Research on Chemical Intermediates最新文献

{"title":"Study on denitration performance and mechanism of SCR of NO with NH3 of rare earth tailings catalyst modified by Ce for at low temperature","authors":"Limin Hou,&nbsp;Jiaming Li,&nbsp;Tiantian Wang,&nbsp;Wenfei Wu,&nbsp;Junmao Qie","doi":"10.1007/s11164-024-05487-z","DOIUrl":"10.1007/s11164-024-05487-z","url":null,"abstract":"<div><p>The NH₃-SCR method is the most prevalent technology utilised for the removal of NO<i>x</i>. Among the numerous types of catalysts, minerals are composed of multiple metallic elements that produce natural synergistic catalytic effects when applied in the denitrification process. This phenomenon underscores the potential for their application in this field of research. In this study, rare earth tailings were modified using a hydrothermal method with Ce as the modifying agent. The impact of Ce-modified tailings catalysts on low-temperature denitrification performance and physicochemical properties was examined through a series of analytical techniques, including XRD, BET, SEM–EDS, XPS, NH₃-TPD, H₂-TPR, XPS, and in situ DRIFTS analyses. The findings indicated that the denitrification efficiency and N₂ selectivity of 7.5% Ce/rare earth tailings were 83% and 90%, respectively. The reaction temperature window was expanded from 250 °C to 425 °C. A mesoporous surface structure with highly dispersed active components, namely cerium and iron, was obtained. Concurrently, the combined effect of Ce and Fe resulted in an increase in oxygen vacancies, acidic sites, and acid activity strength within the catalyst. The denitrification reaction is governed by both the E-R and L–H mechanisms. The catalyst surface exhibits both Brønsted and Lewis acidic sites, with Brønsted acidic sites being more conducive to denitrification. The SCR reaction is predominantly influenced by NH⁴⁺ species adsorbed on Brønsted acidic sites, resulting in the formation of NH₃. Two active centres of Ce⁴⁺ and Fe³⁺ in the rare earth tailings, and NO as gaseous adsorbed NO₂, monodentate nitrate, and small amounts of bridged nitrate and bidentate nitrate participate in the SCR reaction.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 2","pages":"743 - 762"},"PeriodicalIF":2.8,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CO2 methanation process over highly active and nanostructured NiO–Al2O3 catalyst synthesized by various methods","authors":"Kianoush Tamimi,&nbsp;Seyed Mehdi Alavi,&nbsp;Mehran Rezaei,&nbsp;Ehsan Akbari","doi":"10.1007/s11164-024-05501-4","DOIUrl":"10.1007/s11164-024-05501-4","url":null,"abstract":"<div><p>This study is centered on the synthesis of NiO–Al₂O₃ catalysts using multiple preparation methods, which encompass mechanochemical, impregnation, sol–gel, co-precipitation, and combustion techniques. These various methods were employed to create catalyst samples, subsequently utilized in the carbon dioxide methanation process. Comprehensive characterization of the prepared samples encompassed H₂-TPR, XRD, BET, and FESEM analyses. The outcomes of the BET and XRD analyses unveiled that the 20NiO–Al₂O₃ catalyst, synthesized via the mechanochemical preparation approach, exhibited exceptional efficiency in relation to CO₂ conversion and selectivity of methane. This was especially pronounced at lower temperatures. Notably, this catalyst showcased a specific surface area measuring 240.7 m²/g, coupled with a reduced crystal size of 29.4 nm. The 20NiO–Al₂O₃ catalyst demonstrated a carbon dioxide conversion of 68%, coupled with a methane selectivity of 96% under the operational condition of 400 ℃. Notably, this catalyst demonstrated the highest degree of stability when compared to the other catalysts studied. To comprehensively assess the impact of varying nickel loadings, spanning from 5 to 25 wt. %, on both textural attributes and the catalytic efficacy of mechanochemically synthesized NiO–Al₂O₃, an in-depth investigation was undertaken. The experimental findings from this investigation unveiled that the augmentation of nickel loading up to 20 wt.