References

1. V. Hasija, P. Raizada, A. Sudhaik, K. Sharma, A. Kumar, P. Singh, S.B. Jonnalagadda, V.K. Thakur, Recent advances in noble metal free doped graphitic carbon nitride based nanohybrids for photocatalysis of organic contaminants in water: a review, Appl. Mater. Today, 15 (2019) 494–524.
2. V. Hasija, A. Sudhaik, P. Raizada, A. Hosseini-Bandegharaei, P. Singh, Carbon quantum dots supported AgI/ZnO/phosphorus doped graphitic carbon nitride as Z-scheme photocatalyst for efficient photodegradation of 2,4-dinitrophenol, J. Environ. Chem. Eng., 7 (2019) 103272.
3. M. Pirhashemi, A. Habibi-Yangjeh, S.R. Pouran, Review on the criteria anticipated for the fabrication of highly efficient ZnObased visible-light-driven photocatalysts, J. Ind. Eng. Chem., 62 (2018) 1–25.
4. P. Raizada, A. Sudhaik, P. Singh, A. Hosseini-Bandegharaei, P. Thakur, Converting type II AgBr/VO into ternary Z scheme photocatalyst via coupling with phosphorus doped g-C₃N₄ for enhanced photocatalytic activity, Sep. Purif. Technol., 12 (2019) 115692.
5. P. Raizada, A. Sudhaik, P. Singh, P. Shandilya, V.K. Gupta, A. Hosseini-Bandegharaei, S. Agrawal, Ag₃PO₄ modified phosphorus and sulphur co-doped graphitic carbon nitride as a direct Z-scheme photocatalyst for 2,4-dimethyl phenol degradation, J. Photochem. Photobiol., A, 374 (2019) 22–35.
6. D. Xiao, K. Dai, Y. Qu, Y. Yin, H. Chen, Hydrothermal synthesis of α-Fe₂O₃/g-C₃N₄ composite and its efficient photocatalytic reduction of Cr(VI) under visible light, Appl. Surf. Sci., 358 (2015) 181–187.
7. A. Habibi-Yangjeh, M. Mousavi, K. Nakata, Boosting visiblelight photocatalytic performance of g-C₃N₄/Fe₃O₄ anchored with CoMoO₄ nanoparticles: novel magnetically recoverable photocatalysts, J. Photochem. Photobiol., A, 368 (2019) 120–136.
8. A. Sudhaik, P. Raizada, P. Shandilya, P. Singh, Magnetically recoverable graphitic carbon nitride and NiFe₂O₄ based magnetic photocatalyst for degradation of oxytetracycline antibiotic in simulated wastewater under solar light, J. Environ. Chem. Eng., 6 (2018) 3874–3883.
9. K. Sharma, V. Dutta, S. Sharma, P. Raizada, A. Hosseini-Bandegharaei, P. Thakur, P. Singh, Recent advances in enhanced photocatalytic activity of bismuth oxyhalides for efficient photocatalysis of organic pollutants in water: a review, J. Ind. Eng. Chem., 78 (2019) 1–20.
10. P. Shandilya, D. Mittal, A. Sudhaik, M. Soni, P. Raizada, A.K. Saini, P. Singh, GdVO₄ modified fluorine doped graphene nanosheets as dispersed photocatalyst for mitigation of phenolic compounds in aqueous environment and bacterial disinfection, Sep. Purif. Technol., 210 (2019) 804–816.
11. A. Sudhaik, P. Raizada, P. Shandilya, D.Y. Jeong, J.H. Lim, P. Singh, Review on fabrication of graphitic carbon nitride based efficient nanocomposites for photodegradation of aqueous phase organic pollutants, J. Ind. Eng. Chem., 67 (2018) 28–51.
12. A. Habibi-Yangjeh, M. Mousavi, Deposition of CuWO₄ nanoparticles over g-C₃N₄/Fe₃O₄ nanocomposite: novel magnetic photocatalysts with drastically enhanced performance under visible-light, Adv. Powder Technol., 29 (2018) 1379–1392.
13. P. Singh, P. Shandilya, P. Raizada, A. Sudhaik, A. Rahmani-Sani, A. Hosseini-Bandegharae, Review on various strategies for enhancing photocatalytic activity of graphene based nanocomposites for water purification, Arabian J. Chem., 13 (2018) 3498–3520.
