Pub Date : 2025-02-17DOI: 10.1016/j.apsusc.2025.162711
Yangjie Fu, Jiurui Chi, Yanling Wu, Jun Li, Meng Tan, Chunjuan Li, Hao Du, Derek Hao, Huayue Zhu, Qi Wang, Qiang Li
Constructing a robust and large built-in electric field to boost photogenerated carrier separation efficiency has been a persistent challenge in photocatalysis. Herein, a carbon-rich carbon nitride (CCN/WO3) S-scheme heterojunction was successfully developed, achieving effective charge separation through the synergistic interaction of the in-plane electric field within CCN and the interfacial electric field at the CCN/WO3 interface. The robust in-plane electric field of CCN originated from the asymmetric structure induced by carbon substitution for nitrogen atoms in g-C3N4. Additionally, a strong interfacial electric field was established through combining CCN with WO3 via a one-pot synthesis process. The CCN/WO3 heterojunction demonstrated excellent performance in bacteria inactivation and organic pollutant degradation, with antibacterial activity against E. coli 20.4 times and 4.2 times higher than those of WO3 and CN/WO3, respectively, and a photocatalytic TC degradation rate constant 5.5 times higher than that of WO3. Quantitative analysis revealed that the CCN/WO3 heterojunction achieved 96.7 % selectivity for free radical generation, significantly higher than that of g-C3N4 (40.9 %), indicating a strong preference for activating O2 through charge-carrier transfer pathways. This study demonstrates that leveraging the synergy between in-plane and interfacial electric fields offers a promising strategy to enhance charge separation in photocatalysts.
{"title":"Synergistic electric fields induced by unilateral doping modulation for enhanced organic pollutant degradation and sterilization","authors":"Yangjie Fu, Jiurui Chi, Yanling Wu, Jun Li, Meng Tan, Chunjuan Li, Hao Du, Derek Hao, Huayue Zhu, Qi Wang, Qiang Li","doi":"10.1016/j.apsusc.2025.162711","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.162711","url":null,"abstract":"Constructing a robust and large built-in electric field to boost photogenerated carrier separation efficiency has been a persistent challenge in photocatalysis. Herein, a carbon-rich carbon nitride (CCN/WO<sub>3</sub>) S-scheme heterojunction was successfully developed, achieving effective charge separation through the synergistic interaction of the in-plane electric field within CCN and the interfacial electric field at the CCN/WO<sub>3</sub> interface. The robust in-plane electric field of CCN originated from the asymmetric structure induced by carbon substitution for nitrogen atoms in g-C<sub>3</sub>N<sub>4</sub>. Additionally, a strong interfacial electric field was established through combining CCN with WO<sub>3</sub> via a one-pot synthesis process. The CCN/WO<sub>3</sub> heterojunction demonstrated excellent performance in bacteria inactivation and organic pollutant degradation, with antibacterial activity against <em>E. coli</em> 20.4 times and 4.2 times higher than those of WO<sub>3</sub> and CN/WO<sub>3</sub>, respectively, and a photocatalytic TC degradation rate constant 5.5 times higher than that of WO<sub>3</sub>. Quantitative analysis revealed that the CCN/WO<sub>3</sub> heterojunction achieved 96.7 % selectivity for free radical generation, significantly higher than that of g-C<sub>3</sub>N<sub>4</sub> (40.9 %), indicating a strong preference for activating O<sub>2</sub> through charge-carrier transfer pathways. This study demonstrates that leveraging the synergy between in-plane and interfacial electric fields offers a promising strategy to enhance charge separation in photocatalysts.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"88 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427120","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}
Pub Date : 2025-02-17DOI: 10.1016/j.apsusc.2025.162716
Huiqin Zhu, Mingming Hou, Weiwei Qian, Ruihao Sun, Deshuai Liu, Chi Zhang, Feng Huo
Homogeneous porous polysilane-coated sodium ion layered oxide cathode materials (PSi@NFM111) have been prepared by a one-step simple impregnation method. The uniform polysilane coating can effectively inhibit the dissolution of transition metal ions, enhance the mechanical strength of the cathode materials, and alleviate the problems such as materials cracking and pulverization during cycling. In addition, the polysilane protective layer alleviates the oxidative decomposition of the electrolyte on the cathode side, where the presence of Si-O bond can consume the by-product HF of the electrolyte and avoid its direct attack on the cathode, resulting in battery performance attenuation. The optimized uniform porous coating layer is conducive to the infiltration of electrolyte and migration of sodium ions, because the coating formed by the incomplete polymerization of tetraethyl orthosilicate (TEOS) has a rich porous structure, which improves the active material utilization and rate performance of the cathode. And after 200 cycles at 0.5C, the capacity retention rate can reach 90.7%. At the rate of 5C, the discharge capacity is approximately 10% higher than that of uncoated NFM111.
