Journal of the Taiwan Institute of Chemical Engineers
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2021
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IF 5.876
Xin Li,Shengxiao Zhang,Mingwu Yu,Hu Xu,Jungang Lv,Shuangshuang Yang,Xiaotong Zhu,Li Li
Background It was an effective method and research focus to remove recalcitrant organic pollutants by advanced oxidation processes based on persulfate activation with composite material as heterogeneous catalysts. Methods Fe/N co-doped biochar (Fe/N-BC) was synthesized via one-pot calcination method with anhydrous FeCl 3 , melamine, and grape skin powder as precursors. Characterization results showed that biomass and melamine could anchor iron species on BC matrixes by coordination. Significant findings The Fe/N 0.1 -BC exhibited significant activities toward peroxymonosulfate (PMS) activation, and 20 mg/L RhB can be degraded completely in 10 min with 0.05 g/L of the material and 0.5 g/L PMS. Electron paramagnetic resonance (EPR) study and free radical quenching experiments indicated that singlet oxygen ( 1 O 2 ), sulfate radicals (SO 4 •− ), and hydroxyl radicals (•OH) were the main reactive oxidizing species, and non-radical mechanism and free radical process were considered to be involved in the degradation of the pollutants. Control experiments revealed that the enhanced active sites were mainly ascribed to rich defects as well as the synergistic effect among Fe and N doping into carbon substrate. The Fe/N-BC owned the merits of environmentally friendly raw materials, easy synthesis, and high activation efficiency, exhibiting splendid prospect for environmental application.
研究领域:
环境科学
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材料科学
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高影响因子
JOURNAL OF MATERIALS SCIENCE
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2023
·Vol. 58
·期 31
·12596-12610
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IF 4.5
Liu Jun,Wang Hui,Chang Meng-Jie,Li Wen-Juan,Bai Ge,Xie Heng-Xue,Li Xin,Du Hui-Ling,Song Shi-Jie
MIL-100(Fe) has been demonstrated as a commonly used photocatalyst but is limited by the deficient charge separation efficiency and difficult recovery. In this work, by taking advantages of the strong plasmonic absorption and electron conductivity of Ag nanoparticles, as well as the fast magnetic response of the Fe 3 O 4 , core/shell Ag/Fe 3 O 4 @MIL-100(Fe) (AFM) was facilely prepared by a direct hydrothermal reaction between H 3 btc and Ag/Fe 3 O 4 (AF) for photo-Fenton degradation of RhB assisted by H 2 O 2 . Specifically, the Fe 3 O 4 in AF acted as both ion precursor and protector to inhibit Ag aggregation to obtain uniform and dispersed core/shell AFM. By adjusting the MIL-100(Fe) thickness and the Ag proportion, the optimum AFM exhibits superior photo-Fenton activity to decompose 88.5% RhB within 30 min under visible-light irradiation and H 2 O 2 addition, which is much higher than that of AFM in the presence of either light (58.5%) or H 2 O 2 (46.6%) due to the synergistic effects of visible-light absorption by MIL-100(Fe) and ·OH generation from H 2 O 2 . Moreover, the catalyst can be collected conveniently for its strong magnetic responsibility. This work may be beneficial to the development of effective photo-Fenton catalysts. Graphical abstract A novel magnetically recyclable Ag/Fe 3 O 4 @MIL-100(Fe) with special core/shell structure was facilely synthesized by hydrothermal method with superior photo-Fenton activity for dye degradation.
