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Coordination Polymer Derived [email protected]3N4 Composite Photocatalyst for Sulfur Vacancy and Photothermal Effect Synergistic Enhanced H2 Production
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-07-19 00:00:00 , DOI: 10.1021/acssuschemeng.8b02153 Lele Lu 1 , Xinxin Xu 1 , Kaili An 1 , Yun Wang 1 , Fa-nian Shi 2
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-07-19 00:00:00 , DOI: 10.1021/acssuschemeng.8b02153 Lele Lu 1 , Xinxin Xu 1 , Kaili An 1 , Yun Wang 1 , Fa-nian Shi 2
Affiliation
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To obtain the photocatalyst composed by sulfur vacancies rich NiS and graphitic carbon nitride (g-C3N4), a simple method has been found for using coordination polymer as precursor. Based on this strategy, an effective composite photocatalyst, [email protected]3N4, is synthesized successfully through the calcination of a Ni2+ based coordination polymer with 2-mercapto-5-propylpyrimidine as ligand. In this photocatalyst, the NiS nanoparticles with small size disperse evenly in 2-mercapto-5-propylpyrimidine derived g-C3N4. Electron paramagnetic resonance (EPR) suggests there are a lot of sulfur vacancies in [email protected]3N4. [email protected]3N4 exhibits intensive adsorption in the near-infrared region, which endows [email protected]3N4 with promising photothermal effect. With a 980 nm laser as light source (0.44 W·cm–2), the aqueous dispersion of [email protected]3N4 exhibits a temperature elevation of 56.7 °C with photothermal conversion efficiency of 58.2%. Under irradiation of simulated solar light, without Pt co-catalyst, [email protected]3N4 possesses a promising photocatalytic H2 production rate, with the value 31.3 mmol·g–1·h–1. In five cycles of reactions for 30 h, the H2 production rate remains constant. The synergy between sulfur vacancy and photothermal effect of NiS play significant roles in the enhancement of H2 production property.
中文翻译：
配位聚合物衍生[电子邮件保护] 3 Ñ 4复合光催化剂对硫空缺和光热效应协同增强ħ 2生产
为了获得由富含硫空位的NiS和石墨氮化碳（gC 3 N 4）组成的光催化剂，已经找到了一种简单的方法将配位聚合物用作前体。基于该策略，通过以2-巯基-5-丙基嘧啶为配体的Ni 2+基配位聚合物的煅烧，成功合成了一种有效的复合光催化剂[email protected] 3 N 4。在该光催化剂中，小尺寸的NiS纳米颗粒均匀地分散在2-巯基-5-丙基嘧啶衍生的gC 3 N 4中。电子顺磁共振（EPR）表明[电子邮件保护] 3 N中有很多硫空位4。[电子邮件保护的] 3 N 4在近红外区域表现出强烈的吸附，这赋予[电子邮件保护的] 3 N 4具有良好的光热效应。以980 nm激光作为光源（0.44 W·cm –2），[受电子邮件保护] 3 N 4的水分散体的温度升高为56.7°C，光热转换效率为58.2％。在没有Pt助催化剂的模拟太阳光照射下，[电子邮件保护的] 3 N 4具有令人满意的光催化H 2生成速率，值为31.3 mmol·g –1 ·h –1。在30小时的五个反应周期中，H 2的产生速率保持恒定。NiS的硫空位与光热效应之间的协同作用在提高H 2的生产性能中起着重要的作用。
更新日期：2018-07-19
中文翻译：
配位聚合物衍生[电子邮件保护] 3 Ñ 4复合光催化剂对硫空缺和光热效应协同增强ħ 2生产
为了获得由富含硫空位的NiS和石墨氮化碳（gC 3 N 4）组成的光催化剂，已经找到了一种简单的方法将配位聚合物用作前体。基于该策略，通过以2-巯基-5-丙基嘧啶为配体的Ni 2+基配位聚合物的煅烧，成功合成了一种有效的复合光催化剂[email protected] 3 N 4。在该光催化剂中，小尺寸的NiS纳米颗粒均匀地分散在2-巯基-5-丙基嘧啶衍生的gC 3 N 4中。电子顺磁共振（EPR）表明[电子邮件保护] 3 N中有很多硫空位4。[电子邮件保护的] 3 N 4在近红外区域表现出强烈的吸附，这赋予[电子邮件保护的] 3 N 4具有良好的光热效应。以980 nm激光作为光源（0.44 W·cm –2），[受电子邮件保护] 3 N 4的水分散体的温度升高为56.7°C，光热转换效率为58.2％。在没有Pt助催化剂的模拟太阳光照射下，[电子邮件保护的] 3 N 4具有令人满意的光催化H 2生成速率，值为31.3 mmol·g –1 ·h –1。在30小时的五个反应周期中，H 2的产生速率保持恒定。NiS的硫空位与光热效应之间的协同作用在提高H 2的生产性能中起着重要的作用。
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