{"title":"The porous polysilane-coated NFM111 cathode prepared by in-situ polymerization of ethyl orthosilicate with improved rate and cycle stability for Na ion battery","authors":"Huiqin Zhu, Mingming Hou, Weiwei Qian, Ruihao Sun, Deshuai Liu, Chi Zhang, Feng Huo","doi":"10.1016/j.apsusc.2025.162716","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.162716","url":null,"abstract":"Homogeneous porous polysilane-coated sodium ion layered oxide cathode materials (PSi@NFM111) have been prepared by a one-step simple impregnation method. The uniform polysilane coating can effectively inhibit the dissolution of transition metal ions, enhance the mechanical strength of the cathode materials, and alleviate the problems such as materials cracking and pulverization during cycling. In addition, the polysilane protective layer alleviates the oxidative decomposition of the electrolyte on the cathode side, where the presence of Si-O bond can consume the by-product HF of the electrolyte and avoid its direct attack on the cathode, resulting in battery performance attenuation. The optimized uniform porous coating layer is conducive to the infiltration of electrolyte and migration of sodium ions, because the coating formed by the incomplete polymerization of tetraethyl orthosilicate (TEOS) has a rich porous structure, which improves the active material utilization and rate performance of the cathode. And after 200 cycles at 0.5C, the capacity retention rate can reach 90.7%. At the rate of 5C, the discharge capacity is approximately 10% higher than that of uncoated NFM111.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"13 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143435052","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}
Pub Date : 2025-02-17DOI: 10.1016/j.apsusc.2025.162719
Kesong Wang , Adam Paxson , Thomas I. Valdez , Ahmet G. Erlat , Ping-Che Lee , Seonguk Yun , Andrew C. Kummel , Prabhakar R. Bandaru
Titanium (Ti), widely used in proton exchange membrane (PEM) based water electrolyzers, is prone to oxidation and related corrosion given the high operating voltages (>2 V) and low pH (⩽5) conditions. Here, it is shown that a thin layer of ALD (atomic layer deposition) TiOx can serve as a barrier for drastically reducing the corrosion of Ti. The robustness of the coatings was evaluated at high potentials (2.4 V vs. RHE – reversible hydrogen electrode), in low pH and at elevated temperature (80 °C). A low TiOx dissolution rate (<∼5 nm year−1) along with five orders of magnitude enhanced current density, was observed for the ALD TiOx coated Ti compared to uncoated Ti.