研究领域:
材料科学
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环境科学
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高影响因子
APPLIED SURFACE SCIENCE
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2023
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IF 6.7
Chan Guo,Jian Lei,Wenjing Geng,Jiayao Lin,Sugang Meng,Sheng Ye,Yujun Zhu,Weiwei Lei,Caijin Huang,Jun Hu,Cheng Chen
Photocatalysis offers a green and promising strategy for light-driven pollutant degradation to address water pollution. Yet, challenges in conversion efficiency and cost-efficiency propel the search for effective metal-free photocatalysts. Here, we employ a ball milling technique using organic solvent molecules to enhance the exfoliation of g-C 3 N 4 nanosheets. Incorporating tetrahydrofuran, with its distinctive five-membered monooxygenase ring structure, endows exfoliated CN nanosheets (TCN) with remarkable electron-donating capabilities, expanding specific surface area and active sites, essential for intricate photocatalytic reactions. Comparative assessments unequivocally establish TCN's superiority, revealing a remarkable 3.6-fold enhancement in RhB dye degradation and a remarkable 99.7 % removal efficiency. TCN demonstrates rapid, complete reduction of heavy metal ions (Cr 6+ ) under natural sunlight within 10 min and exhibits a significant 2.3-fold antibiotic degradation enhancement over pristine CN . This pioneering work unveils the mechanisms behind TCN's superior photocatalytic performance, offering insights into designing advanced photocatalysts for crucial water purification applications.
研究领域:
材料科学
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环境科学
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化学工程
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高影响因子
Journal of Physical Chemistry C
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2015
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IF 4.772
Dong Yang,Yuanyuan Sun,Zhenwei Tong,Yao Tian,Yuanbing Li,Zhongyi Jiang
Inspired by the bioadhesion mechanism found in mussel, a catechol derivative, 3-(3,4-dihydroxyphenyl)propionic acid (diHPP), is employed as both linker and reducer of Ag+ to synthesize the Ag/TiO2 nanotube (Ag/TNT) heterojunction under ambient conditions in this study. In the prepared Ag/TNT composite, Ag nanocrystals about 3.8 nm in diameter distribute over the TNT surface uniformly and form the heterojunction structure with TNT. The diHPP first links to the TNT surface through the bidentate chelation of catechol group with Ti4+ and then acts as both an anchor and a reducer to in situ nucleate and grow Ag nanocrystals on the TNT surface. By adjusting the AgNO3 concentration, the loading amount of Ag nanocrystals on the TNT surface can be controlled easily, and the visible-light absorption ability of Ag/TNT heterojunctions enhances with increasing the Ag loading amount. Moreover, their photocatalytic activity was evaluated by the degradation capability of Rhodamine B (RhB) under visible light. The Ag/TNT heterojunctions exhibit the high visible-light photocatalytic activity, which can almost degrade 100% RhB within 2 h. This excellent performance can be attributed to the local electric field caused by the surface plasmon resonance (SPR) of Ag nanocrystals and the high adsorption capability of TNTs with large specific surface area.
研究领域:
材料科学
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环境科学
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纳米技术
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Jingkai Min,Hongshun Hao,Yirui Zhao,Yutong Hu,Qiqi Huang,Fuxiao Zhu,Gongliang Zhang,Jingran Bi,Shuang Yan,Hongman Hou
In the present study, NaNbO 3 -CdS nanorods composites with pyroelectric effect were used to degrade RhB solution and sterilize Salmonella under room-temperature cold-hot cycles. The pyrocatalytic decomposition rate of NaNbO 3 -CdS reached 90 % under 45 cold-hot (25–55 °C) cycles while the antibacterial rate of NaNbO 3 -CdS also achieved 90 % under 45 cold-hot (17–37 °C) cycles. Compared with the pyrocatalytic effect of single NaNbO 3 , with the hole’s radicals and superoxide radicals as the main active species, the pyrocatalytic effect of the NaNbO 3 -CdS was significantly enhanced. It is mainly attributed to its surface electrons being captured by CdS, thereby reducing the recombination probability of electron pairs. After four repeated experiments, the high pyrocatalytic activity still maintained, which indicated that the property of NaNbO 3 -CdS composites was stable. The composite nanocatalyst has potential in the degradation of dye pollution and sterilization by temperature difference.
