JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Zehao Li,Wangzhe Xia,Rui Qin,Fangping Wu,Zhihan Cai,Jianhong Wu
In the domain of water treatment, photocatalytic degradation presents a compelling approach. However, the quest for photocatalysts that exhibit superior solar energy absorption and conversion remains a challenge. We explore rod-shaped bismuth-rich chalcohalide photocatalyst BiSCl–Bi 6.88 S 8·64 Cl 3.36 by simple temperature control and demonstrate the proficiency in degrading organic pollution under visible light. BiSCl–Bi 6.88 S 8.64 Cl 3.36 nanorods manifest a composition-tailored band gap, effectively spanning the visible spectrum. Remarkably, in the absence of cocatalysts and sacrificial agents, BiSCl–Bi 6.88 S 8·64 Cl 3.36 exhibit exceptional photocatalytic degradation rate of 99.8%, which is comparable to that of BiSBr (98.6%). Moreover, the photodegradation rate of BiSCl–Bi 6.88 S 8·64 Cl 3.36 (0.091 min −1 ) is higher than that of BiSBr (0.048 min −1 ). The rate position it among the most effective known photocatalysts, with the generation of superoxide anion radicals (•O 2 − ) and photogenerated holes (h + ) as the primary active species. Notably, the enhanced photocatalytic activity of BiSCl–Bi 6.88 S 8·64 Cl 3.36 is attributed to the high number of Bi centers and the higher electronegativity, which induces a more polar crystal structure.
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高影响因子
LANGMUIR
·
2025
·
IF 3.9
Chunmiao Fan,Dengjie Zhong,Yunlan Xu
In this study, CoFe-PBA-loaded NiFe-LDH (NiFe-LDH@CoFe-PBA) was synthesized and employed to catalyze peroxymonosulfate (PMS) to degrade rhodamine B (RhB). That the composite material was successfully synthesized was confirmed through complementary characterization techniques including energy-dispersive spectrometry, Fourier transform infrared spectroscopy, and X-ray diffraction analyses. The elimination efficiency of RhB reached 98.99% within 15 min under the conditions of an initial RhB concentration of 50 mg L–1, a catalyst concentration of 0.2 g L–1, a PMS concentration of 0.2 g L–1, and an initial pH of 6.36. The characterization results revealed that CoFe-PBA improved the dispersibility of NiFe-LDH and exposed more active sites, which made NiFe-LDH@CoFe-PBA have higher current density and electron transfer ability. In the composite, Co, Fe, and Ni were the catalytic centers to activate PMS, and the redox between Co3+/Co2+, Fe3+/Fe2+, and Ni3+/Ni2+ enhanced the production of reactive oxygen species (ROS: 1O2, O2•–, •OH, and SO4•–). Among them, 1O2 was determined to be the predominant reactive species responsible for RhB degradation. This study proposes a novel methodology for designing and synthesizing simple, efficient, stable, and environmentally friendly heterogeneous metal-based catalysts.
