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Guo J, Fan Y, Qiao C, Ma X, Dong X, Zeng H. Harnessing coal and coal waste for environmental conservation: A review of photocatalytic materials. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 946:174437. [PMID: 38960199 DOI: 10.1016/j.scitotenv.2024.174437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 06/29/2024] [Accepted: 06/30/2024] [Indexed: 07/05/2024]
Abstract
Fossil fuels, especially coal, have played a pivotal role in driving technological and economic advancements over the past century, though accompanied by numerous environmental challenges. Rapid progress in green and sustainable energy sources, including tidal, wind, and solar energy, coupled with growing environmental concerns, the conventional coal industry is experiencing a sustained decline in both size and financial viability. This situation necessitates the urgent adoption of advanced approaches to coal utilization. Beyond serving as an energy source, coal and its by-products, known as coal waste, can serve as valuable resources for the development of advanced materials, including photocatalysts. The advancement of photocatalytic materials derived from coal and coal waste can capitalize on these natural carbon and mineral sources, providing a viable solution to numerous environmental challenges. Currently, research in this domain remains in its early stages, with existing studies primarily focusing on specific types of photocatalysts or particular aspects of the fabrication process. Therefore, available coal-based and coal waste-based photocatalytic materials were systematically examined and categorized into six types according to their composition and dimensional/structural characteristics. Each type of photocatalytic material was introduced, along with common fabrication and characterization technologies. Representative works were discussed in detail to highlight the unique features of different types of coal-based and coal waste-based photocatalytic materials. Furthermore, the promising applications of these materials in environmental protection and pollution treatment were summarized, while also addressing the challenges and prospects in this research field. This review comprehensively overviews the fundamental knowledge and recent advancements in photocatalytic materials derived from coal and coal waste, with the goal of catalyzing the development of next generation photocatalysts and contributing to the transformation of the conventional coal industry.
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Affiliation(s)
- Jiaqi Guo
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Yuping Fan
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
| | - Chenyu Qiao
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Xiaomin Ma
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
| | - Xianshu Dong
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China.
| | - Hongbo Zeng
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
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Jin H, Luo L, Naghizadeh M, Liu Q, Dong S, Huang T. Rapid photocatalytic reduction of hexavalent chromium over Z-scheme MgIn 2S 4/BiPO 4 heterojunction: Performance, DFT calculation and mechanism insight. CHEMOSPHERE 2023:139175. [PMID: 37301513 DOI: 10.1016/j.chemosphere.2023.139175] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 05/22/2023] [Accepted: 06/07/2023] [Indexed: 06/12/2023]
Abstract
The accumulation of highly fluid and biotoxic hexavalent chromium (Cr(VI)) impairs water ecosystems. It is urgent to quickly reduce Cr (VI) to trivalent chromium (Cr (III)) in wastewater. Hereby, Z-scheme MgIn2S4/BiPO4 heterojunction was prepared, and MB-30 (mass ratio of BiPO4 to composite) presented a rapid Cr(VI) (10 mg L-1) removal efficiency of 100% within 10 min, its kinetic rate constant was 9.0 and 30.1 folds that of MgIn2S4 and BiPO4, respectively. After four rounds, MB-30 maintained a high removal rate of 93.18% and stabilized crystal texture. First-principles calculations revealed that the formation of Z-scheme heterojunction could ameliorate charge generation, detachment, migration capability, and light utilization. Meanwhile, the coupling of S and O in the two components produced a tight S-O bond, which acted as an atomic-level access to promote carrier migration. The findings were consistent with the structure superiority and optical and electronic properties of MB-30. The Z-scheme pattern was substantiated based on multifarious experiments, which exhibited an elevated reduction potential while emphasizing the significance of interfacial chemical bond and the internal electric field (IEF) on carrier detachment and migration.
