Journal of the Taiwan Institute of Chemical Engineers最新文献

{"title":"Low-cost coal-based adsorbents for the removal of high concentrated ammonia nitrogen from real coking wastewater: Aiming at industrial application","authors":"Hui Zhang ,&nbsp;Yueli Wen ,&nbsp;Bin Wang ,&nbsp;Wenrui Hua ,&nbsp;Wei Huang","doi":"10.1016/j.jtice.2024.105798","DOIUrl":"10.1016/j.jtice.2024.105798","url":null,"abstract":"<div><h3>Background</h3><div>The removal of high-concentrated ammonia nitrogen (AN) from the real coking wastewater (CW) is a tough nut to crack for coking industry. Coal-gangue, a solid waste, troubles the world, too. From the perspective of treat waste with waste, a promising coal-gangue-based adsorbent BY-N1, was developed to treat high-concentrated real CW and show excellent regenerability and removal rate (RR). This work hopefully broadens a new horizon for the development of waste-based adsorbent for removing AN in industrial application.</div></div><div><h3>Methods</h3><div>BY-N1 was prepared from coal-gangue by simple solvent treatment and calcination. The effects of the adsorbent dosage, pH, initial concentration and reusability were investigated. Based on the adsorption isotherms, kinetics and thermodynamics, the adsorption mechanism was proposed.</div></div><div><h3>Significant findings</h3><div>BY-N1 exhibits the potential in industry application, with the best ammonia nitrogen removal rate (ANRR) of 40.53 % for the complex real CW (about 3000 mg/L) in 20 mins and promising regenerability. Chemical adsorption dominant the adsorption process, the quasi-second-order model and Freundlich isotherm fit the adsorption process better, the maximum saturated adsorption capacity of BY-N1 is 240 mg g^-1. This is a spontaneous and endothermic process by thermodynamic analysis, which involves the crucial contribution of complexation, hydrogen bonding interaction, electrostatic adsorption and Vander Waals force.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105798"},"PeriodicalIF":5.5,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142534943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Separation of molybdenum and tungsten using selective adsorption with zirconium based metal organic framework","authors":"Congjian Zhang ,&nbsp;Liwen Ma ,&nbsp;Xiaoli Xi ,&nbsp;Zuoren Nie","doi":"10.1016/j.jtice.2024.105802","DOIUrl":"10.1016/j.jtice.2024.105802","url":null,"abstract":"<div><h3>Background</h3><div>The separation of tungsten and molybdenum has always been a significant challenge. Metal organic frameworks (MOFs) has potential to solve the problem. In this study, the adsorption and separation performance of UiO-66 for tungsten and molybdenum and adsorption mechanism were investigated.</div></div><div><h3>Methods</h3><div>UiO-66 was synthesized by solvothermal method. The physical and chemical properties of UiO-66 and adsorption mechanism were characterized and analyzed by XRD, SEM-EDS, FT-IR, Zeta-potential, XPS and thermodynamic analysis, the adsorption and separation performance of Mo/W using UiO-66 were evaluated by ICP-OES.</div></div><div><h3>Significant findings</h3><div>UiO-66 with uniform pore size could be obtained under the conditions of crystallization for 24 h at 180 °C. This study revealed superior Mo/W separation performance under acidic conditions, where the adsorption capacity for Mo (Q_Mo) of UiO-66 was 219.4 mg⋅<em>g</em>⁻¹ and the highest separation factor (β_Mo/W) was 52.3. It was found that the mechanism involved the effect of pore size, electrostatic attraction and the metal point Zr had stronger affinity for Mo. This material was expected to serve as an eco-friendly and reusable adsorbent for separation of tungsten and molybdenum in resource recovery, aiming for high-quality regeneration of both metals.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105802"},"PeriodicalIF":5.5,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142445244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insights into the photocatalytic process of surface-platinized hierarchical anatase TiO2 nanoparticles by in-situ DRIFT analysis","authors":"Chandra Mohan Singaravelu ,&nbsp;Veerappan Kavinkumar ,&nbsp;Kandasamy Jothivenkatachalam ,&nbsp;Guan-Ting Pan ,&nbsp;Aleksandar N. Nikoloski ,&nbsp;Kasimayan Uma ,&nbsp;Zong-Liang Tseng ,&nbsp;Thomas C.