Journal of the Taiwan Institute of Chemical Engineers最新文献_第5页

Comparative analysis of ensemble, supervised, and deep learning regression algorithms for parametric modelling of solid-liquid fluidization

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-03-14 DOI: 10.1016/j.jtice.2025.106053

Asif Afzal , Abdulrajak Buradi , Md. Tariqul Islam , Mohammad Asif , H. Fayaz , Sung Goon Park , Arunkumar Munimathan , Stéphane PA Bordas

Background

A comparative regression modelling of fluidization bed data parameters is performed in this work using different algorithms. Computational fluid dynamics (CFD) modelling of particle and fluid flow characters using two-fluid Eulerian-Eulerian model. RNG k-ε turbulence coupled with kinetic theory of granular flow was also combined. The developed numerical model is used for generating the fluidization related data of parameters like turbulent viscosity, turbulent dissipation rate, solid velocity, solid volume fraction, granular temperature, and turbulent kinetic energy.

Methods

Comparative modelling and performance analysis between ensemble learning, supervised learning, and neural networks is performed for the mentioned fluidized bed parameters. Ensemble Regression algorithms: Gradient boosting regressor (GBR), Voting regressor (VR), and Random-forest regressor (RFR), supervised learning algorithm - Decision tree (DT), and Deep Artificial neural network (ANN) models are used for the data mapping of fluidization parameters. Performance metrices are accessed in details to compare the modelling results or the algorithms in details for each fluidization parameter.

Findings

From the modelling of this data it is found that numerical data is highly non-linear. DT and RFR algorithms are the most accurate algorithms that predicted with >90 % of accuracy in each case. VT and GBR trained and tested with around 85 % accuracy in most cases but failed in prediction of granular temperature. ANN also sufficiently provided good accuracy while it also failed to predict granular temperature. Solid volume fraction, turbulent kinetic energy, turbulent viscosity, and turbulent dissipation rate were modelled perfectly with all the algorithms. Among all the parameters, turbulent viscosity during training and testing from each model is highly accurately modelled from each of the algorithm with prediction accuracy >90 %.

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引用次数: 0

Waste to waste treatment: Efficient upcycling of jarosite as a metal source and waste PET as a sustainable linker to synthesize iron-based MOF for wastewater treatment

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-03-14 DOI: 10.1016/j.jtice.2025.106095

Pushpendra Kushwaha , Madhu Agarwal , Akhilendra Bhushan Gupta

Background

A significant excess of waste sludge from the metal industry and plastic waste from discarded bottles creates the need for meaningful disposal and sustainable utilisation. Therefore, a sustainable solution has been considered to treat waste streams of textile and pharmaceuticals.

Method

An iron-based metal-organic framework (Fe-BDC MOF) is synthesised from metals and organic linkers. The synthesised iron-based MOFs efficiently treated dyes and antibiotics in industrial waste streams. Recently, antibiotic and dye removal from pharmaceutical and textile industry wastewater has been urgent from the viewpoint of human health and sustainable environment development. Another Fe-BDC MOF was prepared using commercially available terephthalic acid (Fe-BDC) for comparative analysis.

Finding

Developed MOFs were characterised using FTIR, FESEM-EDS, TGA, XRD, XPS, and BET techniques. Additionally, experiments were conducted to assess the adsorption of Norfloxacin (NR) and Methylene blue (MB) dye using developed MOFs. Under optimised conditions [contact time 20 min (NR), 30 min (MB), initial concentration 25 mg/L, temperature 30 °C, dose 0.3 g/L (NR), 1 g/L (MB) and pH (5.5)], according to Langmuir isotherm the developed Fe-BDC MOF shows maximum adsorption capacities of 1123.60 and 256.41 mg/g of NR and MB, respectively. The removal of NR and MB was well fitted with the Freundlich isotherm and pseudo 2nd order model. The outcomes of the thermodynamic study reveal that adsorption is exothermic and spontaneous. The synthesis of the Fe-BDC MOF with PET-derived BDC presents a promising method for addressing environmental PET waste while facilitating the efficient removal of NR and MB from wastewater.

