1
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Thoumrungroj A, Wongtongprapun S, Tuntithavornwat S, Saisawang C, Sangkhanak S, Wongyongnoi P, Serivalsatit K, Hunsom M. Photocatalytic Gold Recovery from Industrial Gold Plating Effluent by ZnO Nanoparticles: Optimum Condition and Possible Applications. ACS OMEGA 2023; 8:45096-45108. [PMID: 38046310 PMCID: PMC10688215 DOI: 10.1021/acsomega.3c07336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 10/20/2023] [Accepted: 10/26/2023] [Indexed: 12/05/2023]
Abstract
The comparative study of photocatalytic gold recovery from cyanide-based gold plating solution was explored via commercial and hydrothermally synthesized ZnO nanoparticles (NPs). The effects of hydrothermal temperatures on the properties and photocatalytic activities of synthesized ZnO NPs were investigated. In addition, the effects of operating parameters including types of hole scavenger, concentrations of the best hole scavenger, the initial pH of wastewater, and photocatalyst dosages were examined. The obtained results demonstrated that the commercial ZnO NPs exhibited a higher photocatalytic activity for gold recovery than that of the synthesized ones owing to their good crystal quality and the presence of non-lattice zinc ions and appropriate non-lattice oxygen ions. Via the commercial ZnO NPs, the gold ions were almost completely recovered from the cyanide-based gold plating effluent within 7 h at an initial pH of 11.0 in the presence of 10 vol % C2H5OH and 1.0 g/L of photocatalyst loading with a pseudo-first-order rate constant of 0.2637 h-1. Finally, the resultant gold-decorated ZnO NPs exhibited a higher photocatalytic property for color reduction from industrial wastewater and antibacterial activity than that of fresh ZnO NPs. The results obtained in this study possess benefits and pave the way for waste remediation and management for the plating industries.
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Affiliation(s)
- Auttawit Thoumrungroj
- Department
of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom 73170, Thailand
| | - Suchalee Wongtongprapun
- Department
of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom 73170, Thailand
| | - Soontorn Tuntithavornwat
- Department
of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom 73170, Thailand
- Advanced
Microfabrication and Biomaterial for Organ-on-chip Research Unit (AMBiO),
Faculty of Engineering, Mahidol University, Nakhon Pathom 73170, Thailand
| | - Chonticha Saisawang
- Institute
of Molecular Biosciences, Mahidol University, Nakhon Pathom 73170, Thailand
| | - Satjaporn Sangkhanak
- Department
of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Panuwat Wongyongnoi
- Department
of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Karn Serivalsatit
- Department
of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Mali Hunsom
- Department
of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom 73170, Thailand
- Royal
Society
of Thailand (AFRST), Bangkok 10300, Thailand
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2
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Boukoufi C, Boudier A, Clarot I. Increased Range of Catalytic Activities of Immobilized Compared to Colloidal Gold Nanoparticles. Molecules 2023; 28:7558. [PMID: 38005280 PMCID: PMC10673133 DOI: 10.3390/molecules28227558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/06/2023] [Accepted: 11/09/2023] [Indexed: 11/26/2023] Open
Abstract
Gold nanoparticles (AuNPs) can be described as nanozymes, species that are able to mimic the catalytic activities of several enzymes, such as oxidase/peroxidase, reductase, or catalase. Most studies in the literature focus on the colloidal suspension of AuNPs, and it is obvious that their immobilization could open the doors to new applications thanks to their increased stability in this state. This work aimed to investigate the behavior of surfaces covered by immobilized AuNPs (iAuNPs). Citrate-stabilized AuNPs (AuNPs-cit) were synthesized and immobilized on glass slides using a simple dip coating method. The resulting iAuNPs were characterized (surface plasmon resonance, microscopy, quantification of immobilized AuNPs), and their multi-enzymatic-like activities (oxidase-, peroxidase-, and catalase-like activity) were evaluated. The comparison of their activities versus AuNPs-cit highlighted their added value, especially the preservation of their activity in some reaction media, and their ease of reuse. The huge potential of iAuNPs for heterogeneous catalysis was then applied to the degradation of two model molecules of hospital pollutants: metronidazole and methylene blue.
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Affiliation(s)
- Célia Boukoufi
- Université de Lorraine, CITHEFOR, F-54000 Nancy, France
- Pharmacy Department, University Hospital, F-54511 Vandoeuvre-Lès-Nancy, France
| | - Ariane Boudier
- Université de Lorraine, CITHEFOR, F-54000 Nancy, France
- Institut Universitaire de France (IUF), F-75231 Paris, France
| | - Igor Clarot
- Université de Lorraine, CITHEFOR, F-54000 Nancy, France
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3
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Yang W, Xu C, Lyu Y, Lan Z, Li J, Ng DHL. Hierarchical hollow α-Fe 2O 3/ZnFe 2O 4/Mn 2O 3 Janus micromotors as dynamic and efficient microcleaners for enhanced photo-Fenton elimination of organic pollutants. CHEMOSPHERE 2023; 338:139530. [PMID: 37459924 DOI: 10.1016/j.chemosphere.2023.139530] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 06/16/2023] [Accepted: 07/14/2023] [Indexed: 07/21/2023]
Abstract
Micro/nanomotors that can promote mass transport have attracted more and more research concern in the photocatalysis field. Here we first report a newly-designed hierarchical α-Fe2O3/ZnFe2O4/Mn2O3 magnetic micromotor as a heterogeneous photocatalyst for the degradation of cationic dye methylene blue (MB) from wastewater. The resulting three-dimensional (3D) flower-like hollow Janus micromotors are fabricated through a green and scalable strategy, in which each component has different functions. ZnFe2O4 microspheres serve as a magnetic scaffold for the nucleation and growth of α-Fe2O3 nanosheets and for the recycling of the micromachine. α-Fe2O3 nanosheets have shown great potential as an ideal semiconductor material for the photocatalytic decontamination of pollutants. Mn2O3 nanoparticles are mainly utilized as a catalyst to produce O2 bubbles to propel the autonomic movement of the micromotors in the presence of H2O2 fuel and also as a Fenton-like catalyst to decompose H2O2 to generate reactive oxygen species. Furthermore, the resultant micromotors exhibited linear-like motion form with an average speed of 189.1 μm s-1 in 5 wt% H2O2 solution. Moreover, the self-driven micromotors exhibited a superior catalytic degradation property toward MB, which was attributed to the synergistic effect of heterogeneous photocatalyst and the boosted micro-mixing and mass transfer caused by the vigorous motion of the micro-actuator. The possible degradation intermediates and passways of MB by α-Fe2O3/ZnFe2O4/Mn2O3 micromotor were identified with time of flight mass spectroscopy (TOF-MS). The 3D Janus micromotors have the potential to be used as a high-efficiency and active heterogeneous photocatalyst for the degradation of organic pollutants.