% led to a discernible enhancement in CO₂ conversion efficiency. However, beyond this threshold, a decline in CO₂ conversion was detected. This can be linked to the phenomenon of particle sintering, which subsequently leads to a decrease in the dispersion of the active catalytic phase. Furthermore, the study thoroughly examined processing conditions and the temperature of calcination, assessing their influence on the catalytic efficiency of the chosen catalyst.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 2","pages":"695 - 719"},"PeriodicalIF":2.8,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Facile and green synthesis of copper oxide nanoparticles using Pithecellobium dulce seed pods and their antioxidant, anticancer, and catalytic applications","authors":"Kondaiah Seku,&nbsp;G. Bhagavanth Reddy,&nbsp;Krishna Kumar Koyyala,&nbsp;Nadavala Siva Kumar,&nbsp;Shabbir AhamadKazi,&nbsp;N. Satya Vijaya Kumar,&nbsp;Surendar Reddy Jakka,&nbsp;Janardhan Reddy Koduru,&nbsp;Kadimpati Kishore Kumar,&nbsp;Mohammad Asif","doi":"10.1007/s11164-025-05502-x","DOIUrl":"10.1007/s11164-025-05502-x","url":null,"abstract":"<div><p>The present investigation focussed on the biogenic synthesis of copper oxide nanoparticles (CuO NPs) from <i>Pithecellobium dulce</i> seed pods, which were used as reducing and stabilizing agents. Various analytical techniques were used to characterize the synthesized CuO nanoparticles (CuO NPs), including UV–visible, Scanning Electron Microscopy (SEM), Energy-dispersive X-ray (EDAX) spectroscopy, Fourier Transform Infrared (FTIR), Transmission Electron Microscopy (TEM) and X-ray diffraction (XRD) analysis. XRD analysis revealed that the synthesized CuO NPs were crystallized in a single phase. FTIR spectroscopy revealed that the functional groups of phytochemicals facilitated the conversion of Cu²⁺ ions into CuO NPs and concurrently stabilized these nanoparticles. TEM analysis revealed that CuO NPs are spherical and have an average size of 13 ± 3 nm. CuO NPs exhibited significant antioxidant and anticancer activity. CuO NPs were also tested for their catalytic ability to reduce methylene blue dye in the presence of NaBH₄. The 90.75% DPPH scavenging activity for CuO NPs was observed at the highest concentration (110 µL). The degradation efficiency for methylene blue (MB) was found to be 98.7%. The PFO (pseudo-first order) model was utilized to describe the kinetics of the reduction process, and the reaction rate constant (<i>k</i>) was 0.337 min⁻¹. It was found that CuO NPs reduced methylene blue dye with significant catalytic efficiency. Biomedical applications, as well as water remediation, can be achieved through the use of CuO NPs.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 3","pages":"1641 - 1659"},"PeriodicalIF":2.8,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Visible-light-driven Z-scheme Bi2Sn2O7/CuBi2O4 heterojunction photocatalysts for the degradation of methylene blue and rhodamine B dyes","authors":"Madhu Dharmapuri,&nbsp;B. Ashok,&nbsp;Someshwar Pola,&nbsp;G. Upender","doi":"10.1007/s11164-024-05490-4","DOIUrl":"10.1007/s11164-024-05490-4","url":null,"abstract":"<div><p>Degrading the organic compounds using the photocatalysis is a potential technology to control the environmental pollution. Concerned with this problem, a one-step hydrothermal approach was used to synthesise novel (1-x)Bi₂Sn₂O₇-xCuBi₂O₄ heterojunctions (where x = 0.05, 0.10, 0.15 and 0.20 wt.%). The compounds were investigated using XRD, FESEM, EDX, HRTEM, XPS, FTIR, UV-DRS, BET, EIS and PL techniques. The degradation of methylene blue (MB), rhodamine B (Rh B) and phenol were used to examine the photocatalytic activity (PCA) of Bi₂Sn₂O₇-CuBi₂O₄ heterojunctions. 