{"title":"Waste to waste treatment: Efficient upcycling of jarosite as a metal source and waste PET as a sustainable linker to synthesize iron-based MOF for wastewater treatment","authors":"Pushpendra Kushwaha , Madhu Agarwal , Akhilendra Bhushan Gupta","doi":"10.1016/j.jtice.2025.106095","DOIUrl":"10.1016/j.jtice.2025.106095","url":null,"abstract":"<div><h3>Background</h3><div>A significant excess of waste sludge from the metal industry and plastic waste from discarded bottles creates the need for meaningful disposal and sustainable utilisation. Therefore, a sustainable solution has been considered to treat waste streams of textile and pharmaceuticals.</div></div><div><h3>Method</h3><div>An iron-based metal-organic framework (Fe-BDC MOF) is synthesised from metals and organic linkers. The synthesised iron-based MOFs efficiently treated dyes and antibiotics in industrial waste streams. Recently, antibiotic and dye removal from pharmaceutical and textile industry wastewater has been urgent from the viewpoint of human health and sustainable environment development. Another Fe-BDC MOF was prepared using commercially available terephthalic acid (Fe-BDC) for comparative analysis.</div></div><div><h3>Finding</h3><div>Developed MOFs were characterised using FTIR, FESEM-EDS, TGA, XRD, XPS, and BET techniques. Additionally, experiments were conducted to assess the adsorption of Norfloxacin (NR) and Methylene blue (MB) dye using developed MOFs. Under optimised conditions [contact time 20 min (NR), 30 min (MB), initial concentration 25 mg/L, temperature 30 °C, dose 0.3 g/L (NR), 1 g/L (MB) and pH (5.5)], according to Langmuir isotherm the developed Fe-BDC MOF shows maximum adsorption capacities of 1123.60 and 256.41 mg/g of NR and MB, respectively. The removal of NR and MB was well fitted with the Freundlich isotherm and pseudo 2nd order model. The outcomes of the thermodynamic study reveal that adsorption is exothermic and spontaneous. The synthesis of the Fe-BDC MOF with PET-derived BDC presents a promising method for addressing environmental PET waste while facilitating the efficient removal of NR and MB from wastewater.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"171 ","pages":"Article 106095"},"PeriodicalIF":5.5,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621362","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}

引用次数: 0

Design of impeller blades for fluid laminar mixing in an unbaffled stirred reactor

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-03-13 DOI: 10.1016/j.jtice.2025.106077

Deyin Gu , Hao Yang , Yinghua Song , Li Wen , Si Liu , Ting Yao

Background

Many studies reported that the isolated zones are obstacles for the fluid laminar mixing process. The key to intensify the laminar mixing process lies in minimizing or eliminating the isolated zone while maximizing the chaotic mixing zone. In this work, dislocated fractal impeller (DF impeller) was applied to minimize the isolated zone and maximize the chaotic mixing zone for fluid laminar mixing process.

Methods

The mixing performance of dislocated pitched-blade impeller (DPB impeller) and DF impeller were explored through numerical simulation and experimentation.

Significant findings

Results showed that the impeller blades with dislocated fractal structure design resulted in a reduction in power consumption and power number compared to the straight impeller blades with the same blade area. Meanwhile, this design could improve the shear action of impeller blade edges on the fluid, enhance the radial and axial velocity, and minimize the pressure differential between its front and rear sides while reducing the recirculation zone behind the impeller blades compared to straight impeller blades under the same operating conditions. In addition, DF impeller could decrease mixing time, reduce the isolated zone and increase the chaotic mixing zone compared with DPB impeller under the same operating conditions.

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引用次数: 0

Natural convection of power law fluid in square cavity equipped with heat-generating solid and submitted to two modes of time-periodic cooling: MRT-LBM simulation

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-03-13 DOI: 10.1016/j.jtice.2025.106067

A. Bourada , Y.K. Benkahla , A. Boutra , D.E. Ameziani

Background

This contribution deals with the numerical analysis of transient natural convection of power law fluid, filling a square cavity, in the presence of volumetric heat generation provided by a circular heat conductor solid, placed in the centre of the cavity. The cavity experiences two modes of time-periodic cooling: sinusoidal and triangular.

