| 552 | 1 | 18 |
| 下载次数 | 被引频次 | 阅读次数 |
二维过渡金属碳化物MXene(Ti_3C2)因其优良二维层状结构及导电性被认为是一种理想的光催化材料。采用两步水热法结合原位自氧化方法合成了NiS/TiO2/Ti_3C2(TCTNS)三元复合光催化剂。运用多种分析手段(场发射扫描电子显微镜(FESEM)、X射线衍射仪(XRD)、紫外-可见光(UV-Vis)吸收光谱仪及光电流测试)对其结构进行了表征，研究了其光催化分解水产氢的活性，探讨了材料的组成、结构与性能之间的相互影响。结果表明，与单一NiS和二元TiO2/Ti_3C2催化剂相比，复合光催化剂具有更高的光电性能。其可见光驱动的光催化H2产氢速率可达3 269μmol/(g·h),是二元TiO2/Ti_3C2产氢速率的约19倍。实验结果表明，由于NiS和TiO2纳米颗粒覆盖重建的多异质结界面，以及TCTNS复合光催化剂中存在更多的电子转移通道，复合光催化剂可显著抑制光生载流子的复合，实现高效的光-电能源转换，因此在光催化产氢领域有广阔的应用前景。
Abstract：Two-dimensional transition metal carbide(Ti_3C2, MXene) is considered as an ideal photocatalytic material due to its excellent two-dimensional layered structure and electrical conductivity. NiS/TiO2/Ti_3C2(TCTNS) ternary photocatalyst was synthesized by a two-step hydrothermal method combined with in situ autooxidation. A variety of analytical methods(field emission scanning electron microscope(FESEM), X-ray diffractometer(XRD), ultraviolet-visible(UV-Vis) absorption spectrometer and photocurrent measurement) were used to characterize the structure of the material, and the activity of the photocatalytic decomposition of aquatic hydrogen was studied. The interaction between the composition, structure and properties of the material was discussed. The results show that compared with single NiS and binary TiO2/Ti_3C2 catalysts, the composite photocatalyst has higher photoelectric property. The hydrogen production rate of photocatalytic H2 driven by visible light can reach 3 269 μmol/(g·h), which is 19 times of that of binary TiO2/Ti_3C2. The experimental results show that the recombination of photogenerated carriers can be significantly inhibited by the reconstructed multiple heterogeneous interface covered with NiS and TiO2 nanoparticles, and more electron transfer channels in TCTNS composite photocatalyst, and efficient photoelectric energy conversion can be achieved. Therefore, it has a broad application prospect in the field of photocatalytic hydrogen production.
[1] KUANG P Y,LO J X,CHENG B,et al.MXene-based photocatalysts[J].Journal of Materials Science & Technology,2020,56:18-44.
[2] LIU F F,JIN S,XIA Q X,et al.Research progress on construction and energy storage performance of MXene heterostructures[J].Journal of Energy Chemistry,2021,62:220-242.
[3] SINGH M,SINGH A K.Performance improvement of photovoltaic:utilization of two-dimensional Ti3C2Tx MXene[J].Surface and Interface,2021,27:101566-1-101566-13.
[4] SUN J,KONG W H,JIN Z Y,et al.Recent advances of MXene as promising catalysts for electrochemical nitrogen reduction reaction[J].Chinese Chemical Letters,2020,31 (4):953-960.
[5] LIU P G,LIU W F,LIU K Y,et al.Rational modulation of emerging MXene materials for zinc-ion storage[J].Carbon,2021,4(1):60-76.
[6] JIN Y,FAN Y Y,MENG X X,et al.Modeling of hydrated cations transport through 2D MXene (Ti3C2Tx) membranes for water purification[J].Journal of Membrane Science,2021,631:119346-1-119346-11.
[7] AI Z Z,ZHANG K,CHANG B,et al.Construction of CdS@Ti3C2@CoO hierarchical tandem p-n heterojunction for boosting photocatalytic hydrogen production in pure water[J].Chemical Engineering Journal,2020,383:123130-1-123130-9.
[8] FANG Y,CAO Y,CHEN Q L,et al.Synthesis of an Ag2WO4/Ti3C2 Schottky composite by electrostatic traction and its photocatalytic activity[J].Ceramics International,2019,45 (17):22298-22307.
[9] LI X T,LV X D,SUN X N,et al.Edge-oriented,high-percentage 1T'-phase MoS2 nanosheets stabilize Ti3C2 MXene for efficient electrocatalytic hydrogen evolution[J].Applied Catalysis:B,2021,284:119708-1-119708-11.
[10] LI Y,ZHANG D N,FENG X H,et al.Truncated octahedral bipyramidal TiO2/MXene Ti3C2 hybrids with enhanced photocatalytic H2 production activity[J].Nanoscale Advances,2019,1(5):1812-1818.
[11] LIU J,KONG X C,LI Y Y,et al.In situ synthesis of exfoliation TiO2@C hybrids with enhanced photocatalytic hydrogen evolution activity[J].Applied Surface Science,2020,530:147283-1-147283-11.
[12] LIU Y P,LI Y H,LI X Y,et al.Regulating electron-hole separation to promote photocatalytic H2 evolution activity of nanoconfined Ru/MXene/TiO2 catalysts[J].ACS Nano,2020,14(10):14181-14189.
[13] WU J L,ZHANG Y,LU P,et al.Engineering 2D multi-hetero-interface in the well-designed nanosheet composite photocatalyst with broad electron-transfer channels for highly-efficient solar-to-fuels conversion[J].Applied Catalysis:B,2021,286:119944-1-119944-10.
[14] MENG J L,LI Y D.A high H2 evolution rate under visible light of a CdS/ TiO2@NiS catalyst due to a directional electron transfer between the phases[J].Chinese Journal of Chemical Engineering,2019,27:544-548.
[15] XING Z P,ZHANG J Q,CUI J Y,et al.Recent advances in floating TiO2-based photocatalysts for environmental application[J].Applied Catalysis:B,2018,225:452-467.
[16] MASIH D,MA Y Y,ROHANI S.Graphitic C3N4 based noble-metal-free photocatalyst systems:a review[J].Applied Catalysis:B,2017,206:556-588.
[17] LIU N,SCHNEIDER C,FREITAG D,et al.Black TiO2 nanotubes:cocatalyst-free open-circuit hydrogen generation[J].Nano Letters,2014,14(6):3309-3313.
[18] HE J,WU P W,CHEN L L,et al.Dynamically-generated TiO2 active site on MXene Ti3C2:boosting reactive desulfurization[J].Chemical Engineering Journal,2021,416:129022-1-129022-13.
[19] LUO Y N,LI Y,QIAN L L,et al.Excellent photocataly-tic performance from NiS decorated TiO2 nanoflowers with exposed {001} facets[J].Materials Research Bulletin,2020,130:110945-1-110945-9.
基本信息:
DOI：10.13250/j.cnki.wndz.2023.04.005
中图分类号:O643.36;O644.1;TQ116.2
引用信息:
[1]姚庆,顼建乐,金闯,等.NiS/TiO_2/Ti_3C_2三元异质结结构的构筑及光催化产氢性能[J].微纳电子技术,2023,60(04):526-533.DOI:10.13250/j.cnki.wndz.2023.04.005.
基金信息:
国家自然科学基金(61904122); 山西省青年科学基金(201901D211074,20210302124479)
2023-04-03
2023-04-03
2023-04-03