-K. Yang","doi":"10.1016/j.jtice.2024.105797","DOIUrl":"10.1016/j.jtice.2024.105797","url":null,"abstract":"<div><h3>Background</h3><div>Environmental remediation researchers are challenged to unravel the mechanisms of dual-responsive photocatalysts for degrading pollutants in both liquid and gas phases. This study aims to provide comprehensive insights into the photocatalytic processes employed by surface-platinized hierarchical anatase TiO₂ nanoparticles. The investigation includes an in-depth analysis of the associated mechanism through in-situ DRIFT analysis.</div></div><div><h3>Methods</h3><div>Utilizing surfactant-assisted surface platinized TiO₂ samples synthesized through soft-template and chemical reduction techniques, this study investigated their efficacy in the degradation of crystal violet dye (10 ppm) under irradiation from a 380.8 W mercury-xenon lamp. The photooxidation of gas-phase ethanol was subsequently examined using the DRIFT technique.</div></div><div><h3>Significant findings</h3><div>The Pt-deposited C-TiO₂ nanoparticles exhibited an impressive photocatalytic dye degradation efficiency of 87.07 %, surpassing the performance of other synthesized catalysts. To elucidate the mechanism behind this enhancement, an in-situ DRIFT analysis was conducted using the photo-oxidation of ethanol. The enhanced efficiency can be attributed to the incorporation of Pt metal, which serves as an electron collector in the n-type TiO₂ semiconductor, thereby prolonging electron lifetime. Additionally, the pivotal role of hydroxyl radicals and holes in generating intermediates was thoroughly examined through DRIFT analysis, providing comprehensive insights into the photocatalytic reaction and the reactive intermediate species involved.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105797"},"PeriodicalIF":5.5,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142445245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of hafnium dioxide morphology on catalytic transfer hydrogenation of methyl levulinate to γ-valerolactone: A comparative study","authors":"Jia-Yin Lin ,&nbsp;Chih-Ying Wang ,&nbsp;Bing-Ze Lin ,&nbsp;Kun-Yi Andrew Lin","doi":"10.1016/j.jtice.2024.105801","DOIUrl":"10.1016/j.jtice.2024.105801","url":null,"abstract":"<div><h3>Background</h3><div>The catalytic transfer hydrogenation (CTH) of methyl levulinate (ML) to γ-valerolactone (GVL) is a promising method for producing renewable fuels and chemicals. The efficiency of this process depends heavily on the choice of catalysts, with morphology playing a critical role in their performance.</div></div><div><h3>Methods</h3><div>This study synthesized and characterized rice-like (r-HfO₂) and ball-like (b-HfO₂) hafnium oxide nanostructures. r-HfO₂ was prepared using a microwave system, while b-HfO₂ was synthesized via a solvothermal method. The catalysts were characterized using SEM, TEM, XRD, TPD-NH₃ analysis, and nitrogen sorption isotherms to determine their morphological, structural, and acidic properties. The catalytic performance of these nanostructures was tested under optimal conditions of 160 °C and 2 h in a batch-type solvothermal reactor.</div></div><div><h3>Significant Findings</h3><div>The results showed that b-HfO₂ exhibited a conversion efficiency of 90 % and a GVL yield of 90 %, outperforming r-HfO₂, which achieved 94.8 % conversion and 75.2 % yield. Recyclability tests confirmed the durability of both catalysts, with b-HfO₂ maintaining better activity. Detailed analyses revealed that b-HfO₂ exhibits superior catalytic activity and energy efficiency, achieving higher GVL yield and better energy efficiency. The conversion rates reached up to 100 % for both catalysts at 200 °C, with b-HfO₂ achieving a higher GVL yield and better energy efficiency. These findings demonstrate the potential of HfO₂-based catalysts, especially b-HfO₂, in efficiently converting biomass-derived feedstocks to valuable chemicals.