0.90Bi₂Sn₂O₇–0.10CuBi₂O₄ heterojunction exhibited the highest PCA than pure Bi₂Sn₂O₇ and CuBi₂O₄. The enhanced specific surface area and the improved charge separations were primarily accountable for the enhanced PCA of these heterojunctions. The plausible mechanism of high PCA of these heterojunctions was comprehensively understood through the precisely computed energy band potentials and the performed free-radical trapping experiments. The trapping investigations showed that h⁺ and <span>(O_{2}^{ cdot - })</span> play important roles, with <span>(O_{2}^{ cdot - })</span> being the most prominent species. After four cycles, the heterojunction still effectively degraded the contaminants.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 2","pages":"995 - 1022"},"PeriodicalIF":2.8,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Denitrification performance and mechanism of NH3-SCR rare earth tailings catalyst modified by Ce combined with Mn","authors":"Limin Hou,&nbsp;Xiankang Sun,&nbsp;Jiaming Li,&nbsp;Linbo Lu,&nbsp;Tiantian Wang,&nbsp;Wenfei Wu","doi":"10.1007/s11164-024-05479-z","DOIUrl":"10.1007/s11164-024-05479-z","url":null,"abstract":"<div><p>CeMn-rare earth tailings catalysts with wide temperature window and high denitrification were prepared by hydrothermal method. The results show that the optimum ratio of Ce/Mn is 1:1, and the NO_x conversion can reach 90% at the range of 100–300 °C. The introduction of Mn improves the dispersion of CeCO₃F on the catalyst surface, exposing more active adsorption sites. In addition, the interaction of MnO_x with Ce and Fe in the rare earth tailings promotes redox, which facilitates the oxidation of NO to NO₂. Meanwhile Mn also increases the abundance and stability of NO adsorption species and Lewis acid sites, forming important intermediates such as Mn⁴⁺-ONO₂, NH₄NO₃ and NH₂NO. But the strong oxidizing ability of Mn and the reaction between monodentate nitrate and adsorbed NH₃ results in N₂ selectivity decrease rapidly. Catalysts follow both E-R and L–H mechanism in the NH₃-SCR reaction. Moreover, the excellent redox performance and Lewis acid sites improve the NH₃-SCR catalytic activity together.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 2","pages":"721 - 741"},"PeriodicalIF":2.8,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eco-friendly γ-Al2O3/AgO nanocomposites with potential antibacterial applications and effective photocatalytic degradation of pollutants","authors":"Zarah Alqarni","doi":"10.1007/s11164-024-05498-w","DOIUrl":"10.1007/s11164-024-05498-w","url":null,"abstract":"<div><p>Addressing the dual challenges of environmental pollution and antibiotic resistance, this study investigates the synthesis and application of biosynthesized aluminum oxide nanoparticles (γ-Al₂O₃ NPs) and aluminum oxide/silver oxide nanocomposite (γ-Al₂O₃/AgO NC) using <i>Ocimum basilicum</i> plant extract. The green synthesis approach yielded stable NPs, characterized by XRD, SEM, TEM, FTIR, and UV–Vis techniques. The γ-Al₂O₃/AgO NC exhibited a band gap energy of 3.4 eV and an average particle size of 35 nm, compared to 3.6 eV and 30 nm for γ-Al₂O₃ NPs. Zeta potential measurements demonstrated good stability, with values of -24.5 mV for γ-Al₂O₃ NPs and − 28.6 mV for γ-Al₂O₃/AgO NC. The antimicrobial activity of γ-Al₂O₃ NPs and γ-Al₂O₃/AgO NC was evaluated against <i>Escherichia coli</i> (<i>E. coli</i>) and <i>Staphylococcus aureus</i> (<i>S. aureus</i>). <i>E. coli</i> exhibited an inhibition zone of 18.0 mm, while <i>S. aureus</i> showed a zone of 22.8 mm at a concentration of 5 µg/mL when treated with γ-Al₂O₃ NPs. Furthermore, using the γ-Al₂O₃/AgO NC, the inhibition zones increased significantly to 27.6 mm for <i>E. coli</i> and 23.8 mm for <i>S. aureus</i>, indicating enhanced antibacterial efficacy of the nanocomposite. In photocatalytic experiments, γ-Al₂O₃/AgO NC achieved 96.5% degradation of rhodamine B (RhB) dye within 90 min under sunlight, maintaining 93.05% efficiency after five cycles. These results underscore the dual functionality of γ-Al₂O₃/AgO NC as a sustainable material for environmental remediation and biomedical applications.