{"title":"Improved corrosion resistance and electrical characteristics of titanium, with atomic layer deposited (ALD) TiOx coating","authors":"Kesong Wang , Adam Paxson , Thomas I. Valdez , Ahmet G. Erlat , Ping-Che Lee , Seonguk Yun , Andrew C. Kummel , Prabhakar R. Bandaru","doi":"10.1016/j.apsusc.2025.162719","DOIUrl":"10.1016/j.apsusc.2025.162719","url":null,"abstract":"<div><div>Titanium (Ti), widely used in proton exchange membrane (PEM) based water electrolyzers, is prone to oxidation and related corrosion given the high operating voltages (>2 V) and low pH (⩽5) conditions. Here, it is shown that a thin layer of ALD (atomic layer deposition) TiO<sub>x</sub> can serve as a barrier for drastically reducing the corrosion of Ti. The robustness of the coatings was evaluated at high potentials (2.4 V <em>vs.</em> RHE – reversible hydrogen electrode), in low pH and at elevated temperature (80 °C). A low TiO<sub>x</sub> dissolution rate (<∼5 nm year<sup>−1</sup>) along with five orders of magnitude enhanced current density, was observed for the ALD TiO<sub>x</sub> coated Ti compared to uncoated Ti.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"692 ","pages":"Article 162719"},"PeriodicalIF":6.3,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143435498","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}
Pub Date : 2025-02-16DOI: 10.1016/j.apsusc.2025.162703
Hongyan Li, Jie Zhao, Sisi Pan, Yuwen Deng, Yuan Li, Kai Li
Nitrogen-doped carbon-based catalysts have been widely utilized in the selective catalytic oxidation of hydrogen sulfide, but there are some challenges in practical applications, such as the stability and water resistance of the catalysts. This study has synthesized a series of metal-free nitrogen-doped mesoporous carbon (CN-x-T) catalysts with a large specific surface area, high N content, and many defects for the selective catalytic oxidation of H2S by polymerization strategy and pyrolysis without templates. The nitrogen basic sites of CN-x-T facilitate the dissociation of H2S and the activation of O2, while the mesoporous structure enables efficient mass transfer within and outside the catalyst. The prepared NC-4-800 catalyst exhibits excellent catalytic performance, achieving a conversion of 100 % and a sulfur selectivity of 85 % at 150 °C. Furthermore, the catalyst demonstrates excellent stability and water where the catalysts show remarkable stability over 150 h. The activity could remain stable even when 50 % water was introduced into the system.
{"title":"Template-free fabrication of nitrogen-doped mesoporous carbon catalysts with high water resistance for selective catalytic oxidation of H2S","authors":"Hongyan Li, Jie Zhao, Sisi Pan, Yuwen Deng, Yuan Li, Kai Li","doi":"10.1016/j.apsusc.2025.162703","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.162703","url":null,"abstract":"Nitrogen-doped carbon-based catalysts have been<!-- --> <!-- -->widely utilized in the selective catalytic oxidation of hydrogen sulfide, but there are some challenges in practical applications, such as the stability and water resistance of the catalysts.<!-- --> <!-- -->This study has synthesized a series of metal-free nitrogen-doped mesoporous carbon (CN-x-T) catalysts with a large specific surface area, high N content, and many defects for the selective catalytic oxidation of H<sub>2</sub>S by polymerization strategy and pyrolysis without templates. The nitrogen basic sites of CN-x-T facilitate the dissociation of H<sub>2</sub>S and the activation of O<sub>2</sub>, while the mesoporous structure enables efficient mass transfer within and outside the catalyst. The prepared NC-4-800 catalyst exhibits excellent catalytic performance, achieving a conversion of 100 % and a sulfur selectivity of 85 % at 150 °C. Furthermore, the catalyst demonstrates excellent stability and water where the catalysts show remarkable stability over 150 h. The activity could remain stable even when 50 % water was introduced into the system.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"66 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417284","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}
A series of S-scheme heterojunctions, XCN@MoO3 (XCN@M, X = Cl, Br, I), were synthesized via a simple thermal polymerization, and the effect of halogen doping on construction of S-scheme heterojunctions was systematically explored. The ICN@M heterojunction showed exceptional photocatalytic performance, achieving 100 % degradation of 50 mg/L RhB in 90 min, 40.37 times and 2.34 times higher than pure g-C3N4 and CN@M, respectively. Notably, ICN@M outperformed CN@M and some other photocatalysts reported. DFT result revealed halogen doping reduced the work function of CN, proved the maximum work function difference of ICN@M and the formation of the strongest built-in electric field between the surface of MoO3 with an electron-rich region and the surface of ICN with a hole-rich region, thus facilitating electron transfer at the heterojunction interface, reducing recombination of photogenerated carriers and promoting the catalytic performance. Fukui function and frontier orbital theory identified a possible degradation pathway of RhB dominated by ∙O2– and 1O2 and the toxicity of final products during the photocatalysis degradation of RhB was evaluated. This work highlighted the importance of work function differences in designing photocatalyst heterostructures and offered a new option for environmental treatment.
