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Piezoelectric-enhanced BiOBr/UiO-66-NH2（Hf） photocatalysts for purification of mixed pollutants

Science China Technological Sciences 2025年第5期68卷 91-105页

作者： Tingting YU Chenyu YANG Ran DENG Yonghang ZHANG Jiajun LI Tao YANG Jizhou JIANG School of Environmental and Chemical Engineering Jiangsu Ocean University School of Materials Science and Engineering Key Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationWuhan Institute of Technology

The simultaneous purification of multiple mixed pollutants holds significant practical value in addressing the growing environmental challenges of today. In this work, UiO-66-NH2（Hf） octahedrons were successfully synthesized and grown on BiOBr nanosheets to form a novel heterojunction, BiOBr/UiO-66-NH2（Hf）. This BiOBr/UiO-66-NH2（Hf） heterojunction exhibits enhanced photocatalytic degradation and reduction activities. Specifically, the degradation rate of tetracycline hydrochloride（TC） reached 84.8%, while the reduction efficiency of Cr（Ⅵ） approached 100%, demonstrating the material's effectiveness in simultaneously purifying mixed pollutants. Furthermore, when ultrasonic force was applied, the degradation rate of TC increased from 57.1% to 84.8%, and the reduction rate of Cr（Ⅵ） improved from 73.5% to 100%. These results highlight the material's excellent piezoelectric properties, which were confirmed through density functional theory calculations and piezoresponse force microscopy. This work introduces a novel piezoelectric-coupled photocatalyst that offers a new strategy for the efficient purification of mixed pollutants. Additionally, it demonstrates that TC can promote the reduction of Cr（Ⅵ） in place of hole quenchers, while simultaneously undergoing degradation. This approach reveals promising prospects for the effective removal of mixed pollutants.

关键词： piezoelectric effect tetracycline hydrochloride photocatalytic degradation Cr(VI) reduction mixed pollutant purification

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Formation of Micro- and Macro-segregation and Precipitation of Iron-Phosphide during the Solidification of High Phosphorous and Hyper-peritectic Steel

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Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan 2025年第3期111卷 175-186页

作者： Harada, Hiroshi Sugimoto, Kennya Takayama, Takuya Department of Material Design Innovation Engineering Graduate School of Engineering Nagoya University Japan Faculty of Engineering Nagoya University Japan Process Research Laboratories Research & Development Nippon Steel Corporation Japan

In the production of high strength steel, it is necessary to improve the inner quality of steel slab. Among of the internal defects, the center segregation deteriorates the ductility and fatigue strength of high strength steel. Therefore, it is necessary to understand the generation mechanism of center segregation and develop the countermeasure technologies. In the center-segregated region of high phosphorous and hyper-peritectic steel slabs, iron-phosphide may be observed. However, the precipitation mechanism of iron-phosphide has not been fully clarified. Therefore, in this study, in order to clarify the formation mechanism of micro- and macro-segregation in the final solidification of CC slab, the melting behavior of the center segregation region of high phosphorous and hyper peritectic steel slab has been investigated by using high temperature observation equipment installed with the image furnace. Additionally, the enrichment of solute in the inter-dendritic region has been analyzed by using micro- segregation model with consideration of delta-gamma transition of steel. Under the assumption that the enriched solute in the inter dendritic region was transferred to the final solidification region because of fluid flow and the center-segregation was formed, the re-solidification of micro-segregated liquid was analyzed by using the modified micro-segregation model. At the same time, the possibility of precipitation of iron-phosphide was examined by using solubility limit of iron-phosphide. Moreover, under the basis of Fe-C-P ternary eutectic solidification system, the precipitation mechanism of iron-phosphide during the formation of center segregation was discussed (Figure Presented). © 2025 The Iron and Steel Institute of Japan.

关键词： Eutectics

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Facile fabrication of NiCo-hydroxysulfide nanosheets array for electrocatalytic urea oxidation

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Science China(Technological Sciences) 2025年第1期68卷 218-228页

作者： Jing ZOU Chang LIU Kun XIANG Qiong LI Shihao DAI Jizhou JIANG School of Chemistry and Environmental Engineering School of Environmental Ecology and Biological EngineeringKey Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationNovel Catalytic Materials of Hubei Engineering Research CenterWuhan Institute of TechnologyWuhan 430205China