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105801"},"PeriodicalIF":5.5,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142442053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strengthening cationic repulsion on graphene oxide membrane to boost water desalination","authors":"Ziyi Huang ,&nbsp;Xiaojia Zhang ,&nbsp;Fan Yang ,&nbsp;Rajkumar Devasenathipathy ,&nbsp;Xinglan Peng ,&nbsp;Limin Wang ,&nbsp;Dujuan Huang ,&nbsp;Youjun Fan ,&nbsp;Wei Chen ,&nbsp;Du-Hong Chen","doi":"10.1016/j.jtice.2024.105799","DOIUrl":"10.1016/j.jtice.2024.105799","url":null,"abstract":"<div><h3>Background</h3><div>As a hydrophilic two-dimensional material with oxygen-containing groups on its basal planes, graphene oxide (GO) has been used for the fabrication of GO-based membranes to purify/desalinate water. However, promoting salt rejection of GO-based membranes is challenging while maintaining high water permeability.</div></div><div><h3>Methods</h3><div>First, the mercaptoethylamine-modified Ag NWs (Ag-MA) were prepared by mixing Ag NWs and MA to form Ag—S bonds. Then, Ag-MA was deposited on the GO membrane under externally assisted filtration to achieve the GO/Ag-MA membrane, which ensures the well-stacking of GO sheets and the even coating of GO membrane. Therefore, the delicately fabricated membrane possesses great electropositive cations and high swelling-tolerance in water solution.</div></div><div><h3>Significant findings</h3><div>We found that a high electrostatic repulsive interaction between the amino group and metal cations in GO/Ag-MA membrane aided the promotion of rejection rates, which was up to 75 % for both <em>K</em>⁺ and Mg²⁺, surpassing that of the previously reported values. This work highlights a new approach for enhancing the electrostatic repulsion with metal cations near the surface/interface of GO-based membranes and their application in the development of water desalination and purification.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105799"},"PeriodicalIF":5.5,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142442052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface interaction of expired Brilcure (Ticagrelor) drug on soft-cast steel in 0.5 M H2SO4 medium: Corrosion protection, surface characterizations and computational studies","authors":"Savitri Danappa Kotabagi ,&nbsp;Ragini L. Minagalavar ,&nbsp;S.K. Rajappa ,&nbsp;Manohar R. Rathod ,&nbsp;Ashok M. Sajjan ,&nbsp;J.G. Suma","doi":"10.1016/j.jtice.2024.105791","DOIUrl":"10.1016/j.jtice.2024.105791","url":null,"abstract":"<div><h3>Background</h3><div>Soft-cast steel (SCS) is extensively used in industry but is prone to corrosion in acidic solutions, necessitating effective protection methods. Corrosion inhibitors offer a rapid, easy, and economical solution. However, expired ticagrelor (Brilcure) poses environmental risks when discarded due to its active components. Therefore, this study explores the use of expired ticagrelor (<em>TCGL</em>) to prevent SCS corrosion in sulfuric acid, utilizing its active components, such as N and O atoms and conjugated bonds, as adsorption centers while being environmentally friendly.</div></div><div><h3>Methods</h3><div>The corrosion inhibition and adsorption properties of <em>TCGL</em> on SCS in 0.5 M H₂SO₄ were investigated using weight loss, potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) techniques. Surface characterization of SCS was performed using scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX), atomic force microscopy (AFM), and water contact angle (WCA) measurements. The adsorption behavior of <em>TCGL</em> followed the Langmuir isotherm model. Additionally, density functional theory (DFT) and molecular dynamics (MD) simulations were employed to elucidate the bonding interactions between <em>TCGL</em> and the metal surface.</div></div><div><h3>Significant findings</h3><div>Ticagrelor achieved 98.99 % inhibition efficiency at 250 ppm by adsorbing on the steel surface, forming a protective film. PDP studies showed decreased corrosion current density and a potential shift from -0.53 V to -0.49 V. SEM and AFM confirmed significant protection. DFT and MD simulations identified active sites and molecular mechanisms, highlighting Ticagrelor's potential as an effective, eco-friendly corrosion inhibitor for SCS.