Methods

The numerical simulation is conducted using the multiple-relaxation-time lattice Boltzmann method and the boundary conditions at the circular obstacle are treated by coupling the spatial quadratic interpolation to the bounce back condition. The parametric study involves the effect of amplitude (0 ≤ A ≤ 2) and period (0.001 ≤ τ_p ≤ 1) of the time-periodic temperature, oscillation mode (sinusoidal and triangular), Rayleigh number (10³ ≤ Ra ≤ 10⁶), temperature-difference ratio (0 ≤ ΔT* ≤ 40) and power law index (0.7 ≤ n ≤ 1.3).

Significant findings

The results obtained show, on the one hand, that these parameters have a considerable effect on the fluid flow and heat transfer. Furthermore, it is noted that the choice of the cooling mode has an important role in the optimization of heat transfer. On the other hand, The MRT-LBM approach has been validated as effective for addressing such physical problems.

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引用次数: 0

Bioinspired synthesis of Fe2O3 nanoparticles uing Rosa Rugosa flower extract and their application as a potent alternative disinfecting agent against waterborne pathogens within wastewater management

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-03-13 DOI: 10.1016/j.jtice.2025.106079

Mai M. Khalaf , Mohamed Gouda , Manal F. Abou Taleb , Fatima E. Al-Rasheed , Hany M. Abd El-Lateef

Background

The serious health dangers associated with waterborne microorganisms have prompted research into substitute disinfectants.

Methods

In this work, the ferric oxide nanoparticles (Fe₂O₃ NPs) were produced in an green appraoch using Rosa rugosa cv. Plena (RP) extract and evaluated its antibacterial and antibiofilm activities against some pathogens. The synthesized Fe₂O₃ NPs were characterized via several techniques, namely UV–Vis, XRD, TEM, average particle size, zeta potential and SEM-EDX. Furthermore, the effectiveness of phyto-synthesized Fe₂O₃ NPs as a possible disinfectant against common aquatic infections was examined.

Significant findings

The data illustrated the preparation of Fe₂O₃ NPs with small size (67.77 nm). The minimum bactericidal concentration (MBC) of the synthesized Fe₂O₃ NPs against the target pathogens were measured, which showed encouraging inhibitory effects, especially at 2xMIC doses. The bacterial species of E.coli was more susceptible to Fe₂O₃ NPs with MIC 62.5 ± 8.3 μg/mL, while for Listeria monocytogenes, MIC value was 250 ± 15.6 µg/mL. Time-kill kinetics revealed the complete inhibition of bacterial growth within 100 min at 2 × MIC concentrations, while biofilm removal tests showed >90% inhibition at concentrations of 750–1000 µg/mL. Additionally, the Fe₂O₃ NPs eradicated harmful bacteria in wastewater samples with a 6-log reduction in cell viability. These findings emphasize the potential of phyto-synthesized Fe₂O₃ NPs as a sustainable and effective disinfectant for wastewater treatment.