{"title":"Performance and mechanism study on the degradation of RhB by I-g-C3N4@MoO3 heterojunction","authors":"Hao Yang, Li Han, Dongrui Hou, Yongchang Liu, Shuaijun Huang, Zirui Peng, Zirui Yang, Tianliang Lu, Xiaoqin Si, Xin liu, Jinrong Li, Jianfeng Wang","doi":"10.1016/j.apsusc.2025.162704","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.162704","url":null,"abstract":"A series of S-scheme heterojunctions, XCN@MoO<sub>3</sub> (XCN@M, X = Cl, Br, I), were synthesized via a simple thermal polymerization, and the effect of halogen doping on construction of S-scheme heterojunctions was systematically explored. The ICN@M heterojunction showed exceptional photocatalytic performance, achieving 100 % degradation of 50 mg/L RhB in 90 min, 40.37 times and 2.34 times higher than pure g-C<sub>3</sub>N<sub>4</sub> and CN@M, respectively. Notably, ICN@M outperformed CN@M and some other photocatalysts reported. DFT result revealed halogen doping reduced the work function of CN, proved the maximum work function difference of ICN@M and the formation of the strongest built-in electric field between the surface of MoO<sub>3</sub> with an electron-rich region and the surface of ICN with a hole-rich region, thus facilitating electron transfer at the heterojunction interface, reducing recombination of photogenerated carriers and promoting the catalytic performance. Fukui function and frontier orbital theory identified a possible degradation pathway of RhB dominated by ∙O<sub>2</sub><sup>–</sup> and <sup>1</sup>O<sub>2</sub> and the toxicity of final products during the photocatalysis degradation of RhB was evaluated. This work highlighted the importance of work function differences in designing photocatalyst heterostructures and offered a new option for environmental treatment.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"62 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417287","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}
Pub Date : 2025-02-16DOI: 10.1016/j.apsusc.2025.162702
Sze-Mun Lam , Zi-Jun Yong , Jin-Chung Sin , Abdul Rahman Mohamed , Honghu Zeng , Haixaing Li , Hua Lin , Liangliang Huang , Haitao Huang , Liwei Xu , Jun-Wei Lim , Kun Dong
Devising an effective and well-contacted multi-component electrode in the photocatalytic fuel cell (PFC) system remained a towering challenge. Herein, ZnO nanorod array (NR) layer on the fluorine-doped tin oxide (FTO) was utilized as a substrate for the fabrication of NiFe2O4/Bi2WO6/ZnO NR photoanode, which was then assembled into a sunlight responsive PFC for electricity generation during the sewage effluent treatment. Material tests disclosed that NiFe2O4 and Bi2WO6 were evenly dispersed on the highly ordered one-dimensional ZnO nanorods, providing excellent optical and electrochemical traits for photoelectrochemical activity. This composite photoanode formed dual-S scheme heterointerfaces between NiFe2O4-Bi2WO6 and Bi2WO6-ZnO NR, creating directed internal electric fields (IEFs). These IEFs promoted the migration of photoexcited electrons to the surface of composite, boosting charge carrier segregation efficiency of the carriers and facilitating the participation of plentiful active species in the mineralization of sewage effluent. As a result, the NiFe2O4/Bi2WO6/ZnO NR PFC achieved a maximum power density of 7.364 µW cm−2 under sunlight with a chemical oxygen demand (COD) removal efficiency of 100 %, representing increase of 4.9 times and 2.7 times over the pristine ZnO NR, respectively. Additionally, the toxicological investigations testified that the detoxified sewage effluent unveiled had no hazardous effects on zebrafish species following treatment with the NiFe2O4/Bi2WO6/ZnO NR PFC.