Urea oxidation reaction(UOR)instead of anodic oxygen evolution reaction(OER)is considered an effective way to reduce energy consumption in electrocatalytic water splitting for hydrogen ***,the slow rate of reaction of UOR,which entails a procedure of transferring six electrons,has hindered its widespread ***,it is crucial to design highly effective electrocatalysts for the implementation of ***,a novel NiCo-hydroxysulfide(NiCo-HOS)electrocatalyst has been reported for UOR,which is obtained by the exchange of sulfur ions in NiCo layered double hydroxide(NiCo-LDH)nanosheets at room *** from the sulfurization process,the composition,electronic structure,and surface properties of electrocatalysts have undergone significant changes and *** sulfurization treatment,the resulting NiCo-HOS showed enhanced chemical resistance to alkaline electrolytes and improved electrical *** a 40 h operation test,it maintained high stability and provided a stable current density of 100 mA cm^(-2)at a relatively low potential of 1.33 V(***)in a solution of 1 mol L^(-1)KOH+0.5 mol L^(-1)***,the anode electrolytic product is analyzed through gas chromatography(GC),and N_2 is detected as the product without the presence of CO,indicating that the urea has undergone complete oxidation.

关键词： urea oxidation reaction NiCo-hydroxysulfide electrocatalyst hydrogen

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Biomass-derived adsorbents and nanocomposites for wastewater treatment

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Materials Today: Proceedings 2023年 90卷 18-29页

作者： Kshirsagar D. Thanekar P. Balapure K. Bhandari V.M. Chemical Engineering and Process Development Division CSIR-National Chemical Laboratory Pune 411008 India

Newer biomass-derived adsorbents were developed from green pods of Cassia fistula apart from further nano-metal (Cu, Fe oxide, Ni) and acid modifications. The adsorbents were characterized by FE-SEM, HR-TEM, Powder XRD, BET and FTIR analysis. Removal studies on two different dyes, Malachite green and Congo red, revealed a very high adsorption capacity for the removal of malachite green dye, ∼1355 mg/g for Cu-nanocomposite, 661 mg/g for Fe-nanocomposite and 456 mg/g for unmodified adsorbent; also an order of magnitude, 2000% higher than the reported commercial carbon adsorbents. The results clearly highlight utility of bio-nanocomposites for wastewater treatment and dye removal. © 2023

关键词： Adsorption Dye removal Effluent treatment Nanomaterial Pollution control

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High concentration of Ti^(3+)in C-TiO_(x)nanosheets boosting efficient photodegradation

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Science China(Technological Sciences) 2025年第3期68卷 156-166页

作者： Chongbei WU Xuan LI Haibin WANG Jiaxin TANG Shuai WEI Yuanyuan WU Aobing WANG Jizhou JIANG Hebei Key Laboratory of Man-machine Environmental Thermal Control Technology and Equipment Hebei Vocational University of Technology and EngineeringXingtai054000China School of Materials Science and Engineering Key Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationWuhan Institute of TechnologyWuhan430205China

Semiconductor photocatalysis holds significant promise for addressing dye-pollution in ***,the efficiency of photocatalytic water purification is constrained by the weak light absorption capacity and low active site distribution of *** a bottom-up approach,carbon-doped TiO_(x)(C-TiO_(x))nanosheets with high concentrations of Ti^(3+)active sites were fabricated by etching the Al element in Ti_(3)Ai C_(2)with H_(2)O_(2).Experimental evidence demonstrates that the optimal C-TiO_(x)nanosheets exhibit high activity for the photocatalytic degradation of methylene blue,achieving a degradation rate of 100%within 50 *** introduction of carbon into the C-TiO_(x)nanosheets induces a red shift in the absorption edge,boosting the migration of photo-generated charge ***,there is a significant correlation between the concentration of Ti^(3+)active sites and the density of oxygen vacancies in the C-TiO_(x)nanosheets,which synergistically influence the photocatalytic degradation performance of MB dye wastewater.

关键词： bottom-up strategies C-TiO_(x)nanosheets high-concentrations Ti^(3+) photocatalytic degradation

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RSscore:Reaction superiority learned from reaction mapping hypergraph

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Chinese Journal of Chemical engineering 2024年第10期74卷 203-215页

作者： Chenyang Xu Lijuan Guo Kang Zhou Hai Yu Chaoliang Wei Fengqi Fan Lei Zhang State Key Laboratory of Fine Chemicals Frontiers Science Center for Smart Materials Oriented Chemical EngineeringInstitute of Chemical Process Systems EngineeringSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China PetroChina Lanzhou Lubricating Oil Research&Development Institute Lanzhou 730060China

The selection of chemical reactions is directly related to the quality of synthesis pathways,so a reasonable reaction evaluation metric plays a crucial role in the design and planning of synthesis *** reaction conditions also need to be considered in synthesis pathway design,a reaction metric that combines reaction time,temperature,and yield is required for chemical reactions of different reaction *** this study,a chemical reaction graph descriptor which includes the atom-atom mapping relationship is proposed to effectively describe ***,through pre-training using graph contrastive learning and fine-tuning through supervised learning,we establish a model for generating the probability of reaction superiority(RSscore).Finally,to validate the effectiveness of the current evaluation index,RSscore is applied in two applications,namely reaction evaluation and synthesis routes analysis,which proves that the RSscore provides an important agents-considered evaluation criterion for computer-aided synthesis planning(CASP).