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Affiliation(s)
- Wenning Yang
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, PR China; School of Material Science and Engineering, University of Jinan, Jinan, PR China
| | - Chaochao Xu
- School of Material Science and Engineering, University of Jinan, Jinan, PR China
| | - Yangsai Lyu
- Department of Mathematics and Statistics, Queen's University, Kingston, K7L 3N6, Canada
| | - Ziwei Lan
- School of Material Science and Engineering, University of Jinan, Jinan, PR China
| | - Jia Li
- School of Material Science and Engineering, University of Jinan, Jinan, PR China.
| | - Dickon H L Ng
- School of Science and Engineering, The Chinese University of Hong Kong (Shenzhen), Shenzhen, PR China
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4
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Shi G, Zeng S, Liu Y, Xiang J, Deng D, Wu C, Teng Q, Yang H. Efficient heterogeneous Fenton-like degradation of methylene blue using green synthesized yeast supported iron nanoparticles. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 263:115240. [PMID: 37441945 DOI: 10.1016/j.ecoenv.2023.115240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 06/25/2023] [Accepted: 07/05/2023] [Indexed: 07/15/2023]
Abstract
To reduce the consumption of oxidant and catalyst in Fenton-like reaction and to realize the reuse of catalyst, yeast supported iron nanoparticles (nZVI@SCM) was synthesized by tobacco leaf extract and applied in the heterogeneous Fenton-like degradation of aqueous methylene blue (MB) at ambient conditions. The performance of the composite was exploited in terms of catalytic activity and factors influencing MB degradation. The surface changes of nZVI@SCM before and after reaction were characterized by XPS, SEM, FT-IR and XRD. Iron leaching, primary reactive oxidizing species, and the storage stability and reusability of catalyst were also investigated. Typically, 99.7% removal of 50 mg/L MB, with a TOC removal of 97.2%, could be achieved within 10 h by 0.1 g/L nZVI@SCM coupled with 1.0 mM H2O2. The MB degradation is in good agreement with the pseudo-first-order model, and hydroxyl radicals in the bulk solution is the main reactive oxidizing species responsible for MB degradation. Based on the identified intermediates by liquid chromatography/mass spectrometry, the possible MB degradation mechanism in the nZVI@SCM/H2O2 system is discussed. The developed high-performance nZVI@SCM catalyst strategy can provide a new route in enhancing the Fenton-like degradation of organic contaminants with less consumption of catalyst and oxidant.
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Affiliation(s)
- Guorong Shi
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China; College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
| | - Shuangqing Zeng
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Yefeng Liu
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Jun Xiang
- Hunan Wenpu Detection Technology Research Co., Ltd, Changsha 410001, China
| | - Dale Deng
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Chenmeng Wu
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Qian Teng
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Hua Yang
- School of Biological Science and Technology, Hunan Agricultural University, Changsha 410128, China.
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5
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Loke YL, Beishenaliev A, Wang PW, Lin CY, Chang CY, Foo YY, Faruqu FN, Leo BF, Misran M, Chung LY, Shieh DB, Kiew LV, Chang CC, Teo YY. ROS-generating alginate-coated gold nanorods as biocompatible nanosonosensitisers for effective sonodynamic therapy of cancer. ULTRASONICS SONOCHEMISTRY 2023; 96:106437. [PMID: 37187119 DOI: 10.1016/j.ultsonch.2023.106437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Revised: 05/05/2023] [Accepted: 05/06/2023] [Indexed: 05/17/2023]
Abstract
Sonodynamic therapy (SDT) emerges as a promising non-invasive alternative for eradicating malignant tumours. However, its therapeutic efficacy remains limited due to the lack of sonosensitisers with high potency and biosafety. Previously, gold nanorods (AuNRs) have been extensively studied for their applications in photodynamic or photothermal cancer therapy, but their sonosensitising properties are largely unexplored. Here, we reported the applicability of alginate-coated AuNRs (AuNRsALG) with improved biocompatibility profiles as promising nanosonosensitisers for SDT for the first time. AuNRsALG were found stable under ultrasound irradiation (1.0 W/cm2, 5 min) and maintained structural integrity for 3 cycles of irradiation. The exposure of the AuNRsALG to ultrasound irradiation (1.0 W/cm2, 5 min) was shown to enhance the cavitation effect significantly and generate a 3 to 8-fold higher amount of singlet oxygen (1O2) than other reported commercial titanium dioxide nanosonosensitisers. AuNRsALG exerted dose-dependent sonotoxicity on human MDA-MB-231 breast cancer cells in vitro, with ∼ 81% cancer cell killing efficacy at a sub-nanomolar level (IC50 was 0.68 nM) predominantly through apoptosis. The protein expression analysis showed significant DNA damage and downregulation of anti-apoptotic Bcl-2, suggesting AuNRsALG induced cell death through the mitochondrial pathway. The addition of mannitol, a reactive oxygen species (ROS) scavenger, inhibited cancer-killing effect of AuNRsALG-mediated SDT, further verifying that the sonotoxicity of AuNRsALG is driven by the production of ROS. Overall, these results highlight the potential application of AuNRsALG as an effective nanosonosensitising agent in clinical settings.
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Affiliation(s)
- Yean Leng Loke
- Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Adilet Beishenaliev
- Department of Pharmacology, Faculty of Medicine, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Pei-Wen Wang
- Institute of Oral Medicine and School of Dentistry, College of Medicine, National Cheng Kung University Hospital, National Cheng Kung University, 70101 Tainan, Taiwan; Center of Applied Nanomedicine, National Cheng Kung University, 70101 Tainan, Taiwan
| | - Chung-Yin Lin
- Institute for Radiological Research, Chang Gung University, 33303 Taoyuan, Taiwan; Department of Neurology, Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, 33303 Taoyuan, Taiwan
| | - Chia-Yu Chang
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, 30068 Hsinchu, Taiwan; Center for Intelligent Drug Systems and Smart Bio-devices (IDS(2)B), National Yang Ming Chiao Tung University, 30068 Hsinchu, Taiwan
| | - Yiing Yee Foo
- Department of Pharmacology, Faculty of Medicine, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Farid Nazer Faruqu
- Department of Pharmacology, Faculty of Medicine, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Bey Fen Leo
- Department of Molecular Medicine, Faculty of Medicine, Universiti Malaya, 50603 Kuala Lumpur, Malaysia; Nanotechnology & Catalysis Research Centre (NANOCAT), Institute for Advanced Studies, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Misni Misran
- Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Lip Yong Chung
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Dar-Bin Shieh
- Institute of Oral Medicine and School of Dentistry, College of Medicine, National Cheng Kung University Hospital, National Cheng Kung University, 70101 Tainan, Taiwan; Center of Applied Nanomedicine, National Cheng Kung University, 70101 Tainan, Taiwan; Department of Stomatology, National Cheng Kung University Hospital, 70403 Tainan, Taiwan
| | - Lik Voon Kiew
- Department of Pharmacology, Faculty of Medicine, Universiti Malaya, 50603 Kuala Lumpur, Malaysia; Department of Biological Science and Technology, National Yang Ming Chiao Tung University, 30068 Hsinchu, Taiwan.
| | - Chia-Ching Chang
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, 30068 Hsinchu, Taiwan; Center for Intelligent Drug Systems and Smart Bio-devices (IDS(2)B), National Yang Ming Chiao Tung University, 30068 Hsinchu, Taiwan; Department of Electrophysics, National Yang Ming Chiao Tung University, 30010 Hsinchu, Taiwan; Institute of Physics, Academia Sinica, Nankang, 11529 Taipei, Taiwan; Brain Research Center, National Tsing Hua University, 300044 Hsinchu, Taiwan, ROC.
| | - Yin Yin Teo
- Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia.