{"title":"Improved photoelectrochemical activity of NiFe2O4/Bi2WO6 photoanode by ZnO nanorod array layer for bifunctional photocatalytic fuel cell","authors":"Sze-Mun Lam , Zi-Jun Yong , Jin-Chung Sin , Abdul Rahman Mohamed , Honghu Zeng , Haixaing Li , Hua Lin , Liangliang Huang , Haitao Huang , Liwei Xu , Jun-Wei Lim , Kun Dong","doi":"10.1016/j.apsusc.2025.162702","DOIUrl":"10.1016/j.apsusc.2025.162702","url":null,"abstract":"<div><div>Devising an effective and well-contacted multi-component electrode in the photocatalytic fuel cell (PFC) system remained a towering challenge. Herein, ZnO nanorod array (NR) layer on the fluorine-doped tin oxide (FTO) was utilized as a substrate for the fabrication of NiFe<sub>2</sub>O<sub>4</sub>/Bi<sub>2</sub>WO<sub>6</sub>/ZnO NR photoanode, which was then assembled into a sunlight responsive PFC for electricity generation during the sewage effluent treatment. Material tests disclosed that NiFe<sub>2</sub>O<sub>4</sub> and Bi<sub>2</sub>WO<sub>6</sub> were evenly dispersed on the highly ordered one-dimensional ZnO nanorods, providing excellent optical and electrochemical traits for photoelectrochemical activity. This composite photoanode formed dual-S scheme heterointerfaces between NiFe<sub>2</sub>O<sub>4</sub>-Bi<sub>2</sub>WO<sub>6</sub> and Bi<sub>2</sub>WO<sub>6</sub>-ZnO NR, creating directed internal electric fields (IEFs). These IEFs promoted the migration of photoexcited electrons to the surface of composite, boosting charge carrier segregation efficiency of the carriers and facilitating the participation of plentiful active species in the mineralization of sewage effluent. As a result, the NiFe<sub>2</sub>O<sub>4</sub>/Bi<sub>2</sub>WO<sub>6</sub>/ZnO NR PFC achieved a maximum power density of 7.364 µW cm<sup>−2</sup> under sunlight with a chemical oxygen demand (COD) removal efficiency of 100 %, representing increase of 4.9 times and 2.7 times over the pristine ZnO NR, respectively. Additionally, the toxicological investigations testified that the detoxified sewage effluent unveiled had no hazardous effects on zebrafish species following treatment with the NiFe<sub>2</sub>O<sub>4</sub>/Bi<sub>2</sub>WO<sub>6</sub>/ZnO NR PFC.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"691 ","pages":"Article 162702"},"PeriodicalIF":6.3,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417285","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}
Pub Date : 2025-02-16DOI: 10.1016/j.apsusc.2025.162705
Muhammad Irfan Jahanger , Sumair Ahmed Soomro , Maaz Ullah Khan , Yiwang Bao , Man Jiang , Longsheng Chu , Qingguo Feng , Chunfeng Hu
In this work, ultrathin, strong, and highly flexible Ti3C2Tx MXene-PVA (Polyvinyl alcohol) composite films with varying Ti3C2Tx MXene contents of 20, 40, 60, and 80 wt% were prepared via a solution casting method to evaluate their mechanical and electromagnetic interference shielding properties. The Ti3C2Tx MXene-PVA composite films showed optimal mechanical properties with a Ti3C2Tx MXene content of 60 wt%. At this composition, it achieved high tensile strength of 56.0 MPa, high fracture strain of 2.2%, and high Young’s modulus of 6.7 GPa. Additionally, the electromagnetic interference shielding efficiency was improved with increasing Ti3C2Tx MXene content. At the loading of 80 wt% Ti3C2Tx MXene, the electromagnetic interference shielding effectiveness reached the highest value of 34.80 dB.