研究领域:
材料科学
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环境科学
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纳米技术
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催化
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微生物学
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高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Si Jiang,Jun Xiao,Jieyi Tan,Xiangqi Li
Constructing heterojunctions is an important strategy for enhancing the separation efficiency of charge carriers in graphitic carbon nitride (g-C 3 N 4 ). Meanwhile, immobilization enables the recycle of g-C 3 N 4 -based photocatalysts from wastewater. Herein, a visible light-responsive MoS 2 and SnO 2 co-modified g-C 3 N 4 ternary heterostructure was synthesized via one-pot calcination and subsequently immobilized in a modified bacterial cellulose (BC) aerogel through freeze-drying. The prepared ternary heterojunction exhibited enhanced visible light-harvesting capacity and charge separation efficiency due to intimate interfaces and the synergy effect of different components. It showed a degrade rate constant 3.43 times higher than that of g-C 3 N 4 , and degraded 99.3 % of RhB (30 mg/L) at pH 6.5 after 30 min of irradiation, and 99.1 % at pH 5 after 15 min. Owing to dispersion improved by sodium dodecyl benzene sulfonate (SDBS) and the strength and hydrophobicity enhanced by methoxytrimethylsilane (MTMS), the prepared aerogel degraded 98.7 % of RhB (30 mg/L) at 60 min irradiation, and maintained 94.0 % after 6 cycles. This work demonstrates a highly efficient MoS 2 -SnO 2 -g-C 3 N 4 ternary photocatalyst and a practical immobilization route for application in purification of dye wastewater.
研究领域:
材料科学
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环境催化
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光催化
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纳米材料
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废水处理
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2022
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IF 6.633
Quan Chen,Lunan Wu,Xiaoli Zhao,Xiu-Jie Yang
Zn-Ti layered double oxide (LDO) nanosheets were synthesized by a simple co-precipitation-calcination process for the enhanced photocatalytic degradation of methyl orange (MO), rhodamine B (RhB) and methylene blue (MB). ZnTi-LDOs nanosheets present higher photocatalytic efficiency for MO, RhB and MB removal, which is 5.4, 4.4 and 6.7 times of that of Zn-Ti layered double hydroxide (LDH), respectively. The photocatalytic activity of synthesized ZnTi-LDOs is greatly affected by the mole ratio of Zn/Ti, calcination temperature and pH value. It is found that the formation of ZnO/ZnTiO 3 heterojunction in ZnTi-LDOs could effectively accelerate the rapid separation of charge carriers, and thus enhance the photocatalytic activity via enlarging the photoresponse range. The possible charge transfer mechanism for photocatalytic degradation of organic dyes by ZnTi-LDOs was proposed based on the active species test and UV–Vis diffuse reflectance spectra. The results of active species trapping experiments showed that ‧OH, ‧O 2 − , h + , e − all had effect on the degradation of RhB , and ‧OH played a major role. This study provides a new insight for the photocatalytic degradation of organic pollutants from wastewater by ZnTi-LDOs.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
BIOMASS & BIOENERGY
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2026
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IF 7
Yingying Zhu,Zhong Wang,Jinze Li,Yumeng Ren,Chao Zeng,Geng Chen
Mg-Zn-Fe LDH was anchored on phosphate-modified reed straw biochar. • Mg 1 Zn 1 Fe-LDH@PBC reached a surface area of 394.466 m 2 g −1 . • The adsorbent efficiently removed RhB, MO, and OTC from water. • Maximum RhB adsorption capacity reached 659.2 mg g −1 . • Removal efficiency remained around 70% after five cycles. Sustainable conversion of waste biomass into high-performance adsorbents provides an effective route for organic wastewater remediation. In this study, phosphate-modified reed straw biochar-supported layered double hydroxide composites (LDH@PBC) were synthesized via a facile co-precipitation method. Binary and ternary LDHs containing Mg 2+ , Zn 2+ , and Fe 3+ were constructed on the biochar matrix, and their adsorption performance toward rhodamine B (RhB), methyl orange (MO), and oxytetracycline (OTC) was systematically evaluated. The optimized Mg 1 Zn 1 Fe-LDH@PBC exhibited a well-developed porous structure, abundant surface functional groups, and the highest specific surface area of 394.466 m 2 g −1 . Owing to the synergistic effects of phosphate-modified biochar and Mg-Zn-Fe LDH nanosheets, the composite maintained stable adsorption efficiency over a broad pH range. The optimized Mg 1 Zn 1 Fe-LDH@PBC achieved a maximum experimental RhB adsorption capacity of 659.2 mg g −1 under the optimized dosage condition. In contrast, Langmuir isotherm fitting gave theoretical maximum monolayer adsorption capacities of 944.898, 696.552, and 303.146 mg g −1 for RhB, MO, and OTC at 298 K, respectively. Kinetic and isotherm analyses suggested that the adsorption process may be associated with multiple interactions, including electrostatic attraction, ion exchange, hydrogen bonding, π–π interactions, and possible surface complexation. In addition, the removal efficiency remained around 70% after four adsorption–desorption cycles, indicating favorable reusability. This work highlights a promising biomass-derived LDH/biochar adsorbent for efficient and sustainable removal of multiple organic pollutants from water.
