ABSTRACT The growing need to address environmental challenges and achieve sustainable energy production has spurred significant research into advanced photocatalysis, focusing on innovative materials that maximize solar energy utilization to address environmental issues. This strategy effectively “kills two birds with one stone” by addressing both energy and environmental concerns simultaneously. Among photocatalytic materials, cadmium sulfide (CdS) has gained significant attention for its favorable properties, including a narrow band gap (∼2.4 eV), visible‐light responsiveness, optimal band positions, and strong reducing capabilities for surface catalytic reactions. This review explores the fundamental principles of photocatalysis, focusing on the role of CdS in harnessing solar energy for chemical processes such as hydrogen production and CO 2 reduction. Key advancements in CdS‐based photocatalytic systems are discussed, emphasizing various synthesis methods, structural and morphological modifications, and strategies to enhance photocatalytic efficiency. The material's exceptional charge‐carrier transport properties are highlighted, showcasing its potential to achieve efficient photoreactions. This review further explores the incorporation of dopants and the formation of heterojunctions to address performance limitations through band structure engineering and to improve photocatalytic efficiency. Challenges such as photocorrosion, stability, and toxicity are critically analyzed, along with proposed strategies to overcome these barriers. By addressing both the opportunities and obstacles, this review underscores the transformative potential of CdS in developing efficient and sustainable photocatalytic systems. The findings contribute to advancing CdS‐based technologies for a carbon‐neutral future, promoting cleaner energy solutions through hydrogen generation and CO 2 reduction.
Ravi et al. (Fri,) studied this question.