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6
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Mi Y, Zhang S, Zhao Y, Sun G, Cao Z. Pyrrolic N and Persistent Free Radical Synergistically Promote Catalytic Degradation of Dyes via Fe2O3/Activated Biochar Derived from Taihu Blue Algae. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
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7
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Dey AK, Mishra SR, Ahmaruzzaman M. Solar light-based advanced oxidation processes for degradation of methylene blue dye using novel Zn-modified CeO 2@biochar. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:53887-53903. [PMID: 36867337 DOI: 10.1007/s11356-023-26183-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 02/24/2023] [Indexed: 06/19/2023]
Abstract
Herein, a novel nanocomposite, namely, Zn-modified CeO2@biochar (Zn/CeO2@BC), is synthesized via facile one-step sol-precipitation to study its photocatalytic activity towards the removal of methylene blue dye. Firstly, Zn/Ce(OH)4@biochar was precipitated by adding sodium hydroxide to cerium salt precursor; then, the composite was calcined in a muffle furnace to convert Ce(OH)4 into CeO2. The crystallite structure, topographical and morphological properties, chemical compositions, and specific surface area of the synthesized nanocomposite are characterized by XRD, SEM, TEM, XPS, EDS, and BET analysis. The nearly spherical Zn/CeO2@BC nanocomposite has an average particle size of 27.05 nm and a specific surface area of 141.59 m2/g. All the tests showed the agglomeration of Zn nanoparticles over the CeO2@biochar matrix. The synthesized nanocomposite showed remarkable photocatalytic activity towards removing methylene blue, an organic dye commonly found in industrial effluents. The kinetics and mechanism of Fenton-activated dye degradation were studied. The nanocomposite exhibited the highest degradation efficiency of 98.24% under direct solar irradiation of 90 min, at an optimum dosage of 0.2 g l-1 catalyst and 10 ppm dye concentration, in the presence of 25% (V/V) 0.2 ml (4 µl/ml) hydrogen peroxide. The hydroxyl radical generated from H2O2 during the photo-Fenton reaction process was attributed to the nanocomposite's improved photodegradation performance. The degradation process followed pseudo-first-order kinetics having a rate constant (k) value of 0.0274 min-1.
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Affiliation(s)
- Akshay Kumar Dey
- Department of Chemistry, National Institute of Technology, Silchar, 788010, Assam, India
| | - Soumya Ranjan Mishra
- Department of Chemistry, National Institute of Technology, Silchar, 788010, Assam, India
| | - Md Ahmaruzzaman
- Department of Chemistry, National Institute of Technology, Silchar, 788010, Assam, India.
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8
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Wang K, Luo L, Wang C, Tang J. Photocatalytic methane activation by dual reaction sites co-modified WO3. CHINESE JOURNAL OF CATALYSIS 2023. [DOI: 10.1016/s1872-2067(22)64169-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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9
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Wang T, Yang XC, Ding Y, Zhang YJ, Ru YQ, Tan JJ, Xu F, Gao WW, Xia YM. Cuprous oxide-demethyleneberberine nanospheres for single near-infrared light-triggered photoresponsive-enhanced enzymatic synergistic antibacterial therapy. J Mater Chem B 2023; 11:1760-1772. [PMID: 36723366 DOI: 10.1039/d2tb02594a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
In this work, novel cuprous oxide-demethyleneberberine (Cu2O-DMB) nanomaterials are successfully synthesized for photoresponsive-enhanced enzymatic synergistic antibacterial therapy under near-infrared (NIR) irradiation (808 nm). Cu2O-DMB has a spherical morphology with a smaller nanosize and positive ζ potential, can trap bacteria through electrostatic interactions resulting in a targeting function. Cu2O-DMB nanospheres show both oxidase-like and peroxidase-like activities, and serve as a self-cascade platform, which can deplete high concentrations of GSH to produce O2˙- and H2O2, then H2O2 is transformed into ˙OH, without introducing exogenous H2O2. At the same time, Cu2O-DMB nanospheres become photoresponsive, producing 1O2 and having an efficient photothermal conversion effect upon NIR irradiation. The proposed mechanism is that the generated ROS (O2˙-, ˙OH and 1O2) and hyperthermia can have synergetic effects for killing bacteria. Moreover, hyperthermia is not only beneficial for destroying bacteria, but also effectively enhances the efficiency of ˙OH production and accelerates GSH oxidation. Upon NIR irradiation, Cu2O-DMB nanospheres exhibit excellent antibacterial ability against methicillin-resistant Staphylococcus aureus (MRSA) and ampicillin-resistant Escherichia coli (AREC) with low cytotoxicity and bare bacterial resistance, destroy the bacterial membrane causing an efflux of proteins and disrupt the bacterial biofilm formation. Animal experiments show that the Cu2O-DMB + NIR group can efficiently treat MRSA infection and promote wound healing. These results suggest that Cu2O-DMB nanospheres are effective materials for combating bacterial infections highly efficiently and to aid the development of photoresponsive enzymatic synergistic antibacterial therapy.
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Affiliation(s)
- Tao Wang
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Xiao-Chan Yang
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Yong Ding
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Yu-Jiao Zhang
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Yu-Qing Ru
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Jia-Jun Tan
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Fang Xu
- Key laboratory of Processing and Quality Evaluation Technology of Green Plastics of China National Light Industry Council, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Wei-Wei Gao
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Ya-Mu Xia
- State Key Laboratory Base of Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
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10
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Tada H, Naya SI, Sugime H. Near Infrared Light-to-Heat Conversion for Liquid-Phase Oxidation Reactions by Antimony-Doped Tin Oxide Nanocrystals. Chemphyschem 2022; 24:e202200696. [PMID: 36535899 DOI: 10.1002/cphc.202200696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 12/16/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022]
Abstract
Effective utilization of the sunlight for chemical reactions is pivotal for dealing with the growing energy and environmental issues. So far, much effort has been focused on the development of semiconductor photocatalysts responsive to UV and visible light. However, the near infrared and infrared (NIR-IR) light occupying ∼50 % of the solar energy has usually been wasted because of the low photon energy insufficient for the band gap excitation. Antimony doping into SnO2 (ATO) induces strong absorption due to the conduction band electrons in the NIR region. The absorbed light energy is eventually converted to heat via the interaction between hot electrons and phonons. This Concept highlights the photothermal effect of ATO nanocrystals (NCs) on liquid-phase oxidation reactions through the NIR light-to-heat conversion. Under NIR illumination even at an intensity of ∼0.5 sun, the reaction field temperature on the catalyst surface is raised 20-30 K above the bulk solution temperature, while the latter is maintained near the ambient temperature. In some reactions, this photothermal local heating engenders the enhancement of not only the catalytic activity and selectivity but also the regeneration of catalytically active sites. Further, the photocatalytic activity of semiconductors can be promoted. Finally, the conclusions and possible subjects in the future are summarized.