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105791"},"PeriodicalIF":5.5,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of type II quaternary double-decker heterostructure Cu-WO3-BiVO4-Bi2S3NiOOH photoanode for stable and efficient photoelectrochemical water splitting","authors":"S Sadhasivam ,&nbsp;T Sadhasivam ,&nbsp;K Selvakumar ,&nbsp;TH Oh ,&nbsp;G Annadurai ,&nbsp;Nagaraj Murugan ,&nbsp;Yoong Ahm Kim","doi":"10.1016/j.jtice.2024.105786","DOIUrl":"10.1016/j.jtice.2024.105786","url":null,"abstract":"<div><h3>Background</h3><div>Bismuth vanadate (BiVO₄) and nickel oxyhydroxide (NiOOH) are the prominent photo(electro)catalysts for water-splitting photoelectrodes. The strong visible light absorbers of the Bi₂S₃ decorated type II photoanode of WO₃/BiVO₄/NiOOH efficiently improve the photo-excitons in the photoanodes.</div></div><div><h3>Methods</h3><div>In this work, type II semiconductors heterostructure photoanodes are fabricated as Cu:WO₃/BiVO₄/Bi₂S₃/NiOOH. The bottom layer of heavily Cu- doped n-type WO₃ nanoplatelets is grown on FTO to make nano-heterostructure Cu:WO₃/BiVO₄ photoanodes. The Bi₂S₃ semiconductor has been grown on the BiVO₄ by chemical bath deposition and NiOOH deposited using the photo-assisted electrodeposition method. The resulting periodically ordered BiVO₄/WO₃ platelets distinctly outperform by the Bi₂S₃ and NiOOH-decorated quaternary photoanodes.</div></div><div><h3>Significant findings</h3><div>As a result, the as-prepared photoanode shows a high photocurrent density of 6.85 mA cm⁻² at 0 V vs. Ag/AgCl under the irradiation of 100 mW/cm² AM 1.5 G simulated sunlight. With the higher photoactivity of Bi₂S₃ and NiOOH cocatalysts, the photoanode substantially gains stability at higher saturation photocurrents. Overall, the photoanode resulted in a low charge transfer resistance (387.4 Ohm.cm²) and a higher built-in potential of 180 mV, with 2.67 % of ABPE and 2.1 % of STH efficiencies at 0.3 V vs. Ag/AgCl.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105786"},"PeriodicalIF":5.5,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermodynamic properties of binary, ternary and quaternary mixtures: N‑butyl acetate- n-hexanol - n,n-dimethylacetamide-water. Modeling using regression algorithms and optimization using socially-inspired evolutionary algorithms","authors":"Iuliana Bîrgăuanu ,&nbsp;Marius Gavrilescu ,&nbsp;Florin Leon ,&nbsp;Silvia Curteanu ,&nbsp;Gabriela Lisa","doi":"10.1016/j.jtice.2024.105796","DOIUrl":"10.1016/j.jtice.2024.105796","url":null,"abstract":"<div><h3>Background</h3><div>The design of chemical plants requires knowledge of the thermodynamic properties of the fluids involved.</div></div><div><h3>Methods</h3><div>In our research, we performed experimental measurements of the refractive index and density of binary, ternary and quaternary systems containing n‑butyl acetate, n-hexanol, n,n-dimethylacetamide and water, at atmospheric pressure and the following temperatures: 293.15 K, 303.15 K, 313.15 K and 323.15 K. They were used to determine the excess molar volume, which was correlated with mole fractions, normalized temperature and refractive index, using artificial neural networks and other models obtained with regression algorithms, optimized with different socially-inspired evolutionary algorithms.</div></div><div><h3>Significant Findings</h3><div>The best results were achieved with decision tree regression and the queuing search optimization algorithm. The present approach is based on the fact that there are few similar studies in the literature; in addition, the models obtained can complement/supplement the experimental data through predictions.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105796"},"PeriodicalIF":5.5,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solar-driven Pt free hydrogen production and successive degradation of sulfasalazine using CuO/ZnO binary nanocomposites: Reaction kinetics and determination of reaction parameters using response surface methodology","authors":"Mahroza Kanwal Khan ,&nbsp;Umar Farooq ,&nbsp;Khalida Naseem ,&nbsp;Muhammad Raheel Khan ,&nbsp;Mohammad Ehtisham Khan ,&nbsp;Wahid Ali ,&nbsp;Syed Kashif Ali ,&nbsp;Mohammad S. Alomar ,&nbsp;Mohammad Arishi ,&nbsp;Abdullateef H. Bashiri ,&nbsp;Muhammad Yasir Khan","doi":"10.1016/j.jtice.2024.105789","DOIUrl":"10.1016/j.jtice.2024.105789","url":null,"abstract":"<div><h3>Background</h3><div>Approaches for sustainable, green, and expensive catalyst-free hydrogen production have not been explored extensively. Moreover, during photocatalysis, a lot of material gets wasted due to a lack of proper optimization of the reaction parameters to remove the toxic industrial effluents.