MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2019
·
IF 2.722
Guo-quan Ma,Fu-sheng Liu,Sheng Wang,Zeng-chao Dang,Jia-wei Zhang,Xiao-jie Fu,Mei-shun Hou
A serial of Bi 2 S 3 /3DOM-TiO 2 (x-BS/3D-Ti, x denotes as the weight percentage of Bi 2 S 3 , x = 5, 10, 15, 20 and 25 wt%) were fabricated and their physico-chemical properties were characterized with the utilization of XRD , SEM, UV–Vis DRS and XPS . The photocatalytic performance was investigated based on photocatalytic degradation of rhodamine B (RhB) solution under simulated solar irradiation . The mechanisms for enhancing the photocatalytic activity and the degradation of RhB occurring on the BS/3D-Ti surface were discussed. The results indicated that 20-BS/3D-Ti exhibited the highest photocatalytic performance among the prepared samples. Although good adsorption property of BS/3D-Ti for RhB could promote the degradation of RhB, effective separation between photoinduced electron and hole was the key influencing factor compared to adsorption. The slightly reducing in the photocatalytic degradation rates after multiple cycles was caused by the adsorption of the oxidation intermediate product of RhB on the surface of BS/3D-Ti, which decreases the absorption of light.
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高影响因子
ACS Applied Materials & Interfaces
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2023
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IF 9.5
Hongyu Wang,Na Qiu,Xiangfei Kong,Zhenguang Hu,Fuxin Zhong,Yongsheng Li,Haijun Tan
A new porous organic polymer (CTF-CAR), which takes carbazole as the electron-rich center unit and thiophenes as the auxiliary group, has been synthesized through catalyst-free Schiff-base polymerization. At the same time, the structure, thermal stability, morphology, and other basic properties of the polymer were analyzed by IR, NMR, TGA, and SEM. Then, CTF-CAR was applied to iodine capture and rhodamine B adsorption. Due to its strong electron donor ability and abundant heteroatom binding sites, which have a positive effect on the interaction between the polymer network and adsorbates, CTF-CAR exhibits high uptake capacities for iodine vapor and rhodamine B as 2.86 g g–1 and 199.7 mg g–1, respectively. The recyclability test also confirmed that it has good reusability. We found that this low-cost and catalyst-free synthetic porous organic polymer has great potential for the treatment of polluted water and iodine capture.
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2023
·
IF 6.7
Fanghui Cai,Chunyu Sun,Zhenzhen Sun,Yong Lai,Hanming Ding
Spinel-type bimetallic oxides have several potential applications in the catalytic degradation of organic wastewater due to their high catalytic activity and slow ion release rate caused by bimetallic synergy. In this study, sulfur-functionalized CoMn 2 O 4 (S-CoMn 2 O 4 ) was prepared as a Fenton-like catalyst by the sol–gel process, followed by calcination and sulfurization. The catalytic activity of CoMn 2 O 4 was significantly increased by the incorporation of sulfur. The S-CoMn 2 O 4 (5.00%) catalyst modified with 5.00% sulfur in atomic percentage exhibited the best catalytic performance. Typically, 30 mg/L of rhodamine B was removed in 18 min by using 0.20 g/L S-CoMn 2 O 4 (5.00%) and 0.16 g/L peroxymonosulfate. Singlet oxygen and sulfate radicals are the primary active species, according to the trapping agent experiments and EPR measurements. The incorporation of sulfur leads to the formation of abundant oxygen vacancies in CoMn 2 O 4 and sulfate groups bound on the surface of CoMn 2 O 4 , which promotes producing more active species. A synergism of Co and Mn ions in CoMn 2 O 4 and high electron transfer mobility are also responsible for the enhanced degradation performance of S-CoMn 2 O 4 (5.00%). This study provides a feasible solution for improving cobalt manganese oxide as a more effective and long-lasting Fenton-like catalyst for the degradation of organic contaminants.
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高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Xu Ren,Peixin Tang,Bo Hou,Zhuyi Yu,Jin Huang,Qingyuan Wang,Kai Song
This study investigated the efficiency of a sequential batch three-dimensional electrode reactor (3DER) using stainless steel electrodes and Mn-loaded steel slag as the particle electrodes (PE) to degrade refractory organics. The PE, a micron-grade material consisting primarily of SiO 2 , Fe 2 O 3 , and MnO 2 , exhibits excellent electric conductivity and catalysis ability. Then, a single-factor experiment determined the optimal conditions for removing 20 mg·L −1 of RhB in the 3DER. It involved introducing 5 mM H 2 O 2 and 1.0 g·L −1 PE to 200 mL of simulated wastewater under acidic-to-neutral conditions, under a current density of 57.14 mA·cm −2 and 15 mm distance between 2D electrodes. Approximately 99.52% RhB removal after 15 min of reaction was achieved. Although the inorganic ions in actual water negatively affect the 3DER performance, the system still showed excellent applicability in treating wastewater. In addition, the RhB degradation pathway was explored by determining the reactive oxidizing species (ROS) and intermediate products. The results illustrated that HO• (the main ROS that degraded organics) and SO 4 •− existed in the 3DER. Through de-ethylation, ring-opening, and C-C or C C bone rupturing, RhB degraded to chain organics with simple molecular structures before finally mineralizing to CO 2 , H 2 O, NO 3 - , and NH 4 + . In summary, this research informs on the potential of 3DER for removing refractory organics from water.