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Affiliation(s)
- Hiroaki Tada
- Department of Applied Chemistry Faculty of Science and Engineering, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka, 577-8502, Japan.,Graduate School of Science and Engineering, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka, 577-8502, Japan
| | - Shin-Ichi Naya
- Environmental Research Laboratory, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka, 577-8502, Japan
| | - Hisashi Sugime
- Department of Applied Chemistry Faculty of Science and Engineering, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka, 577-8502, Japan
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11
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New Approach for Designing Wrinkled and Porous ZnO Thin Films for Photocatalytic Applications. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Desseigne M, Madigou V, Coulet MV, Heintz O, Chevallier V, Arab M. Au/WO3 nanocomposite based photocatalyst for enhanced solar photocatalytic activity. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Wolski L, Sobańska K, Nowaczyk G, Frankowski M, Pietrowski M, Jarek M, Rozmyślak M, Pietrzyk P. Phosphate doping as a promising approach to improve reactivity of Nb 2O 5 in catalytic activation of hydrogen peroxide and removal of methylene blue via adsorption and oxidative degradation. JOURNAL OF HAZARDOUS MATERIALS 2022; 440:129783. [PMID: 36027741 DOI: 10.1016/j.jhazmat.2022.129783] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 07/28/2022] [Accepted: 08/13/2022] [Indexed: 06/15/2023]
Abstract
This study is devoted to the evaluation of the influence of phosphate dopants on the reactivity of Nb2O5-based nanomaterials in the combined catalytic activation of H2O2 and the elimination of methylene blue (MB) from an aqueous solution via adsorption and chemical degradation. For this purpose, several niobia-based catalysts doped with various amounts of phosphate were prepared by a facile hydrothermal method and subsequent calcination. Phosphate doping was shown to strongly enhance the ability of Nb2O5 to activate H2O2, as well as to adsorb and degrade MB. The most pronounced differences in the reactivity of the parent Nb2O5 and phosphate-doped samples were observed under strongly acidic conditions (pH ~ 2.4), at which the most active modified catalysts (Nb/P molar ratio = 5/1) was approximately 6 times more efficient in the removal of MB. The observed enhancement of reactivity was attributed to the increased generation of singlet oxygen 1O2, which was identified as the main oxidizing agent responsible for efficient degradation of MB. To our knowledge, it is the first report revealing that phosphate doping of Nb2O5 resulted in an improved activity of niobia in the adsorption and degradation of organic pollutants.
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Affiliation(s)
- Lukasz Wolski
- Faculty of Chemistry, Adam Mickiewicz University, Poznań, ul. Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland.
| | - Kamila Sobańska
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland
| | - Grzegorz Nowaczyk
- NanoBioMedical Centre, Adam Mickiewicz University, Poznań, ul. Wszechnicy Piastowskiej 3, 61-614 Poznań, Poland
| | - Marcin Frankowski
- Faculty of Chemistry, Adam Mickiewicz University, Poznań, ul. Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Mariusz Pietrowski
- Faculty of Chemistry, Adam Mickiewicz University, Poznań, ul. Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Marcin Jarek
- NanoBioMedical Centre, Adam Mickiewicz University, Poznań, ul. Wszechnicy Piastowskiej 3, 61-614 Poznań, Poland
| | - Mateusz Rozmyślak
- Faculty of Chemistry, Adam Mickiewicz University, Poznań, ul. Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Piotr Pietrzyk
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland.
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14
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Zhou K, Li Y, Zhuang S, Ren J, Tang F, Mu J, Wang P. A novel electrochemical sensor based on CuO-CeO2/MXene nanocomposite for quantitative and continuous detection of H2O2. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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15
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Inoue H, Naya S, Akita A, Sugime H, Tada H. Photothermal Oxidation of Cinnamyl Alcohol with Hydrogen Peroxide Catalyzed by Gold Nanoparticle/Antimony‐Doped Tin Oxide Nanocrystals. Chemistry 2022; 28:e202201653. [DOI: 10.1002/chem.202201653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Haruki Inoue
- Graduate School of Science and Engineering Kindai University 3-4-1, Kowakae Higashi-Osaka Osaka 577-8502 Japan
| | - Shin‐ichi Naya
- Environmental Research Laboratory Kindai University 3-4-1, Kowakae Higashi-Osaka Osaka 577-8502 Japan
| | - Atsunobu Akita
- Graduate School of Science and Engineering Kindai University 3-4-1, Kowakae Higashi-Osaka Osaka 577-8502 Japan
| | - Hisashi Sugime
- Department of Applied Chemistry Faculty of Science and Engineering Kindai University 3-4-1, Kowakae Higashi-Osaka Osaka 577-8502 Japan
| | - Hiroaki Tada
- Graduate School of Science and Engineering Kindai University 3-4-1, Kowakae Higashi-Osaka Osaka 577-8502 Japan
- Department of Applied Chemistry Faculty of Science and Engineering Kindai University 3-4-1, Kowakae Higashi-Osaka Osaka 577-8502 Japan
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16
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A Review on the Catalytic Remediation of Dyes by Tailored Carbon Dots. WATER 2022. [DOI: 10.3390/w14091456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Water polluted with dyes has become a serious global concern during the twenty-first century, especially for developing countries. Such types of environmental contaminant pose a severe threat to biodiversity, ecosystems, and human health globally; therefore, its treatment is an utmost requirement. Advanced technologies including the use of nanomaterials represent a promising water treatment technology with high efficiencies, low production costs, and green synthesis. Among the nanomaterials, carbon dots, as a new class of carbon-based nanoparticles, have attracted attention due to their unique features and advantages over other nanomaterials, which include high water solubility, easy fabrication and surface functionalisation, excellent electron-donating ability, and low toxicity. Such properties make carbon dots potential nanocatalysts for the Fenton-like degradation of environmental pollutants in water. Although recent studies show that carbon dots can successfully catalyse the degradation of dyes, there are still limited and controversial studies on the ecotoxicity and fate of these nanoparticles in the environment. In this review, the authors aim to summarise the recent research advances in water remediation by technologies using carbon dots, discuss important properties and factors for optimised catalytic remediation, and provide critical analysis of ecotoxicity issues and the environmental fate of these nanoparticles.
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17
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Recent advances in ZnO-based photosensitizers: Synthesis, modification, and applications in photodynamic cancer therapy. J Colloid Interface Sci 2022; 621:440-463. [PMID: 35483177 DOI: 10.1016/j.jcis.2022.04.087] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Revised: 03/26/2022] [Accepted: 04/14/2022] [Indexed: 01/05/2023]
Abstract
Zinc oxide nanoparticles (ZnO NPs) are important semiconductor materials with interesting photo-responsive properties. During the past, ZnO-based NPs have received considerable attention for photodynamic therapy (PDT) due to their biocompatibility and excellent potential of generating tumor-killing reactive oxygen species (ROS) through gentle photodynamic activation. This article provides a comprehensive review of the recent developments and improvements in optical properties of ZnO NPs as photosensitizers for PDT. The optical properties of ZnO-based photosensitizers are significantly dependent on their charge separation, absorption potential, band gap engineering, and surface area, which can be adjusted/tuned by doping, compositing, and morphology control. Here, we first summarize the recent progress in the charge separation capability, absorption potential, band gap engineering, and surface area of nanosized ZnO-based photosensitizers. Then, morphology control that is closely related to their synthesis method is discussed. Following on, the state-of-art for the ZnO-based NPs in the treatment of hypoxic tumors is comprehensively reviewed. Finally, we provide some outlooks on common targeted therapy methods for more effective tumor killing, including the attachment of small molecules, antibodies, ligands molecules, and receptors to NPs which further improve their selective distribution and targeting, hence improving the therapeutic effectiveness. The current review may provide useful guidance for the researchers who are interested in this promising dynamic cancer treatment technology.