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高影响因子
OPTICAL MATERIALS
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2025
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IF 4.2
Bo Li,Yujia Liu,Lishuai Song,Yuyu Zhang,Nan Liu,Zequan Li
Absrtact This study successfully constructs a g-C 3 N 4 /TiO 2 heterojunction and its Pt nanocluster-modified composite (Pt C –CN–TiO 2 ) through an interface engineering strategy, systematically investigating their photocatalytic RhB degradation performance and mechanisms. Under visible light irradiation, Pt C –CN–TiO 2 achieves a RhB degradation efficiency of 99.29 % within 160 min, with a 34.3 % increase in reaction rate constant compared to the Pt-free catalyst. Mechanistic studies reveal that Pt acts as an electron sink, facilitating the generation of ·O 2 − , while inducing interfacial electronic structure renormalization to enhance surface hydroxyl adsorption and oxygen vacancy activity. Cycling experiments confirm its exceptional stability. This work provides novel interface engineering insights and theoretical foundations for designing highly efficient and stable solar-driven photocatalysts.
研究领域:
材料科学
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环境科学
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纳米技术
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光催化
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高影响因子
CATALYSIS LETTERS
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2021
·Vol. 152
·期 4
·1145-1159
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IF 3.186
Yu Guiyun,Zhao Yefan,Zhang Yulong,Wu Jiaxin,Liu Chao
There are increasing concerns of environmental-pollution and energy issues. Herein, an exfoliation-restacking process was firstly employed to synthesize H + -restacked H + Ti 2 NbO 7 − nanosheets (HTNS), and then heated with melamine at 510 °C to obtain direct Z-scheme layered N-doped H + Ti 2 NbO 7 − /g-C 3 N 4 (TCN) heterojunctions with an increased specific surface area. Two-dimensional (2D) g-C 3 N 4 material was in-situ formed on the surface of HTNS to achieve a layered heterostructure between two components, which could maximize interfacial contact area and minimize interfacial distance for the efficient charge carrier separation. Simultaneously, the surface of HTNS was doped by nitrogen atoms to form visible-light-responsive N-doped HTNS. All TCN x ( x = 1, 2 and 3) composites exhibited the enhanced photocatalytic activity for both hydrogen (H 2 ) production and rhodamine B (RhB) degradation. As an optimal sample, the resulted TCN2 composite exhibited the best photocatalytic efficiency for H 2 production and RhB degradation. The enhanced photocatalytic activity was assigned to the combined effects of layered heterojunction, N-doping and large specific surface area. According to trapping experiments and electron spin resonance (ESR) spectra, the holes (h + ), superoxide (·O 2 − ) and hydroxyl (·OH) radicals were responsible for photocatalytic RhB degradation and especially the ·O 2 − was the key active specie. A possible charge transfer pathway was analyzed in detail. This work will hopefully provide some guidance on designing Z-scheme layered heterojunction photocatalyst systems with highly photocatalytic efficiency. Graphical Abstract Direct Z-scheme layered N-doped H + Ti 2 NbO 7 − /g-C 3 N 4 heterojunction photocatalysts were constructed by a three-step exfoliation-restacking-calcination process, showing the highly photocatalytic efficiency for H 2 production and RhB degradation under visible light due to the synergistic effects of layered heterojunction, N-doping and large specific surface area.