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Affiliation(s)
- Huijia Jin
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Linbo Luo
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Matin Naghizadeh
- Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, 76169, Iran
| | - Qian Liu
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Sheying Dong
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
| | - Tingling Huang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
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Xu Y, Tang H, Wu P, Chen M, Shang Z, Wu J, Zhu N. Manganese-doped hydroxyapatite as an effective adsorbent for the removal of Pb(II) and Cd(II). CHEMOSPHERE 2023; 321:138123. [PMID: 36781002 DOI: 10.1016/j.chemosphere.2023.138123] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 01/31/2023] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
The water polluted by lead(Pb(II)) and cadmium(Cd(II)) seriously endangers ecological safety and needs to be solved urgently. Because of the relatively low adsorption rate of pure hydroxyapatite for heavy metals, a series of manganese-doped hydroxyapatites (MnHAPs) were prepared by using manganese, a common impurity in hydroxyapatite, as a doping element to improve the adsorption performance. The structural and functional groups of the materials with different Mn/(Ca +Mn) molar ratios (0%, 5%, 10%, 20%, and 30%) were investigated by scanning electron microscope (SEM), Brunauer-Emmett-Teller (BET), X-Ray diffraction (XRD), Raman spectrometer and Fourier transform infrared spectroscopy (FTIR) characterization. The presence of manganese influenced the formation and growth of hydroxyapatite crystals, resulting in lattice distortion and a large number of lattice defects in materials. Among them, manganese-doped hydroxyapatite with a Mn/(Ca +Mn) molar ratio of 10% (MnHAP-10) could most effectively remove Pb(II) and Cd(II), with the adsorption capacity of 1806.09 mg g-1 for Pb(II) at pH = 5 and 176.88 mg g-1 for Cd(II) at pH = 5.5. Then the adsorption behavior and mechanism were further researched systemically. It was concluded that the immobilization of Pb(II) by MnHAP-10 was mainly through dissolution precipitation and ion exchange, while Cd(II) was adsorbed by ion exchange and electrostatic interaction. In conclusion, MnHAP-10 has the potential to be applied as an effective adsorbent for the removal of Pb(II) and Cd(II) pollution.
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Affiliation(s)
- Yijing Xu
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Hongmei Tang
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Pingxiao Wu
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou, 510006, PR China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, 510006, PR China.
| | - Meiqing Chen
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Zhongbo Shang
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Jiayan Wu
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Nengwu Zhu
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, PR China
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Li H, Li W, Li P, Yang P, Zhang T, Cheng Y. Influence of citrate/tartrate on chromite crystallization behavior and its potential environmental implications. JOURNAL OF HAZARDOUS MATERIALS 2023; 443:130155. [PMID: 36257108 DOI: 10.1016/j.jhazmat.2022.130155] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/01/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
The ferrite process has been developed to purify wastewater containing heavy metal ions and recycle valuable metals by forming chromium ferrite. However, organic matter has an important influence on the crystallization behavior and stability of chromite synthesized from chromium-containing wastewater. We focused on the influence and effect mechanism of two typical organic acid salts (citrate (CA) and tartrate (TA)) on the process of chromium mineralization. It was found that the presence of organic matter leads to the increase of the residual content of Cr in CA system (0.50 mmol/L) and TA system (0.61 mmol/L) in the solution, and the removal of chromium was mainly due to the surface adsorption of Fe(III) hydrolysate. The decreased crystallinity of mineralized products is ascribed to the completion of organic compounds with Fe(II) and Fe(III), which hinders the formation of ferrite precursors. There was bidentate and monodentate chelation between -COO- and metal ions in the CA system and TA system respectively, which resulted in a stronger affinity between CA and iron. This study provides the underlying mechanism for Cr(III) solid oxidation by the ferrite method in an organic matter environment and is of great significance to prevent and control chromium pollution in the environment.
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Affiliation(s)
- Hongzheng Li
- School of Advanced Manufacturing, Fuzhou University, 1 Shuicheng Road, Jinjiang, Fujian 362251, PR China
| | - Wen Li
- School of Advanced Manufacturing, Fuzhou University, 1 Shuicheng Road, Jinjiang, Fujian 362251, PR China.
| | - Pengxu Li
- School of Advanced Manufacturing, Fuzhou University, 1 Shuicheng Road, Jinjiang, Fujian 362251, PR China
| | - Peng Yang
- School of Advanced Manufacturing, Fuzhou University, 1 Shuicheng Road, Jinjiang, Fujian 362251, PR China
| | - Tingting Zhang
- School of Advanced Manufacturing, Fuzhou University, 1 Shuicheng Road, Jinjiang, Fujian 362251, PR China
| | - Yangjian Cheng
- School of Advanced Manufacturing, Fuzhou University, 1 Shuicheng Road, Jinjiang, Fujian 362251, PR China.