{"title":"Bioinspired synthesis of Fe2O3 nanoparticles uing Rosa Rugosa flower extract and their application as a potent alternative disinfecting agent against waterborne pathogens within wastewater management","authors":"Mai M. Khalaf , Mohamed Gouda , Manal F. Abou Taleb , Fatima E. Al-Rasheed , Hany M. Abd El-Lateef","doi":"10.1016/j.jtice.2025.106079","DOIUrl":"10.1016/j.jtice.2025.106079","url":null,"abstract":"<div><h3>Background</h3><div>The serious health dangers associated with waterborne microorganisms have prompted research into substitute disinfectants.</div></div><div><h3>Methods</h3><div>In this work, the ferric oxide nanoparticles (Fe<sub>2</sub>O<sub>3</sub> NPs) were produced in an green appraoch using <em>Rosa rugosa</em> cv. <em>Plena</em> (RP) extract and evaluated its antibacterial and antibiofilm activities against some pathogens. The synthesized Fe<sub>2</sub>O<sub>3</sub> NPs were characterized via several techniques, namely UV–Vis, XRD, TEM, average particle size, zeta potential and SEM-EDX. Furthermore, the effectiveness of phyto-synthesized Fe<sub>2</sub>O<sub>3</sub> NPs as a possible disinfectant against common aquatic infections was examined.</div></div><div><h3>Significant findings</h3><div>The data illustrated the preparation of Fe<sub>2</sub>O<sub>3</sub> NPs with small size (67.77 nm). The minimum bactericidal concentration (MBC) of the synthesized Fe<sub>2</sub>O<sub>3</sub> NPs against the target pathogens were measured, which showed encouraging inhibitory effects, especially at 2xMIC doses. The bacterial species of <em>E.coli</em> was more susceptible to Fe<sub>2</sub>O<sub>3</sub> NPs with MIC 62.5 ± 8.3 μg/mL, while for <em>Listeria monocytogenes</em>, MIC value was 250 ± 15.6 µg/mL. Time-kill kinetics revealed the complete inhibition of bacterial growth within 100 min at 2 × MIC concentrations, while biofilm removal tests showed >90% inhibition at concentrations of 750–1000 µg/mL. Additionally, the Fe<sub>2</sub>O<sub>3</sub> NPs eradicated harmful bacteria in wastewater samples with a 6-log reduction in cell viability. These findings emphasize the potential of phyto-synthesized Fe<sub>2</sub>O<sub>3</sub> NPs as a sustainable and effective disinfectant for wastewater treatment.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"171 ","pages":""},"PeriodicalIF":5.5,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600939","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}

引用次数: 0

Revisiting the softening and melting behavior of sinter under simulated blast furnace conditions: Part II – Characteristics of microstructure evolution and grain coarsening

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-03-12 DOI: 10.1016/j.jtice.2025.106066

Yu-ning Chiu , Kai-chun Chang , Wen-chien Tsai , Yu-jia Hu , Jia-shyan Shiau , Ke-miao Lu , Tsung-yen Huang , Shan-wen Du , Ping-chieh Cheng , Yi-chen Kuo , Ker-chang Hsieh , Hao-long Chen , Shih-kang Lin

Background

To enhance the mechanistic understanding of softening and melting (S&M) behaviors and their role in determining blast furnace (BF) permeability performance, studying macro- and microstructural evolution under high-fidelity yet not oversimplified BF environments is indispensable.

Methods

Building on Part I, this study establishes experimental conditions that faithfully reproduce BF environments. Leveraging these high-fidelity conditions, we investigate the macro- and microstructural evolution and grain size distribution of metallic Fe and FeO at five temperatures: 1150 °C, 1250 °C, 1330 °C, 1430 °C, and 1550 °C.

Significant findings

Key conclusions link microstructural evolution to softening, melting, and dripping behaviors. From 1150 °C to 1550 °C, Fe and FeO grains undergo significant coarsening, with Fe increasing from 0.5–6.0 µm to 3.5–15.0 µm and FeO from 0.7–6.17 µm to 2.1–9.7 µm by 1430 °C. A critical dripping threshold for FeO droplets (>9.5 µm) in sinter ore shows grain coarsening significantly affects dripping timing and behavior. Additionally, the high melting points of slag phases in sinter ore compared to pellets and lump ores limit FeO droplet formation, resulting in less pronounced dripping behavior. These findings emphasize the need to investigate grain coarsening to understand dripping mechanisms across various burden materials and the potential impact of grain size variations on permeability in conventional versus hydrogen-rich blast furnaces.

