Journal of Alloys and Compounds最新文献

{"title":"Near-infrared nonlinear WLEDs with high stability through atomic-level regulation and photosensitive resin encapsulating by 3D printing","authors":"Jiaqi Yu, Ke Li, Zhenghui Tian, Yang Qu, Lingrong Meng, Guofeng Wang","doi":"10.1016/j.jallcom.2024.177643","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177643","url":null,"abstract":"Upconversion luminescence (UCL) is a nonlinear optical phenomenon where long wavelength radiation is converted to shorter wavelength via a two-photon or multi-photon mechanism. The construction of near-infrared nonlinear WLEDs can achieve effective utilization of sunlight. This work starts with \"functional Motifs\" and regulates the nonlinear luminescent materials at the molecular level by combining DFT calculations and high-throughput techniques. As expected, the optimized geometric structures, band structures, and density of states of Ba₂YbF₇:Ln³⁺ were successfully obtained by assembling [BaBr₄] and [LnBr₄] functional Motifs. Subsequently, Ba₂YbF₇:Ln³⁺ single phosphor was prepared and further encapsulated into resin to achieve highly stable upconversion white light using 3D printing technology. After being placed for 8 months, the luminescence intensity and spectral shape of the resin coated sample remain unchanged. The color coordinates of the WLED device constructed with Ba₂YbF₇:Tm³⁺/Er³⁺ single fluorescent powder is (0.3086, 0.3163) and the related color temperature (CCT) is 6863<!-- --> <!-- -->K. The optimized material has a maximum color rendering index of 83. This work provides new insights and ideas for improving the luminescence stability of upconversion WLED using 3D printing technology.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"197 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142670903","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":"Multifunctional organic molecule with synergistic modified SnO2 for efficient perovskite solar cells","authors":"Qian Zhang, Guoming Li, Zhu Ma, Yi Chen, Zhuowei Du, Wei You, Junbo Yang, Yixian Li, Hao Du, Zhuo Lv, Dengqian Xiang, Bo Chen, Hong Yu, Maozhu Mao, Cheng Huang, Yan Xiang, Jian Yu, Yaohua Mai, Kuan Sun, Ningqiang Xuan, Kai Yue","doi":"10.1016/j.jallcom.2024.177653","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177653","url":null,"abstract":"SnO₂ stands as a prominently employed material as electron transport layer (ETL) for perovskite solar cells (PSCs). Nevertheless, SnO₂ films prepared at low temperatures are accompanied by defects that will influent the transport of carriers at the interface, misalignment of energy levels, and the quality of thin perovskite film formation. Here, we introduce 4-aminobenzoic acid ethyl ester (4-AN), characterized by its carbonyl (C=O) and amino (-NH₂) groups, as a synergistic defect passivation agent on the surfaces of SnO₂ and perovskite films. This approach aims to enhance the electron transport properties of SnO₂. By optimizing the energy alignment between SnO₂ and perovskite, 4-AN facilitates more efficient extraction of interfacial carriers, while also promoting the crystalline quality of perovskite films and suppressing carrier recombination at the interface. The long alkyl chains at the end play an important role in relieving the interfacial contact and help to enhance the SnO₂/perovskite interfacial connection. Compared with pristine SnO₂, the PSCs based on 4-AN modified SnO₂ obtained an optimal efficiency of 21.83%, while the devices maintained 90% and 83% of their initial PCE after storage for 1000<!-- --> <!-- -->h in an N₂ environment and humidity of 30-50%. This work provides valid insights for the development of novel interface modification materials.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"11 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142671003","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":"Surface engineering with bifunctional layer in LiNi0.5Co0.2Mn0.3O2 for high-performance cathode materials of lithium-ion batteries","authors":"Yinghao Zhao, Pongsakorn Kantichaimongkol, Chengwu Yang, Zhiqiang Dai, Dong Xu, Xueqing Zhang, Manunya Okhawilai, Prasit Pattananuwat, Xinyu Zhang, Jiaqian Qin","doi":"10.1016/j.jallcom.2024.177661","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177661","url":null,"abstract":"Implementing a stable interfacial architecture with augmented conductivity emerges as a pivotal approach for bolstering the stability of LiNi_0.5Co_0.2Mn_0.3O₂ (NCM523) and facilitating expedited Li⁺ transport. To augment efficiency and foster compatibility with industrial processes, a novel one-step, high-temperature modification technique is introduced for the fabrication of a dual-layer LiCoO₂ &amp; Li₃BO₃ (LCO/LBO) coating on the NCM523. This is achieved through the utilization of nano-CoB particles (nCoB) as a medium to capture LiOH impurities. The special coating architecture not only propels Li⁺ diffusion at the interphase but also mitigates acid-induced corrosion, thereby preserving the structural integrity of cathode material throughout its operational lifecycle. Owing to this innovative coating, the electrochemical attributes of NCM523 witness significant improvement, demonstrated by a remarkable 98.2% capacity retention following 100 cycles at 1<!