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高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2022
·Vol. 104
·期 2
·380-386
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IF 2.606
Yang Xiaobing,Pan Junjie,Fang Ming,Su Taichao,Cheng Kejun
Photocatalysis, as one of the most advanced oxidation techniques, has been paid more and more attention due to its advantages in solving environmental pollution problems, such as low cost, eco-friendly, efficiently and no secondary pollution. In this paper, we fabricated a series of Ce doped CoIn 2 S 4 photocatalyst with different Ce content via solvothermal reaction and explored the influence of Ce on the photocatalytic activity of CoIn 2 S 4 . The properties of all samples were characterized by X-ray diffractometer (XRD), scanning electron microscope (SEM), ultraviolet spectrophotometer (UV–vis), transmission electron microscope (TEM) and so on. The results show that the doping of Ce can highly improve the photocatalytic activity of CoIn 2 S 4 . When CoIn 2 S 4 is doped with 0.1 g of Ce(NO 3 ) 3 ·6H 2 O, it exhibits the highest photocatalytic activity and can degrade 98.55% of rhodamine B (RhB). This strategy of doping rare earth element on semiconductor provides a facile and promising way to the remediation of environmental pollution.
Graphical abstract
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高影响因子
Catalysts
·
2022
·Vol. 12
·期 6
·669
·
IF 4.501
Peiguo Zhou,Zongbiao Dai,Tianyu Lu,Xin Ru,Meshack Appiah Ofori,Wenjing Yang,Jiaxin Hou,Hui Jin
The water pollution caused by industry emissions makes effluent treatment a serious matter that needs to be settled. Heterogeneous Fenton oxidation has been recognized as an effective means to degrade pollutants in water. Attapulgite can be used as a catalyst carrier because of its distinctive spatial crystal structure and surface ion exchange. In this study, iron ions were transported on attapulgite particles to generate an iron-supporting attapulgite particles catalyst. BET, EDS, SEM and XRD characterized the catalysts. The particle was used as a heterogeneous catalyst to degrade rhodamine B (RhB) dye in wastewater. The effects of H2O2concentration, initial pH value, catalyst dosage and temperature on the degradation of dyes were studied. The results showed that the decolorization efficiency was consistently maintained after consecutive use of a granular catalyst five times, and the removal rate was more than 98%. The degradation and mineralization effect of cationic dyes by granular catalyst was better than that of anionic dyes. Hydroxyl radicals play a dominant role in RhB catalytic degradation. The dynamic change and mechanism of granular catalysts in catalytic degradation of RhB were analyzed. In this study, the application range of attapulgite was widened. The prepared granular catalyst was cheap, stable and efficient, and could be used to treat refractory organic wastewater.Keywords:iron-bearing attapulgite;heterogeneous Fenton;granular catalyst;rhodamine B
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高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Si Wu,Huicong Liang,Zhe Zhang,Qi Zhang,Qiang Han,Jingshu Wang,Ming Gao,Hougang Fan,Jinghai Yang,Jihui Lang
Zn–Al layered double hydroxides (Zn–Al LDHs) with a typical layered structure were successfully synthesized by the hydrothermal method . The effects of molar ratios of Zn and Al on the structure, morphology, chemical composition and photocatalytic performance of Zn–Al LDHs were systematically investigated. By adjusting the Zn/Al molar ratio, it can be found that the Zn–Al-LDH-3 sheet with the ratio of 3 exhibits the best photocatalytic activity and reusability, which is mainly ascribed to the formation of more photo-generated holes in the photocatalytic process proved by the free radical quenching experiment. The optimized conditions of catalyst dosages, rhodamine B (RhB) concentrations and initial pH values to achieve the highest were also investigated in detail. This work provides a simple method for designing environmental friendly layered double hydroxide photocatalysts with special morphologies.
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高影响因子
ADVANCED POWDER TECHNOLOGY
·
2022
·
IF 4.969
Yan Wang,Kangkang Miao,Weixing Zhao,Hongbo Jiang,Liangliang Liu,Dengwei Hu,Bin Cui,Yaping Li,Yue Sun
In this study, nanoparticle-assembled Bi 25 FeO 40 materials were synthesized by a novel and simple process, and their microstructure was regulated by different methods of adding Bi 3+ and Fe 3+ . The novel nanoparticle-assembled tetrakaidekahedron Bi 25 FeO 40 materials exhibited more oxygen vacancy and larger specific surface area than irregular or cubic-like Bi 25 FeO 40 microcrystals and revealed better photo-Fenton catalytic oxidation activity toward degrading Rhodamine B (RhB) pollutants. These novel materials activated H 2 O 2 in visible light to produce non-free radicals 1 O 2 and hole (h + ) active oxidative species that dominated the catalytic degradation of RhB. Complete degradation of RhB was achieved after 1 h. The possible reaction mechanisms of the photo-Fenton catalytic system are discussed in detail by radical scavenging tests, X-ray phosphorescence analysis, and electron paramagnetic resonance spectroscopy . The results provided a way to rationally explore and construct photo-Fenton catalysts for wastewater treatment .