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引用次数: 0

Response surface methodology optimized co-pyrolysis of mixed date seeds and chicken bones for bio-oil production

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-03-12 DOI: 10.1016/j.jtice.2025.106070

Marwa H. Altamer , Amena F. Al-Omari , Duaa H. Altamer , Abdelrahman B. Fadhil

Background

Co-pyrolysis of date seeds (DS) and chicken bone (CB) mixture in a fixed bed reactor to produce pyrolytic oil (PO). The process was adjusted using Central Composite Design (CCD) followed by Response surface methodology (RSM) to produce an optimal PO yield.

Methods

To evaluate the pattern and relation between the experimental responses and the process variables, the variables, including temperature (400 °C - 600 °C), feedstock particle size (0.15–0.35 mm), heating rate (10–50 °C/min), and time (40–80 min), were investigated.

Significant Findings

The extreme output of the PO was 65.11 % and was produced at 500 °C using a 0.25 mm particle size and a heating rate of 30 °C/min for 60 min. Quantifying the bio-oil (BO) by GC–MS analysis showed the BO consisted mostly of oxygenated hydrocarbons (73.16 %), including acids (64.16 %), aldehydes and ketone (4.45 %), esters (4.20 %), and alcohols (0.35 %). Other components included hydrocarbons (33.84 % (paraffin, 16.89 %; olefines, 16.3 %; and alkynes, 0.65 %)) and nitrogen compounds (5.79 %). In conclusion, the mixed DSCB can be used as a resource for pyrolysis and produce a complex mixture of acids, esters, and alkanes.

{"title":"Response surface methodology optimized co-pyrolysis of mixed date seeds and chicken bones for bio-oil production","authors":"Marwa H. Altamer , Amena F. Al-Omari , Duaa H. Altamer , Abdelrahman B. Fadhil","doi":"10.1016/j.jtice.2025.106070","DOIUrl":"10.1016/j.jtice.2025.106070","url":null,"abstract":"<div><h3>Background</h3><div>Co-pyrolysis of date seeds (DS) and chicken bone (CB) mixture in a fixed bed reactor to produce pyrolytic oil (PO). The process was adjusted using Central Composite Design (CCD) followed by Response surface methodology (RSM) to produce an optimal PO yield.</div></div><div><h3>Methods</h3><div>To evaluate the pattern and relation between the experimental responses and the process variables, the variables, including temperature (400 °C - 600 °C), feedstock particle size (0.15–0.35 mm), heating rate (10–50 °C/min), and time (40–80 min), were investigated.</div></div><div><h3>Significant Findings</h3><div>The extreme output of the PO was 65.11 % and was produced at 500 °C using a 0.25 mm particle size and a heating rate of 30 °C/min for 60 min. Quantifying the bio-oil (BO) by GC–MS analysis showed the BO consisted mostly of oxygenated hydrocarbons (73.16 %), including acids (64.16 %), aldehydes and ketone (4.45 %), esters (4.20 %), and alcohols (0.35 %). Other components included hydrocarbons (33.84 % (paraffin, 16.89 %; olefines, 16.3 %; and alkynes, 0.65 %)) and nitrogen compounds (5.79 %). In conclusion, the mixed DSCB can be used as a resource for pyrolysis and produce a complex mixture of acids, esters, and alkanes.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"171 ","pages":"Article 106070"},"PeriodicalIF":5.5,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600937","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}

引用次数: 0

Constructing asymmetric mixed matrix membrane with high permeance and antifouling performance by magnetic control of COF-coated Fe3O4 particles

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-03-11 DOI: 10.1016/j.jtice.2025.106080

Yuemin Guang, Ruochen Yuan, Bingjie Zhang, Dingqi Li, Ju Yang, Najun Liu, Yongheng Yin

Background

Nanofiltration membranes are widely used for treating dye wastewater, while two major challenges hinder their application: the trade-off between permeance and selectivity, and membrane fouling.

Methods

Covalent organic frameworks (COFs) can help membranes overcome the trade-off effect, and the combination of positively and negatively charged groups exhibit excellent antifouling properties. In this study, COF-coated Fe₃O₄ particles are synthesized and functionalized with sulfonic acid groups, through magnetically induced surface segregation, a membrane with asymmetric structure is formed. The effects of modified particles on the membrane's structure are systematically investigated. Most importantly, the water permeance, dye rejection, and antifouling properties of as-prepared mixed matrix membranes are thoroughly evaluated.

