Photocatalytic H₂ evolution from water splitting in liquid-solid two-phase requires an efficient photocatalyst with excellent ability of charge separation and reactant molecular diffusion. In this study, the super hydrophilic-electrons acceptor with abundant –C=O and –OH functional groups were evenly grafted onto rutile TiO₂ nanorods surface to speed up the charge separation and water molecular diffusion, respectively. The photocatalytic results showed that the TiO₂-CA grafted by citric acid (with three –C=O, three carboxy-(–OH) and one alcohol-(–OH)) presented a 1.48° contact angle and a distinct increased H₂-production activity (48.5 mmol·h^-1·g^-1), whereas the TiO₂-PA grafted by propane-1,2,3-tricarboxylic acid (Just lack of one alcohol-(–OH) compared with TiO₂-CA) showed a 30.95° contact angle and a decreased H₂-production activity (19.3 mmol·h^-1·g^-1) compared to the unmodified TiO₂ (25.8 mmol·h^-1·g^-1), indicating that the super hydrophilic-electrons acceptor is vitally important to the photocatalytic activity of TiO₂. Based on the present results, the carbonyl group (–C=O) possess a stronger reducing capability and act as “electrons acceptor”, while the only alcohol-hydroxyl group (–OH) in TiO₂-CA can decrease the mass transfer resistance and serve as “super hydrophilic absorber”. Considering its mild preparation, inexpensive cost, and admirable efficiency, the super hydrophilic-electrons acceptor with dual functional groups regulated TiO₂ can become a promising way for potential application in photocatalytic field.

液-固两相中水分解的光催化H _{2释放需要具有优异的电荷分离和反应物分子扩散能力的高效光催化剂。} 在本研究中，将具有丰富的–C=O 和–OH 官能团的超亲水电子受体均匀接枝到金红石TiO ₂纳米棒表面，分别加速电荷分离和水分子扩散。光催化结果表明，柠檬酸接枝的TiO 2 -CA（三个-C=O，三个羧基-（-OH）和一个醇-（-OH））呈现出1.48°的接触角和明显增加的_{H 2} -生产活性（48.5 mmol·h ^-1 ·g ^-1），而TiO丙烷-1,2,3-三羧酸接枝的_{2 -PA（与 TiO 2} -CA 相比只缺少一种醇-(-OH) ）显示出 30.95° 的接触角和降低的 H _{2 -}产生活性（19.3 mmol ·h ^-1 ·g ^-1 )与未改性的TiO ₂ (25.8 mmol·h ^-1 ·g ^-1 )相比，表明超亲水电子受体对TiO ₂的光催化活性至关重要。_{根据目前的结果，羰基（-C=O）具有更强的还原能力，充当“电子受体”，而TiO 2}中唯一的醇羟基（-OH）-CA可以降低传质阻力，起到“超亲水吸收剂”的作用。考虑到其温和的制备、廉价的成本和令人钦佩的效率，具有双官能团调节的超亲水电子受体 TiO ₂可能成为光催化领域潜在应用的一种有前途的方式。