A series of biomass cellulose-derived carbon nanofibers (CCNF) were prepared at different pyrolysis temperatures in this study. Subsequently, this CCNF was combined with bismuth oxybromide (BiOBr) to form BiOBr/CCNF composite. The feasibility of BiOBr/CCNF as photocatalyst was investigated for the treatment against organic dye, rhodamine B (RhB) and inorganic metal ion, hexavalent chromium (Cr(VI)). The effect of the pyrolysis temperature on the properties (e.g., crystalline structure, functional group distribution, and graphitization degree) of the prepared CCNF was investigated in relation to its photocatalytic performance. A pyrolysis temperature over 800 °C resulted in CCNF with higher degrees of graphitization which was accompanied by a better photocatalytic performance of its composite against RhB and Cr(VI). Their reaction kinetic rates were estimated as 8.15 × 10-2 and 0.21 mmol/g/h, respectively (at the initial concentration of 10 mg/L), while their quantum yield values were 1.56 × 10-6 and 3.83 × 10-6 molecules per photon, respectively. BiOBr/CCNF catalysts were efficient enough to simultaneously remove RhB and Cr(VI) through the generation of active oxidative and reductive oxygen species, respectively. The strategies used in this study offer a new pathway for preparing cost-effective photocatalysts with biomass derived carbonaceous materials for the efficient removal of multicomponent contaminants in water.

中文翻译：

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使用结合了溴氧化铋的纤维素碳纳米纤维同时从水中去除若丹明B和Cr（VI）：纤维素热解温度对光催化性能的影响。

在本研究中，在不同的热解温度下制备了一系列生物质纤维素衍生的碳纳米纤维（CCNF）。随后，将该CCNF与氢溴酸铋（BiOBr）结合以形成BiOBr / CCNF复合材料。研究了BiOBr / CCNF作为光催化剂用于处理有机染料，若丹明B（RhB）和无机金属离子，六价铬（Cr（VI））的可行性。考察了热解温度对所制备CCNF的性能（如晶体结构，官能团分布和石墨化度）的影响及其光催化性能。超过800°C的热解温度导致CCNF的石墨化程度更高，并且其复合材料对RhB和Cr（VI）的光催化性能更好。它们的反应动力学速率估计分别为8.15×10-2和0.21 mmol / g / h（在初始浓度10 mg / L时），而它们的量子产率分别为1.56×10-6和3.83×10-6。每个光子的分子数。BiOBr / CCNF催化剂的效率足以通过分别产生活性氧化和还原氧物种同时去除RhB和Cr（VI）。这项研究中使用的策略提供了一条新途径，可以利用生物质衍生的含碳材料制备具有成本效益的光催化剂，从而有效去除水中的多组分污染物。BiOBr / CCNF催化剂的效率足以通过分别产生活性氧化和还原氧物种同时去除RhB和Cr（VI）。这项研究中使用的策略提供了一条新途径，可以利用生物质衍生的含碳材料制备具有成本效益的光催化剂，从而有效去除水中的多组分污染物。BiOBr / CCNF催化剂的效率足以通过分别产生活性氧化和还原氧物种同时去除RhB和Cr（VI）。这项研究中使用的策略提供了一条新途径，可以利用生物质衍生的含碳材料制备具有成本效益的光催化剂，从而有效去除水中的多组分污染物。