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18
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Resource Recycling Utilization of Distillers Grains for Preparing Cationic Quaternary Ammonium—Ammonium Material and Adsorption of Acid Yellow 11. SUSTAINABILITY 2022. [DOI: 10.3390/su14042469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Using distillers grains (DG) as raw material after pre-treatment with sodium hydroxide (NaOH) and modified with cationic etherification agent 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHPTAC), cationic quaternary ammonium distillers grains adsorption material (CDG) was successfully prepared. The optimal adsorption conditions were an adsorption temperature of 25 °C, adsorption time of 180 min, amount of adsorbent at 8.5 g/L, initial dye concentration of 100 mg/L, and pH of dye solution 7.0. The structure of CDG was characterized by FTIR, EDS, SEM, BET, ultraviolet spectrum analysis, and analysis of the zeta potential, while the adsorption mechanism was studied by adsorption kinetics, isotherms, and thermodynamics. The results showed that CHPTAC modified the distillers grains successfully and induced the formation of CDG with a large number of pore structures and good adsorption effect. The highest adsorption yield was above 98%, while after eight rounds of adsorption–desorption experiments, the adsorption rate was 81.80%. The adsorption mechanism showed that the adsorption process of acid yellow 11 (AY11) by CDG conforms to the pseudo-second-order kinetic model, mainly with chemical and physical adsorption such as pore adsorption and electrostatic adsorption. Thermodynamics conforms to the Freundlich isothermal model, and the adsorption process is a spontaneous, endothermic and entropy-increasing process.
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19
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González-Crisostomo JC, López-Juárez R, Yocupicio-Gaxiola RI, Villanueva E, Zavala-Flores E, Petranovskii V. Chabazite Synthesis and Its Exchange with Ti, Zn, Cu, Ag and Au for Efficient Photocatalytic Degradation of Methylene Blue Dye. Int J Mol Sci 2022; 23:ijms23031730. [PMID: 35163652 PMCID: PMC8836194 DOI: 10.3390/ijms23031730] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/19/2022] [Accepted: 01/30/2022] [Indexed: 02/06/2023] Open
Abstract
A chabazite-type zeolite was prepared by the hydrothermal method. Before ion exchange, the chabazite was activated with ammonium chloride (NH4Cl). The ion exchange process was carried out at a controlled temperature and constant stirring to obtain ion-exchanged chabazites of Ti4+ chabazite (TiCHA), Zn2+ chabazite (ZnCHA), Cu2+ chabazite (CuCHA), Ag+ chabazite (AgCHA) and Au3+ chabazite (AuCHA). Modified chabazite samples were characterized by X-ray diffraction (XRD), scanning electron microscope equipped with energy-dispersive spectroscopy (SEM-EDS), transmission electron microscopy (TEM), Fourier transform infrared (FTIR), N2 adsorption methods and UV–visible diffuse reflectance spectroscopy (DRS). XRD results revealed that the chabazite structure did not undergo any modification during the exchange treatments. The photocatalytic activity of chabazite samples was evaluated by the degradation of methylene blue (MB) in the presence of H2O2 under ultraviolet (UV) light illumination. The photodegradation results showed a higher degradation efficiency of modified chabazites, compared to the synthesized chabazite. CuCHA showed an efficiency of 98.92% in MB degradation, with a constant of k = 0.0266 min−1 following a first-order kinetic mechanism. Then, it was demonstrated that the modified chabazites could be used for the photodegradation of dyes.
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Affiliation(s)
- José C. González-Crisostomo
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autonoma de México, Km 107 Carretera Tijuana-Ensenada, Ensenada 22800, Mexico; (R.I.Y.-G.); (V.P.)
- Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California, Calzada Tecnológico, Mesa de Otay, Tijuana 22390, Mexico;
- Correspondence:
| | - Rigoberto López-Juárez
- Instituto de Investigaciones en Materiales, Unidad Morelia, Universidad Nacional Autónoma de México, Antigua Carretera a Pátzcuaro, ExHacienda San José de la Huerta, Morelia 58190, Mexico;
| | - Rosario Isidro Yocupicio-Gaxiola
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autonoma de México, Km 107 Carretera Tijuana-Ensenada, Ensenada 22800, Mexico; (R.I.Y.-G.); (V.P.)
| | - Eric Villanueva
- Facultad de Ciencias de la Ingeniería y Tecnología, Unidad Valle de las Palmas, Universidad Autónoma de Baja California, Blvd. Universitario, Tijuana 2150018, Mexico;
| | - Ethiel Zavala-Flores
- Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California, Calzada Tecnológico, Mesa de Otay, Tijuana 22390, Mexico;
| | - Vitalii Petranovskii
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autonoma de México, Km 107 Carretera Tijuana-Ensenada, Ensenada 22800, Mexico; (R.I.Y.-G.); (V.P.)
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20
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Mozgawa B, Sobańska K, Gryboś J, Pietrzyk P. Co3O4-ZrO2 and Co3O4-Nb2O5 crystalline-amorphous composites for H2O2 activation via Fenton-like and electroprotic processes – Proof of concept. Catal Today 2022. [DOI: 10.1016/j.cattod.2021.05.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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21
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Wu L, Guo P, Wang X, Li H, Li A, Chen K. Mechanism study of CoS 2/Fe(III)/peroxymonosulfate catalysis system: The vital role of sulfur vacancies. CHEMOSPHERE 2022; 288:132646. [PMID: 34699885 DOI: 10.1016/j.chemosphere.2021.132646] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 10/19/2021] [Accepted: 10/21/2021] [Indexed: 06/13/2023]
Abstract
Peroxymonosulfate (PMS) activation methods have attractive advantages in advanced oxidation process (AOPs) due to their powerful ability of directly or indirectly generating various reactive oxygen species (ROS). Herein, trace amount of Fe(III) ions were added into the commercial-CoS2/PMS system to improve the CoS2/PMS decomposition for organics removal. The organics removal efficiency could reach >90% towards methylene blue (MB), diclofenac sodium (DCF), sulfamethoxazole (SMX) and bisphenol A (BPA) in the CoS2/Fe(III)/PMS system, with the kinetic apparent rate constant kobs of 0.141, 0.206, 0.247 and 0.091 min-1, respectively. The synergistic effect between Fe(III) ions and sulfur-vacancies on CoS2 for PMS degradation were revealed for the first time in cobalt sulfides/PMS system. Quenching experiments and ESR analysis proved that 1O2 was the major ROS and was produced mainly by the hydrolysis of SO5•-. Besides, the high degradation efficiency was obtained by the contribution of SO4•- and •OH. Electron spin-resonance spectroscopy (ESR), cyclic voltammetry (CV) and Raman spectrum data revealed that the addition of Fe(III) ions could optimize the intensity of sulfur vacancies on the CoS2 surface, which hindered the PMS reduction ability of Co(II), but accelerated the PMS oxidation to form 1O2. The degradation path of MB was analyzed by liquid chromatograph-mass spectrometer (LC-MS). The mechanism studies speculated that the sulfur vacancies of CoS2 provided the binding sites for Fe(III) ions with Co(II), which facilitated the PMS activation by Co(III).
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Affiliation(s)
- Liyuan Wu
- Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China; Beijing Advanced Innovation Center for Future Urban Design, Beijing, 100044, China.
| | - Pengpeng Guo
- Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China; Beijing Advanced Innovation Center for Future Urban Design, Beijing, 100044, China.
| | - Xin Wang
- Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China; Beijing Advanced Innovation Center for Future Urban Design, Beijing, 100044, China.
| | - Haiyan Li
- Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China; Beijing Advanced Innovation Center for Future Urban Design, Beijing, 100044, China.
| | - Angzhen Li
- China Academy of Urban Planning and Design, Beijing, 100044, China.
| | - Kaiyu Chen
- Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China; Beijing Advanced Innovation Center for Future Urban Design, Beijing, 100044, China.
