To overcome the limitations of the application

The gap

Evidence profile

Sourced from the future-work section and limitations section and stated challenges and stated research gap of the source papers, classified as general, drawn from work published between 2024 and 2026, spanning 7 journals. Those papers have been cited 388 times in total.

Supporting evidence — 8 representative gaps

• Fabrication of ZnO Scaffolded CdS Nanostructured Photoanodes with Enhanced Photoelectrochemical Water Splitting Activity under Visible Light (2024) · Langmuir · cited 27× · doi

  Further research could investigate the use of different materials and structures to enhance photoelectrochemical properties. Research could also focus on scaling up the production of ZnO/CdS nanostructures. The study of the long-term stability and durability of the ZnO/CdS photoelectrodes could be a direction for future research.

  generalfuture-work section
  Keywords: further research investigate use different materials structures enhance
• Investigation of photocatalytic properties of Cu & Rb Co-doped ZnO thin films via sol-gel spin coating method (2026) · Journal of Sol-Gel Science and Technology · doi

  Future studies can investigate the long-term stability of the Cu/Rb: ZnO thin films. Future studies can examine the photocatalytic activity of the Cu/Rb: ZnO thin films in different light sources. Future studies can explore the use of Cu/Rb: ZnO thin films in combination with other technologies to enhance their photocatalytic activity.

  generalfuture-work sectionevidence 5/5
  Keywords: future studies investigate long-term stability zno thin films
• Photocatalytic systems: reactions, mechanism, and applications (2024) · RSC Advances · cited 359× · doi

  To overcome the limitations of the application and efficiency of photocatalysts. To promote the use of photocatalysts on a large scale for the development of industrial activities. To explore the potential applications of photocatalysts in various fields.

  generalfuture-work sectionevidence 5/5
  Keywords: overcome limitations application efficiency photocatalysts promote use large
• Enhancement of ZnO photocatalytic activity through Li and Mg doping: synthesis, characterization, and performance analysis (2026) · Nanotechnology for Environmental Engineering · doi

  Future studies can investigate the effect of other dopants on the photocatalytic activity of ZnO. The study of the photocatalytic activity of ZnO under different light sources and conditions can be explored. The development of more efficient and sustainable photocatalysts for environmental applications is a potential area of future research.

  generalfuture-work sectionevidence 5/5
  Keywords: future studies investigate effect other dopants photocatalytic activity
• Enhancement of ZnO photocatalytic activity through Li and Mg doping: synthesis, characterization, and performance analysis (2026) · Nanotechnology for Environmental Engineering · doi

  The content of Li in doped ZnO variants could not be estimated by EDS analysis due to its low ionization energy. The diffusion of Mg into the hydrogel matrix during gelation was limited by synthesis conditions. The study only investigated the photocatalytic activity of the catalysts under visible light irradiation.

  generallimitations sectionevidence 5/5
  Keywords: content doped zno variants estimated eds analysis due
• Nanostructured Bi2O3/ZnO p–n heterojunction photocatalyst derived from ZnBi-NO3 layered double hydroxides for photocatalytic degradation of methylene blue in water samples (2026) · Reaction Kinetics, Mechanisms and Catalysis · doi

  The investigation of the scalability of the synthesis method. The evaluation of the stability and reusability of the photocatalyst. The comparison of the performance of the nanostructured Bi2O3/ZnO p–n heterojunction photocatalyst with other photocatalysts.

  generalfuture-work sectionevidence 5/5
  Keywords: investigation scalability synthesis method evaluation stability reusability photocatalyst
• Eco-Friendly Bioinspired Synthesis and Environmental Applications of Zinc Oxide Nanoparticles Mediated by Natural Polysaccharide Gums: A Sustainable Approach to Nanomaterials Fabrication (2026) · Nanomaterials · cited 2× · doi

  The need to control nucleation and growth to produce stable and spherical ZnO particles, - The need to reduce the dependence on petroleum-based chemicals and minimize hazardous byproducts, - The need to develop a sustainable and environmentally friendly approach for ZnO nanoparticle synthesis.

  generalstated challengesevidence 5/5
  Keywords: need control nucleation growth produce stable spherical zno
• Green synthesis of SnO2–TiO2 nanocomposite using pomegranate peel extract for efficient photocatalytic degradation of Alizarin Red dye (2026) · Chemical Papers · doi

  The need for efficient photocatalytic degradation methods for synthetic dyes. The limitation of TiO2 due to its wide band gap and rapid recombination of photogenerated electron-hole pairs. The potential of using SnO2 as a partner semiconductor to improve photocatalytic performance.

  generalstated research gapevidence 5/5
  Keywords: need efficient photocatalytic degradation methods synthetic dyes limitation

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