关键词： Computer-aided synthesis planning Neural networks Reaction evaluation indicator Reaction graph Graph contractive learning

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Ni-Co doped TiO2 catalyst for efficient photocatalytic degradation of Malachite Green under UV and direct sunlight

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Environmental Science and Pollution Research 2025年 1-16页

作者： Mhalshekar, Krushika Pawar, Vivek Gaydhane, Mrunalini Sontakke, Sharad Materials and Process Development Laboratory Department of Chemical Engineering Birla Institute of Technology and Science K. K. Birla Goa Campus Goa Pilani403726 India Department of Chemical Engineering Thapar Institute of Engineering and Technology Punjab Patiala147004 India

In the present study, combustion-synthesized TiO2 nanoparticles were wet impregnated with Ni, Co, and Ni-Co, respectively. The photocatalytic performance of synthesized catalysts was evaluated against Malachite Green dye. The synthesized materials were characterized for crystallite size, surface morphology, elemental composition, and band gap using X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, and ultra-violet diffused reflectance spectroscopy, respectively. The optimum parameters for maximum degradation were found by examining the effects of catalyst loading, initial dye concentration, and light intensity. A comparative analysis of Ni-doped, Co-doped, and Ni-Co-doped TiO2 photocatalysts was conducted. The results indicate superior photocatalytic activity of Ni-Co doped TiO2 among the catalysts investigated under UV light. The degradation kinetics was studied, and the underlying degradation mechanism was proposed with the help of LC–MS analysis. Furthermore, a comparative study on the degradation under solar radiation using Ni-Co/TiO2 was conducted. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： Energy dispersive spectroscopy

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Strategically designing and fabricating nitrogen and sulfur Co-doped g-C3N4 for accelerating photocatalytic H2 evolution

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材料科学技术（英文版） 2025年第5期208卷 111-119页

作者： Haitao Wang Lianglang Yu Jiahe Peng Jing Zou Jizhou Jiang School of Chemistry and Environmental Engineering School of Environmental Ecology and Biological EngineeringKey Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationNovel Catalytic Materials of Hubei Engineering Research CenterWuhan Institute of TechnologyWuhan 430205China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China

Doping engineering is an effective strategy for graphitic carbon nitride(g-C3N4)to improve its photocat-alytic hydrogen evolution reaction(HER)*** this work,a novel nitrogen and sulfur co-doped g-C3N4(N,S-g-C3N4)is elaborately designed on the basis of theoretical predictions of first-principle density functional theory(DFT).The calculated Gibbs free energy of adsorbed hydrogen(ΔGH·)for N,S-g-C3N4 at the N-doping active sites is extremely close to zero(0.01 eV).Inspired by the theoretical predictions,the N,S-g-C3N4 is successfully fabricated through ammonia-rich pyrolysis synthesis strategy,in which ammonia is in-situ obtained by pyrolyzing *** characterizations indicate that the N,S-g-C3N4 possesses high specific surface area,outstanding light utilization,good hydrophilicity,and efficient carrier transfer ***,the N,S-g-C3N4 displays an extremely high H2 evolution rate of 8269.9 μmol g-1 h-1,achieves an apparent quantum efficiency(AQE)of 3.24％,and also possesses outsatnding *** calculations further demonstrate that N and S dopants can not only introduce doping energy level to reduce the band gap,but also induce charge redistribution to facilitate hydrogen adsorption,thus promoting the photocatalytic HER ***,femtosecond transient absorption(fs-TA)spectroscopy further corroborates the efficient photogenerated carrier transport of N,*** research highlights a promising and reliable strategy to achieve superior photocatalytic activity,and exhibits significant guidance for precise designing high-efficiency photocatalysts.

关键词： Theoretical predictions g-C3N4 N and S co-doping Photocatalytic H2 evolution

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Experimental Study of Selective Batch Bio-Adsorption for the Removal of Dyes in Industrial Textile Effluents

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Journal of Renewable Materials 2025年第1期13卷 127-146页