14. S. Asadzadeh-Khaneghah, A. Habibi-Yangjeh, D. Seifzadeh, Graphitic carbon nitride nanosheets coupled with carbon dots and BiOI nanoparticles: boosting visible-light-driven photocatalytic activity, J. Taiwan Inst. Chem. Eng., 87 (2018) 98–111.
15. P. Singh, Sonu, P. Raizada, A. Sudhaik, P. Shandilya, P. Thakur, S. Agarwal, V.K. Gupta, Enhanced photocatalytic activity and stability of AgBr/BiOBr/graphene heterojunction for phenol degradation under visible light, J. Saudi Chem. Soc., 23 (2018) 586–599.
16. P. Singh, K. Sharma, V. Hasija, V. Sharma, S. Sharma, P. Raizada, M. Singh, A.K. Saini, A. Hosseini-Bandegharaei, V.K. Thakur, Systematic review on applicability of magnetic iron oxides– integrated photocatalysts for degradation of organic pollutants in water, Mater. Today Chem., 14 (2019) 100186.
17. N. Chandel, K. Sharma, A. Sudhaik, P. Raizada, A. Hosseini- Bandegharaei, V.K. Thakur, P. Singh, Magnetically separable ZnO/ZnFe₂O4 and ZnO/CoFe₂O₄ photocatalysts supported onto nitrogen doped graphene for photocatalytic degradation of toxic. dyes, Arabian J. Chem., 13 (2019) 4324–4340.
18. D. Kong, Y. Zheng, M. Kobielusz, Y. Wang, Z. Bai, W. Macyk, X. Wang, J. Tang, Recent advances in visible light-driven water oxidation and reduction in suspension systems, Mater. Today, 21 (2018) 897–924.
19. L. Chen, Y. Man, Z. Chen, Y. Zhang, Ag/g-C₃N₄ layered composites with enhanced visible light photocatalytic performance, Mater. Res. Express, 3 (2016) 115003.
20. S. Sharma, V. Dutta, P. Singh, P. Raizada, A. Rahmani-Sani, A. Hosseini-Bandegharaei, V.K. Thakur, Carbon quantum dot supported semiconductor photocatalysts for efficient degradation of organic pollutants in water: a review, J. Cleaner Prod., 228 (2019) 755–769.
21. M. Hadnadjev-Kostic, T. Vulic, R. Marinkovic-Neducin, D. Lončarević, J. Dostanić, S. Markov, D. Jovanović, Photo-induced properties of photocatalysts: a study on the modified structural, optical and textural properties of TiO₂–ZnAl layered double hydroxide based materials, J. Cleaner Prod., 164 (2017) 1–8.
22. R. Miao, Z. Luo, W. Zhong, S.Y. Chen, T. Jiang, B. Dutta, Y. Nasr, Y. Zhang, S.L. Suib, Mesoporous TiO₂ modified with carbon quantum dots as a high-performance visible light photocatalyst, Appl. Catal., B, 189 (2016) 26–38.
23. D. Cao, L. Pan, J. Li, X. Cheng, Z. Zhao, J. Xu, Q. Li, X. Wang, S. Li, J. Wang, Q. Liu, Investigation on the structures and magnetic properties of carbon or nitrogen doped cobalt ferrite nanoparticles, Sci. Rep., 8 (2018) 7916.
24. C. Borgohain, K.K. Senapati, K.C. Sarma, P. Phukan, A facile synthesis of nanocrystalline CoFe₂O₄ embedded onedimensional ZnO hetero-structure and its use in photocatalysis, J. Mol. Catal. A, 363–364 (2012) 495–500.
25. B. Joshi, E. Samuel, T.G. Kim, C.W. Park, Y.I. Kim, M.T. Swihart, W.Y. Yoon, S.S. Yoon, Supersonically spray-coated zinc ferrite/graphitic-carbon nitride composite as a stable high-capacity anode material for lithium-ion batteries, J. Alloys Compd., 768 (2018) 525–534.