-- --> <!-- -->C, and a sustained 75.9% capacity retention after 300 cycles, a stark contrast to the 29.2% observed with uncoated NCM523. This investigation validates the LCO/LBO coating paradigm as a means to synergistically enhance Li⁺ translocation across the electrical double layer while countering cathodic structural erosion, offering fresh perspectives in the domain of NCM523 cathode surface enhancement.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"99 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142670952","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":"Designing of Eu2+-activated single-phase white-emitting phosphor through modifying cationic sites for high color rendering full-spectrum illumination","authors":"Nan Yang, Zhuo Li, Junhui Liang, Weijie Huang, Zhibin Ye, Wen He, Yexiang Tong, Jianxin Shi","doi":"10.1016/j.jallcom.2024.177667","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177667","url":null,"abstract":"Single-phase full-spectrum white-emitting phosphors with individual activator are of great significance for avoiding unnecessary energy loss and realizing high luminescence efficiency. Herein, a novel Na₂Ca₁₇Al₂(PO₄)₁₄:Eu²⁺ phosphor is designed and the strategy of cation substitution is functioned in regulating the luminescence. The Na₂Ca₁₇Al₂(PO₄)₁₄:Eu²⁺ phosphor could realize basic full-spectrum emission under the excitation of 335<!-- --> <!-- -->nm, but the lack of red-light component and the CIE color coordinates of (0.2291, 0.2302) can not meet the requirements for white light-emitting diodes (WLEDs). With partial or even full replacement of Na⁺ in the host with Li⁺ ions, the red-light component in the emission is efficiently improved and each emitting color reaches the appropriate proportion, achieving the cold white light at (0.3330, 0.3179). By further regulating the excitation wavelength, Li₂Ca₁₇Al₂(PO₄)₁₄:Eu²⁺ phosphor finally exhibits bright warm white emission with the color coordinates of (0.3551, 0.3448) upon 360<!-- --> <!-- -->nm excitation and the internal quantum efficiency is 33.2%. It is due to the substitution of Na⁺ by Li⁺ ions that contributes to the redistribution of Eu²⁺ in different crystal sites and regulates the photoluminescence of this phosphor, further realizing the full-spectrum white light emission. The fabricated two WLED devices by this material with near ultraviolet chips show outstanding color rendering index of 92.7 and 96.8, respectively, revealing that this material has a promising prospect in the field of full-spectrum illumination.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"40 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142670953","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":"Hierarchically porous N-doped dual-carbon coupled Co5.47N composite with tunable electromagnetic shielding and absorption properties","authors":"Zhen Qin, Yumei Ren, Shuai Yang, Peichen Li, Zhongyi Wang, Desheng Feng, Dongwei Xu, Yanjun Zheng, Kun Xu, Xiaoqin Guo, Biao Zhao","doi":"10.1016/j.jallcom.2024.177670","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177670","url":null,"abstract":"Electromagnetic interference (EMI) and pollution issues are becoming increasingly prominent. It is of great scientific significance and practical value to develop lightweight, efficient and tunable electromagnetic wave (EMW) attenuating materials. Herein, a three-dimensional (3D) hierarchical porous N-doped dual-carbon (glucose-derived carbon and reduced graphene oxide (rGO)) coupled Co_5.47N (Co_5.47N@HNCF) composite was reasonably designed and prepared via simple and low-cost methods, which exhibited excellent electromagnetic attenuation properties. By appropriately adjusting the filling amount of Co_5.47N@HNCF, tunable EMI shielding and EMW absorption properties could be achieved. At high filling amount (40<!-- --> <!-- -->wt%), the highly conductive Co_5.47N@HNCF composite had excellent EMI shielding effectiveness (EMI SE) in X-band (8.2~12.4<!-- --> <!-- -->GHz), with a maximum total electromagnetic shielding effectiveness (SE_T) of 81.6<!-- --> <!-- -->dB (average EMI SE of 76.8<!-- --> <!-- -->dB) and a thickness of 2<!-- --> <!-- -->mm. Particularly, when the thickness is only 0.8<!-- --> <!-- -->mm, the SE_T could reach 32<!-- --> <!-- -->dB. While at low filling amount (15<!-- --> <!-- -->wt%), Co_5.47N@HNCF composite with suitable impedance matching showed remarkable EMW absorption performance, exhibiting high values of reflection loss (RL) of -45.86<!-- --> <!-- -->dB in 2~18<!-- --> <!-- -->GHz. The high-performance EMW attenuation in Co_5.47N@HNCF could be ascribed to the construction of stable 3D conductive dual-carbon frameworks and Co_5.47N nanoparticles with abundant N vacancies. The dielectric and magnetic components of the system acted synergistically, possessing abundant heterogeneous interfaces and defects, which could induce various loss modes such as multiple reflections/scattering, conductive loss, magnetic loss and polarization loss to synergistically dissipate EMW. Therefore, this study endeavors to give an effective strategy for the preparation of low-cost, lightweight, and highly efficient tunable EMW attenuation materials.