研究领域:
材料科学
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环境科学
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能源科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Jun Liu,Hui Wang,Meng-Jie Chang,Meng Sun,Zhi-Wei He,Cong-Miao Zhang,Wen-Yao Zhu,Jia-Liang Chen,Hui-Ling Du,Long-Gui Peng,Zhen-Min Luo,Li Zhang
Magnetically separatable CoFe 2 O 4 /BiOCl (CFO/BOC) fibers were facilely prepared by solvothermal growth of BiOCl on hollow electrospun CoFe 2 O 4 nanofibers in a weak reduction ethylene glycol (EG) solvent for visible light photocatalytic degradation of various contaminants. Due to the defect level resulted from the oxygen vacancies (OVs), evident visible light response and enhanced charge transfer are achieved both for the solo BiOCl spheres and nanosheets on the CoFe 2 O 4 fibrous support. The optimum CFO/BOC synthesized at 160 °C with a precursor concentration of 50 mM shows outstanding photocatalytic activity to degrade different pollutants of Rhodamine B (RhB, 92.9%), Norfloxacin (NOR, 75.5%), and Cr(VI) (78.0%) within 2 h under visible light. The CoFe 2 O 4 nanofibers are not pivotal for the photocatalytic process, but mainly contribute to the photocatalysis as magnetic support, ensuring the CFO/BOC no aggregation and easy collection under an external magnet. In contrast, the OVs play an important role in the visible light absorption , reactive oxygen species generation and redox process during the photocatalytic process. In detail, both photosensitization of RhB and species of h + and·O 2 - contribute to the degradation of RhB, while NOR decomposition is accomplished by three species (h + ,·O 2 - ,·OH). In addition, electrons are the main reactive species for the photoreduction of Cr(VI). Compared to current reported CoFe 2 O 4 /BiOI photocatalysts , significant advances for the CFO/BOC are obtained not only for the cheap BiOCl with OVs for the photocatalytic application, but also much clearer investigation of more details of CFO/BOC photocatalysts such as light absorption, charge transfer and active species for the degradation of various pollutants.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
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2023
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IF 3.9
Feng Liu,Qiongsi Yang,Qiushi Tang,Qi Peng,Yanwu Chen,Yingpeng Huo,Qinyu Huang,Qi Zuo,Nan Gao,Longwen Chen
Soy protein isolate-based double network spheres (SPIDNS) were designed and adopted for the first time for Rhodamine B (RhB) dye removal from wastewater. The SPIDNS were prepared through the aziridine crosslinker and the Ca 2+ ionic double crosslinking method with major crosslinking agents of soy protein isolate and sodium alginate , in which aziridine crosslinker was also employed as a modifier to regulate the mechanical strength. The physicochemical properties of the materials were explored by numerous technologies, including SEM NMR, FT-IR, and XPS , which confirmed the chemical and physical crosslinked networks of SPIDNS being established after aziridine crosslinker and Ca 2+ ionic crosslinking process. Adsorption performances for RhB removal were investigated under various conditions by using SPIDNS with different dosages of aziridine crosslinker for 0%, 1.8%, 3.6%, 5.3%, 6.9%, and 8.5%. Experimental results demonstrated that the mechanical stability of the adsorbent was enhanced with increasing the amount of aziridine crosslinker from 0% to 8.5%; whereas, the adsorption capacity decreased from 190 to 120 mg/g. Therefore, a compromise between the removal efficiency and the mechanical strength should be taken into account. Studies of adsorption kinetics , isotherms, and thermodynamics displayed that the spontaneous RhB adsorption on SPIDNS was well described by a pseudo-second-order kinetic model and Langmuir isotherm model with monolayer adsorption behavior , for which both the correlation coefficients R 2 were higher than 0.99. Moreover, electrostatic interactions between the positively charged RhB molecules and the negatively charged SPIDNS were proposed as the principal adsorption mechanism, which was confirmed by Zeta potential analysis. The good mechanical stability and spherical porous structure make the SPIDNS with reliability and potential for practical application.
研究领域:
环境科学
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材料科学
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高影响因子
危险品化学品经营许可证（带存储）