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 32
·15250-15260
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IF 3.3
Xiaofeng You,Lin Han,Qing Liu
Hyper-cross-linked resins have tremendous prospects for the removal of organic dyes from aqueous solutions due to their adjustable porosity, tunable polarity and diversified functionality, whereas the extreme hydrophobicity of the skeleton limits their application. Hence, it is essential for introducing polar functional groups in the construction of a highly polar hyper-cross-linked resin. In this work, we synthesized polar-modified hyper-cross-linked resins (HVPN-x) by introducing 3-aminobenzoic acid (3-AC) containing amino and carboxyl groups via a stepwise combination. The analysis results indicated that hydrophilicity significantly enhanced with the increase of the percentage of 3-AC. The water diffusion time of HVPN-6 can be found to be quite fast and the complete diffusion of water droplets occurs within 0.28 s. The adsorption experiment results demonstrate that HVPN-6 exhibited a significant increase in RhB adsorption capacity, equivalent to 2.6 times that of pristine HVPN-0. This is probably because the uploaded amino and carboxyl groups are conducive to equilibrium adsorption due to polar matching, and hydrogen bonding is possibly formed between the resin and Rhodamine B. Above all, the polar hyper-cross-linked resin modified with the 3-AC monomer may be a potential candidate for Rhodamine B adsorption from aqueous solution owing to its excellent polarity.
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高影响因子
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2023
·Vol. 70
·期 9
·1784-1795
·
IF 1.8
Hong-jian Zhao,Yan Zhou,Ren-Jang Wu,Zhe Yu,Zhi-qiang Wu,Xu Li,Zheng-bing Han
Objective A highly active and stable composite photocatalyst which can be used in practical environmental remediation was developed. Methods g-C 3 N 4 /SnO 2 /BiPO 4 ternary composites (CN/SO/BPO) were synthesised via simple impregnation, and their texture structure, morphology, and surface composition were deeply characterized. Results In just 25 min under visible-light radiation, CN/SO/BPO almost eliminated rhodamine B, and the observed rate constant for the reaction was almost 36 and 3 times higher in comparison to that of CN/BPO and SO/BPO, respectively. Conclusions On the basis of experimental outcomes and DFT calculation, the direct Z-type structure of CN/SO/BPO lead to the improved photogenerated charge separation efficiency, as confirmed by surface photovoltage spectroscopy, electrochemical impedance spectroscopy, and transient photocurrent responses.
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高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Dedi Liu,Dapeng Dong,Zhenyi Zhang,Yangyang He,Zhenghua Li,Jinhai Niu,Naisen Yu,Hongsheng Jia
Encapsulating organic dyes within porous solids is an efficient way to design luminescent composite materials and devices. However, for practice applications, the luminescence tuning and the stability investigation of such materials is still a challenge work. Here, a comparative in situ Raman spectra and photoluminescence (PL) spectra are employed to study the structural and optical property of both pure Rhodamine B (RHB) and samples absorbed on a kind of typical materials of institute lavoisier frameworks (MIL) under high pressure, respectively. The luminescence of RHB@MIL 53(Fe) can persist to pressures much higher than that for pure RHB. Our studies revealed that the PL emissions of RHB origin from monomeric and dimeric structures, respectively. Furthermore, our results indicated that the confining effect of MIL 53(Fe) pores inhibited the dimerization of RHB molecules under high pressure.
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高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Li Ye,Jiacheng Li,Xiaolei Li,Pengcheng Zhu,Tianxing Wang,Yao Zhong,Dingyu Song,Lin Zhuang
Tremendous efforts have been dedicated to developing waste dye treatment methods that are recyclable and efficient. However, challenges such as high toxicity, poor dispersion in aqueous solutions, and the high residual rate problems of some catalysts persist. Herein, inspired by the superparamagnetic properties and the electrostatic absorption capacity of Fe3O4 and the photocatalytic activity of NiO, flower-like, adsorptive-photocatalytic dual-effect dye scavengers, named Fe3O4@SiO2@NiO magnetic nanoparticles (FSN MNPs), are fabricated. The outermost NiO layer with a large specific surface area of 211.876 m2/g effectively adsorbs dyes via electrostatic interactions. More importantly, the introduction of an inert protective SiO2 layer between the Fe3O4 core and NiO shell enhances the chemical stability and catalytic performance of the FSN MNPs. These FSN MNPs are recyclable and can be reused at least six times. Their photocatalytic activity against rhodamine B (RhB) was assessed. They show a high RhB degradation efficiency of up to 99.50%. Therefore, the FSN MNPs are promising catalysts for dye degradation in industrial wastewater treatment applications.
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