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 2","pages":"1039 - 1062"},"PeriodicalIF":2.8,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of cerium promotion on Ni–Mg–Al catalysts derived from hydrotalcite structure for dry reforming of methane","authors":"Baya Djebarri,&nbsp;Fouzia Touahra,&nbsp;Nadia Aider,&nbsp;V. M. Gonzalez-Delacruz,&nbsp;Juan P. Holgado,&nbsp;Alfonso Caballero,&nbsp;Khaldoun Bachari,&nbsp;Djamila Halliche","doi":"10.1007/s11164-024-05472-6","DOIUrl":"10.1007/s11164-024-05472-6","url":null,"abstract":"<div><p>This study investigates the impact of cerium promotion on NiMgAl catalysts for methane dry reforming (DRM) at 750 °C. A series of NiMgAl-Ce oxides with varying cerium content NiMgAlCe-x (x: rate of substitution of aluminium by cerium) were synthesized via co-precipitation method, aiming to enhance catalytic activity through the incorporation of nickel into hydrotalcite structures and cerium promotion. The obtained systems calcined at 800 °C, reduced at 750 °C and used catalysts were characterized by ICP, BET, XRD, SEM, H₂-TPR, TPO and O₂-TG analysis. The results demonstrate that cerium content influences specific surface area, with higher cerium promoting increased surface area but hindering catalytic activity and improved carbon resistance of the catalysts.. Activity improved with reaction temperature, with NiMgAl achieving the highest conversion, with CH₄ conversion dropping from 16% at 450 °C to 95.0% at 750°C. Stability tests at 750 °C, revealed decreased activity in cerium-containing catalysts. On the other hand in the case of catalysts without prior reduction, the catalytic activity of NiMgAlCe-1 and NiMgAlCe-2 catalysts are better, however, the NiMgCe solid presents a total catalytic inertia. This result suggests that the presence of aluminium is bringing a Lewis acidity favours this reducibility suggesting an influence on redox behaviour. Carbon fibers formation was observed, but it did not significantly affect reactor performance.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 2","pages":"571 - 593"},"PeriodicalIF":2.8,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Silver salts of 12-tungstophosphoric acid supported on SBA-15: effect of enhanced specific surface area on ethanol dehydration","authors":"Mayara A. Resende,&nbsp;Maria Clara Hortencio Clemente,&nbsp;Gesley Alex Veloso Martins,&nbsp;Luís Carlos Cides da Silva,&nbsp;Marcia C. A. Fantini,&nbsp;Sílvia C. L. Dias,&nbsp;José A. Dias","doi":"10.1007/s11164-024-05481-5","DOIUrl":"10.1007/s11164-024-05481-5","url":null,"abstract":"<div><p>This work reports the preparation, characterization, and application of silver salt derivatives of HPW (Ag_xHPW) in ethanol dehydration. The materials were fully characterized by elemental EDXRF analysis, XRD, SAXS, SEM, FT-IR, ³¹P MAS NMR, thermal analysis (TG/DTG), N₂ sorption at low temperature (− 196 °C), and pyridine adsorption acidity. The results of the characterization demonstrated that the Keggin structure was preserved in all the synthesized materials. Using the ethanol dehydration model reaction, it was possible to select the most active catalyst in the series: Ag₂HPW. Activation of this salt at 200 and 300 °C revealed that the degree of hydration is an important parameter for catalytic activity. In addition, a dependence on the BET specific surface area was detected for both conversion and selectivity towards ethylene in the salt series. The conversion of ethanol was significantly enhanced after loading 20 wt.% of Ag₂HPW onto ordered mesoporous silica type SBA-15. The reaction conditions were optimized, and the best catalyst (20%Ag₂HPW/SBA-15, calcined at 300 °C) achieved complete ethanol conversion with about 100% selectivity towards ethylene at a temperature of 400 °C.