OOIR: Observatory of International Research

Papers

(The H4-Index of Catalysts is 54. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2020-11-01 to 2024-11-01.)

Article	Citations
Green Synthesis of Metallic Nanoparticles: Applications and Limitations	324
C-,N- and S-Doped TiO2 Photocatalysts: A Review	187
A Review of Hydrogen Purification Technologies for Fuel Cell Vehicles	179
A CeO2 Semiconductor as a Photocatalytic and Photoelectrocatalytic Material for the Remediation of Pollutants in Industrial Wastewater: A Review	171
Classification, Synthetic, and Characterization Approaches to Nanoparticles, and Their Applications in Various Fields of Nanotechnology: A Review	166
Recovery/Reuse of Heterogeneous Supported Spent Catalysts	153
Hydrochar: A Review on Its Production Technologies and Applications	139
A Review on Green Synthesis of Nanoparticles and Their Diverse Biomedical and Environmental Applications	125
Recent Advances in Glycerol Catalytic Valorization: A Review	116
Hall Current and Soret Effects on Unsteady MHD Rotating Flow of Second-Grade Fluid through Porous Media under the Influences of Thermal Radiation and Chemical Reactions	112
Photocatalytic Degradation of Organic and Inorganic Pollutants to Harmless End Products: Assessment of Practical Application Potential for Water and Air Cleaning	109
The Catalytic Activity of Biosynthesized Magnesium Oxide Nanoparticles (MgO-NPs) for Inhibiting the Growth of Pathogenic Microbes, Tanning Effluent Treatment, and Chromium Ion Removal	103
Main Hydrogen Production Processes: An Overview	96
Current Status and Future Perspectives of Supports and Protocols for Enzyme Immobilization	93
Metal-Organic Frameworks as a Platform for CO2 Capture and Chemical Processes: Adsorption, Membrane Separation, Catalytic-Conversion, and Electrochemical Reduction of CO2	90
A Review on Biological Synthesis of the Biodegradable Polymers Polyhydroxyalkanoates and the Development of Multiple Applications	88
Green Synthesis of TiO2 Nanoparticles Using Acorus calamus Leaf Extract and Evaluating Its Photocatalytic and In Vitro Antimicrobial Activity	86
Advances in Valorization of Lignocellulosic Biomass towards Energy Generation	84
Review on the Visible Light Photocatalysis for the Decomposition of Ciprofloxacin, Norfloxacin, Tetracyclines, and Sulfonamides Antibiotics in Wastewater	83
Biocatalysis with Laccases: An Updated Overview	82
An Overview of Lean Exhaust deNOx Aftertreatment Technologies and NOx Emission Regulations in the European Union	77
Application of TiO2-Based Photocatalysts to Antibiotics Degradation: Cases of Sulfamethoxazole, Trimethoprim and Ciprofloxacin	77
Current State and Perspectives on Transesterification of Triglycerides for Biodiesel Production	74
Metal Sulfide Photocatalysts for Hydrogen Generation: A Review of Recent Advances	72
Agro-Industrial Food Waste as a Low-Cost Substrate for Sustainable Production of Industrial Enzymes: A Critical Review	72

Titanium Dioxide as the Most Used Photocatalyst for Water Purification: An Overview	72
A Review on the Treatment of Petroleum Refinery Wastewater Using Advanced Oxidation Processes	71
Recent Development in Non-Metal-Doped Titanium Dioxide Photocatalysts for Different Dyes Degradation and the Study of Their Strategic Factors: A Review	69
Recent Progress in Low-Cost Catalysts for Pyrolysis of Plastic Waste to Fuels	67
Deactivation and Regeneration of Zeolite Catalysts Used in Pyrolysis of Plastic Wastes—A Process and Analytical Review	67
Visible-Light Photocatalysts and Their Perspectives for Building Photocatalytic Membrane Reactors for Various Liquid Phase Chemical Conversions	66
The Current State of Research on PET Hydrolyzing Enzymes Available for Biorecycling	65
Formic Acid Dehydrogenation Using Noble-Metal Nanoheterogeneous Catalysts: Towards Sustainable Hydrogen-Based Energy	65
Kinetics and Selectivity Study of Fischer–Tropsch Synthesis to C5+ Hydrocarbons: A Review	65
Recent Progress on Semiconductor Heterogeneous Photocatalysts in Clean Energy Production and Environmental Remediation	63
Effects of Reaction Temperature on the Photocatalytic Activity of TiO2 with Pd and Cu Cocatalysts	63
Tungsten-Based Catalysts for Environmental Applications	62
Catalytic Hydrogenation of CO2 to Methanol: A Review	62
Biological Synthesis of Nanocatalysts and Their Applications	62
Carbon Monoxide Tolerant Pt-Based Electrocatalysts for H2-PEMFC Applications: Current Progress and Challenges	60
A Review on Metal Ions Modified TiO2 for Photocatalytic Degradation of Organic Pollutants	60
Anti-Coking and Anti-Sintering Ni/Al2O3 Catalysts in the Dry Reforming of Methane: Recent Progress and Prospects	59
Green Synthesis of Flower-Shaped Copper Oxide and Nickel Oxide Nanoparticles via Capparis decidua Leaf Extract for Synergic Adsorption-Photocatalytic Degradation of Pesticides	59
Advanced Two-Dimensional Heterojunction Photocatalysts of Stoichiometric and Non-Stoichiometric Bismuth Oxyhalides with Graphitic Carbon Nitride for Sustainable Energy and Environmental Applications	58
Degradation Kinetics of Methyl Orange Dye in Water Using Trimetallic Fe/Cu/Ag Nanoparticles	57
Recent Developments in Dielectric Barrier Discharge Plasma-Assisted Catalytic Dry Reforming of Methane over Ni-Based Catalysts	57
Photocatalytic Degradation of the Light Sensitive Organic Dyes: Methylene Blue and Rose Bengal by Using Urea Derived g-C3N4/ZnO Nanocomposites	57
Surface Modification of Biochar for Dye Removal from Wastewater	56
Direct Synthesis of Dimethyl Ether from CO2: Recent Advances in Bifunctional/Hybrid Catalytic Systems	56
Preparation and Photocatalytic Activities of TiO2-Based Composite Catalysts	56
Current Trends and Future Prospects of Nanotechnology in Biofuel Production	56
Visible Light-Assisted Photocatalysis Using Spherical-Shaped BiVO4 Photocatalyst	55
Investigation of Advanced Oxidation Process in the Presence of TiO2 Semiconductor as Photocatalyst: Property, Principle, Kinetic Analysis, and Photocatalytic Activity	55
Metal Oxides as Catalyst/Supporter for CO2 Capture and Conversion, Review	54