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22
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Methylene Blue Degradation Over Green Fe3O4 Nanocatalyst Fabricated Using Leaf Extract of Rosmarinus officinalis. Top Catal 2022. [DOI: 10.1007/s11244-021-01524-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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23
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Kuo KY, Chen SH, Hsiao PH, Lee JT, Chen CY. Day-night active photocatalysts obtained through effective incorporation of Au@Cu xS nanoparticles onto ZnO nanowalls. JOURNAL OF HAZARDOUS MATERIALS 2022; 421:126674. [PMID: 34315025 DOI: 10.1016/j.jhazmat.2021.126674] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 07/09/2021] [Accepted: 07/15/2021] [Indexed: 06/13/2023]
Abstract
Photocatalytic degradation of organic dyes has been considered one of the promising solutions that enabled to effectively treat the demanding pollutants in wastewater. Yet, insight into the photocatalytic process under both illumination and dark conditions were hitherto missing. Herein, by virtue of incorporating the core-shell Au@CuxS nanoparticles to the ZnO nanowalls synthesized via all-solution synthesis, the intriguing heterostructures allowed to trigger the extraordinary capability of dye degradation either under light irradiance or dark environment. It was found that the coexistence of bi-constituted Cu2S/CuS shells on Au nanoparticles obtained with turning the concentrations of sulfurization acted as the decisive role on day-night active degradation performance, where the degradation efficiency was more than 8.3 times beyond sole ZnO sheets. The mediation of remarkable visible-light absorption and efficient charge separation due to band alignment of heterojunctions were responsible for the improved photodegradation efficiency under visible illuminations. Moreover, at dark environment, the involving peroxidase-like activity of CuxS shells with the mediation of Au nanoparticles facilitated the catalytic formation of hydroxyl radicals, manifesting the oxidative degradation of MB dye. Such all-day active photocatalysts further displayed the capability for the recycling treatment of MB dye, which offered the pathways to potentially treat the organic wastewater.
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Affiliation(s)
- Kuan-Yi Kuo
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan 70101, Taiwan
| | - Shih-Hsiu Chen
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan 70101, Taiwan
| | - Po-Hsuan Hsiao
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan 70101, Taiwan
| | - Jui-Teng Lee
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan 70101, Taiwan
| | - Chia-Yun Chen
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan 70101, Taiwan; Hierarchical Green-Energy Materials (Hi-GEM) Research Center, National Cheng Kung University, Tainan 70101, Taiwan.
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24
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Beker SA, Khudur LS, Cole I, Ball AS. Catalytic degradation of methylene blue using iron and nitrogen-containing carbon dots as Fenton-like catalysts. NEW J CHEM 2022. [DOI: 10.1039/d1nj04761b] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Carbon dots were modified with iron and nitrogen groups to produce specific surface groups and charge which demonstrated high efficiency for the Fenton-like degradation of methylene blue whilst markedly minimising its effluent toxicity.
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Affiliation(s)
- Sabrina A. Beker
- School of Science, STEM College, RMIT University, Bundoora, VIC 3083, Australia
| | - Leadin S. Khudur
- School of Science, STEM College, RMIT University, Bundoora, VIC 3083, Australia
| | - Ivan Cole
- Advanced Manufacturing and Fabrication, School of Engineering, RMIT University, Melbourne, VIC 3000, Australia
| | - Andrew S. Ball
- School of Science, STEM College, RMIT University, Bundoora, VIC 3083, Australia
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25
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Bharti K, Sadhu KK. Syntheses of metal oxide-gold nanocomposites for biological applications. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100288] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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26
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Construction of a 2D Polymer by Rigid Dicarboxylate and Methylimidazol Derivatives: Structure and Photocatalytic Feature. J Inorg Organomet Polym Mater 2021. [DOI: 10.1007/s10904-021-02150-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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27
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Chidambaram S, Ganesan MK, Sivakumar M, Pandiaraj S, Muthuramamoorthy M, Basavarajappa S, Abdullah Al-Kheraif A, Aruna Kumari ML, Grace AN. Au integrated 2D ZnO heterostructures as robust visible light photocatalysts. CHEMOSPHERE 2021; 280:130594. [PMID: 33962298 DOI: 10.1016/j.chemosphere.2021.130594] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 04/05/2021] [Accepted: 04/12/2021] [Indexed: 06/12/2023]
Abstract
Integration of semiconducting nanostructures with noble metal nanoparticles are turning highly desirable for cost efficient energy and environmental related applications. From this viewpoint, we report on a facile aqueous synthesis of polymer capped gold (Au) nanoparticles on free standing 2D layered structures of zinc oxide (ZnO) to result with ZnO/Au nanocomposites. Concentration of Au nanoparticles were observed to promote the preferential growth of ZnO along the (002) wurtzite plane. The ZnO/Au structures and their morphological dissemination was noted to be of few. This flake like structure was also noted to be greatly influenced by the concentration of Au in the colloidal blend. Optical band edge transformations noted in the absorption spectra across the lower wavelength region and the shift in surface plasmon resonance (SPR) towards the red region of the visible spectrum signify the improved absorptivity of the heterostructures along the visible spectrum. These heterostructures exhibited remarkable visible light driven photocatalytic activity (99% efficiency) on par with pristine ZnO. The findings also attest this new class of composite structures to open up new openings in diversified solar energy conversion related functions.
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Affiliation(s)
- Siva Chidambaram
- Division of Nanoscience and Technology, Anna University-BIT Campus, Tiruchirappalli, 620024, India; Department of Physics and Nanotechnology, College Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, 603 203, Chengalpattu, Tamilnadu, India
| | - Mohan Kumar Ganesan
- Quantum-Functional Semiconductor Research Center (QSRC), South Korea; Nano-Information Technology Academy (NITA), Dongguk University, Seoul, South Korea.
| | - Muthusamy Sivakumar
- Division of Nanoscience and Technology, Anna University-BIT Campus, Tiruchirappalli, 620024, India.
| | - Saravanan Pandiaraj
- Department of Self Development Skills, CFY Deanship, King Saud University, Riyadh, Saudi Arabia.