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"55 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142670955","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":"Greatly Enhanced Humidity Sensing Performances with Ultra Low Hysteresis Error in Giant Permittivity TiO2 Ceramics Co–doped with Sc3+ and Ta5+ Ions","authors":"Kannika Phuion, Wattana Tuichai, Jurimart Wongsricha, Kaniknun Sreejivungsa, Noppakorn Thanamoon, Nutthakritta Phromviyo, Wirat Jarernboon, Prasit Thongbai","doi":"10.1016/j.jallcom.2024.177639","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177639","url":null,"abstract":"This study investigates the dielectric and humidity sensing properties of Sc_yTa_0.025Ti_0.975-yO₂ (<em>y</em>%ScTTO) ceramics with varying Sc³⁺ concentrations (1%, 2.5%, and 5%). The ceramics were synthesized using a solid<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>state reaction method. X<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>ray diffraction analysis confirmed the presence of the main rutile TiO₂ phase without any impurity phases. The ceramics exhibited a high<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>density microstructure with a relative density exceeding 92%. The mean grain size increased with higher Sc³⁺ doping concentrations. Elemental mapping showed homogeneous dispersion in the 1%ScTTO and 2.5%ScTTO samples, while the 5%ScTTO sample exhibited segregation of a Sc<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>rich phase along the grain boundaries. All samples demonstrated a giant dielectric constant of 10³–10⁵, which decreased as the Sc³⁺ concentration increased. Notably, the 1%ScTTO and 2.5%ScTTO samples displayed significant humidity sensitivity. The capacitance of these samples increased by 100% and 1700%, respectively, as the relative humidity increased from 30 to 90%. Remarkably, the 2.5%ScTTO sample exhibited minimal hysteresis error, measured at 1.09% at 1<!-- --> <!-- -->kHz. Furthermore, these samples showed very fast response and recovery times, ∼1 and 0.15<!-- --> <!-- -->min, respectively. The humidity sensing properties at 1<!-- --> <!-- -->kHz and 25 °C remained stable under a DC bias of up to 12<!-- --> <!-- -->V but showed a significant increase when the temperature was raised to 50–75 °C (without DC bias). The enhanced humidity sensing performance and giant dielectric response were attributed to the formation of defects and the grain boundary effect.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"2 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142670960","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":"Ultrasensitive NO2 Gas Detection using ALD-Grown ZnO-SiO2/Si Thin Film-based UV Sensors","authors":"Bhavya Padha, Zahoor Ahmed, Shankar Dutta, Akhilesh Pandey, Naresh Padha, Monika Tomar, Anjali Sharma, Isha Yadav, Sandeep Arya","doi":"10.1016/j.jallcom.2024.177673","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177673","url":null,"abstract":"In this study, nitrogen dioxide (NO₂) gas sensors based on zinc oxide-silicon (ZnO–Si) and zinc oxide-silicon dioxide-silicon (ZnO–SiO₂–Si) configurations were fabricated to study their response to ultraviolet (UV) radiation at room temperature (300<!-- --> <!-- -->K). Single and polycrystalline ZnO layers were deposited using atomic layer deposition (ALD) on silicon and silica substrates. The structure and composition of the films were studied using various characterization techniques. The current-voltage (I-V) characteristics of these sensors’ UV illumination (~365<!-- --> <!-- -->nm) have been investigated. The gas sensing performance of both configurations was analyzed with and without the UV source for varied concentrations of NO₂ gas. Exposure to UV light significantly improved the recovery times of the sensors. Specifically, the recovery time for the Si-based sensor decreased from 1578<!-- --> <!-- -->seconds to 24<!-- --> <!-- -->seconds, while for the SiO₂-based sensor, it reduced from 540<!-- --> <!-- -->seconds to 5<!-- --> <!-- -->seconds. The response time of ZnO–Si was found to be 2<!-- --> <!-- -->seconds and ZnO–SiO₂–Si to be 1<!-- --> <!-- -->second. Under irradiation, the sensitivity factor increased from 8.29 × 10⁷ to 5.79 × 10^8% ppm^-1 for the ZnO–SiO₂–Si sensor. It reached a maximum value of 9.12 × 10¹¹% ppm^-1, which is extremely high compared to similar devices.