26. A. Kalam, A.G. Al-Sehemi, M. Assiri, G. Du, T. Ahmad, I. Ahmad, M. Pannipara, Modified solvothermal synthesis of cobalt ferrite (CoFe₂O₄) magnetic nanoparticles photocatalysts for degradation of methylene blue with H₂O₂/visible light, Results Phys., 8 (2018) 1046–1053.
27. A. Arimi, L. Megatif, L.I. Granone, R. Dillert, D.W. Bahnemann, Visible-light photocatalytic activity of zinc ferrites, J. Photochem. Photobiol., A, 366 (2018) 118–126.
28. K. Maaz, A. Mumtaz, S.K. Hasanain, A. Ceylan, Synthesis and magnetic properties of cobalt ferrite (CoFe₂O₄) nanoparticles prepared by wet chemical route, J. Magn. Magn. Mater., 308 (2007) 289–95.
29. K.K. Kefeni, B.B. Mamba, T.A. Msagati, Application of spinel ferrite nanoparticles in water and wastewater treatment: a review, Sep. Purif. Technol., 188 (2017) 399–422.
30. H.J. Cui, J.W. Shi, B. Yuan, M.L. Fu, Synthesis of porous magnetic ferrite nanowires containing Mn and their application in water treatment, J. Mater. Chem. A, 1 (2013) 5902–5907.
31. P. Raizada, P. Thakur, A. Sudhaik, P. Singh, V.K. Thakur, A. Hosseini-Bandegharaei, Fabrication of dual Z-scheme photocatalyst via coupling of BiOBr/Ag/AgCl heterojunction with P and S co-doped g-C₃N₄ for efficient phenol degradation, Arabian J. Chem., 13 (2020) 4538–4552.
32. A. Hassani, P. Eghbali, A. Ekicibil, O. Metin, Monodisperse cobalt ferrite nanoparticles assembled on mesoporous graphitic carbon nitride (CoFe₂O₄/mpg-C₃N₄): a magnetically recoverable nanocomposite for the photocatalytic degradation of organic dyes, J. Magn. Magn. Mater., 456 (2018) 400–412.
33. L. Lu, Z. Lv, Y. Si, M. Liu, S. Zhang, Recent progress on band and surface engineering of graphitic carbon nitride for artificial photosynthesis, Appl. Surf. Sci., 462 (2018) 693–712.
34. S. Gautam, P. Shandilya, B. Priya, V.P. Singh, P. Raizada, R. Rai, M.A. Valente, P. Singh, Superparamagnetic MnFe₂O₄ dispersed over graphitic carbon sand composite and bentonite as magnetically recoverable photocatalyst for antibiotic mineralization, Sep. Purif. Technol., 172 (2017) 498–511.
35. S.C. Yan, Z.S. Li, Z.G. Zou, Photodegradation performance of g-C₃N₄ fabricated by directly heating melamine, Langmuir, 25 (2009) 10397–10401.
36. S.C. Yan, Z.S. Li, Z.G. Zou, Photodegradation of rhodamine B and methyl orange over boron-doped g-C₃N₄ under visible light irradiation, Langmuir, 26 (2010) 3894–3901.
37. F. Dong, Z. Zhao, T. Xiong, Z. Ni, W. Zhang, Y. Sun, W.K. Ho, In situ construction of g-C₃N₄/g-C₃N₄ metal-free heterojunction for enhanced visible-light photocatalysis, ACS Appl. Mater. Interfaces, 5 (2013) 11392–11401.
38. S. Asadzadeh-Khaneghah, A. Habibi-Yangjeh, K. Nakata, Decoration of carbon dots over hydrogen peroxide treated graphitic carbon nitride: exceptional photocatalytic performance in removal of different contaminants under visible light, J. Photochem. Photobiol., A, 374 (2019) 161–172.
39. M.J. Bojdys, J.O. Müller, M. Antonietti, A. Thomas, Ionothermal synthesis of crystalline, condensed, graphitic carbon nitride, Chem. Eur. J., 14 (2008) 8177–8182.
40. A. Kumar, P. Raizada, P. Singh, R. Saini, A. Saini, A. Hosseini- Bandegharaei, Perspective and status of polymeric graphitic carbon nitride based Z-scheme photocatalytic systems for sustainable photocatalytic water purification, Chem. Eng. J., (2019) 123496.