| | | | - Santhosh Basavarajappa
- Dental Biomaterials Research Chair, Dental Health Department, College of Applied Medical Sciences, King Saud University, P.O. Box: 10219, Riyadh 11433, Saudi Arabia
| | - Abdulaziz Abdullah Al-Kheraif
- Dental Biomaterials Research Chair, Dental Health Department, College of Applied Medical Sciences, King Saud University, P.O. Box: 10219, Riyadh 11433, Saudi Arabia
| | - M L Aruna Kumari
- Department of Chemistry, Ramaiah College of Arts, Science and Commerce, Bengaluru, 560054, India
| | - Andrews Nirmala Grace
- Centre for Nanotechnology Research, Vellore Institute of Technology, Vellore, 632014, Tamil Nadu, India
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28
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Habib IY, Burhan J, Jaladi F, Lim CM, Usman A, Kumara N, Tsang SCE, Mahadi AH. Effect of Cr doping in CeO2 nanostructures on photocatalysis and H2O2 assisted methylene blue dye degradation. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.04.008] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Phuruangrat A, Prapassornwattana P, Thongtem S, Thongtem T. Synthesis of Heterostructure Au/ZnO Nanocomposites by Sonochemical-Assisted Deposition Method and Their Photodegradation for Methylene Blue. RUSS J INORG CHEM+ 2021. [DOI: 10.1134/s0036023621040185] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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30
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Ali Khan S, Bakhsh EM, Asiri AM, Bahadar Khan S. Synthesis of zero-valent Au nanoparticles on chitosan coated NiAl layered double hydroxide microspheres for the discoloration of dyes in aqueous medium. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 250:119370. [PMID: 33412468 DOI: 10.1016/j.saa.2020.119370] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/28/2020] [Accepted: 12/18/2020] [Indexed: 06/12/2023]
Abstract
The catalyst activity of the nano Au was largely dependent on the particle size and the structure of the supported matrix to avoid particle agglomeration. Chitosan (CS) and CS coated layered double hydroxide of NiAl (LDH) microsphere were designed through a simple and an economic casting method. The CS and LDH microsphere were used for the impregnation and support of Au NPs and represented as Au/CS and Au/LDH and used for the sole and concurrent discoloration of methylene blue (MB) and rhodamine B (RB) dyes. The aim of the incorporation of NiAl-LDH to the CS host polymer is to increase the binding capacity of CS with Au NPs to make it more stable. The Au/LDH displaying stronger catalyst activity for both dyes discoloration, while found highly selective for MB dye. The high catalyst activity of Au/LDH is due to their small crystallite size which is 1.02 nm compared to 6.75 nm in Au/CS derived from Scherer's equation. The kapp value based on zero-order kinetics was higher with Au/LDH against MB and RB dyes which are 3.5 × 10-1 and 1.4 × 10-1 min-1 respectively.
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Affiliation(s)
- Shahid Ali Khan
- Department of Chemistry, University of Swabi, Anbar-23561, Khyber Pakhtunkhwa, Pakistan.
| | - Esraa M Bakhsh
- Department of Chemistry, King Abdulaziz University, P.O. Box 80203, Jeddah, Saudi Arabia 21589
| | - Abdullah M Asiri
- Department of Chemistry, King Abdulaziz University, P.O. Box 80203, Jeddah, Saudi Arabia 21589; Center of Excellence for Advanced Materials, King Abdulaziz University, P.O. Box 80203, Jeddah, Saudi Arabia 21589, Saudi Arabia.
| | - Sher Bahadar Khan
- Department of Chemistry, King Abdulaziz University, P.O. Box 80203, Jeddah, Saudi Arabia 21589.
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31
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Raha S, Ahmaruzzaman M. Novel magnetically retrievable In 2O 3/MoS 2/Fe 3O 4 nanocomposite materials for enhanced photocatalytic performance. Sci Rep 2021; 11:6379. [PMID: 33737582 PMCID: PMC7973746 DOI: 10.1038/s41598-021-85532-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 03/02/2021] [Indexed: 12/04/2022] Open
Abstract
The current work involves synthesis of hybrid nanomaterial of In2O3/MoS2/Fe3O4 and their applications as photocatalysts for disintegration of esomeprazole under visible light illumination. The data emerged from various analyses testified to the successful construction of the desired nano-scaled hybrid photocatalyst. Tauc plot gave the band gap of In2O3/MoS2/Fe3O4 to be ~ 2.15 eV. Synergistic effects of the integrant components enabled efficacious photocatalytic performances of the nanocomposite. The nanohybrid photocatalyst In2O3/MoS2/Fe3O4 showed photodecomposition up to ~ 92.92% within 50 min. The current work realizes its objective of constructing metal oxide based hybrid nano-photocatalyst supported on MoS2 sheets for activity in the visible spectrum, which displayed remarkable capacity of disintegrating emerging persistent organic contaminants and are magnetically recoverable.
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Affiliation(s)
- Sauvik Raha
- Department of Chemistry, National Institute of Technology Silchar, Silchar, Assam, 788010, India
| | - Md Ahmaruzzaman
- Department of Chemistry, National Institute of Technology Silchar, Silchar, Assam, 788010, India.
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32
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Yu W, Zhao L. Chemiluminescence detection of reactive oxygen species generation and potential environmental applications. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2021.116197] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Significantly enhancement of sunlight photocatalytic performance of ZnO by doping with transition metal oxides. Sci Rep 2021; 11:2804. [PMID: 33531518 PMCID: PMC7854666 DOI: 10.1038/s41598-020-78568-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 11/17/2020] [Indexed: 12/03/2022] Open
Abstract
In this study we report, the synthesis of ZnO and its doping with Transition Metal Oxides -TMO-, such as Cr2O3, MnO2, FeO, CoO, NiO, Cu2O and CuO. Various characterization techniques were employed to investigate the structural properties. The X-ray diffraction (XRD) data and Rietveld refinement confirmed the presence of TMO phases and that the ZnO structure was not affected by the doping with TMO which was corroborated using transmission Electron microscopy (TEM). Surface areas were low due to blockage of adsorption sites by particle aggregation. TMO doping concentration in the range of 3.7–5.1% was important to calculate the catalytic activity. The UV–Visible spectra showed the variation in the band gap of TMO/ZnO ranging from 3.45 to 2.46 eV. The surface catalyzed decomposition of H2O2 was used as the model reaction to examine the photocatalytic activity following the oxygen production and the systems were compared to bulk ZnO and commercial TiO2-degussa (Aeroxyde-P25). The results indicate that the introduction of TMO species increase significantly the photocatalytic activity. The sunlight photocatalytic performance in ZnO-doped was greater than bulk-ZnO and in the case of MnO2, CoO, Cu2O and CuO surpasses TiO2 (P25-Degussa). This report opens up a new pathway to the design of high-performance materials used in photocatalytic degradation under visible light irradiation.
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Yao Y, Yuan J, Shen M, Du B. Hexylresorcinol calix[4]arene-assisted synthesis of ZnO–Au micro–nano materials with enhanced photodegradation performance to degrade harmful organic compounds. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00968k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
HRCA not only acts as a reducing agent, but also plays a role in morphology regulation in the synthesis of ZnO–Au micro–nano materials. Gold particles deposited on the formed ZnO sheets and prevented the sheet-like ZnO from accumulating.