</div></div><div><h3>Methods</h3><div>Here in this study, we present the green synthesis of CuO/ZnO nanocomposites from the ethanolic crude extract of <em>Oxystelma esculentum</em>. The synthesized photocomposites were systematically characterized by Fourier transform infrared spectroscopy, zeta potential, x-ray diffraction, scanning electron microscopy, transmission electron microscopy, atomic force microscopy, and x-ray photoelectron spectroscopy. The performed analyses provided useful insights into identifying important functional groups, size, morphology, elemental composition, crystallinity, and defects in the synthesized photocomposites.</div></div><div><h3>Significant Findings</h3><div>After characterization, the nanocomposites were evaluated for photocatalytic sulfasalazine (SSZ) degradation and hydrogen production. The response surface methodology (RSM) was employed to optimize SSZ's photocatalytic degradation. The optimized values of reaction parameters for the photocatalytic degradation of SSZ comprise pH = 4.06, SSZ dose = 47.75 mg/L, CuO/ZnO dose = 44.42 mg, and temperature = 23.60 °C. The rates observed in the hydrogen production (1136 µmolh^-1g^-1) were obtained without costly co-catalyst. The optimized values for hydrogen production include photocatalyst dosage = 50 mg, pH = 7, and time = 5 hours. These features signify the efficient separation of charge carriers between synthesized nanocomposites, resulting in exquisite activities.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105789"},"PeriodicalIF":5.5,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison between endogenous and exogenous nitrogen of nitrogen-doped carbon catalyst in the process of activating PMS","authors":"Shengrong Liu ,&nbsp;Boyang Wang ,&nbsp;Yimeng Huang ,&nbsp;Xing Xu ,&nbsp;Yujiao Kan ,&nbsp;Yanan Shang","doi":"10.1016/j.jtice.2024.105793","DOIUrl":"10.1016/j.jtice.2024.105793","url":null,"abstract":"<div><h3>Background</h3><div>Advanced oxidation processes (AOPs) based on sulfate radicals (SO₄^•–) have proven to be highly effective in degrading organics in wastewater. Carbon-based materials have emerged as promising catalysts for activating persulfate, which generates environmentally friendly sulfate radicals (SO₄^•–), for remediation purposes. The nitrogen doping technique is an effective method for site-specific regulation and can significantly enhance the performance of carbon-based catalysts, which could promote the application of carbon-based catalysts in the future. Endogenous and exogenous nitrogen sources can provide nitrogen sources for N doping. However, there are few reports on the comparison of the structure and catalytic mechanism of these two types of N-doped biochar. It is also of great significance to reveal the mechanisms of constructing catalytic sites using endogenous and exogenous nitrogen.</div></div><div><h3>Methods</h3><div>Herein, the preparation of endogenous nitrogen-doped biochar (BC) was achieved by using soybean as the precursor material, which is rich in natural nitrogen-containing components of proteins. Subsequently, the BC was doped by mixing it with urea and pyrolysis, resulting in the preparation of exogenous nitrogen-doped biochar (NBC).</div></div><div><h3>Significant findings</h3><div>The characterization of XRD and HRTEM showed that g-C₃N₄ formed in NBC. The results of catalytic degradation and quenching experiments demonstrate that the exogenous nitrogen-doped catalysts have a better performance than endogenous nitrogen-doped catalysts. The OFL removal rate in BC/PMS was higher than that in the BC/PMS system (71.68% <em>vs.</em> 61.83 %). The <em>k</em>_obs in NBC/PMS are also higher than that in BC/PMS (0.00943 min⁻¹ <em>vs.</em> 0.01369 min⁻¹). The NBC could be a promising catalyst for PMS activation in practical application. DFT results showed that the g-C₃N₄ generated from exogenous nitrogen can improve PMS activation performance in the g-C₃N₄/graphene bilayer structure. The influence on the charge distribution of surrounding carbon materials makes endogenous nitrogen doping a good choice for optimizing the local performance of the material in the absence of natural nitrogen components.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105793"},"PeriodicalIF":5.5,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}