作者： Zakaria Laggoun Amel Khalfaoui Kerroum Derbal Amira Fadia Ghomrani Abderrezzaq Benalia Antonio Pizzi Laboratory of Environmental Process Engineering(LIPE) Department of Environmental EngineeringFaculty of Engineering ProcessUniversity Salah Boubnider-Constantine 3New City Ali MendjeliConstantine25000Algeria Laboratory of Process Engineering for Sustainable Development and Health Products(GPDDPS) Department of Process EngineeringNational Polytechnic School of ConstantineConstantine25000Algeria Physics of Matter and Radiation Laboratory(LPMR) Department of Process EngineeringFaculty of Science and TechnologyUniversity Mohamed Cherif MessaadiaSouk Ahras41000Algeria Higher Normal School of Constantine Ali Mendjeli Nouvelle VilleConstantine25000Algeria Laboratoire d’Etude et Recherche sur le Matériau Bois(LERMAB) Ecole Nationale Supérieure des Technologies et Industries du Bois(ENSTIB)University of LorraineEpinal88000France

This research aims to study the bio-adsorption process of two dyes,Cibacron Green H3G(CG-H3G)and Terasil Red(TR),in a single system and to bring them closer to the industrial textile discharge by a binary mixture of two dyes(TR+CG-H3G).The Cockle Shell(CS)was used as a natural *** characterizations of CS were investigated by Fourier transform infrared(FTIR),X-ray diffraction(XRD),scanning electron microscopy(SEM),energy-dispersive X-ray spectroscopy(EDX)and Brunauer–Emmett–Teller(BET).The adsorption potential of Cockle Shells was tested in two cases(single and binary system)and determined by:contact time(0–60 min),bio-adsorption dose(3–15 g/L),initial concentration(10–300 mg/L),temperature(22–61°C)and pH solution(2–12).The study of bio-adsorption(equilibrium and kinetics)was conducted at 22°*** kinetic studies demon-strated that a pseudo-second-order adsorption mechanism had a good correlation coefﬁcient(R2≥0.999).The Langmuir isotherm modeling provided a well-deﬁned description of TR and CG-H3G bio-adsorption on cockle shells,exhibiting maximum capacities of 29.41 and 3.69 mg/g respectively at 22°*** thermodynamic study shows that the reaction between the TR,CG-H3G dyes molecules and the bio-adsorbent is exothermic,spontaneous in the range of 22–31°C with the aleatory character decrease at the solid-liquid *** study of selectivity in single and binary systems has been performed under optimal operating conditions using the industrial textile rejection pH(pH=6.04).CG-H3G dye is found to have a higher selectivity than TR in single(0–60 min)and binary systems with a range of 6–45 min,as shown by the selectivity *** was discovered that CS has the capability to remove both CG-H3G and TR dyes in both simple and binary systems,making it a superior bio-adsorbent.

关键词： Cockle shells bio-adsorption binary system dyes cibacron green terasil red selectivity

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Built-in electric field intensified by photothermoelectric effect drives charge separation over Z-scheme 3D/2D In_(2)Se_(3)/PCN heterojunction for high-efficiency photocatalytic CO_(2) reduction

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Journal of Materials Science & Technology 2024年第12期179卷 251-261页

作者： Hongjun Dong Lei Tong Pingfan Zhang Daqiang Zhu Jizhou Jiang Chunmei Li Institute of Green Chemistry and Chemical Technology School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China School of Environmental Ecology and Biological Engineering Key Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationNovel Catalytic Materials of Hubei Engineering Research CenterWuhan Institute of TechnologyWuhan 430205China

It is a challenging issue to further drive charge separation through the oriented design of Z-scheme het-erojunction in the exploitation of cost-effective photocatalytic *** this contribution,the unique Z-scheme 3D/2D In_(2)Se_(3)/PCN heterojunction is developed through implanting In_(2)Se_(3) microspheres on PCN nanosheets using an in situ growth technique,which acquires the effective CO generation activity from photocatalytic CO_(2) reduction(CO_(2)R).The CO yield of 4 h in the CO_(2)R reaction over the optimal In_(2)Se_(3)/PCN-15 sample reaches up to 11.40 and 2.41 times higher than that of individual PCN and In_(2)Se_(3),*** greatly enhanced photocatalytic performance is primarily the improvement of photo-generated carrier separation *** be more specific,the formed built-in electric field is signifi-cantly intensified by producing the temperature difference potential between In_(2)Se_(3) and PCN owing to the photothermoelectric effect of In_(2)Se_(3),which actuates the high-efficiency separation of photogenerated charge carriers along the Z-scheme transfer path in the In_(2)Se_(3)/PCN *** effective strat-egy of enhancing the built-in electric field to drive photogenerated charge separation proposed in this work opens up an innovative avenue to design Z-scheme heterojunction applied to high-efficiency pho-tocatalytic reactions,such as hydrogen generation from water splitting,CO_(2)R,and degradation of organic pollutants.

关键词： In_(2)Se_(3)/PCN Z-scheme heterojunction Photocatalytic CO_(2) reduction Enhanced built-in electric field Photothermoelectric effect

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