41. J. Wen, J. Xie, X. Chen, X. Li, A review on g-C₃N₄-based photocatalysts, Appl. Surf. Sci., 391 (2017) 72–123.
42. X. Bai, L. Wang, R. Zong, Y. Zhu, Photocatalytic activity enhanced via g-C₃N₄ nanoplates to nanorods, J. Phys. Chem. C, 117 (2013) 9952–9961.
43. L. Chen, W. Ma, J. Dai, J. Zhao, C. Li, Y. Yan, Facile synthesis of highly efficient graphitic-C₃N₄/ZnFe₂O₄ heterostructures enhanced visible-light photocatalysis for spiramycin degradation, J. Photochem. Photobiol., A, 328 (2016) 24–32.
44. L. Gan, S. Shang, C.W. Yuen, S.X. Jiang, E. Hu, Hydrothermal synthesis of magnetic CoFe₂O₄/graphene nanocomposites with improved photocatalytic activity, Appl. Surf. Sci., 351 (2015) 140–147.
45. R. Singh, J. Ladol, H. Khajuria, H.N. Sheikh, Nitrogen doped graphene nickel ferrite magnetic photocatalyst for the visible light degradation of methylene blue, Acta Chim. Sin., 64 (2017) 170–178.
46. T. Zhu, Y. Song, H. Ji, Y. Xu, Y. Song, J. Xia, S. Yin, Y. Li, H. Xu, Q. Zhang, H. Li, Synthesis of g-C₃N₄/Ag₃VO₄ composites with enhanced photocatalytic activity under visible light irradiation, Chem. Eng. J., 271 (2015) 96–105.
47. H. Xu, L. Ma, Z. Jin, Nitrogen-doped graphene: synthesis, characterizations and energy applications, J. Energy Chem., 27 (2018) 146–160.
48. K. Sridharan, T. Kuriakose, R. Philip, T.J. Park, Transition metal (Fe, Co and Ni) oxide nanoparticles grafted graphitic carbon nitrides as efficient optical limiters and recyclable photocatalysts, Appl. Surf. Sci., 308 (2014) 139–147.
49. K.K. Das, S. Patnaik, S. Mansingh, A. Behera, A. Mohanty, C. Acharya, K.M. Parida, Enhanced photocatalytic activities of polypyrrole sensitized zinc ferrite/graphitic carbon nitride n-n heterojunction towards ciprofloxacin degradation, hydrogen evolution and antibacterial studies, J. Colloid Interface Sci., 561 (2020) 551–567.
50. Y. Cui, Y. Tang, X. Wang, Template-free synthesis of graphitic carbon nitride hollow spheres for photocatalytic degradation of organic pollutants, Mater. Lett., 161 (2015) 197–200.
51. R. Li, M. Cai, Z. Xie, Q. Zhang, Y. Zeng, H. Liu, W. Lv, Construction of heterostructured CuFe₂O₄/g-C₃N₄ nanocomposite as an efficient visible light photocatalyst with peroxydisulfate for the organic oxidation, Appl. Catal., B, 244 (2019) 974–982.
52. S. Singh, S. Singhal, Transition metal doped cobalt ferrite nanoparticles: efficient photocatalyst for photodegradation of textile dye, Mater. Today, 14 (2019) 453–460.
53. W. Wang, N. Li, K. Hong, H. Guo, R. Ding, Z. Xia, Z-scheme recyclable photocatalysts based on flower-like nickel zinc ferrite nanoparticles/ZnO nanorods: enhanced activity under UV and visible irradiation, J. Alloys Compd., 777 (2019) 1108–1114.
54. D.R. Paul, R. Sharma, P. Panchal, S.P. Nehra, A.P. Gupta, A. Sharma, Synthesis, characterization and application of silver doped graphitic carbon nitride as photocatalyst towards visible light photocatalytic hydrogen evolution, Int. J. Hydrogen Energy, (2019), doi: 10.1016/j.ijhydene.2019.06.061.
55. K. Singh, The use of nitrogen adsorption for the characterisation of porous materials, Colloids Surf., A., 187 (2001) 3–9.