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 2","pages":"633 - 655"},"PeriodicalIF":2.8,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring varied nickel loadings on highly active and mesoporous Ni/Al2O3 catalysts for acetone steam reforming","authors":"Hossein Hasanloo,&nbsp;Seyed Mehdi Alavi,&nbsp;Mehran Rezaei,&nbsp;Farzad Jokar,&nbsp;Ehsan Akbari,&nbsp;Mohammad Varbar","doi":"10.1007/s11164-024-05491-3","DOIUrl":"10.1007/s11164-024-05491-3","url":null,"abstract":"<div><p>This research explored the process of acetone steam reforming using Ni/Al₂O₃ catalysts. Different contents of nickel, ranging from 5 to 20% by weight, were applied to a commercial alumina support with a surface area of 158 m²/g. It was observed that increasing the nickel concentration from 5 to 20% resulted in a reduction of the catalyst's specific surface area from 146 to 127 m²/g, alongside an increase in the crystallite size from 4.9 to 6 nm. The amount of nickel was found to significantly influence the catalyst's performance, its durability, and the formation of carbon deposits on its surface. The catalyst containing 20% weight of nickel on alumina, achieving an 86% rate of acetone conversion and a 74% yield of hydrogen at a temperature of 550 °C, was identified as the most effective. Experiments to determine optimal processing conditions were conducted with this catalyst, varying the temperatures of reduction and calcination, gas hourly space velocity (GHSV), and the steam-to-acetone ratio. The calcination temperature was varied at 600, 700, and 800 °C, revealing that calcination at 600 °C provided the best acetone conversion rate of 100% at 550 °C, correlating with a decrease in specific surface area as calcination temperature increased. Reduction temperatures tested were 500, 600, and 700 °C for a duration of 2 h, where the sample reduced at 700 °C exhibited superior performance with an 86% conversion rate of acetone at 550°C. Evaluating the catalyst's efficacy at steam-to-carbon molar ratios of 4, 6, and 8 demonstrated the highest efficiency at a ratio of 8, achieving complete conversion at 550 °C. Moreover, catalyst activity was tested at GHSVs of 12,000, 18,000, and 24,000 (ml/h.g_cat), finding the highest conversion rate of 90% at the lowest GHSV of 12,000 at 550 °C.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 2","pages":"611 - 631"},"PeriodicalIF":2.8,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction of novel Mn0.2Cd0.8S/Bi4O5Br2 Z-scheme heterojunction for highly efficient photocatalytic dye degradation","authors":"Nan Zheng,&nbsp;Jialin Gou,&nbsp;Meng Lan,&nbsp;Xiaoli Dong,&nbsp;Yujun Liu,&nbsp;Jinpeng Du","doi":"10.1007/s11164-024-05496-y","DOIUrl":"10.1007/s11164-024-05496-y","url":null,"abstract":"<div><p>Photocatalytic technology has received widespread attention as an effective means of treating organic pollutants in wastewater, but the development of effective and sustainable photocatalysts remains a serious challenge. In this study, a novel Mn_0.2Cd_0.8S (MCS)/Bi₄O₅Br₂ (BOB) heterojunction photocatalyst was successfully prepared by a two-step solvothermal method. The photocatalytic activity of the MCS/BOB heterojunction photocatalyst for degrading Rhodamine B (RhB) is significantly enhanced relative to Mn_0.2Cd_0.8S and Bi₄O₅Br₂. When the molar content of Mn_0.2Cd_0.8S was 15% of Bi₄O₅Br₂, the prepared 15% MCS/BOB had the best photocatalytic performance toward RhB with the degradation rate of 91.7% under 60 min of visible light irradiation. The apparent rate constant of 15% MCS/BOB is 10 and 7 times higher than that of Mn_0.2Cd_0.8S and Bi₄O₅Br₂, respectively. The excellent photocatalytic performance is associated with the increased specific surface area, extended light absorption range, and proper construction of Z-scheme heterojunction that facilitate effective charge separation and excellent redox capacity. In addition, the heterojunction photocatalyst shows remarkable photocatalytic stability. This study constructs a novel and effective Z-scheme heterojunction photocatalyst and promotes the exploration of photocatalyst in the purification of organic wastewater.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 2","pages":"1023 - 1037"},"PeriodicalIF":2.8,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}