通过共共享铋原子在 Bi-MOF 纳米片上原位生长 Cs3Bi2Br9 量子点用于 CO2 捕获和光催化还原,Inorganic Chemistry

当前位置： X-MOL 学术 › Inorg. Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

通过共共享铋原子在 Bi-MOF 纳米片上原位生长 Cs3Bi2Br9 量子点用于 CO2 捕获和光催化还原
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2023-01-24 , DOI: 10.1021/acs.inorgchem.2c04041
Lan Ding ₁ , Yongping Ding _{1,

2} , Fenghua Bai ₃ , Gonglai Chen ₃ , Shuwei Zhang ₃ , Xiaoxue Yang ₃ , Huiqin Li ₁ , Xiaojing Wang _{1,

3}

Affiliation

鉴于大气中过量的 CO ₂积累导致全球变暖，必须通过使用太阳能捕获 CO 2 并将其转化为化学原料来减少 CO _{2 。}在此，一种新型 Cs ₃ Bi ₂ Br ₉_/铋_{基金属有机骨架 (Bi-}_MOF )复合材料通过在Bi- MOF 纳米片通过共同的铋原子。所制备的 Cs ₃ Bi ₂ Br ₉ /Bi-MOF 具有双功能优点，既能高捕获又能有效转化 CO ₂，其中优化后的3Cs ₃ Bi ₂ Br ₉ /Bi-MOF样品在300 W Xe灯的照射下CO ₂ -CO转化率高达572.24 μmol g ^–1 h ^{–1 。}此外，复合材料在潮湿空气中循环五次后表现出良好的稳定性，CO ₂光还原效率没有明显下降。_{机理研究表明，Cs 3} Bi ₂ Br ₉和 Bi-MOF 之间通过共享原子的密切原子级接触不仅改善了 Cs ₃ Bi ₂ Br _9的分散QDs over Bi-MOF nanosheets 还通过形成强大的键合连接加速界面电荷转移，这赋予它最佳的 CO ₂光还原性能。我们通过共共享原子对铋基金属有机骨架/无铅卤化物钙钛矿的新发现为原子级接触异质结的新型制备策略以及在 CO ₂捕获和光催化转化中的潜在应用开辟了一条新途径。

"点击查看英文标题和摘要"

In Situ Growth of Cs3Bi2Br9 Quantum Dots on Bi-MOF Nanosheets via Cosharing Bismuth Atoms for CO2 Capture and Photocatalytic Reduction

Given the global warming caused by excess CO₂ accumulation in the atmosphere, it is essential to reduce CO₂ by capturing and converting it to chemical feedstock using solar energy. Herein, a novel Cs₃Bi₂Br₉/bismuth-based metal–organic framework (Bi-MOF) composite was prepared via an in situ growth strategy of Cs₃Bi₂Br₉ quantum dots (QDs) on the surface of Bi-MOF nanosheets through coshared bismuth atoms. The prepared Cs₃Bi₂Br₉/Bi-MOF exhibits bifunctional merits for both the high capture and effective conversion of CO₂, among which the optimized 3Cs₃Bi₂Br₉/Bi-MOF sample shows a CO₂–CO conversion yield as high as 572.24 μmol g^–1 h^–1 under the irradiation of a 300 W Xe lamp. In addition, the composite shows good stability after five recycles in humid air, and the CO₂ photoreduction efficiency does not decrease significantly. The mechanistic investigation uncovers that the intimate atomic-level contact between Cs₃Bi₂Br₉ and Bi-MOF via the coshared atoms not only improves the dispersion of Cs₃Bi₂Br₉ QDs over Bi-MOF nanosheets but also accelerates interfacial charge transfer by forming a strong bonding linkage, which endows it with the best performance of CO₂ photoreduction. Our new finding of bismuth-based metal–organic framework/lead-free halide perovskite by cosharing atoms opens a new avenue for a novel preparation strategy of the heterojunction with atomic-level contact and potential applications in capture and photocatalytic conversion of CO₂.

更新日期：2023-01-24

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南