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PubMed
高影响因子
Catalysts
·
2020
·Vol. 10
·期 12
·1480
·
IF 3.52
Wei Guo,Libin Yang,Jinghao Lu,Peng Gao,Wenjing Li,Zhiying Feng
To effectively improve photocatalytic activity, the morphology and crystallinity of semiconductor photocatalysts must be precisely controlled during the formation process. Self-aligned Nb2O5nanotube arrays have been successfully fabricated using the electrochemical anodization method. A novel growth mechanism of Nb2O5nanotubes has been proposed. Starting from the initial oxidation process, the “multi-point” corrosion of fluoride ions is a key factor in the formation of nanotube arrays. The inner diameter and wall thickness of the nanotubes present a gradually increasing trend with increased dissociative fluorine ion concentration and water content in the electrolyte. With dehydroxylation and lattice recombination, the increased crystallinity of Nb2O5represents a reduction of lattice defects, which effectively facilitates the separation and suppresses the recombination of photo-generated carriers to enhance their catalytic degradation activity.Keywords:Nb2O5;nanotube;growth mechanism;crystalline;photocatalysis
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NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 45
·期 5
·2631-2642
·
IF 3.288
Wei Hong,Chengcai Li,Tao Tang,Huan Xu,Yuan Yu,Guojin Liu,Feng Wang,Caihong Lei,Hailin Zhu
The immobilization of photocatalysts is considered an effective approach to solve the problem of the difficult recycling of powdered nanocatalysts after photocatalytic degradation. In this paper, tin dioxide/titanium dioxide (SnO2/TiO2) composite nanoparticles with excellent photodegradation performance and poly(vinylidene fluoride) (PVDF) resin were used as raw materials to prepare composite membranes for the catalytic degradation of rhodamine B (RhB) dye via a non-solvent-induced phase separation method. Specifically, the basic properties of SnO2/TiO2 composite nanoparticles were systematically analyzed, the photocatalytic performance of SnO2/TiO2/PVDF composite membranes was thoroughly investigated, and the photocatalytic mechanism has been revealed. Experimental results showed that the SnO2/TiO2 composite photocatalyst demonstrates a higher photocatalytic activity than the single photocatalyst with the SnO2/TiO2 composite comprising Sn/Ti in a molar ratio of 1 : 6, showing the highest photocatalytic performance. After SnO2/TiO2 composite particles were used as a kind of raw material for the production of PVDF membrane, the photocatalytic degradation rate of RhB by the SnO2/TiO2/PVDF composite membrane was as high as 91.84%. Moreover, ˙OH and h+ play a very important role in the whole photocatalytic degradation process. In summary, this paper will provide an effective guidance to improve the photocatalytic degradation of SnO2/TiO2/PVDF composite membranes, which will ultimately provide a broad potential application of photocatalysis in the field of water treatment.
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高影响因子
LUMINESCENCE
·
2019
·Vol. 34
·期 2
·193-199
·
IF 1.691
Nan Liu,Juan Hao,Lili Chen,Yonghai Song,Li Wang
Zeolitic imidazolate framework-8 (ZIF-8) loading rhodamine-B (ZIF-8@rhodamine-B) nanocomposites was proposed and used as ratiometric fluorescent sensor to detect copper(II) ion (Cu 2+ ). Scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray powder diffraction, nitrogen adsorption/desorption isotherms and fluorescence emission spectroscopy were employed to characterize the ZIF-8@rhodamine-B nanocomposites. The results showed the rhodamine-B was successfully assembled on ZIF-8 based on the π-π interaction and the hydrogen bond between the nitrogen atom of ZIF-8 and –COOH of rhodamine-B. The as-obtained ZIF-8@rhodamine-B nanocomposites were octahedron with size about 150–200 nm, had good water dispersion, and exhibited the characteristic fluorescence emission of ZIF-8 at 335 nm and rhodamine-B at 575 nm. The Cu 2+ could quench fluorescence of ZIF-8 rather than rhodamine-B. The ZIF-8 not only acted as the template to assemble rhodamine-B, but also was employed as the signal fluorescence together with the fluorescence of rhodamine-B as the reference to construct a novel ratiometric fluorescent sensor to detect Cu 2+ . The resulted ZIF-8@rhodamine-B nanocomposite fluorescence probe showed good linear range (68.4 nM to 125 μM) with a low detection limit (22.8 nM) for Cu 2+ combined with good sensitivity and selectivity. The work also provides a better way to design ratiometric fluorescent sensors from ZIF-8 and other fluorescent molecules.