Significant Findings

The magnetic-assisted method enriches more COFs containing both positively and negatively charged groups on the membrane surface, as a result, the prepared membranes exhibit outstanding performance in water permeance, dye removal and antifouling ability. For example, the P/Z-COF-5 membrane shows enhanced permeance from 65.2 L m⁻² h⁻¹ bar⁻¹ (polyethersulfone, PES) to 165.6 L m⁻² h⁻¹ bar⁻¹, exhibits high rejection of 99.8 % for Eriochrome black T and 96.7 % for Congo red. In addition, the flux recovery ratio of P/Z-COF-5 membrane is 98.2 %, much higher than that of pristine PES (72.9 %).

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引用次数: 0

Sludge-derived biochar applied in peroxymonosulfate (PMS) activation: Regulation of active sites and synergistic production of reaction oxygen species

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-03-10 DOI: 10.1016/j.jtice.2025.106071

Jiawei Liu , Zilian Liu , Rongrong Miao , Yingjun Wang , Liang He , Huajing Zhou , Sheng Liang , Xin Lei , Xiaoyong Deng

Sewage sludges and chlorophenols (e.g., 4-CP) generated from papermaking industries are polluting and hazardous. Nevertheless, the paper mill sludges possessed inherent iron and carbon components is expected to be converted into Fe/C-based peroxymonosulfate (PMS) activator for wastewater purification. In this study, the derived ferric-rich biochar materials paper sludge carbon (PSC) is synthesized via pyrolyzing paper mill sludge to activating PMS for 4-CP degradation in water matrix. The optimal PSC/PMS system exhibits about 100.00% 4-CP degradation efficiency and the kinetic constant reaches 0.1165 min^-1 while 66.82% of Cl^- is shed owing to high mineralization efficiency. Species trapping experiments and electron paramagnetic resonance spectra analysis indicate that the ¹O₂ and O₂^•− species dominate the 4-CP degradation. The high PMS decomposition and 4-CP degradation efficiency attribute to the Fe(II) and abundant defects. This study provides novel strategies for halogen removal and value-added utilization of paper mill sludge in environmental remediation.

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引用次数: 0

Flower-like NiCo2S4 decorated by CdIn2S4 nanoparticles for enhanced photocatalytic hydrogen evolution activity

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2025-03-09 DOI: 10.1016/j.jtice.2025.106042

Yuan Liu , Mengchao Li , Kaiyue Sun, Xiaohui Ma, Liang Geng, Mei Dong, Hualei Zhou

Background

The rapid complexation of photogenerated carriers in sulphides has emerged as a significant challenge in optimizing photocatalytic hydrogen production.

Methods

Flower-like NiCo₂S₄/CdIn₂S₄ (NCSCIS) microspheres were synthesized by hydrothermal treatment and in situ deposition method in this study. CdIn₂S₄ nanoparticles were uniformly decorated on the surface of flower-like NiCo₂S₄ microspheres assembled from nanotubes, forming multi-heterojunctions.

Significant finding

Benefited from the heterostructure, their visible-light photocatalytic activity for hydrogen evolution was notably enhanced compared with that of single CdIn₂S₄. Among them, the hydrogen evolution rate of optimal 15NCSCIS heterojunction composite is 43 times that of independent CdIn₂S₄. Demonstrated by various optical and electrochemical experiments, the heterojunction significantly promoted the separation of photoinduced electron-hole pairs, improved the hydrogen evolution activity, strengthened the visible-light absorption and reduced the electron transfer resistance, thus resulting in the enhancement of photocatalytic activity. The photocatalytic mechanism of Schottky junction was proposed based on their energy band potentials. This work would provide new insights into the design of inexpensive heterojunction photocatalysts with high photocatalytic activity.

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引用次数: 0