{"title":"Microstructure, mechanical and electromagnetic interference shielding properties of free-standing Ti3C2Tx-PVA films","authors":"Muhammad Irfan Jahanger , Sumair Ahmed Soomro , Maaz Ullah Khan , Yiwang Bao , Man Jiang , Longsheng Chu , Qingguo Feng , Chunfeng Hu","doi":"10.1016/j.apsusc.2025.162705","DOIUrl":"10.1016/j.apsusc.2025.162705","url":null,"abstract":"<div><div>In this work, ultrathin, strong, and highly flexible Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene-PVA (Polyvinyl alcohol) composite films with varying Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene contents of 20, 40, 60, and 80 wt% were prepared via a solution casting method to evaluate their mechanical and electromagnetic interference shielding properties. The Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene-PVA composite films showed optimal mechanical properties with a Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene content of 60 wt%. At this composition, it achieved high tensile strength of 56.0 MPa, high fracture strain of 2.2%, and high Young’s modulus of 6.7 GPa. Additionally, the electromagnetic interference shielding efficiency was improved with increasing Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene content. At the loading of 80 wt% Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene, the electromagnetic interference shielding effectiveness reached the highest value of 34.80 dB.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"692 ","pages":"Article 162705"},"PeriodicalIF":6.3,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427100","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}
Pub Date : 2025-02-16DOI: 10.1016/j.apsusc.2025.162666
Shiye Lou , Yuanyuan Zhang , Jingyi Hou , YuAng Qian , Yiwen Shi , Yuan Zhang , Lili Liu , Wei Yan , DongEn Zhang , Linxing Shi
Developing efficient photocatalysts is an important strategy to improve wastewater efficiency. In this work, Cu-Sn-S ternary chalcogenides including Cu2SnS3 and Cu3SnS4 are fabricated by controlling the type of reaction solvents and the ratios of raw materials, which are further modified by sulfur vacancy after alkali-etching treatment. The existence of sulfur vacancy produces Cu(I)/Cu(II) and Sn(II)/Sn(IV) dual-redox-pairs in chalcogenides, which could accelerate the conversion of O2 to highly active ·O2–. Moreover, heterojunction construction of chalcogenides with Bi2WO6 further accelerate migration of charge carriers, leading to enhanced wastewater treatment efficiency. Generally, photocatalytic activities are evaluated in laboratory with xenon lamp (140 ∼ 150 mW/cm2) as simulated sunlight. Herein, photodegradation measurements are carried out in outdoor scene with real sunlight as illumination source. As a result, the targeted Ca-alg/Sv-Cu2SnS3/Bi2WO6 catalyst exhibits the excellent tetracycline elimination performances whether in sunny (58.24 ∼ 64.85 mW/cm2) or cloudy (33.56 ∼ 63.86 mW/cm2), even overcast (11.19 ∼ 18.12 mW/cm2) weathers, with elimination efficiencies of 61.05 %, 57.49 %, and 44.33 % after 150 min of sunlight irradiation. Furthermore, the encapsulations of calcium-alginate microspheres toward catalyst powders cause the easy recycle and reuse after reaction, which reduces cost and causes no secondary pollution, contributing to promising practical applications.
