References
  -  M. Rashad, T.A. Hamdalla, A.A.A. Darwish, S.M. Seleim,
		High performance efficiency of water purification using Cr2O3
    nanoparticles synthesized by thermal combustion technique,
  Mater. Res. Express, 6 (2019) 065048, doi: 10.1088/2053-1591/ab076c. 
 
  -  M. Rashad, H.A. Al-Aoh, Promising adsorption studies
    of bromophenol blue using copper oxide nanoparticles,
    Desal. Water Treat., 139 (2019) 360–368. 
 
  -  N.M. Shaalan, M. Rashad, A.H. Moharram, M.A. Abdel-Rahim,
    Promising methane gas sensor synthesized by microwaveassisted
    Co3O4 nanoparticles, Mater. Sci. Semicond. Process.,
  46 (2016) 1–5. 
 
  -  F. Ye, A. Ohmori, C. Li, New approach to enhance the
    photocatalytic activity of plasma sprayed TiO2 coatings using
  pn junctions, Surf. Coat. Technol., 184 (2004) 233–238. 
 
  -  M.N. Chong, B. Jin, C.W.K. Chow, C. Saint, Recent developments
    in photocatalytic water treatment technology: 
    a review,
    Water Res., 44 (2010) 2997–3027.  
  -  M. Rashad, N.M. Shaalan, A.M. Abd-Elnaiem, Degradation
    enhancement of methylene blue on ZnO nanocombs
    synthesized by thermal evaporation technique, Desal. Water
    Treat., 57 (2016) 26267–26273. 
 
  -  G. Kotan, F. Kardaş, Ö.A. Yokuş, O. Akyıldırım, H. Saral,
    T. Eren, M.L. Yola, N. Atar, A novel determination of curcumin
    via Ru@Au nanoparticle decorated nitrogen and sulfurfunctionalized
    reduced graphene oxide nanomaterials,
    Anal. Methods, 8 (2016) 401–408. 
 
  -  M.L. Yola, N. Atar, T. Eren, H. Karimi-Maleh, S. Wang,
    Correction: sensitive and selective determination of aqueous
    triclosan based on gold nanoparticles on polyoxometalate/reduced graphene oxide nanohybrid, RSC Adv., 5 (2015)
    72590–72591. 
 
  -  N. Atar, T. Eren, M.L. Yola, H. Gerengi, S. Wang, Fe@Ag nanoparticles
    decorated reduced graphene oxide as ultrahigh
    capacity anode material for lithium-ion battery, Ionics (Kiel),
    21 (2015) 3185–3192. 
 
  -  N. Atar, T. Eren, M.L. Yola, Ultrahigh capacity anode material
    for lithium ion battery based on rod gold nanoparticles
    decorated reduced graphene oxide, Thin Solid Films,
    590 (2015) 156–162. 
 
  -  L. Shao, X. Duan, Y. Li, F. Zeng, H. Ye, P. Ding, Two-dimensional
    Ga2O2 monolayer with tunable band gap and high hole
  mobility, Phys. Chem. Chem. Phys., 23 (2021) 666–673. 
 
  -  L. Zhao, S. Lam, Y. Thai, J. Sin, Fe2WO6 coupling on cube-like
    SrTiO3 as a highly active S-scheme heterojunction composite
    for visible light photocatalysis and antibacterial applications,
  Environ. Technol. Innovation, 28 (2022) 102941, doi: 10.1016/j.eti.2022.102941. 
 
  -  Y.-H. Chin, J.-C. Sin, S.-M. Lam, H. Zeng, H. Lin, H. Li, L. Huang,
    A.R. Mohamed, 3-D/3-D Z-Scheme heterojunction composite
    formed by Marimo-like Bi2WO6 and Mammillaria-like ZnO for
    expeditious sunlight photodegradation of dimethyl phthalate,
    Catalysts, 12 (2022) 1427, doi: 10.3390/catal12111427. 
 
  -  N.M. Shaalan, M. Rashad, C. Awada, Synergistic effect
    of NiO-Ga2O2-graphene heterostructures on Congo red
    photodegradation in water, Separations, 9 (2022) 201,
  doi: 10.3390/separations9080201. 
 
  -  M.M. Lucchese, F. Stavale, E.H.M. Ferreira, C. Vilani,
    M.V.O. Moutinho, R.B. Capaz, C.A. Achete, A. Jorio, Quantifying
    ion-induced defects and Raman relaxation length in
    graphene, Carbon N.Y., 48 (2010) 1592–1597. 
 