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Photocatalytic Cr(VI) reduction over MIL-88A(Fe) on polyurethane sponge: From batch to continuous-flow operation. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.108029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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Ajiboye TO, Imade EE, Oyewo OA, Onwudiwe DC. Silver functionalized gC3N4: Photocatalytic potency for chromium(VI) reduction, and evaluation of the antioxidant and antimicrobial properties. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114107] [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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Guo C, Wu S, Gao X, Li M, Long H. Mechanistic study of Cr (VI) removal by modified alginate/GO composite via synergistic adsorption and photocatalytic reduction. Int J Biol Macromol 2021; 189:910-920. [PMID: 34478793 DOI: 10.1016/j.ijbiomac.2021.08.203] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 11/26/2022]
Abstract
A novel composite material was prepared by blending graphene oxide into polyethyleneimine grafted sodium alginate. The synthesized material was investigated as adsorbent and photocatalyst for the removal of hexavalent chromium (Cr (VI)) from aqueous solutions. The composite material has shown remarkable removal efficiency for Cr (VI) in high initial concentration solutions as the removal rate reached 86.16% and 99.92% for adsorption and photoreduction, respectively. We discovered experimentally that the adsorption was dominated via electrostatic interaction while the blending of GO could contribute in stimulating electrons for the photoreduction process. Moreover, the photoreduction can alter the surface charge of chromium species, thus electrostatic repulsion could regenerating the active sites of composite spontaneously. The conduction band energy was calculated as -2.04 eV, which proved that blending GO can narrow the bandgap of the composite material, thus enhance the light response and the photoreduction ability towards Cr (VI).
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Affiliation(s)
- Cheng Guo
- Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Anhui University of Technology, Ministry of Education, Maanshan, Anhui 243002, China; School of Metallurgical Engineering, Anhui University of Technology, Maanshan, Anhui 243032, China
| | - Shaojie Wu
- School of Metallurgical Engineering, Anhui University of Technology, Maanshan, Anhui 243032, China
| | - Xiangpeng Gao
- Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Anhui University of Technology, Ministry of Education, Maanshan, Anhui 243002, China; School of Metallurgical Engineering, Anhui University of Technology, Maanshan, Anhui 243032, China.
| | - Mingyang Li
- School of Metallurgical Engineering, Anhui University of Technology, Maanshan, Anhui 243032, China
| | - Hongming Long
- Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Anhui University of Technology, Ministry of Education, Maanshan, Anhui 243002, China; School of Metallurgical Engineering, Anhui University of Technology, Maanshan, Anhui 243032, China
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Djellabi R, Zhao X, Ordonez MF, Falletta E, Bianchi CL. Comparison of the photoactivity of several semiconductor oxides in floating aerogel and suspension systems towards the reduction of Cr(VI) under visible light. CHEMOSPHERE 2021; 281:130839. [PMID: 34000659 DOI: 10.1016/j.chemosphere.2021.130839] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 04/08/2021] [Accepted: 05/04/2021] [Indexed: 06/12/2023]
Abstract
A massive amount of research has been done over the last three decades to develop photoactive materials which could be suitable for real-world use in water remediation sector. Water-floating photocatalysts could be one of the best options due to their technological characteristics in terms of efficiency and reasonability including a high oxygenation of the photocatalyst surface, a fully sunlight irradiation, easy recovery and reuse. In the present study, aerogel water-floating based materials were fabricated using poly(vinyl alcohol) and polyvinylidene fluoride as a polymer platform, and loaded with different semiconductors such as g-C3N4, MoO3, Bi2O3, Fe2O3 or WO3. The photocatalytic efficiencies of aerogel floating materials and the suspension of above-mentioned semiconductors were compared evaluating the photoreduction of Cr(VI) under visible light (λ > 420 nm). The results showed that Fe2O3 suspension was the most efficient but the slowest in floating system. On the contrary, g-C3N4 exhibited a good performance in suspension system, and on top of that it was very effective in floating system, wherein it ensures a total reduction of 10 ppm-Cr(VI) to Cr(III) within 20 min.
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Affiliation(s)
- Ridha Djellabi
- Università Degli Studi di Milano, Dip. Chimica and INSTM-UdR Milano, Via Golgi, 19, 20133, Milano, Italy.
| | - Xu Zhao
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Marcela Frias Ordonez
- Università Degli Studi di Milano, Dip. Chimica and INSTM-UdR Milano, Via Golgi, 19, 20133, Milano, Italy
| | - Ermelinda Falletta
- Università Degli Studi di Milano, Dip. Chimica and INSTM-UdR Milano, Via Golgi, 19, 20133, Milano, Italy
| | - Claudia L Bianchi
- Università Degli Studi di Milano, Dip. Chimica and INSTM-UdR Milano, Via Golgi, 19, 20133, Milano, Italy
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