{"title":"Calcium alginate microspheres encapsulated recyclable photocatalysts with dual-redox-pairs for efficient wastewater purification","authors":"Shiye Lou , Yuanyuan Zhang , Jingyi Hou , YuAng Qian , Yiwen Shi , Yuan Zhang , Lili Liu , Wei Yan , DongEn Zhang , Linxing Shi","doi":"10.1016/j.apsusc.2025.162666","DOIUrl":"10.1016/j.apsusc.2025.162666","url":null,"abstract":"<div><div>Developing efficient photocatalysts is an important strategy to improve wastewater efficiency. In this work, Cu-Sn-S ternary chalcogenides including Cu<sub>2</sub>SnS<sub>3</sub> and Cu<sub>3</sub>SnS<sub>4</sub> are fabricated by controlling the type of reaction solvents and the ratios of raw materials, which are further modified by sulfur vacancy after alkali-etching treatment. The existence of sulfur vacancy produces Cu(I)/Cu(II) and Sn(II)/Sn(IV) dual-redox-pairs in chalcogenides, which could accelerate the conversion of O<sub>2</sub> to highly active ·O<sub>2</sub><sup>–</sup>. Moreover, heterojunction construction of chalcogenides with Bi<sub>2</sub>WO<sub>6</sub> further accelerate migration of charge carriers, leading to enhanced wastewater treatment efficiency. Generally, photocatalytic activities are evaluated in laboratory with xenon lamp (140 ∼ 150 mW/cm<sup>2</sup>) as simulated sunlight. Herein, photodegradation measurements are carried out in outdoor scene with real sunlight as illumination source. As a result, the targeted Ca-alg/S<sub>v</sub>-Cu<sub>2</sub>SnS<sub>3</sub>/Bi<sub>2</sub>WO<sub>6</sub> catalyst exhibits the excellent tetracycline elimination performances whether in sunny (58.24 ∼ 64.85 mW/cm<sup>2</sup>) or cloudy (33.56 ∼ 63.86 mW/cm<sup>2</sup>), even overcast (11.19 ∼ 18.12 mW/cm<sup>2</sup>) weathers, with elimination efficiencies of 61.05 %, 57.49 %, and 44.33 % after 150 min of sunlight irradiation. Furthermore, the encapsulations of calcium-alginate microspheres toward catalyst powders cause the easy recycle and reuse after reaction, which reduces cost and causes no secondary pollution, contributing to promising practical applications.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"691 ","pages":"Article 162666"},"PeriodicalIF":6.3,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417286","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}
Pub Date : 2025-02-16DOI: 10.1016/j.apsusc.2025.162701
Tao Li , Youmei Chen , Yang Li , Zhiyao Chu , Hui Zhang , Jiayi Lin , Yicheng Li , An Xue , Lu Chen
As a major region for the production of alumina and Maotai-flavor liquor in China, environmental problems in Guizhou province caused by the accumulation of red mud (RM) and Maotai-flavor liquor distillers’ grains (DGs) solid wastes have become increasingly serious. In this paper, high performance heterogeneous photo-Fenton catalysts were obtained by one-step co-pyrolysis process using RM and Maotai-flavor liquor DGs solid wastes as precursors. The catalysts had the optimal properties when the pyrolysis temperature was 900°C. Within 10 min, the tetracycline, rhodamine B, methylene blue and acid orange 7 degradation rates under visible light were 91.6 %, 94.5 %, 77.2 % and 94.2 %, respectively. The Fe0 was the key factor for photo-Fenton process. XRD analysis confirmed that the iron oxide species in the RM were reduced to Fe0 completely by DGs. Circulating experiments analysis revealed that the RMBC-900 remained stable after five successive reuses for TC degradation. The primary reaction oxygen species (ROS) responsible for TC degradation were 1O2, and followed by h+, •OH and •O2–. The RMBC-900 derived from industrial solid wastes showed great potential application in antibiotics and dyes containing wastewater treatment. Most importantly, the resource utilization of RM and DGs was realized availably and valuably.