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Affiliation(s)
- Yufeng Yao
- Center of Analysis and Testing, School of Chemistry & Environmental Engineering, Yancheng Teachers University, Yancheng, Jiangsu 224007, PR China
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
- Yangzhou University, Yangzhou, Jiangsu 225002, PR China
| | - Jiayi Yuan
- Center of Analysis and Testing, School of Chemistry & Environmental Engineering, Yancheng Teachers University, Yancheng, Jiangsu 224007, PR China
| | - Ming Shen
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
- Yangzhou University, Yangzhou, Jiangsu 225002, PR China
| | - Bin Du
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
- Yangzhou University, Yangzhou, Jiangsu 225002, PR China
- College of Chemical Engineering, Yangzhou Polytechnic Institute, Yangzhou, Jiangsu, 225127, China
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Zhou Y, Zhang Y, Li Z, Hao C, Wang Y, Li Y, Dang Y, Sun X, Han G, Fu Y. Oxygen reduction reaction electrocatalysis inducing Fenton-like processes with enhanced electrocatalytic performance based on mesoporous ZnO/CuO cathodes: Treatment of organic wastewater and catalytic principle. CHEMOSPHERE 2020; 259:127463. [PMID: 32599388 DOI: 10.1016/j.chemosphere.2020.127463] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 05/27/2020] [Accepted: 06/16/2020] [Indexed: 06/11/2023]
Abstract
To treat typical organic wastewater efficiently, a novel Fenton-like processes based on ZnO/CuO composite cathode induced by oxygen reduction reaction (ORR) electrocatalysis with enhanced electrocatalytic performance was established successfully. Electrochemical testing investigation indicated that the ZnO/CuO cathode possessed conspicuous redox peak and better conductivity than uncompounded electrodes. Additionally, the removal efficiency of methylene blue and its chemical oxygen demand (COD) reached 96.4% and 70.8% after 120 min, respectively. Next, the feasibility of the material in practical application was also discussed. Subsequently, electrocatalytic principle based on valence state changes of metal elements on the electrode surface were also studied by x-ray photoelectron spectroscopy (XPS). Redox reactions between the active species H2O2 and the species Cu+ promoting Fenton-like processes were deduced. Namely, the conversion of Cu(I) and Cu(II) on the electrode surface was accompanied by OH generation. The combination of ZnO and CuO improved the surface morphology, increasing the active site of ORR and the yield of H2O2, thus greatly enhanced the Fenton-like activity. Finally, the main intermediates were identified by Gas chromatography-mass spectrometer (GC-MS), and possible pathways for dye degradation were proposed. In short, the research of ZnO/CuO cathode provided great significance for heterogeneous Fenton-like degradation and also showed its application potential in water treatment and remediation.
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Affiliation(s)
- Yuanzhen Zhou
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
| | - Yichen Zhang
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Zonglu Li
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Chentao Hao
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Yao Wang
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Yang Li
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Yuan Dang
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Xiaoqin Sun
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Guoping Han
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Yile Fu
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
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Anukorn Phuruangrat, Prapassornwattana P, Thongtem S, Thongtem T. Synthesis of Heterostructure Au/ZnO Nanocomposites by Microwave-Assisted Deposition Method and Their Photocatalytic Activity in Methylene Blue Degradation. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2020. [DOI: 10.1134/s0036024420070225] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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37
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Effect of Mn/Cu co-doping on the structural, optical and photocatalytic properties of ZnO nanorods. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128071] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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38
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Photocatalytic degradation and adsorption of phenol by solvent-controlled TiO2 nanosheets assisted with H2O2 and FeCl3: Kinetic, isotherm and thermodynamic analysis. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112941] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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39
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Active Synthesis of Graphene Nanosheet-Embedded PbS Octahedral Nanocubes for Prompt Sonocatalytic Degradation. J Inorg Organomet Polym Mater 2020. [DOI: 10.1007/s10904-020-01531-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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40
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Potassium Ferrite as Heterogeneous Photo-Fenton Catalyst for Highly Efficient Dye Degradation. Catalysts 2020. [DOI: 10.3390/catal10030293] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this work, hexagon-shaped potassium ferrite (K2Fe4O7) crystals with different sizes were prepared using the hydrothermal method. The crystals showed a narrow band gap of 1.44 eV, revealed by UV-visible diffuse reflectance spectroscopy, and was thus used as a heterogeneous Fenton catalyst to degrade methylene blue (MB) and crystal violet (CV) in the presence of green oxidant H2O2 under visible-light irradiation. Among the investigated crystals, the as-prepared one with an average size of 20 µm (KFO-20) exhibited better photocatalytic activity due to its high surface area. When it was used as a photo-Fenton catalyst, 100% MB and 92% CV were degraded within 35 min. Moreover, the catalyst maintained high photocatalytic activity and was stable after four continuous cycles. The trapping experiments showed that the active hydroxyl radical (·OH) was dominant in the photo-Fenton reaction. Therefore, this new photo-Fenton catalyst has great potential for the photocatalytic degradation of dye contaminants in water.
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Beker SA, Truskewycz A, Cole I, Ball AS. Green synthesis of Opuntia-derived carbon nanodots for the catalytic decolourization of cationic dyes. NEW J CHEM 2020. [DOI: 10.1039/d0nj03013a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Carbon nanodots, rich in functional groups and synthesised using green precursors, catalyse the decolourization of dyes under mild conditions.
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Affiliation(s)
- Sabrina A. Beker
- Centre for Environmental Sustainability and Remediation
- School of Science
- RMIT University
- Bundoora
- Australia
| | - Adam Truskewycz
- Advanced Manufacturing and Fabrication
- School of Engineering
- RMIT University
- Melbourne
- Australia
| | - Ivan Cole
- Advanced Manufacturing and Fabrication
- School of Engineering
- RMIT University
- Melbourne
- Australia
| | - Andrew S. Ball
- Centre for Environmental Sustainability and Remediation
- School of Science
- RMIT University
- Bundoora
- Australia
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Ling XY, Wang J, Gong C, Lu L, Singh AK, Kumar A, Sakiyama H, Yang Q, Liu J. Modular construction, magnetism and photocatalytic properties of two new metal-organic frameworks based on a semi-rigid tetracarboxylate ligand. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.07.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Di X, Guo F, Zhu Z, Xu Z, Qian Z, Zhang Q. In situ synthesis of ZnO–GO/CGH composites for visible light photocatalytic degradation of methylene blue. RSC Adv 2019; 9:41209-41217. [PMID: 35540050 PMCID: PMC9076400 DOI: 10.1039/c9ra09260a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 12/09/2019] [Indexed: 11/21/2022] Open
Abstract
A novel ZnO–GO/CGH composite was prepared using an in situ synthesis process for photodegradation of methylene blue under visible light illumination. The chitin–graphene composite hydrogel (CGH) was used to provide uniform binding of the nano ZnO–GO composite to the hydrogel surface and prevent their agglomeration. GO provides multi-dimensional protons and electron transport channels for ZnO with a flower-like structure, which possessed improved photo-catalytic activity. SEM analysis indicates that the hydrogel has good adsorption properties with rougher surfaces and porous microstructure, which enables it to adsorb the dyes effectively. Under synergetic enhancement of adsorption and photo-catalysis, catalytic activity and nano ZnO–GO/CGH recycling improved greatly. Synthesized nano ZnO–GO/CGH showed high dye removal efficiency of 99%, about 2.2 times that of the pure chitin gel under the same condition. This suggests the potential application of the new photocatalytic composites to remove organic dyes from wastewater. A novel ZnO–GO/CGH composite was prepared using an in situ synthesis process for photodegradation of methylene blue under visible light illumination.![]()
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Affiliation(s)
- Xiaoxuan Di
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education)
- School of Ocean Science and Technology
- Dalian University of Technology
- Panjin 124221
- China
| | - Feng Guo
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education)
- School of Ocean Science and Technology
- Dalian University of Technology
- Panjin 124221
- China
| | - Zihan Zhu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education)
- School of Ocean Science and Technology
- Dalian University of Technology
- Panjin 124221
- China
| | - Zhonghao Xu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education)
- School of Ocean Science and Technology
- Dalian University of Technology
- Panjin 124221
- China
| | - Ziqi Qian
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education)
- School of Ocean Science and Technology
- Dalian University of Technology
- Panjin 124221
- China
| | - Qian Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education)
- School of Ocean Science and Technology
- Dalian University of Technology
- Panjin 124221
- China
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