Cutting edge research within solar energy harvesting focuses on H₂ production from photocatalytic overall water splitting (OWS) using artificial two-step photoexcitation system known as Z-scheme. Inspired by natural photosynthesis, Z-scheme imparts a unique vectorial electron transfer from the ingenious arrangement of PS I-PS II coupling connected by an electron mediator. This allows Z-scheme to confer efficient charge isolation and split water into its constituent components, hydrogen (H₂) and oxygen (O₂), at two different positions with strong redox ability. More recently, particulate Z-scheme photocatalyst sheets have been worth noting as potentially scalable approach for solar water splitting. In this contribution, particulate Z-scheme photocatalyst sheets were developed using P-doped twinned Zn_0.5Cd_0.5S_1-x (d-ZCS-P) as hydrogen evolution photocatalysts (HEP) and Bi₄NbO₈Cl as oxygen evolution photocatalysts (OEP), which both embedded on N-doped carbon nanotubes (N-CNTs) as carbon conductive film. Further surface modification on photocatalyst sheets through concerted deposition of co-catalyst and protective shell warrants an efficient overall water splitting from pure water, with a solar-to-hydrogen conversion efficiency (STH) of 0.15% under ambient condition. The rational Z-scheme configuration of photocatalyst sheets alleviates the effect of H⁺ and OH^- concentration overpotentials which in turn bolstering the photocatalytic performance and paves a promising way of solar energy augmentation.

太阳能收集领域的前沿研究集中于使用称为Z方案的人工两步光激发系统从光催化总水分解（OWS）中生产H ₂。受自然光合作用的启发，Z方案通过由电子介体连接的PS I-PS II偶联的巧妙排列赋予了独特的矢量电子转移。这使得Z方案可以实现有效的电荷隔离，并将水分解成氢（H ₂）和氧（O ₂）的组成成分。），在两个不同的位置具有强大的氧化还原能力。最近，作为太阳能分解的潜在可扩展方法，已经注意到了颗粒状的Z型光催化剂片。在这一贡献中，使用掺P的孪晶Zn _0.5 Cd _0.5 S _1-x（d-ZCS-P）作为析氢光催化剂（HEP）和Bi ₄ NbO ₈开发了颗粒状Z型光催化剂片材。Cl作为析氧光催化剂（OEP），都嵌入在N掺杂的碳纳米管（N-CNT）上作为碳导电膜。通过协同沉积助催化剂和保护壳，对光催化剂片材进行进一步的表面改性，可确保从纯净水中高效分离总水，在环境条件下的太阳能转化效率为0.15％。光催化剂片的合理的Z-方案配置减轻H的效果⁺和OH ^-其又bolstering光催化性能和铺平太阳能增强的有前途的方式浓度的超电势。