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"43 2 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673392","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":"Synthesis of Fe₃O₄/FeS₂ composites via MOF-templated sulfurization for high-performance hybrid supercapacitors","authors":"Huaxu Song, Mengke Wu, Xiaojing Tang, Junqi Liang, Yuanhao Zhang, Yishun Xie, Qihao Tang, Lin Qin, Xin Fan","doi":"10.1016/j.jallcom.2024.177658","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177658","url":null,"abstract":"The development of advanced anode materials for supercapacitors is crucial for driving innovation in the field of new energy technologies. Although iron-based materials show promise, their electrical conductivity and cyclic stability remain challenges. In this study, Fe₃O₄/FeS₂ composites were synthesized using a sacrificial MOF template and a solid-state sulfurization process. The composite retained the morphology of Fe-MOF, with numerous nanoscale particles formed through heterogeneous sulfurization. The SMFO-2 composite exhibited a specific capacity of 208.5 mAh g^-1 at a current density of 1<!-- --> <!-- -->A<!-- --> <!-- -->g⁻¹. In a hybrid supercapacitor (HSC) constructed with SMFO-2 as the anode and super-electric activated carbon (AC) as the cathode, the device demonstrated a capacity retention rate of 78.6% after 10,000 cycles at 2<!-- --> <!-- -->A<!-- --> <!-- -->g⁻¹. Furthermore, the HSC achieved an optimal energy density of 28.8<!-- --> <!-- -->Wh<!-- --> <!-- -->kg⁻¹ with a power density of 375<!-- --> <!-- -->W<!-- --> <!-- -->kg⁻¹, successfully powering a small bulb, highlighting its strong potential for practical applications.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"38 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142670959","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":"Study on the interfacial microstructure and fracture mechanism of Al/Mg composites with Zn interlayer by cyclic hot pressing","authors":"Chen Liu, Yongchang Zhu, Ye Ma, Zhiyang Gao, Dan Ye, Qirong Li","doi":"10.1016/j.jallcom.2024.177650","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177650","url":null,"abstract":"Using the cyclic hot pressing method, Al/Mg laminated composites with a Zn interlayer were prepared, and the effect of temperature on the composite interfaces was studied. At 420℃, the composites interface is composed of HCP-Zn solid solution near the Al side and Laves phase near the Mg side. At 460℃, FCC-Al phase and τ-phase appear near the Al side, while τ-phase and HCP-Mg solid solution appear near the Mg side. Above 500℃, the interface is mainly composed of Al-Mg intermetallic compounds. The change of solubility during the formation of the composite causes the polarization of solute atoms in Zn and Al solid solutions, resulting in defects, such as increased grain boundary stress and lattice distortion. These defects lead to failure of the interface near the aluminum side of the composites. Composites prepared at 420℃ show the best ductile fracture properties. With the increase of preparation temperature, the fracture mode is transformed into brittle fracture induced by β-phase.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"34 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142670958","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":"B-derived charge carrier transfer in SnO2/g-C3N4 heterostructures towards enhanced photocatalytic H2O2 production and tetracycline removal","authors":"Peihao Song, Ping Yang, Xiao Zhang","doi":"10.1016/j.jallcom.2024.177659","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177659","url":null,"abstract":"To improve photocatalytic hydrogen peroxide (H₂O₂) generation and antibiotic degradation, SnO₂ nanocrystals were embedded in boron-doped graphitic carbon nitride (g-C₃N₄) nanosheets. Superior thin B-g-C₃N₄ nanosheets were created via two-step thermal polymerization at 550 and 700 °C in Ar atmosphere. SnO₂ nanocrystals less than 5<!-- --> <!-- -->nm were homogeneously embedded in nanosheets by mechano-chemical pre-reaction and heat-treatment at 400 °C in air condition to form SnO₂/B-g-C₃N₄ composites. The mechano-chemical pre-treatment and B doping were crucial for the homogeneous distribution of SnO₂ nanocrystals. The formation of heterostructure, well-developed interfaces, introduced B components, and decent conductivity of SnO₂ components resulted in efficient charge separation/transfer during photocatalysis. B-doping played key role in enhancing photoinduced charge separation/transfer to enhance H₂O₂ generation and tetracycline degradation. After embedding SnO₂ nanocrystals in B-g-C₃N₄, the photocatalytic activity was drastically enhanced. A SnO₂/B-g-C₃N₄ sample prepared using optimized conditions revealed a H₂O₂ production rate of 9287.0<!-- --> <!-- -->μM<!-- --> <!-- -->g^-1 h^-1 which was 3.8 times of that of g-C₃N₄ (2449.8<!-- --> <!-- -->μM<!-- --> <!-- -->g^-1 h^-1). The photocatalytic tetracycline degradation rate constant of the SnO₂/B-g-C₃N₄ composites was 0.018<!-- --> <!-- -->min^-1 using first-order kinetic fitting, which was 6 times of that of g-C₃N₄ (0.003<!-- --> <!-- -->min^-1). These results provide novel insight for the application of photocatalytic technology in environmental field.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"99 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142670999","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}