  -  A.C. Ferrari, Raman spectroscopy of graphene and graphite:
    disorder, electron–phonon coupling, doping and nonadiabatic
    effects, Solid State Commun., 143 (2007) 47–57. 
 
  -  N.M. Shaalan, F. Ahmed, S. Kumar, A. Melaibari,
    P.M.Z. Hasan, A. Aljaafari, Monitoring food spoilage based on
    a defect-induced multiwall carbon nanotube sensor at room
    temperature: preventing food waste, ACS Omega, 5 (2020)
    30531–30537. 
 
  -  D. Dohy, G. Lucazeau, A. Revcolevschi, Raman spectra and
    valence force field of single-crystalline β Ga2O3, J. Solid State
  Chem., 45 (1982) 180–192. 
 
  -  T. Onuma, S. Fujioka, T. Yamaguchi, Y. Itoh, M. Higashiwaki,
    K. Sasaki, T. Masui, T. Honda, Polarized Raman spectra in
  β-Ga2O3 single crystals, J. Cryst. Growth, 401 (2014) 330–333. 
 
  -  H. Zhu, R. Jiang, Y. Fu, Y. Guan, J. Yao, L. Xiao, G. Zeng, Effective
    photocatalytic decolorization of methyl orange utilizing TiO2/ZnO/chitosan nanocomposite films under simulated solar
  irradiation, Desalination, 286 (2012) 41–48. 
 
  -  S. Farhadi, K. Pourzare, S. Sadeghinejad, Simple preparation
    of ferromagnetic Co3O4 nanoparticles by thermal dissociation
    of the [CoII(NH3)4](NO3)2 complex at low temperature,
  J. Nanostruct. Chem., 3 (2013) 16, doi: 10.1186/2193-8865-3-16. 
 
  -  A. Fisal, W.M.A.W. Daud, M.A. Ahmad, R. Radzi, Using
    cocoa (Theobroma cacao) shell-based activated carbon to
    remove 4-nitrophenol from aqueous solution: kinetics and
    equilibrium studies, Chem. Eng. J., 178 (2011) 461–467. 
 
  -  H.A. Al-Aoh, M.J. Maah, R. Yahya, M.R. Bin Abas, A comparative
    investigation on adsorption performances of activated
    carbon prepared from coconut husk fiber and commercial
    activated carbon for Acid red 27 dye, Asian J. Chem., 25 (2013)
    9582, doi: 10.14233/ajchem.2013.15082A. 
 
  -  Y. Bulut, Z. Tez, Adsorption studies on ground shells of
    hazelnut and almond, J. Hazard. Mater., 149 (2007) 35–41. 
 
  -  G. Akkaya, A. Özer, Biosorption of Acid red 274 (AR 274) on
    Dicranella varia: determination of equilibrium and kinetic
    model parameters, Process Biochem., 40 (2005) 3559–3568. 
 
  -  H. Yan, J. Hou, Z. Fu, B. Yang, P. Yang, K. Liu, M. Wen,
    Y. Chen, S. Fu, F. Li, Growth and photocatalytic properties of
    one-dimensional ZnO nanostructures prepared by thermal
    evaporation, Mater. Res. Bull., 44 (2009) 1954–1958. 
 
  -  M. Khan, M.N. Tahir, S.F. Adil, H.U. Khan, M. Rafiq H. Siddiqui,
    A.A. Al-Warthan, W. Tremel, Graphene based metal and
    metal oxide nanocomposites: synthesis, properties and their
    applications, J. Mater. Chem. A, 3 (2015) 18753–18808. 
 
  -  A. Kundu, A. Mondal, Photodegradation of methylene
    blue under direct sunbeams by synthesized anatase titania
    nanoparticles, SN Appl. Sci., 1 (2019) 1–17. 
 
  -  N.M. Shaalan, M. Rashad, O. Saber, A. Alshoaibi, C. Awada,
    A comprehensive photocatalysis study of promising zirconia/laser-induced graphene nanocomposite for wastewater
    treatment-based methylene blue pollution, Separations, 9 (2022)
    185, doi: 10.3390/separations9080185. 
 
  -  X. Yin, L. Liu, F. Ai, Enhanced photocatalytic degradation
    of methylene blue by WO3 nanoparticles under NIR light
    irradiation, Front. Chem., 9 (2021) 1–9. 
 
  -  M. Rashad, N.M. Shaalan, A.M. Abd-Elnaiem, Degradation
    enhancement of methylene blue on ZnO nanocombs
    synthesized by thermal evaporation technique, Desal. Water
    Treat., 57 (2016) 26267–26273.