56. W. Chen, Z.C. He, G.B. Huang, C.L. Wu, W.F. Chen, X.H. Liu, Direct Z-scheme 2D/2D MnIn₂S₄/g-C₃N₄ architectures with highly efficient photocatalytic activities towards treatment of pharmaceutical wastewater and hydrogen evolution, Chem. Eng. J., 359 (2019) 244–253.
57. S. Huang, Y. Xu, M. Xie, H. Xu, M. He, J. Xia, L. Huang, H. Li, Synthesis of magnetic CoFe₂O₄/g-C₃N₄ composite and its enhancement of photocatalytic ability under visible-light, Colloids Surf., A, 478 (2015) 71–80.
58. P. Singh, S. Gautam, P. Shandilya, B. Priya, V.P. Singh, P. Raizada, Graphene bentonite supported ZnFe₂O₄ as superparamagnetic photocatalyst for antibiotic degradation, Adv. Mater. Lett., 8 (2017) 229–238.
59. P. Shandilya, D. Mittal, M. Soni, P. Raizada, A. Hosseini- Bandegharaei, A.K. Saini, P. Singh, Fabrication of fluorine doped graphene and SmVO₄ based dispersed and adsorptive photocatalyst for abatement of phenolic compounds from water and bacterial disinfection, J. Cleaner Prod., 203 (2018) 386–399.
60. P. Shandilya, D. Mittal, M. Soni, P. Raizada, A. Hosseini-Bandegharaei, A.K. Saini, P. Singh, Fabrication of fluorine doped graphene and SmVO₄ based dispersed and adsorptive photocatalyst for abatement of phenolic compounds from water and bacterial disinfection, J. Cleaner Prod., 203 (2018) 386–399.
61. V. Dutta, P. Singh, P. Shandilya, S. Sharma, P. Raizada, A.K. Saini, V.K. Gupta, A. Hosseini-Bandegharaei, S. Agarwal, A. Rahmani-Sani, Review on advances in photocatalytic water disinfection utilizing graphene and graphene derivatives-based nanocomposites, J. Environ. Chem. Eng., 7 (2019) 103–132.
62. F.A. Harraz, R.M. Mohamed, M.M. Rashad, Y.C. Wang, W. Sigmund, Magnetic nanocomposite based on titania–silica/cobalt ferrite for photocatalytic degradation of methylene blue dye, Ceram. Int., 40 (2014) 375–384.
63. S. Xu, D. Feng, W. Shangguan, Preparations and photocatalytic properties of visible-light-active zinc ferrite-doped TiO₂ photocatalyst, J. Phys. Chem. C., 113 (2019) 2463–2467.
64. P.P. Hankare, R.P. Patil, A.V. Jadhav, K.M. Garadkar, R. Sasikala, Enhanced photocatalytic degradation of methyl red and thymol blue using titania-alumina-zinc ferrite nanocomposite, Appl. Catal., B, 107 (2011) 333–339.
65. V. Dutta, S. Sharma, P. Raizada, A. Hosseini-Bandegharaei, V.K. Gupta, P. Singh, Review on augmentation in photocatalytic activity of CoFe₂O₄ via heterojunction formation for photocatalysis of organic pollutants in water, J. Saudi Chem. Soc., 23 (2019) 1119–1136.
66. D.R. Paul, R. Sharma, S.P. Nehra, A. Sharma, Effect of calcination temperature, pH and catalyst loading on photodegradation efficiency of urea derived graphitic carbon nitride towards methylene blue dye solution, RSC Adv., 9 (2019) 15381–15391.
67. D.R. Paul, R. Sharma, P. Panchal, R. Malik, A. Sharma, V.K. Tomer, S.P. Nehra, Silver doped graphitic carbon nitride for the enhanced photocatalytic activity towards organic dyes, J. Nanosci. Nanotechnol., 19 (2019) 5241–5248.
68. P. Panchal, D.R. Paul, A. Sharma, D. Hooda, R. Yadav, P. Meena, S.P. Nehra, Phytoextract mediated ZnO/MgO nanocomposites for photocatalytic and antibacterial activities, J. Photochem. Photobiol., A, 385 (2019) 112049.
69. D. Patidar, A. Yadav, D.R. Paul, A. Sharma, S.P. Nehra, Nanohybrids cadmium selenide-reduced graphene oxide for improving photo-degradation of methylene blue, Physica E, 114 (2019) 113560.