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高影响因子
Materials Research Express
·
2021
·Vol. 8
·期 4
·045701
·
IF 1.62
Yongde Meng
The use of organic dyes has led to serious environmental problems resulting from contaminated wastewater; hence, the development of new dye-removal methods is an important objective. Herein, silvered nickel foam (nickel foam loaded with silver nanoparticles) is reported to significantly degrade an organic dye in aqueous solution. 20 mg · l–1 rhodamine B is completely reduced within 20 min with a rate constant of 0.26 min−1 in the presence of nickel foam sparsely loaded with silver. A mechanism for the reduction of rhodamine B is proposed. Moreover, the silvered nickel foam can be recycled at least five times. This research demonstrates that silvered nickel foam is a promising pollution-control candidate material.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Kewang Zheng,Keke He,Yuyang Du,Changchun Li,Lihang Shen,Yaoyao Zhang,Wei Li,Wei Wang,Caiqin Qin
To achieve the full utilization of excess Enteromorpha resources and the effective oxidation of organic contaminants from water, the FeCu composite nanoparticles encapsulated by N-doped graphene layers were produced via the thermal treatment of Enteromorpha -supported urea and metal ions, and used the materials to activate peroxymonosulfate (PMS) for RhB (Rhodamine B) oxidation. An appropriate iron-to-copper ratio is instrumental in enhancing the activation efficacy of the catalyst. The degradation percentage of 20 mg L −1 RhB was almost 100 %, utilizing the ECN@Fe 2 Cu of 0.1 g L −1 . Furthermore, ECN@Fe 2 Cu exhibits excellent anti-interference properties, reusability, and robust stability throughout the catalytic process. The radical quenching experiment, EPR, and electrochemical tests demonstrate that the main reactive oxygen in ECN@Fe 2 Cu/PMS/RhB system is 1 O 2 . XPS indicated that Fe 0 , Fe 3 C, Cu 0 , pyridinic N, and graphitic N doped in the carbon layer are the potential active sites. This work demonstrates that a high catalytic activity PMS activator can be produced by doping Fe/Cu/N with Enteromorpha .
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2025
·
IF 6.3
Jun-Feng Lu,Huan Wang,Yi Zhou,Xue-Ying Mao,Xiao-Qian Feng,Shuang Wang,Yong-Hua Zhao
Background Rhodamine B (RhB) poses a significant threat to aquatic ecosystems. While Fenton oxidation process is promising approach for RhB degradation, the conventional Fenton reaction has the narrow pH range and poor reusability. To overcome these, this study developed Fenton-like system with Fe-Cu/HZSM-5 catalyst for effective RhB degradation. Methods A series of Fe x Cu 5-x /HZSM-5 catalysts (x represents the molar ratio of Fe to Cu) were prepared by impregnation. These catalysts were integrated with H 2 O 2 to construct Fenton-like system for the degradation of RhB. The catalysts were characterized by XRD, NH 3 -TPD, XPS, FT-IR, and N 2 adsorption-desorption at low temperature techniques. Significant findings Among the tested catalysts, Fe 3 Cu 2 /HZSM-5 exhibited optimal performance, achieving near-complete RhB degradation (∼100%) under the condition of 45 °C, 5.3 mM/L H 2 O 2 , 3.0 g/L catalyst dosage, and broad pH range (2–5). Mechanistic studies confirmed that hydroxyl radicals (·OH) were the primary oxidants responsible for RhB degradation in Fenton-like system. Under ·OH attacking, RhB underwent a series of reactions such as N-deethylation and disruption of the conjugated structure and was eventually mineralized into CO 2 and H 2 O. Overall, a novel Fe-Cu/HZSM-5 catalyst was developed to address the limitations of the traditional Fenton reaction, providing valuable insights for future research in this field.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2014
·
IF 1.552
Ming Ge
A visible-light-driven Ag 3 PO 4 catalyst was successfully synthesized by a facile ion-exchange route. The as-synthesized Ag 3 PO 4 was characterized by X-Ray diffraction (XRD), field-emission scanning electron microscopy, N 2 adsorption-desorption, UV-Vis diffuse reflectance spectroscopy and Fourier transform infrared spectroscopy . Under visible light irradiation , the Ag 3 PO 4 catalyst showed excellent photocatalytic activity for rhodamine (RhB) degradation, but was poor at degrading methyl orange (MO) because of lower adsorption of MO molecules onto the surface of the Ag 3 PO 4 . The photodegradation of RhB and MO was achieved by holes and O 2 •− radical attack in the Ag 3 PO 4 suspension. The photodegradation of MO over the Ag 3 PO 4 catalyst was greatly enhanced in the presence of RhB owing to greater production of O 2 •− radicals.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2013
