4; <em>C∗</em> = 5 and <em>L∗</em> = 1.12; <em>C∗</em> = 1.1, respectively), providing deep and dark black tonality. These compositions exhibit promising colorimetric performance and chemical stability, offering potential benefits for industrial applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 51181-51191"},"PeriodicalIF":5.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly efficient adsorption and visible-LEDs-driven photodegradation of tetracycline over novel and green-synthesized p-BiOI/n-Bi2WO6 heterojunctions","authors":"Abraham Aram López-Cano ,&nbsp;Roberto Leyva-Ramos ,&nbsp;Brenda Azharel Jiménez-López ,&nbsp;Damarys Haidee Carrales-Alvarado ,&nbsp;Esmeralda Mendoza-Mendoza","doi":"10.1016/j.ceramint.2024.10.038","DOIUrl":"10.1016/j.ceramint.2024.10.038","url":null,"abstract":"<div><div>Preparing bismuth compounds-based heterojunctions with superior redox capability has emerged as a promising strategy for environmental remediation. Herein, p-BiOI/n-Bi₂WO₆ heterojunctions were successfully obtained via a novel, facile, and green solvothermal method. The heterojunctions were synthesized using different mass ratios (1:2, 1:1, and 2:1) of BiOI (BI) and Bi₂WO₆ (BW), with 1:1 as the best ratio, which was decorated with silver nanoparticles (Ag-NPs) and nitrogen-doped graphene (NG) applying green methodologies. The as-prepared BI/BW heterojunctions were characterized by several techniques, and their adsorption capacity and photodegradation activity toward tetracycline (TC) under 19 W visible LEDs illumination were investigated. The capacity of pure BI, BW and BI/BW heterojunctions for adsorbing TC ranged from 14 to 68 mg/g; among the heterojunctions, Ag/1BI/1BW showed the highest TC adsorption capacity, 35 mg/g. Moreover, the photocatalytic tests revealed that the Ag/1BI/1BW exhibited the highest catalytic performance, achieving a TC percentage degradation of 81 % within 120 min. The low nominal power consumption of the LED-based photoreactor (0.0475 kWh) was significantly lower than that reported in the literature for using Xe or Hg lamps. In addition, catalyst dosage, initial TC concentration, and solution pH were investigated, demonstrating that they play important role in TC photodegradation. Scavenger assays determined that the degradation of TC using Ag/1BI/1BW proceeds mainly via superoxide radicals and holes, which agrees with the carrier transfer mechanism postulated for this heterojunction. TOC analysis revealed that the efficiency of Ag/1BI/1BW was 63 %, and reuse tests confirmed its high performance even after three cycles. This research provides new insights into the design of high-performance heterojunctions for water treatment.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 51229-51242"},"PeriodicalIF":5.1,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}