{"title":"High removal efficiency of antibiotic and dyes by heterogeneous photo-Fenton process using red mud and waste Maotai distillers’ grains as catalyst precursors","authors":"Tao Li , Youmei Chen , Yang Li , Zhiyao Chu , Hui Zhang , Jiayi Lin , Yicheng Li , An Xue , Lu Chen","doi":"10.1016/j.apsusc.2025.162701","DOIUrl":"10.1016/j.apsusc.2025.162701","url":null,"abstract":"<div><div>As a major region for the production of alumina and Maotai-flavor liquor in China, environmental problems in Guizhou province caused by the accumulation of red mud (RM) and Maotai-flavor liquor distillers’ grains (DGs) solid wastes have become increasingly serious. In this paper, high performance heterogeneous photo-Fenton catalysts were obtained by one-step co-pyrolysis process using RM and Maotai-flavor liquor DGs solid wastes as precursors. The catalysts had the optimal properties when the pyrolysis temperature was 900°C. Within 10 min, the tetracycline, rhodamine B, methylene blue and acid orange 7 degradation rates under visible light were 91.6 %, 94.5 %, 77.2 % and 94.2 %, respectively. The Fe<sup>0</sup> was the key factor for photo-Fenton process. XRD analysis confirmed that the iron oxide species in the RM were reduced to Fe<sup>0</sup> completely by DGs. Circulating experiments analysis revealed that the RMBC-900 remained stable after five successive reuses for TC degradation. The primary reaction oxygen species (ROS) responsible for TC degradation were <sup>1</sup>O<sub>2</sub>, and followed by h<sup>+</sup>, •OH and •O<sub>2</sub><sup>–</sup>. The RMBC-900 derived from industrial solid wastes showed great potential application in antibiotics and dyes containing wastewater treatment. Most importantly, the resource utilization of RM and DGs was realized availably and valuably.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"692 ","pages":"Article 162701"},"PeriodicalIF":6.3,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417677","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}
In this study, we designed a novel two-dimensional ulrathin TiO2 nanosheet structure decorated with Ir quantum dots via an immersion method for photocatalytic H2 production. The resulting Ir-modified TiO2 (Ir/TiO2) possess excellent and stable photocatalytic H2 production activity, with the H2 production rate of 3% Ir/TiO2 being 21 times that of pure TiO2. This enhanced photocatalytic activity is attributed to the interface sites formed between the two-dimensional ultrathin structure and Ir quantum dots, which increase visible light absorption, accelerate the separation of photogenerated charges, and evidently lower the reaction barrier. Additionally, the unique two-dimensional nanosheet structure of TiO2 provides a high surface area for optimal dispersion of Ir quantum dots. The size of Ir nanoparticles increased only slightly, from 1.1 nm to 2.1 nm, after five cycles, indicating high stability. This work presents a potential strategy for designing 0D/2D photocatalysts for efficient H2 production.
{"title":"Strong coupling effects at the interfacial sites of a heterojunction formed by 0D/2D Ir quantum dots and TiO2 ultrathin nanosheets for robust photocatalytic H2 production","authors":"Junlan Guo, Guanghua Liang, Ruiying Wang, Fen-e Gao, Xing Liu, Xi Zhang","doi":"10.1016/j.apsusc.2025.162700","DOIUrl":"10.1016/j.apsusc.2025.162700","url":null,"abstract":"<div><div>In this study, we designed a novel two-dimensional ulrathin TiO<sub>2</sub> nanosheet structure decorated with Ir quantum dots via an immersion method for photocatalytic H<sub>2</sub> production. The resulting Ir-modified TiO<sub>2</sub> (Ir/TiO<sub>2</sub>) possess excellent and stable photocatalytic H<sub>2</sub> production activity, with the H<sub>2</sub> production rate of 3% Ir/TiO<sub>2</sub> being 21 times that of pure TiO<sub>2</sub>. This enhanced photocatalytic activity is attributed to the interface sites formed between the two-dimensional ultrathin structure and Ir quantum dots, which increase visible light absorption, accelerate the separation of photogenerated charges, and evidently lower the reaction barrier. Additionally, the unique two-dimensional nanosheet structure of TiO<sub>2</sub> provides a high surface area for optimal dispersion of Ir quantum dots. The size of Ir nanoparticles increased only slightly, from 1.1 nm to 2.1 nm, after five cycles, indicating high stability. This work presents a potential strategy for designing 0D/2D photocatalysts for efficient H<sub>2</sub> production.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"691 ","pages":"Article 162700"},"PeriodicalIF":6.3,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427101","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}
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