·Vol. 48
·期 24
·8386-8392
·
IF 2.163
Du Pingfan,Song Lixin,Xiong Jie,Cao Houbao
TiO 2 and ZnO nanofibers were fabricated through a facile electrospinning method. The obtained nanofibers were characterized by a variety of analytical means including FESEM, TEM, SAED, XRD, UV–Vis, and PL. Compared with nanoparticles, nanofibers can be recycled more easily when they are used as photocatalysts. The photocatalytic activities of these two nanofibers were investigated and compared by evaluating the photodegradation of hazardous dye Rhodamine B. Although, ZnO nanofibrous photocatalyst exhibits better initial activity than TiO 2 nanofibrous counterpart, its photocatalytic performance is inferior to that of the latter on the whole. The photo-instability arising from photocorrosion may be responsible for its rapid deterioration in activity. The difference in the photocatalytic properties between TiO 2 and ZnO nanofibers was discussed, and a possible photodegradation mechanism of organic dyes in the presence of the nanofibrous photocatalyst was proposed. This work offers a direct insight into the comparison of photocatalysis of electrospun TiO 2 and ZnO nanofibers.
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yuxiang Shi,Lei Li,Wei-Xian Zhang
This study aims to develop a mechanochemical reactor (MCR) integrated with persulfate-based advanced oxidation processes (SR-AOPs) to overcome zerovalent iron (ZVI) passivation for efficient degradation of high-concentration Rhodamine B (RhB) in textile wastewater. By employing high shear and mechanical collisions, the MCR continuously refreshes ZVI surfaces, enhancing Fe2+ release and persulfate activation. The MCR achieves 96.3% RhB degradation (500 mg·L–1), 68.3% COD reduction, and 74% TOC removal in 60 min, significantly outperforming the traditional stirred reactor (TSR: 22.7%, 17.8%, 9%). SO4·– and ·OH radicals drive Csp3–N/Csp2–N bond cleavage and aromatic ring hydroxylation, ensuring rapid decolorization and mineralization. The MCR maintains high performance across pH 3–11, RhB concentrations of 50–1000 mg·L–1, and anionic interferences, with degradation rates of 66.5%–99.0%. Simulated wastewater tests and economic-environmental assessments confirm its scalability and sustainability, establishing the MCR as a transformative solution for high-load dye wastewater treatment.
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高影响因子
WATER AIR AND SOIL POLLUTION
·
2025
·Vol. 237
·期 1
·9
·
IF 3
Liu Yiqing,Hu Hong,Chen Chuanzeng,Xu Linghan
Generally, Fe(II) has an efficiently catalytic activity toward peroxymonosulfate (PMS), but the slow conversion of Fe(III) to Fe(II) and production of iron sludge impede the practical application of Fe(II)/PMS system. In this work, ascorbic acid (AA), a complexing agent and reductant, was introduced to Fe(III)/PMS process to facilitate the Fe(III) reduction. The decoloration of rhodamine B (RhB) was obviously enhanced in Fe(III)/PMS process with the addition of AA. Fe(III)-AA complex was firstly generated in Fe(III)/AA/PMS process via the complexation and then was reduced to Fe(II), which could catalyze PMS to yield oxidative species. Fe(IV), sulfate radical (SO 4 •− ) and hydroxyl radical ( • OH) were the working oxidants for RhB decoloration in this system, and SO 4 •− played a major role. Increasing Fe(III), AA or PMS dosage was beneficial to RhB decoloration, but their excessive concentration would hinder RhB decoloration. The existence of HCO 3 − , SO 4 2− or FA in this system showed an inhibition effect on RhB decoloration, while a facilitation effect was obtained when the high concentration of Cl − was present. This research offers a way to improve PMS activation by Fe(III) and a technology for eliminating the refractory organic pollutants from the contaminated water.
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